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HP LaserJet 4000 Service Manual

Laserjet 4000 series; laserjet 4050 series.
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HP LaserJet 4000 and
4050 Series Printers
Service Manual

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   Summary of Contents for HP LaserJet 4000

  • Page 1

    HP LaserJet 4000 and 4050 Series Printers Service Manual...

  • Page 3

    HP LaserJet 4000 and 4050 Series Printers Service Manual _____________...

  • Page 4

    © Copyright Hewlett-Packard Warranty Trademark Credits Company 1999 The information contained in PostScript ™ is a trademark of All Rights Reserved. this document is subject to Adobe Systems Incorporated Reproduction, adaptation, or change without notice. which may be registered in translation without prior written certain jurisdictions.

  • Page 5: Table Of Contents

    HP FIRST ........

  • Page 6: Table Of Contents

    3 Printer Operation Overview ..........3-1 Using the Control Panel .

  • Page 7: Table Of Contents

    5 Functional Information Overview ..........5-1 Power Supply System .

  • Page 8: Table Of Contents

    4050 T/4050 TN)....... . . 6-54 PCA Cover (HP LaserJet 4000/4000 N and 4050/4050 N) . . 6-55 PCA Controller .

  • Page 9: Table Of Contents

    7 Troubleshooting Overview ..........7-1 Troubleshooting Process .

  • Page 10

    Contents-6...

  • Page 11: Overview

    Printer Description Overview This chapter discusses the following: Printer Features Identification Site Requirements Paper Specifications Safety Information Overview 1-1...

  • Page 12: Printer Features

    Printer Features Table 1-1. Printer Features for the HP LaserJet 4000 Series Printer Speed 17 pages per minute (ppm) 100 MHz RISC microprocessor First page out = 15 sec. Resolution 300 dpi with PCL5e/HP’s PostScript Level 2 emulation (PS) 600 dpi with PCL5e/PS...

  • Page 13

    Table 1-1. Printer Features for the HP LaserJet 4000 Series Printer (continued) Paper Trays 100-sheet Tray 1 Size: 3 by 5 in to legal (76 by 127 mm to 216 by 356 mm) 500-sheet Tray 2 (HP LaserJet 4000/ 4000 N)

  • Page 14

    Table 1-2. Printer Features for the HP LaserJet 4050 Series Printer Speed 17 pages per minute (ppm) 133 MHz RISC microprocessor First page out = 15 sec. “RIP ONCE” capability with 16 MB or hard disk option Resolution 300 dpi with PCL5e/HP’s PostScript...

  • Page 15

    Table 1-2. Printer Features for the HP LaserJet 4050 Series Printer (continued) Paper Trays 100-sheet Tray 1 Size: 3 by 5 to legal (76 by 127 mm to 216 by 356 mm) 500-sheet Tray 2 (HP LaserJet 4050/ 4050 N)

  • Page 16

    Table 1-3. Comparison of HP LaserJet 4000 Series Printers HP LaserJet HP LaserJet HP LaserJet HP LaserJet 4000 4000 T 4000 N 4000 TN Ethernet 10-T/ 10-2 optional optional standard standard LocalTalk Max. # Input Bins Standard RAM 4 MB internal...

  • Page 17

    Table 1-4. Comparison of HP LaserJet 4050 Series Printers HP LaserJet HP LaserJet HP LaserJet HP LaserJet 4050 4050 T 4050 N 4050 TN Ethernet 10-T/ 10-2 optional optional optional optional LocalTalk 10/100 Base TX optional optional standard standard Max. # Input Bins...

  • Page 18: Identification, Model And Serial Numbers

    The model number is alphanumeric, such as C4253A for the HP LaserJet 4050 N printer. The serial number contains information about the Country of Origin, the Revision Level, the Production Code, and Production Number of the printer.

  • Page 19: Site Requirements

    Install with enough space around the printer for proper access and ventilation. Install away from the direct flow of exhaust from air ventilation systems. Table 1-5. Electrical Specifications for the HP LaserJet 4000 and 4050 Series Printers Volts Frequency Amperes Watts (typical) 100-127 VAC±10%...

  • Page 20: Space Requirements

    Figure 1-2 Printer Dimensions Printer Weight (without Toner Cartridge) HP LaserJet 4000/4000 N and 4050/4050 N printers: 39.27 lb (17.85 kg) HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN printers: 45.66 lb (20.71 kg) 1-10 Printer Description...

  • Page 21: Environmental Requirements

    Environmental Requirements Table 1-6. Printer and Toner Cartridge Environmental Conditions Item Operating Storage ° ° Temperature 50-91 F (10-32 32 to 95° F (0 to 35°C) Relative Humidity 20-80% RH (with no 10% to 95% RH condensation) Table 1-7. Acoustic Emissions (Per ISO 9296) Printer State Sound Power Printing, 17 pages per minute...

  • Page 22: Paper Specifications

    Paper Specifications The following tables show paper specifications for the HP LaserJet 4000 and 4050 series printer. Table 1-8. Paper Specifications, Tray 1 Supported Dimensions* Weight Capacity** Paper Minimum Size 3 by 5 in*** (custom) (76 by 127 mm) 16 to 53 lb...

  • Page 23

    Table 1-10. Paper Specifications, Trays 2 and 3 (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Supported Dimensions* Weight Capacity** Paper Letter 8.5 by 11 in (216 by 279 mm) 8.3 by 11.7 in (210 by 297 mm) Executive 7.3 by 10.5 in...

  • Page 24

    Table 1-11. Paper Specifications, Optional 500-Sheet Universal Tray Supported Dimensions* Weight Capacity** Paper Letter 8.5 by 11 in (216 by 279 mm) 8.3 by 11.7 in (210 by 297 mm) Executive 7.3 by 10.5 in (191 by 267 mm) Executive JIS 8.5 by 13 in (custom ***) (216 by 330 mm)

  • Page 25: Supported Types Of Paper

    Table 1-12. Paper Specifications, Optional Envelope Feeder Supported Dimensions* Weight Capacity** Paper Minimum Size 3.5 by 6.3 in (90 by 160 mm) 20 to 28 lb 75 envelopes (75 to 105 g/m Maximum Size 7 by 10 in (178 by 254 mm) The printer supports a wide range of paper sizes.

  • Page 26: Guidelines For Using Paper

    Guidelines for Using Paper For best results, use conventional 20 lb (75 g/m ) paper. Make sure the paper is of good quality and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges. If you are unsure what type of paper you are loading (such as bond or recycled), check the label on the package of paper.

  • Page 27

    Note Do not use letterhead paper that is printed with low-temperature inks, such as those used in some types of thermography. Do not use raised letterhead. The printer uses heat and pressure to fuse Toner to the paper. Make sure that any colored paper or preprinted forms use inks that are compatible with the printer’s temperature (400°...

  • Page 28: Paper Weight Equivalence Table

    Paper Weight Equivalence Table Use this table to determine approximate equivalent points in weight specifications other than U.S. bond weight. For example, to determine the equivalent of 20 lb U.S. bond weight paper in U.S. cover weight, locate the bond weight (in the third row, first column) and scan across the row to the cover weight (in the third column).

  • Page 29: Labels

    Labels CAUTION To avoid damaging the printer, use only labels recommended for use in laser printers. If you have problems printing labels, use Tray 1 and open the Rear Output Bin. Never print on the same sheet of labels more than once. Label Construction When selecting labels, consider the quality of each component: Adhesives: The adhesive material should be stable at 400°...

  • Page 30: Envelopes

    Envelopes Envelope Construction Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes depends upon the quality of the envelopes. When selecting envelopes, consider the following components: Weight: The weight of the envelope paper should not exceed 28 lb (105 g/m ), or jamming may result.

  • Page 31: Envelopes With Double Side Seams

    Envelopes with Double Side Seams Some envelopes have vertical seams at both ends of the envelope, rather than diagonal seams. This style of envelope may be more likely to wrinkle. When using envelopes with double side seams, be sure the seam extends all the way to the corner of the envelope as illustrated below.

  • Page 32: Envelope Margins, Envelope Storage

    Envelope Margins The following table gives typical address margins for a Commercial #10 or DL envelope. Table 1-16. Envelope Margins Type of Address Top Margin Left Margin Return Address 0.6 in (15 mm) 0.6 in (15 mm) Delivery Address 2 in (51 mm) 3.5 in (89 mm) Note For the best print quality, position margins no closer than 0.6 in (15 mm)

  • Page 33: Card Stock And Heavy Paper

    Card Stock and Heavy Paper Many types of card stock can be printed from Tray 1, including index cards and postcards. Some types of card stock perform better than others because the construction is better suited for feeding through a laser printer.

  • Page 34: Safety Information

    Safety Information Laser Safety Statement The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. The printer is certified as a “Class 1”...

  • Page 35: Fcc Regulations

    Consult your dealer or an experienced radio/TV technician. Note Any changes or modifications to the printer that are not expressly approved by HP could void the user’s authority to operate this equipment. Use of a shielded interface cable is required to comply with the Class B limits of Part 15 of FCC rules.

  • Page 36: Laser Statement For Finland

    Laser Statement for Finland LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet 4000/4000 T/4000 N/4000 TN and 4050/4050 T/4050 N/4050 TN -laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen ulkopuolelle.

  • Page 37: Toner Safety

    (800) 231-9300. Use index number 7 for a listing of the Toner Cartridge/Drum Material/Chemical Safety Data Sheets. Note To get documents from HP FIRST by fax, you must use a Group 3 fax machine. Safety Information 1-27...

  • Page 38: Environmental Product Stewardship

    Environmental Product Stewardship Protecting the Environment Hewlett-Packard Company is committed to providing quality products in an environmentally-sound manner. The printer has been designed to minimize impacts on the environment. The printer design eliminates: Ozone The printer uses charging rollers in the electrophotographic process and Production therefore generates no appreciable ozone gas (0 CFC Usage...

  • Page 39

    Service Approach Overview This chapter discusses the following: Service Approach Parts and Supplies Warranty Statement Overview 2-1...

  • Page 40: Service Approach

    Service Approach Repair of the printer normally begins with use of the printer’s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs).

  • Page 41: Parts And Supplies

    Parts and Supplies Ordering Information Field replaceable and accessory part numbers are found in Chapter 8 of this manual. Replacement parts may be ordered from HP’s Service Materials Organization (SMO) or Support Materials Europe (SME), divisions of Product Support Division (PSD).

  • Page 42: Helpful Documentation

    5081-9469 CD-ROM printer hardware User’s Documentation Bundle, An additional copy of the user’s C4118-99051 HP LaserJet 4000 and 4000 N guide, the getting started guide, (English) Printers and the quick reference guide. User’s Documentation Bundle, An additional copy of the user’s...

  • Page 43

    An interactive training CD-ROM C4251-60106 for the for printer service HP LaserJet 4050 Printers representatives and customer care specialists. HP LaserJet 4000 and 4050 A combined service manual for C4251-91003 Series Printers Service Manual both series of printers. Parts and Supplies 2-5...

  • Page 44: Phone Numbers For Ordering, Exchange Program

    This powerful, CD-ROM-based parts information tool is designed to give users fast, easy access to parts information such as pricing and recommended stocking lists for a wide range of HP products. To subscribe to this quarterly service in the U.S. or Canada, call (800) 336-5987.

  • Page 45: Hp Support Assistant Compact Disc

    HP FIRST HP FIRST fax-on-demand service will deliver detailed troubleshooting information on common software and troubleshooting tips for your HP product. Call from any touch tone phone and request up to three documents per call. These documents will be sent to the fax of your choice.

  • Page 46: Customer Care Reseller Sales And Service Support Center

    You can reach this support center at 1-800-544-9976. Other Areas Outside of North America and Europe, contact your local HP sales office for assistance in obtaining technical support for resellers and service technicians.

  • Page 47: Toner Cartridge Information

    Plastics and other materials are recycled. HP pays the shipping costs from the user to the recycling plant. For each cartridge returned, HP donates one U.S. dollar to be shared by the Nature Conservancy and the National Wildlife Federation. To join this recycling effort, follow the instructions inside the Toner Cartridge’s...

  • Page 48: Warranty Statement

    Warranty Statement The warranty for this product gives you specific legal rights. There may also be other rights that vary from area to area. Refer to the user’s documentation for the full warranty and supporting warranty information. 2-10 Service Approach...

  • Page 49

    Printer Operation Overview This chapter discusses the following: Using the Control Panel Control Panel Menus Service Mode Testing the Printer Resetting the Printer System Configuration Printer I/O Configuration Overview 3-1...

  • Page 50: Using The Control Panel

    Using the Control Panel Control Panel Layout The printer’s Control Panel consists of the following: READY 2-line display Menu Ready Item Data 4050 only – Value + Attention Cancel Select Figure 3-1 Control Panel Layout Control Panel Lights Table 3-1. Control Panel Lights Light Indication Ready...

  • Page 51: Control Panel Keys

    Control Panel Keys Table 3-2. Control Panel Keys Function [Go] Places the printer either online or offline. Prints any data residing in the printer’s buffer. Allows the printer to resume printing after being offline. Clears most printer messages and places the printer online. Allows the printer to continue printing with an error message TRAY X LOAD [TYPE] [SIZE] UNEXPECTED...

  • Page 52: Settings And Defaults

    Settings and Defaults The printer makes most printing decisions based on either temporary settings or permanent defaults. Note Settings sent from software applications override printer defaults. Table 3-3. Settings and Defaults Setting or Default Explanation Temporary Setting A value set for the current print job by the software application. For example, a request from the software to print three copies instead of the Control Panel default value of one copy is a temporary setting.

  • Page 53: Control Panel Menus

    Control Panel Menus Press [Menu] for access to all Control Panel menus. When additional trays or other accessories are installed in the printer, new menu items automatically appear. To change a Control Panel setting: Press [Menu] until the desired menu appears. Press [Item] until the desired item appears.

  • Page 54: Quick Copy Jobs Menu

    Quick Copy Jobs Menu This menu provides a list of the quick copy jobs stored on the printer’s hard disk. The user can print or delete these jobs from the Control Panel. Note If there are no quick copy jobs stored on the printer’s hard disk, this menu is not displayed on the Control Panel.

  • Page 55: Private/stored Jobs Menu

    Private/Stored Jobs Menu This menu provides a list of the private and stored jobs on the printer’s hard disk. The user can print or delete these jobs from the Control Panel. Note If there are no private or stored jobs on the printer’s hard disk, this menu is not displayed on the Control Panel.

  • Page 56: Information Menu

    Control Panel menu items. PRINT The Configuration Page shows the printer’s current configuration. CONFIGURATION If an HP JetDirect print server card is installed (HP LaserJet 4000 N/4000 TN and 4050 N/4050 TN printers), a JetDirect Configuration Page will print out as well. PRINT...

  • Page 57: Paper Handling Menu

    Paper Handling Menu When paper handling settings are correctly configured through the Control Panel, you can print by choosing the type and size of paper from the printer driver or software application. Some items in this menu (such as duplex and manual feed) can be accessed from a software application, or from the printer driver (if the appropriate driver is installed).

  • Page 58

    This item appears only when a fourth PLAIN see page 1-12. paper tray is installed (available only on the HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN printers). Set the value to correspond with the paper type currently loaded in Tray 4.

  • Page 59

    Table 3-7. Paper Handling Menu (continued) Item Values Explanation OVERRIDE A4/ Choose to print on letter size LETTER=NO paper when an A4 job is sent, but no A4 size paper is loaded in the printer (or to print on A4 size paper when a letter job is sent, but no letter paper is loaded in the printer).

  • Page 60: Print Quality Menu

    PRORES 1200 : Produces optimum print quality (true 1200 dpi) at half the printer’s maximum speed (8 ppm for the HP LaserJet 4000 printer, or at highest print quality at engine speed for the HP LaserJet 4050 printer). When the resolution is changed,...

  • Page 61

    Toner on the printed page by up to 50%. Caution HP does not recommend full-time use of EconoMode. (If EconoMode is used full-time, it is possible that the Toner supply will outlast the mechanical parts in the Toner cartridge.)

  • Page 62

    Table 3-8. Print Quality Menu (continued) Item Values Explanation TONER DENSITY=3 Lighten or darken the print on the page by changing the Toner density setting. The settings range from 1 (light) to 5 (dark), but the default setting of 3 usually produces the best results.

  • Page 63: Printing Menu

    Printing Menu Some items in this menu can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override Control Panel settings. Table 3-9. Printing Menu Item Values Explanation COPIES=1...

  • Page 64

    Table 3-9. Printing Menu (continued) Item Values Explanation UNIT OF MEASURE= INCHES This item appears only when INCHES CONFIGURE CUSTOM MILLIMETERS PAPER=YES (110V printers) . Select the unit of measurement for the custom MILLIMETERS paper size. (220V printers) X DIMENSION= 3.00 TO 8.5 INCHES This item appears only when 8.5 INCHES...

  • Page 65

    Table 3-9. Printing Menu (continued) Item Values Explanation INTERNAL PCL FONT INTERNAL : Internal fonts. SOFT SOURCE=INTERNAL SOFT : Permanent soft fonts. SLOT 1 SLOT 1, 2, OR 3 , or : Fonts stored in one of the three DIMM slots. Note It is best to set the font source from the printer driver or...

  • Page 66

    : The internal Courier font available on the HP LaserJet 4 series printers. DARK : The internal Courier font available on the HP LaserJet III series printers. Both fonts are not available at the same time. WIDE A4=NO The Wide A4 setting changes...

  • Page 67

    Table 3-9. Printing Menu (continued) Item Values Explanation APPEND CR TO LF= Select to append a carriage return to each line feed encountered in backward-compatible PCL jobs (pure text, no job control). Some environments, such as UNIX, indicate a new line using only the line feed control code.

  • Page 68: Configuration Menu

    Configuration Menu Items in this menu affect the printer’s behavior. Configure the printer according to your printing needs. Table 3-10. Configuration Menu Item Values Explanation POWERSAVE= Set the printer to enter PowerSave after it 30 MINUTES 15 MINUTES has been idle for a specified amount of time. 30 MINUTES Turning PowerSave off is not recommended.

  • Page 69

    Table 3-10. Configuration Menu (continued) Item Values Explanation RESOURCE SAVE= Dedicate printer memory to save each language’s permanent resources. (You AUTO might need to add memory to the printer in order for this item to appear.) The amount of memory set aside can be different for each installed language.

  • Page 70

    Table 3-10. Configuration Menu (continued) Item Values Explanation 21 PAGE PAGE PROTECT= AUTO This item appears only after a TOO COMPLEX, PRESS GO TO AUTO CONTINUE message displays. Memory Enhancement technology (MEt) attempts to guarantee that all pages will PAGE print.

  • Page 71

    Table 3-10. Configuration Menu (continued) Item Values Explanation TONER CONTINUE Determine how the printer behaves when TONER LOW LOW=CONTINUE STOP Toner is low. The message will first appear when the Toner Cartridge is almost out of Toner. (About 100 to 300 sheets can still be printed.) CONTINUE : The printer will continue to print...

  • Page 72

    Table 3-10. Configuration Menu (continued) Item Values Explanation JAM RECOVERY= AUTO Determine how the printer behaves when a AUTO paper jam occurs. AUTO : The printer automatically selects the best mode for printer jam recovery (usually AUTO ). This is the default setting. : The printer automatically reprints pages after a paper jam is cleared.

  • Page 73

    Explanation QUICK COPY Specifies the number of quick copy jobs that JOBS = 32 can be stored on the printer’s hard disk. (HP LaserJet 4050 series printer with hard disk installed only) HELD JOB 1 HOUR This setting allows the user to set the...

  • Page 74: I/o Menu

    I/O Menu Items in the I/O (input/output) Menu affect the communication between the printer and the computer. Table 3-11. I/O Menu Item Values Explanation I/O TIMEOUT=15 Select the I/O timeout period in seconds. (I/O timeout refers to the time, measured in seconds, that the printer waits before ending a print job.) This setting allows you to adjust timeout for best performance.

  • Page 75

    Table 3-11. I/O Menu (continued) Item Values Explanation PARALLEL HIGH Select the speed at which data is transmitted to SPEED=YES the printer. : The printer accepts faster parallel communications used for connections with newer computers. : The printer accepts slower parallel communications used for connections with older computers.

  • Page 76

    Table 3-11. I/O Menu (continued) Item Values Explanation SERIAL SERIAL ROBUST This item appears only when PACING=XON/XOFF XON=ON . Select the method for generating XONs. : The printer sends an XON when the printer is online and when sufficient buffer space is available.

  • Page 77: Eio Menu (networked Printers), Eio Menu (networked Printers)

    EIO (enhanced input/output) Menus depend on the particular accessory product installed in an EIO slot of the printer. If the printer contains an HP JetDirect print server EIO card, you can configure basic networking parameters using the EIO Menu. These and other parameters can also be configured through HP JetAdmin.

  • Page 78

    Also, you can manually set the Timeout time period. Note If no IP address is assigned within the first 5 minutes, the HP JetDirect print server card will assume a default IP address of 192.0.0.192. CFG ETALK=NO : The EtherTalk Menu is not accessible.

  • Page 79: Resets Menu

    [Cancel Job] clears only the current job. Note Job retention features will be deleted if you do not have the hard disk accessory. (HP LaserJet 4050 series printer only.) Table 3-13. Resets Menu Item Explanation RESET MEMORY This item clears the printer buffer and the active I/O input buffer, and makes the Control Panel defaults current.

  • Page 80: Service Mode

    Service Mode Service Mode should be used only by authorized service personnel. While in Service Mode, you can: Verify and set the page count and serial number. These are displayed on the Configuration Page. Set the Cold Reset Default. (This sets the factory default paper size to either Letter or A4).

  • Page 81: Service Menu

    Service Menu Figure 3-2 Service Menu Setting the Page Count, Maintenance Count, and Serial Number The page count and printer serial number are stored in non-volatile memory. If it is necessary to replace the Formatter PCA, the page count should be set to the current value to reflect the age of the Print Engine.

  • Page 82: Page Count

    Page Count The page count stored in NVRAM and displayed on the Configuration Page printout represents the number of pages which the printer has printed (excluding engine test prints). If it becomes necessary to repair a printer by installing a new Formatter, the page count must be reset so that it represents the age of the printer’s engine rather than the age of the Formatter.

  • Page 83: Maintenance Page Count

    Table 3-14. Changing the Page Count (continued) Key Press Display Description PAGES=0 0000 [Select] Advance the cursor one digit to the right. PAGES=00 0000 * [Value +] Increase the value of the third digit by one. PAGES=0 000 * [Select] Enter the change to the third digit and advance the cursor one digit to the right.

  • Page 84: Cold Reset Paper, Serial Number

    MAINTENANCE COUNT in the Service Mode Menu sets the page count interval at which the next service is due for the printer. This is set initially at the factory to 200,000 pages. (For example, the message displays at 200,000 pages. If the Printer Maintenance Kit is installed at 200,114 pages, the message displays 200,000 pages later, at PAGES 400,114 pages.) Editing this number is similar to editing the...

  • Page 85: Testing The Printer

    Testing the Printer When you print a Configuration Page, the printer checks its internal controller and I/O interface, and then prints a test page. You can review the Configuration Page printout to verify proper installation of such options as paper trays or printer languages. For more information, see page 7-52.

  • Page 86: Resetting The Printer

    Cold reset clears all data from the printer memory and sets all the defaults back to the factory settings. CAUTION Performing a Cold Reset resets the HP JetDirect configuration. To avoid making changes to your configuration, remove the HP JetDirect card before performing a cold reset.

  • Page 87: System Configuration, Ms-dos System Configuration

    System Configuration MS-DOS System Configuration To communicate properly with the printer, the MS-DOS environment requires the addition or modification of MODE commands in the AUTOEXEC.BAT file. Add or modify the MODE command(s), depending on the interface configuration, as follows: Parallel DOS Commands Most IBM and AT compatible computers default to a parallel printer port.

  • Page 88: Serial Ms-dos Commands

    Serial MS-DOS Commands Most IBM compatible computers default to a parallel printer port. To ensure that information is sent to the serial printer port, type the following MS-DOS commands at the MS-DOS prompt, or include them in the AUTOEXEC.BAT file. MODE COM1: 9600, N, 8, 1, P MODE LPT1: =COM1 For MS-DOS version 4.0 or above, enter:...

  • Page 89: Printer I/o Configuration, Parallel Menu, Serial Configuration

    The default setting . This default setting ( ) must be active in order to use ® HP LaserJet Explorer, the Windows Printing System, and other software applications and drivers. Serial Configuration Use RS-232C serial configuration when the printer is located 11 to 50 feet (3.35 to 15.24 meters) from the computer.

  • Page 90

    Pacing (Handshaking) Pacing (or “handshaking”) is a type of communication between the printer and the computer. This is an important setting in the printer because it allows the printer to tell the computer when to send information. If the printer is unable to receive information, for example, when the print buffer is full or when the printer is out of paper, a signal is sent to the computer to stop sending information.

  • Page 91

    Printer Maintenance Overview This chapter discusses the following: Cleaning the Printer and Accessories Preventative Maintenance Overview 4-1...

  • Page 92: Cleaning The Printer And Accessories

    Cleaning the Printer and Accessories To maintain high print quality and performance, thoroughly clean the printer and the paper handling accessories: Every time you change the Toner Cartridge (run a cleaning page). After printing approximately 10,000 pages. Whenever print quality problems occur. Clean the outside surfaces with a lightly water-dampened cloth.

  • Page 93

    Table 4-1. Cleaning the Printer Component Cleaning Method / Notes Outside Covers Use a water-dampened cloth. Do not use solvents or ammonia-based cleaners. Inside General With a dry lint-free cloth, wipe any dust, spilled Toner, and paper particles from the paper path area, the Registration Roller, and the Toner Cartridge cavity.

  • Page 94: Cleaning Spilled Toner

    Using the Printer Cleaning Page If Toner specks appear on the front or back side of your print jobs, follow the procedure below. From the printer’s Control Panel, do the following: PRINT QUALITY MENU Press [Menu] until appears. CREATE CLEANING PAGE Press [Item] until...

  • Page 95: Preventative Maintenance, Reset Maintenance Count

    Preventative Maintenance The preventative maintenance cycle for this printer is every 200,000 pages. To order the maintenance kit see page 8-2. The kit contains the following replacement parts: One Fuser One Transfer Roller One Tray 1 Roller Three Feed Rollers Three Separation Rollers Refer to the instructions included in the kit for detailed replacement procedures.

  • Page 96: Expected Life Of Components

    Expected Life of Components The following table shows the expected life of certain components in the printer. To order parts, see Chapter 8. Table 4-2. Life of Components for the HP LaserJet 4000 and 4050 Series Printer Part name Part No.

  • Page 97

    Functional Information Overview This chapter presents a generalized functional overview of the printer and the printing processes. This chapter discusses the following printer systems: Power Supply System Engine Controller System Formatter System Image Formation System Paper Feed System Basic Sequence of Operation Overview 5-1...

  • Page 98: Power Supply System, Ac/dc Power Distribution

    Power Supply System AC/DC Power Distribution AC power is supplied to the low-voltage power supply circuit in the Engine Controller Board when the power switch (SW1) is turned on. The low-voltage power supply circuit supplies +24 VDC and +3.3 VDC required for the printer. +24 VDC is supplied to drive the main motor, scanner motor and fan, and to the high-voltage power supply.

  • Page 99: Overcurrent Overvoltage Protection

    Overcurrent Overvoltage Protection The Fusing Heater Safety Circuit is located on the Engine Controller Board, and constantly monitors the fusing temperature. In case of abnormality, the output from this circuit turns off the relay (RL101) and interrupts the power to the fusing heater. If an increase in the temperature of the Fusing Heater causes the Thermistor Output voltage to exceed about 1.2V (240°...

  • Page 100: High-voltage Power Distribution

    High-voltage Power Distribution Figure 5-2 Engine Controller Board In response to the instructions from the microprocessor (CPU:IC 501) on the Engine Controller Board, this circuit applies the superimposed voltage of DC voltage and AC voltage to the primary charging roller and Developing Cylinder, and a positive or negative DC voltage to the transfer charging roller.

  • Page 101: Toner Cartridge Detection

    Toner Cartridge Detection The Toner Cartridge has a Toner sensor. The circuit compares the output value of the developing AC bias and the output value from the antenna inside the Cartridge, and outputs the Toner detection signal. The CPU detects the remaining Toner level and the presence of the Cartridge when the developing bias is applied to the Developing Cylinder.

  • Page 102: Engine Controller System

    Engine Controller System The following systems and functions are controlled by the engine controller board: DC power distribution (+3.3V DC, +5V DC, +24VA) Laser and scanner drive Paper motion monitoring and control (photosensors and flags) Clutches (tray pickup and Tray 1 feed) Engine Test Motors (main drive, scanner, and fans) The operation sequences of this printer are controlled by the CPU of...

  • Page 103

    Figure 5-3 Engine Controller Board Engine Controller System 5-7...

  • Page 104: Engine Controller Board Inputs And Outputs

    Engine Controller Board Inputs and Outputs Figure 5-4 Engine Controller Board I/O (1 of 4) 5-8 Functional Information...

  • Page 105

    Figure 5-5 Engine Controller Board I/O (2 of 4) Engine Controller System 5-9...

  • Page 106

    Figure 5-6 Engine Controller Board I/O (3 of 4) 5-10 Functional Information...

  • Page 107

    Figure 5-7 Engine Controller Board I/O (4 of 4) Engine Controller System 5-11...

  • Page 108: Laser And Scanner Drive, Paper Motion Monitoring And Control, Solenoids, Sensors, Clutches, And Switches

    Laser and Scanner Drive Based on information received from the Formatter, the Engine Controller Board sends signals to the Laser Scanner Assembly to modulate the Laser Diode on and off and to drive the Laser Scanner motor. See “Image Formation System” on page 5-22 for more information.

  • Page 109: Motors

    The CPU (IC501) sets the Main Motor Drive signal (/MON) to “L” and rotates the Main Motor. When the HP LaserJet 4000 series printer is printing at 1200 dpi, the CPU sets the main motor rotation switching signal (/HALF) to “L” and decreases the rotation speed of the Main Motor to half.

  • Page 110

    The Scanner Motor is controlled and monitored by the Engine Controller Board. It rotates the Scanner Mirror during the initial rotation period and the print period. The Fan Motor is controlled and monitored by the Engine Controller Board. The fan operates at full speed during the printing modes. The Fan turns off in PowerSave mode after the Fuser cools down.

  • Page 111: Formatter System

    The Formatter PCA also provides the electrical interface and mounting locations for two EIO cards, additional memory DIMMs, and the Hard Disk accessory, and the HP Fast InfraRed Receiver (HP LaserJet 4050 series printer only). PowerSave This feature (accessed from the Configuration Menu) conserves power by shutting down the Fuser and Exhaust Fans after the printer has been idle for an adjustable period of time.

  • Page 112: Resolution Enhancement Technology (ret), Resolution Enhancement Technology (ret)

    Note Printer error messages override the PowerSave message. The printer will enter PowerSave mode at the appropriate time, but the error message will continue to be displayed. Resolution Enhancement technology (REt) The Formatter PCA contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the Engine Controller Board to produce “smoothed”...

  • Page 113: Input/output

    Formatter PCA. It provides automatic I/O switching between multiple computers or networks connected to the printer. The network versions for the HP LaserJet 4000 series printers include LocalTalk and the HP JetDirect Multi-protocol Network Card with Ethernet/10Base-T and 10Base-2. The network versions for the HP LaserJet 4050 series printers include the HP JetDirect Print Server with 10/100 Base TX.

  • Page 114: Printer Memory

    LocalTalk hardware. The LocalTalk network cable (HP P/N 92215N) is connected through the EIO card. The LocalTalk hardware is an optional feature for the HP LaserJet 4000, 4000 T, and 4050 series printers. The LocalTalk hardware is bundled with the HP LaserJet 4000 N/TN printers.

  • Page 115: Random Access Memory (ram), Random Access Memory (ram), Dimm Slots

    Random Access Memory (RAM) The RAM contains the page and I/O buffers and the font storage area. It stores printing and font information received from the host system, and can also serve to temporarily store a full page of print image data before the data is sent to the print engine (see “Page Protect”...

  • Page 116: Page Protect, Pjl Overview

    Page Protect Page complexity (rules, complex graphics, or dense text) may exceed the printer’s ability to create the page image fast enough to keep pace with the image formation process. If Page Protect is disabled, and a page is too complex, it may print in parts (for example, the top half on one page and the bottom half on the next page).

  • Page 117: Control Panel

    PML is a Printer Management Language that allows remote configuration and status readback through the I/O ports. Control Panel The Formatter PCA sends and receives printer status and command data via a Control Panel PCA. See “Using the Control Panel” on page 3-2, and “Printer Messages”...

  • Page 118: Image Formation System

    Image Formation System The image formation system is the main system in the printer. It consists of six stages: 1. Cleaning 4. Developing 2. Conditioning 5. Transferring 3. Writing 6. Fusing When the Formatter Board sends the print signal to the Engine Controller Board, it drives the Main Motor to rotate the Photosensitive Drum, the Developing Cylinder, the Primary Charging Roller, and the Transfer Charging Roller.

  • Page 119

    Figure 5-9 Image Formation System After the image has been transferred to the paper, it is then fused onto the paper by heat and pressure at the Fuser. Image Formation System 5-23...

  • Page 120: Toner Cartridge

    Toner Cartridge Figure 5-10 Toner Cartridge A major portion of the Image Formation System is contained in the Cartridge as shown in the figure above. The Toner Cartridge is the “heart” of the Image Formation System. It houses the cleaning, conditioning, and developing steps of the process.

  • Page 121: Photosensitive Drum

    Photosensitive Drum The special properties of the Photosensitive Drum allow an image to be formed on the Drum surface and then transferred to paper. The Drum is an aluminum cylinder. The outside of the cylinder is coated with a layer of organic-photoconductive material (OPC) which is non-toxic.

  • Page 122: Cleaning The Drum

    Cleaning the Drum The cleaning blade is in contact with the surface of the Drum at all times. As the Drum rotates during printing, excess Toner is stored in the waste Toner receptacle. Figure 5-12 Cleaning the Drum 5-26 Functional Information...

  • Page 123

    Conditioning the Drum After the Drum is cleaned, it must be conditioned. This process consists of applying a uniform negative charge on the surface of the Drum with the Primary Charging Roller. The Primary Charging Roller is coated with conductive rubber with an AC bias applied to erase any residual charges and maintain a constant Drum surface to create a uniform negative potential on the Drum surface.

  • Page 124: Writing The Image

    Writing the Image During the writing process, a modulated Laser Diode projects the beam onto the rotating six-sided Scanning Mirror. As the mirror rotates, the beam reflects off the mirror, through a set of focusing lenses, through a slot in the rear of the Toner Cartridge, and onto the Photosensitive Drum.

  • Page 125: Developing The Image

    Developing the Image The developing process develops the latent electrostatic image into a visible image on the Drum. The Developing Unit consists of a metallic cylinder that rotates around a fixed magnetic core inside the Toner cavity. Toner is a powdery substance made of black plastic resin bound to iron particles, which is uniformly attracted to the magnetic core of the cylinder.

  • Page 126: Transferring The Image

    Transferring the Image During the transferring process the Toner image on the Drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged Toner on the Drum surface to be attracted to the page. The small diameter of the Drum, combined with the stiffness of the paper, causes the paper to peel away from the Drum.

  • Page 127: Image Fusing/variable Fusing Temperature

    Image Fusing/Variable Fusing Temperature During the fusing process, the Toner is fused into the paper by heat and pressure to produce a permanent image. The paper passes between a heated Fusing Roller and a soft Pressure Roller. This melts the Toner and presses it into the paper. The Fusing Roller contains a ceramic heating element that provides heat for the fusing process.

  • Page 128

    Variable Fusing Temperature Figure 5-18 Fusing Temperature Control Variable fusing temperature is a feature that gives the user or service technician the ability to adjust the fusing temperature based on the media being used in the printer. The default mode is normal and should be optimal for most users.

  • Page 129: Paper Feed System

    Paper Feed System Figure 5-19 Paper Feed Subsystem Paper Feed System 5-33...

  • Page 130

    Both the size of the paper in the tray and the presence of a tray are detected by the three switches (SW600, 601, 602) on the Paper Size Detection PCA for the HP LaserJet 4000, 4000 N, 4050, and 4050 N, 5-34 Functional Information...

  • Page 131: Clutches And Sensors

    (SW600, 601, 602, 603, 604, 605) on the Paper Size Detection PCA for the HP LaserJet 4000 T, 4000 TN, 4050 T, and 4050 TN. While the Main Motor rotates, the Tray 1 Pickup Solenoid (SL102) is turned on, the Tray 1 Pickup Roller rotates, and a sheet of paper is fed into the printer.

  • Page 132: Printing From Tray 1

    Printing from Tray 1 The presence of paper in Tray 1 is detected by the Tray 1 Paper Sensor (PS105). When the Engine Controller Board receives the /PRNT signal from the Formatter, the printer starts the initial rotation phase. (This consists of Main Motor warm-up, Scanner Motor warm-up, high-voltage control sequence and Fuser warm-up.) When the initial rotation phase ends, the Tray 1 Pickup Solenoid (SL102) is turned on.

  • Page 133

    Figure 5-22 Tray 1 Pickup Paper Feed System 5-37...

  • Page 134: Printing From Tray 2

    Printing from Tray 2 When the Formatter inputs the /PRNT signal to the printer, the Main Motor (M1) starts rotation. When the Main Motor reaches its prescribed speed, the Feed Roller Clutch (CL101) and Tray 2 Pickup Solenoid (SL 101 or SL 103) are turned on. (The Tray 2 Pickup Roller, Tray 2 Feed Roller, Separation Roller, and Feed Rollers are driven by the Main Motor rotation.) The Tray 2 Pickup Roller, driven by the Pickup Solenoid, rotates once...

  • Page 135

    Figure 5-24 Tray 2 Pickup Paper Feed System 5-39...

  • Page 136

    Multi-Feed Prevention Mechanism When feeding paper from Tray 2, the printer uses the Separation Roller to prevent multi-feeding. Normally, the Separation Roller is imparted with a rotational force in the same direction as the Feed Roller. However, since the Separation Roller is equipped with a Torque Limiter, it rotates with Feed Roller 1 by transmission of its rotational force via the transported paper.

  • Page 137: Universal Tray

    Printing from the Optional 500-sheet Universal Tray The operation sequences of the Paper Feeder are controlled by the Paper Feeder Driver. A 4-bit microprocessor is used in the Paper Feeder Driver, which controls the sequences of the Paper Feeder and the serial communication with the Engine Controller Board.

  • Page 138

    Pickup and Feeding The Paper Feeder picks up the paper from the installed trays and feeds the paper to the printer. The flow of the paper is shown below. Figure 5-27 Paper Feed from Trays The paper size and the presence of the 500-sheet Tray are detected by three switches (SW801, 802, 803) on the Paper Feeder Driver PCA.

  • Page 139

    The CPU on the Engine Controller Board monitors the conditions of the PS102 for a prescribed period of time after the pickup starts. If the PS102 does not detect paper within that time interval, the CPU turns off the Feed Roller clutch (CL101) to stop the paper after the top of page sensor (PS103) detects the presence of the preceding page.

  • Page 140: Envelope Feeder

    Envelope Feeder The operation sequences of the Envelope Feeder are controlled by the Envelope Feeder Driver. A 4-bit microprocessor is used in the Envelope Feeder Driver, which controls the sequences of the Envelope Feeder and the serial communication with the Engine Controller Board of the printer.

  • Page 141

    is completed, the Envelope Feeder Driver PCA receives the pickup command from the Engine Controller Board and turns on the envelope pickup solenoid (SL901). The Pickup Roller, Feed Roller and Separation Roller are rotated sequentially by the Main Motor rotation, and an envelope is picked up. Then, any unnecessary envelopes are removed by the Separation Roller, and the envelope is fed to the printer.

  • Page 142: Duplexer

    Duplexer The operation sequences of the Duplexer are controlled by the Duplexer Driver. A 4-bit microprocessor is used in the Duplexer Driver, which controls the sequences of the Duplexer and the serial communication with the Engine Controller Board. The Duplexer Driver drives the Solenoid, Motors, and Fan according to commands sent from the Engine Controller Board to the Duplexer and Duplex Pickup command via serial communication.

  • Page 143

    Figure 5-31 Paper Path for the Duplexer Paper Feed System 5-47...

  • Page 144: Paper Jam

    Figure 5-32 Paper Feed for the Duplexer Paper Jam There are four photointerrupters (PS102, PS103, PS106, PS501) in the paper path for detecting the presence of the paper. If the paper does not reach or pass three sensors within the prescribed time, the microprocessor in the Engine Controller Board notifies the Formatter of a paper jam.

  • Page 145: Basic Sequence Of Operation

    Basic Sequence of Operation The Formatter PCA and the Engine Controller Board share information during printer operation. The Interface PCA forms a link which operates as a serial data bus. This allows printer status, command, and dot-image data to be passed between the two PCAs. Table 5-1 shows the general timing of the printer events.

  • Page 146

    Figure 5-33 Timing Diagram 5-50 Functional Information...

  • Page 147

    Removing and Replacing Parts Overview This chapter discusses the following: Removal and Replacement Strategy Removing Covers Removing Assemblies Separating the Engine Module from the Paper Feed Module Overview 6-1...

  • Page 148: Removal And Replacement Strategy

    Removal and Replacement Strategy This chapter describes the complete disassembly of the printer. In every instance, tasks that must be performed before beginning the procedure are listed first. Remove the assemblies in the order listed to prevent damage during re-assembly. To ensure optimum print quality, the printer will prompt to have routine maintenance performed every 200,000 pages.

  • Page 149: Tools

    Tools Phillips #2 magnetized screwdriver with 6-inch shaft Flat-blade screwdriver with 6-inch shaft Needle-nose pliers Penlight Screws Used in the Printer All screws used in the printer are Phillips head, which require a Phillips screwdriver. The following figure shows the difference between a Phillips and a Posidriv screwdriver.

  • Page 150

    Table 6-1. Screws Used in the Printer Drawing and Description Purpose Used to fasten metal to metal when good electrical contact is needed. Threaded Phillips with captive star washer Used to fasten metal or plastic to plastic mainframes. Silver Self-tapping Phillips screw Used to fasten metal or plastic to plastic mainframes.

  • Page 151

    Table 6-1. Screws Used in the Printer (continued) Drawing and Description Purpose Used to anchor Tray 1 Pickup Assembly (4.8 in/116 mm) Long screw Hint To insert self-tapping screws, turn the screw to the left (counter-clockwise) until it clicks, then turn it to the right (clockwise) until it is seated.

  • Page 152: Removing Covers, Rear Right Side Cover

    Removing Covers It is usually best to remove and replace the covers in the order shown. Turn the printer off and unplug the power cord and any cables. Hint Left and right are indicated as you face the front of the printer unless otherwise noted.

  • Page 153: Top Cover

    Top Cover Open the Top Cover and remove the Toner Cartridge. CAUTION To prevent damage to the Toner Cartridge, do not expose it to light for more than a few minutes. To remove the Top Cover, you must remove the Rear Right Side Cover (page 6-6), the Toner Cartridge Drive Arm (page 6-9), the Control Panel Overlay (below) and the Control Panel (page 6-8).

  • Page 154

    Control Panel Figure 6-4 Removing the Control Panel Using a flat-blade screwdriver, pry each side of the Control Panel upward. Remove the top of the Control Panel from the tab. Disconnect the ribbon cable from the Control Panel. 6-8 Removing and Replacing Parts...

  • Page 155

    Toner Cartridge Drive Arm Figure 6-5 Removing the Toner Cartridge Drive Arm Remove the Toner Cartridge Drive Arm by using needle-nose pliers to pinch the pin from its hinge on the Top Cover. Note Be sure to reconnect the Toner Cartridge Drive Arm when you replace the Top Cover, or the Toner Cartridge will not seat properly.

  • Page 156

    Toner cartridge drive arm Rear screws Top screws Figure 6-6 Removing the Top Cover Remove the four screws holding the Top Cover (two are behind the Rear Output Bin, near the top, and two are on top of the printer under the Top Cover). 6-10 Removing and Replacing Parts...

  • Page 157

    Release tab if necessary Figure 6-7 Releasing tabs to lift the Top Cover Squeeze the right front side of the Top Cover to remove it. It may be necessary to use a small flat-blade screwdriver to release the tab inside the small hole. Holding the output assembly in place (located toward the rear of the printer), remove the Top Cover.

  • Page 158: Left Side Cover

    Left Side Cover Catches Latch (inside) Figure 6-8 Removing the Left Side Cover Open Tray 1. Release the latch on the left side cover from the inside of the printer. Release the catches on the front side of the cover. Lift the cover upward to release the front top side of the cover, then pull the cover away from the printer.

  • Page 159: Front Right Side Cover

    Front Right Side Cover Latch Figure 6-9 Removing the Front Right Side Cover Release the latch at the top center of the cover. Lift the cover straight up until it is free of the tabs at the bottom and the power switch rod, then pull it away from the printer. Hint When you reinstall the Front Right Side Cover, be sure to reconnect the power switch rod.

  • Page 160: Rear Cover/rear Output Bin

    Rear Cover/Rear Output Bin Step 2 Step 1 Figure 6-10 Removing the Rear Cover/Rear Output Bin Facing the rear of the printer, pinch the right side of the Rear Output Bin and release the hinge from the slot. Rotate the bin upward and slide it to the right to release the left hinge.

  • Page 161

    Tray 1 Figure 6-11 Removing Tray 1 from the Front Cover Open Tray 1. Push outward on the two slot hinges to release the pins on Tray 1. Slide the Front Cover to the right and remove it from the three hinges on the bottom.

  • Page 162

    Figure 6-12 Removing the Tray 1 Sensor Arm Cover Firmly pull both sides of the Tray 1 Sensor Arm Cover toward you until it releases from the shaft. See Figure 6-13, “Detail of the Tray 1 Sensor Arm Cover,” on page 6-17. Rotate Tray 1 downward and remove it from the two hinges.

  • Page 163

    Figure 6-13 Detail of the Tray 1 Sensor Arm Cover Hint When you reinstall the Tray 1 Sensor Arm Cover be sure the Sensor Arms move freely. Removing Covers 6-17...

  • Page 164: Removing Assemblies

    Removing Assemblies The order in which you replace the following assemblies depends on the part needing to be replaced. It is not necessary to remove every assembly. Fuser WARNING! Let the Fuser Assembly cool before disassembly. Remove the Rear Cover/Rear Output Bin (page 6-14). Figure 6-14 Removing the Left and Right Duplex Connector Covers If a Duplexer is installed, remove it.

  • Page 165

    Figure 6-15 Loosening the captive screws in the Fuser Assembly Loosen the two captive screws on the Fuser Assembly. Pull the Fuser Assembly straight out of the printer. Removing Assemblies 6-19...

  • Page 166: Formatter Cage Assembly

    Formatter Cage Assembly For accessing DIMMs accessory Figure 6-16 Removing the Formatter Cage Assembly Print a Configuration Page. The information is necessary to reconfigure the printer after you replace the Formatter. Remove the rear right side cover (page 6-6). The Formatter Cage Assembly is directly underneath.

  • Page 167: Output Assembly

    Output Assembly White tab Brass arm Figure 6-17 Removing the Output Assembly Remove the Top Cover (page 6-7). The Output Assembly is on the top, rear of the printer. Removing Assemblies 6-21...

  • Page 168

    Facing the rear of the printer, release the 2 latches as follows: Figure 6-18 Left end of Output Assembly (brass arm) ° . a On the left end of the assembly, rotate the brass arm up 90 Figure 6-19 Right end of Output Assembly (white tab) b On the right end of the assembly, release the white tab.

  • Page 169: Laser Scanner

    Laser Scanner Shutter interlock and plate Figure 6-20 Removing the Laser Scanner Remove the Top Cover (page 6-7). The Laser Scanner is on the top of the printer, tilted toward the rear, and has a yellow label on Unplug the 3 connectors as shown. Remove the 4 black screws around the edges of the Laser Scanner.

  • Page 170

    Figure 6-21 Removing the Fan Remove the Top Cover (page 6-7) and the Left Side Cover (page 6-12). The Fan is on the left side of the printer. Unplug the Fan’s connector to the Engine Controller Board. Squeeze the latches on the left and right sides of the Fan cover. Pull the Fan straight out.

  • Page 171: Main Motor

    Main Motor Figure 6-22 Removing the Main Motor Remove the Top Cover (page 6-7) and the Front Right Side Cover (page 6-13). The Main Motor is on the right front side of the printer. Unplug the connector. Remove the 4 silver screws around the corners of the metal plate. Remove the Main Motor from the printer.

  • Page 172: Transfer Roller

    Transfer Roller DO NOT TOUCH! (See Hint) Figure 6-23 Removing the Transfer Roller Open the Top Cover and remove the Toner Cartridge. The Transfer Roller is underneath the Toner Cartridge. CAUTION Do not touch the black rubber part of the roller. Skin oils on the roller can cause problems with print quality.

  • Page 173: Tray 1 Pickup Roller

    Tray 1 Pickup Roller Figure 6-24 Removing the Pickup Roller (shown with Envelope Entrance Cover removed) Open Tray 1. The Tray 1 Pickup Roller is in the center of the Tray 1 Pickup Assembly. Grasp the Envelope Entrance Cover and pull it straight away from the printer.

  • Page 174

    Figure 6-25 Detail of the Tray 1 Pickup Roller 6-28 Removing and Replacing Parts...

  • Page 175: Tray 1 Pickup Assembly

    Tray 1 Pickup Assembly Remove the covers (starting on page 6-6): Top Cover, Left Side Cover, Front Right Side Cover, and Tray 1. The Tray 1 Pickup Assembly is on the front of the printer. Envelope feeder gear cover Step 4b Envelope feeder connector...

  • Page 176

    Figure 6-27 Removing the Tray 1 Pickup Assembly – Right Side Disconnect the solenoid cable on the right side of the Tray 1 Pickup Assembly. (Note the way the cables are routed for replacement.) 6-30 Removing and Replacing Parts...

  • Page 177

    Step 7 Step 8 Step 6 Figure 6-28 Removing the Tray 1 Pickup Assembly – Left Side Unplug the connector to the Engine Controller Board on the left side of the Tray 1 Pickup Assembly. Remove the long screw (4.8 in/116 mm) from the left side of the assembly.

  • Page 178

    Toner cartridge guide Figure 6-29 Removing the Tray 1 Pickup Assembly – Front Side Remove the 3 screws shown. 10 Lift the black Toner Cartridge Guide on the right side of the assembly and pull the assembly straight out of the printer. See page 6-33 for the procedure.

  • Page 179: Right Side Toner Cartridge Guide

    Right Side Toner Cartridge Guide You can lift aside the Right Side Toner Cartridge Guide (instead of removing it) to access the Registration Assembly. It is not necessary to unplug the connectors. Remove the Right Side Toner Cartridge Guide to access the Gear Train.

  • Page 180: Registration Assembly

    Registration Assembly Figure 6-31 Removing the Registration Assembly Remove the following covers (starting on page 6-6): Top Cover, Left Side Cover, Front Right Side Cover, and Tray 1. Remove the Tray 1 pickup assembly (page 6-29). The Right Side Toner Cartridge Guide can be lifted without removal (page 6-33).

  • Page 181

    DO NOT REMOVE! Figure 6-32 Detail of screws for the Registration Assembly CAUTION Do not remove the silver screw closest to the Registration Assembly! It holds the spring in place. Take out the silver screw farther from the registration assembly, the one that is under the green handle. Lift the green handle.

  • Page 182: Paper Feed Assembly

    Paper Feed Assembly Remove the following covers (starting on page 6-6): Top Cover, Left Side Cover, Front Right Side Cover, and Tray 1. Remove the Tray 1 Pickup Assembly (page 6-29). The Paper Feed Assembly is on the front of the printer. Note routing Figure 6-33...

  • Page 183

    Figure 6-34 Removing the upper screws from the Paper Feed Assembly Remove the 2 black upper screws. Hint After replacing the Paper Feed Assembly, make sure to insert the 2 upper screws only. The 2 lower screws are for holding the Tray 1 Pickup Assembly in place.

  • Page 184

    Hint For replacement of the Paper Feed Assembly, orient the clutch properly by inserting it into the slot, as shown. Figure 6-35 Detail of the Paper Feed Clutch 6-38 Removing and Replacing Parts...

  • Page 185: Formatter Pan

    Formatter Pan Figure 6-36 Removing the Formatter Pan Remove the Top Cover (page 6-7) and the Front Right Side Cover (page 6-13). Remove the Formatter Cage Assembly (page 6-20). The Formatter Pan is on the right rear side. Remove the Formatter Pan in order to split the engine from the tray assembly or to access the Gear Train.

  • Page 186: Gear Train

    Gear Train Toner Cartridge Drive Arm Step 4 Figure 6-37 Removing the Gear Train Remove the following covers (starting on page 6-6): Top Cover, Front Right Side Cover, Rear Cover/Rear Output Bin, and Tray 1. Remove the Right Side Toner Cartridge Guide (page 6-33), the Registration Assembly (page 6-34), the Formatter Cage Assembly (page 6-20), and the Formatter Pan (page 6-39).

  • Page 187: Delivery Drive Assembly

    Delivery Drive Assembly Figure 6-38 Removing the Delivery Drive Assembly Remove the covers (starting on page 6-6): Top Cover, Left Side Cover, Front Right Side Cover, Rear Cover/Rear Output Bin, and Tray 1. Remove the Output Assembly (page 6-21), Formatter Cage Assembly (page 6-20), Formatter Pan (page 6-39), and Fuser Assembly (page 6-18).

  • Page 188: Separating The Engine Module From The Paper Feed Module

    Separating the Engine Module from the Paper Feed Module This procedure is the same for printers with a single 500-sheet Tray or two 250-sheet Trays. Remove the Rear Right Side cover (page 6-6). Remove the Formatter Cage Assembly (page 6-20), Formatter Pan (page 6-39), and 2 long screws from the Tray 1 Pickup Assembly (See Figure 6-26 on page 6-29 and Figure 6-28 on page 6-31).

  • Page 189

    Figure 6-40 Separating the Engine from the Paper Feed Module Remove the single black, self-tapping screw from the left side of the printer, below the Fan. CAUTION Lift the Engine carefully, being sure that all cables are disconnected. Lift the Engine away from the Paper Feed Module. Separating the Engine Module from the Paper Feed Module 6-43...

  • Page 190: Engine Controller Board

    Engine Controller Board Note After you replace the Engine Controller Board, do not forget to readjust the top margin as described on page 6-46. Separate the Engine from the Paper Feed Module (page 6-42). The Engine Controller Board is on the underside of the Engine and contains the following: •...

  • Page 191

    Facing the front of the Engine Module: Remove 7 screws (shown in Figure 6-41 on page 6-44): • 4 black, self-tapping M4 screws (3 in front and 1 in the right rear) • From the left rear, 3 M3 screws (1 recessed) Disconnect the spring on the right side from the notch.

  • Page 192: Adjusting The Top Margin

    Adjusting the Top Margin When you replace the Engine Controller Board, you must readjust the top margin as follows: Figure 6-43 Location of VR501 After setting the VR501 on the Engine Controller Board to the center position (0), load letter or A4 paper in the tray. Press the Engine Test Print Button (located on the left side of the printer, below the vent) to make several test prints.

  • Page 193

    Measure this distance Figure 6-44 Adjusting the top margin Measure the distance between the edge of the paper and the print pattern. Measure all the test prints and calculate the average. Adjust VR501 so that the margin becomes .08 in (2 mm). Turn VR501 clockwise to decrease the margin or counter-clockwise to increase the margin.

  • Page 194: Paper Feed Rollers

    Paper Feed Rollers The following procedure is the same for all HP LaserJet 4000 and 4050 series printers; there are 2 Feed Rollers for the HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN and one Feed Roller for the HP LaserJet 4000/4000 N and 4050/4050 N printers.

  • Page 195: Separation Rollers

    Separation Rollers Figure 6-46 Removing the Separation Rollers The Separation Rollers are inside the paper trays. Release the latch and lift the cover inside the tray. Pinch the release at the left side of the Roller and slide it off the shaft.

  • Page 196: Paper Feed Module Plate

    Paper Feed Module Plate Remove the Paper Feed Module Plate to access the Controller PCA. This procedure is the same for one 500-sheet Tray or two 250-sheet Trays. (Small) Figure 6-47 Removing the Paper Feed Module Plate Remove the 7 black self-tapping screws (one of them is recessed in front).

  • Page 197: Paper Feed Module Gear Train Assembly

    Paper Feed Module Gear Train Assembly This procedure is the same for one 500-sheet Tray or two 250-sheet Trays. Unplug connector Figure 6-48 Removing the Gear Train Remove the long recessed screw shown. Unplug the connector (note routing). Lift the gear train upward, away from the Paper Feed Module. Separating the Engine Module from the Paper Feed Module 6-51...

  • Page 198: Paper Feed Module Side Rails

    Unplug (Long connector screw) Figure 6-49 Removing the Paper Feed Module side rails (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN shown) To remove the side rails, remove the 4 recessed screws (1 is long). Unplug the connector. Lift the side rails off of the Paper Feed Module.

  • Page 199

    Lower Paper Feed Module Plate (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Figure 6-50 Removing the lower Paper Feed Module Plate Remove 9 black self-tapping screws. Remove 2 small black M3 screws. Lift up the lower Paper Feed Module Plate to remove it.

  • Page 200

    PCA Cover (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Figure 6-51 Removing the PCA Cover (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Pinch the left and right sides of the PCA Cover to release it from the side latches.

  • Page 201: Pca Cover (hp Laserjet 4000/4000 N And 4050/4050 N)

    PCA Cover (HP LaserJet 4000/4000 N and 4050/4050 N) Figure 6-52 Removing the PCA Cover (HP LaserJet 4000/4000 N and 4050/4050 N) Release the latches shown. Remove the PCA Cover. Separating the Engine Module from the Paper Feed Module 6-55...

  • Page 202: Pca Controller

    PCA Controller This procedure is the same for one 500-sheet Tray or two 250-sheet Trays. Figure 6-53 Removing the PCA Controller Unplug 3 connectors to the PCA Controller. Unclip the left side of the PCA Controller and remove it. 6-56 Removing and Replacing Parts...

  • Page 203

    Troubleshooting Overview This chapter discusses the following: Troubleshooting Process Troubleshooting the Printing System Reference Diagrams Overview 7-1...

  • Page 204: Troubleshooting Process

    Troubleshooting Process The troubleshooting process is a systematic approach that addresses the major problems first, and then other problems as you identify the causes for printer malfunctions and errors. The “Troubleshooting Flowchart” on page 7-4 illustrates the major steps for troubleshooting the printing system.

  • Page 205

    Table 7-1. Major Steps for Troubleshooting (continued) General Paper Path Is there a paper jam in the printer? Troubleshooting (page 7-45) This section gives information about solving problems in the paper path. Information Pages Will the printer print information pages successfully? (page 7-48) This section gives the procedures for printing the information pages and evaluating and correcting the printer’s configuration.

  • Page 206: Troubleshooting Flowchart

    Troubleshooting Flowchart Figure 7-1 Troubleshooting Flowchart (1 of 2) 7-4 Troubleshooting...

  • Page 207: Troubleshooting Flowchart (continued), Troubleshooting Flowchart (continued)

    Troubleshooting Flowchart (Continued) Troubleshooting Flowchart, continued Troubleshooting Process 7-5...

  • Page 208: Troubleshooting The Printing System, Preliminary Operating Checks

    The printer is never exposed to ammonia fumes such as those produced by diazo copiers or office cleaning materials. The printer is not exposed to direct sunlight. Non-HP components (such as refilled Toner Cartridges, font cartridges, and memory boards) are removed from the printer. Note...

  • Page 209: Power On

    Power On Note It is important to have the printer’s Control Panel functional as soon as possible in the troubleshooting process so that the printer’s diagnostics can assist in locating printing errors. Table 7-2. Power On Defect or Blank Display Problem Action Is the power cord plugged...

  • Page 210

    Table 7-2. Power On Defect or Blank Display (continued) Problem Action Does the Fan turn on for Note: Fan operation is significant since the Fan is controlled by about 4 seconds when you the printer’s Engine Controller Board. An operational Fan first turn the printer on? indicates the following: 1.

  • Page 211

    Table 7-3. No AC Power Cause Action No correct voltage present at the outlet. Plug the power cord into another AC circuit outlet. Inform the customer that the correct line voltage is not available at the outlet. The power cord is not firmly plugged into the Insert the power plug firmly.

  • Page 212

    Table 7-4. No DC Power Cause Action No AC power is supplied. Check the AC power supply. See Table 7-3, “No AC Power,” on page 7-9 The overcurrent/overvoltage detection circuit If the problem is not rectified after the power activated. switch is turned off and on again, find the cause of activation of the overcurrent/overvoltage detection circuit in the...

  • Page 213: Engine Test

    Engine Test The printer has one test pattern (vertical lines). When an image defect appears, a test print can be made to identify the problem. The test print can be made by pressing the test print switch located on the left side of the printer (see Figure 7-2 on page 7-12).

  • Page 214: Display

    Figure 7-2 Location of the Engine Test Button Printing an Engine Test To print an engine test, use a non-metallic object (such as a pencil) to press the engine test button. A single test page with vertical lines prints. To print multiple test pages, hold down the engine test button. Display READY OFFLINE...

  • Page 215: Event Log

    Event Log Use the Event Log to diagnose and troubleshoot printer errors and intermittent failures. You can either display or print the Event Log. Access the Event Log from the Control Panel’s Information Menu. PRINT EVENT LOG SHOW EVENT LOG (Select .) The Event Log retains the printer’s last 30 error messages.

  • Page 216

    Most recent error (up to 30) Figure 7-3 Sample Event Log 7-14 Troubleshooting...

  • Page 217: Display The Event Log, Print The Event Log

    Display the Event Log If the printer cannot print or move any paper, follow these steps to display the Event Log. Otherwise, print the event log. INFORMATION MENU Press [Menu] until appears. SHOW EVENT LOG Press [Item] until appears. Press [Select] to show the Event Log.

  • Page 218: Interpret The Event Log

    Personality (PCL or PostScript) column or the cause of the jam at the time of the error. The event log for early versions of the HP LaserJet 4000 series printer may record errors in a different format than the Control Panel 13.20 PAPER JAM...

  • Page 219: Printer Messages

    Printer Messages The following tables explain messages that might display on the printer’s Control Panel. Alphabetical printer messages and their meanings are listed in Table 7-5, and numerical printer messages are listed in Table 7-6. Hint If a message persists requesting that you load a tray, or if a message indicates that a previous print job is still in the printer’s memory, press [Go] to print or press...

  • Page 220

    Table 7-5. Alphabetical Printer Messages Control Panel Event Log Explanation Recommended Message Message Action ACCESS DENIED The Control Panel Ask the network MENUS LOCKED function you are trying to administrator to unlock the access has been locked function. by the network administrator to prevent unauthorized access.

  • Page 221

    SYSTEM IS FULL EIO disk and then try again, or add a flash DIMM. 2. Download or delete files from HP JetAdmin, and download or delete fonts from HP FontSmart. (See the software help for more information.) Troubleshooting the Printing System 7-19...

  • Page 222

    The EIO disk is protected, Disable the write WRITE PROTECTED and no new files can be protection through written to it. HP JetAdmin. EIO n DISK The disk accessory card INITIALIZING takes a long time to initialize. The first parameter is the accessory slot number for this disk accessory card.

  • Page 223

    1. Delete files from the SYSTEM IS FULL flash DIMM or add another DIMM. 2. Download or delete files from HP JetAdmin, and download or delete fonts from HP FontSmart. (See the software help for more information.) Troubleshooting the Printing System 7-21...

  • Page 224

    FLASH IS The flash DIMM is Disable the write WRITE PROTECTED protected, and no new protection through files can be written to it. HP JetAdmin. INITIALIZING If the message displays Reseat DIMM(s). continually, a DIMM may not be inserted completely.

  • Page 225

    Table 7-5. Alphabetical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action LOADING Programs and fonts can Wait for the program to PROGRAM <NUMBER> be stored on the printer’s load. file system. At bootup time alternates with DO NOT POWER OFF these entities are loaded into RAM.

  • Page 226

    Table 7-5. Alphabetical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action MEMORY SETTINGS The printer changed its You might want to change CHANGED memory settings because memory settings for I/O it did not have enough Buffering and Resource memory to use the Saving (although default previous settings for I/O...

  • Page 227

    (Delete files using HP JetAdmin, HP FontSmart, or another software utility. See the software help for more information.) 2. If the message persists, increase the size of the RAM disk.

  • Page 228

    PS105 detects paper in 3. Check Sensor Arm Tray 1. Flags for damage and be PS107 detects paper in sure they move freely. Tray 3 (HP LaserJet 4. Replace any defective 4050 T/4050 TN). sensors. PS801 detects paper in the optional 500-sheet feeder.

  • Page 229

    Table 7-5. Alphabetical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action TRAY X LOAD One of the following 1. Load the requested [TYPE] [SIZE] occurred: paper into the specified There is no paper loaded tray ( in the specified tray, or the Ensure that the trays are paper is not the size...

  • Page 230

    Table 7-5. Alphabetical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action UNABLE TO Memory or file system MOPY JOB failures would not allow a mopy job to occur. Only one copy will be produced. UNSUPPORTED SIZE An external paper Load a supported paper IN TRAY [YY]...

  • Page 231

    Table 7-6. Numerical Printer Messages Control Panel Event Log Explanation Recommended Message Message Action 13.XX PAPER JAM Paper is jammed at the For all paper jam [LOCATION] specified location (and messages, do the possibly at other following: locations). 1. Remove jammed paper If the message persists from the specified after all jams have been...

  • Page 232

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 13.5 13.6 13.5 PAPER JAM 13.5 Paper delay jam at Fuser. For 1. Check the Transfer Roller and Small Media 13.6 PAPER JAM 13.6 Paper stopped jam at Belt to ensure they are Fuser.

  • Page 233

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 20 INSUFFICIENT The printer received more Press [Go] to print the MEMORY data than can fit in its transferred data (some available memory. You data might be lost), then alternates with PRESS GO TO might have tried to...

  • Page 234

    PRESS GO TO driver you are using is not (Some non-HP parallel IEEE-1284 compliant. For cables might be missing CONTINUE best results, use an HP pin connections, or might driver that came with the otherwise not conform to printer. the IEEE-1284 specification.)

  • Page 235

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 40 BAD SERIAL The printer encountered 1. Verify cable TRANSMISSION an error while transferring connections. Make sure data from the computer. the printer’s serial alternates with PRESS GO TO The error might have configuration is set the...

  • Page 236

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 41.3 UNEXPECTED The paper size you are 1. Make sure that all trays PAPER SIZE trying to print is not the are correctly adjusted for same as the settings for size.

  • Page 237

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 50.X FUSER ERROR A Fuser error has Turn the printer off, wait occurred. 20 minutes, and then turn X Description: the printer on. 1 = Low Fuser If the message persists, temperature reseat the Fuser.

  • Page 238

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 51.X PRINTER ERROR A loss of beam detect 1. Press [Go]. The page occurred. containing the error will automatically be X Description: reprinted. 1 = Beam detect error 2.

  • Page 239

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 53.XY.ZZ There is a memory error 1. Turn the printer off, and PRINTER ERROR with an accessory. The reseat or replace the DIMM that caused the specified DIMM.

  • Page 240

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 55 PRINTER ERROR An internal 1. Press [Go]. The page communications error containing the error will alternates with PRESS GO TO occurred. automatically be CONTINUE reprinted.

  • Page 241

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 59.X PRINTER ERROR A printing error occurred. 1. Turn the printer off, and X Description: then turn the printer on. 0 = Motor error 2. Check and reseat the 1 = Motor startup error Fuser and Toner Cartridge 2 = Motor rotation error...

  • Page 242

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 68 NVRAM ERROR An error occurred in the 1. Print a Configuration CHECK SETTINGS printer’s nonvolatile Page and check the memory (NVRAM) and printer settings to one or more printer determine which values settings has been reset to...

  • Page 243

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 79.XXXX The printer detected an 1. Turn the printer off, and PRINTER ERROR error. The numbers then turn the printer on. XXXX ) indicate the 2.

  • Page 244

    Table 7-6. Numerical Printer Messages (continued) Control Panel Event Log Explanation Recommended Message Message Action 8X.YYYY The EIO accessory in slot 1. Turn the printer off, and has encountered a then turn the printer on. critical error as specified 2. Reseat or replace the YYYY EIO board.

  • Page 245

    The following table lists the disk error numbers reported on either the Printer Collation or Job Storage Disk Error page, which is printed when an error exists. Table 7-7. Mopy Disk Error Messages Disk Error Error Description Solution Number Disk volume not present – it •...

  • Page 246

    • Delete all jobs stored for a user. The firmware will automatically delete the directory for a user with no stored jobs. • Delete other directories on the disk. Disk Error • Contact your HP Service and Support Representative. 7-44 Troubleshooting...

  • Page 247: General Paper Path Troubleshooting

    (either the Top Output Bin (page 7-47). or Rear Output Bin)? Do paper jams occur with a specific type of Try different media. See the HP LaserJet Printer Family Paper Specification Guide . The paper? guide is bundled with this service manual.

  • Page 248

    Table 7-8. General Paper Path Troubleshooting Questions (continued) Troubleshooting Check Action Are the paper tray guides set correctly? Ensure that the left-side paper guides for Trays 2 and 3 are set correctly at both the front and rear of the trays, and that the front guide is locked into the correct position.

  • Page 249: Paper Path Test

    Paper Path Test To perform a Paper Path Test: INFORMATION MENU Press [Menu] until appears. PRINT PAPER PATH TEST Press [Item] until appears. Press [Select]. Press to cycle selections until the desired paper tray appears. Press [Select]. Press until the desired output bin appears (open the Rear Output Bin to print to it).

  • Page 250: Information Pages

    Information Pages From the printer’s Control Panel you can print pages that give details about the printer and its current configuration. The following information pages are described here: Menu Map Configuration Page PCL or PS font list For a complete list of the printer’s information pages, print a Menu Map and see the Information Menu.

  • Page 251

    Figure 7-5 Sample Menu Map (4000 series printer) Troubleshooting the Printing System 7-49...

  • Page 252

    Figure 7-6 Sample Menu Map (4050 series printer) 7-50 Troubleshooting...

  • Page 253: Configuration Page

    (DIMMs), paper trays, and printer languages. Note If an HP JetDirect print server EIO card is installed, a JetDirect Configuration Page will print out as well. To print a Configuration Page: INFORMATION MENU...

  • Page 254: Troubleshooting

    Printer Information Memory Lists the serial number, HP JetSend Lists printer memory, PCL Driver work space IP addresses, page counts, and other (DWS), and I/O buffering and resource saving information for the printer. information. Installed Security Personalities Lists the and Options...

  • Page 255

    Printer Information Memory Lists the serial number, HP JetSend IP Lists printer memory, PCL Driver work addresses, page counts, and other space (DWS), and I/O buffering and information for the printer. resource saving information. addresses, page counts, and other information for the printer.

  • Page 256: Image Quality

    Is the customer using print For more information about HP’s paper specification standards, media that meets all HP see Chapter 1 of this manual and the HP LaserJet Family Paper paper specification Specification Guide . standards?

  • Page 257: Check The Toner Cartridge

    Check the Toner Cartridge Image formation defects are often the result of problems with the Toner Cartridge. If there is any doubt, always replace the Toner Cartridge before troubleshooting image defects. Use the following checklist to ensure that the Toner Cartridge is still operable.

  • Page 258

    Print Quality Menu. CAUTION HP does not recommend full-time use of EconoMode. If EconoMode is used full-time, it is possible that the Toner supply will outlast the mechanical parts in the Toner Cartridge.

  • Page 259: Image Defects

    Image Defects The quality of the printer’s output is subject to the judgment of the user. This section of the manual helps you define print quality defects and understand what factors affect print quality. The print samples shown in the following tables illustrate some print quality defects.

  • Page 260

    Hint If you find a defect that is not depicted, record the probable cause along with the conditions in the printing environment and save a copy of the defect for future reference. Table 7-11. Black Page Possible Cause Action The high-voltage Clean the high-voltage power supply terminals.

  • Page 261

    Table 7-12. Blank Page Possible Cause Action No Toner is available Remove sealing tape or replace the Toner for print. Cartridge. Defective laser Check the laser shutter for free operation when shutter. inserting the Toner Cartridge. Toner Cartridge Guide Make sure the guide is installed properly above the damaged, improperly Toner Cartridge.

  • Page 262

    Table 7-13. Blank Spots Possible Cause Action Paper does not meet 1. Print a few more pages to see if the problem printer specifications corrects itself. or is stored 2. Turn over the stack of paper in the tray. Also try improperly.

  • Page 263

    Table 7-14. Creases Possible Cause Action Paper does not meet 1. Print a few more pages to see if the problem printer specifications corrects itself. or is stored 2. Turn over the stack of paper in the tray. Also try improperly.

  • Page 264

    Table 7-15. Curl Possible Cause Action Paper does not meet 1. Print a few more pages to see if the problem printer specifications corrects itself. or is stored 2. Turn over the stack of paper in the tray. Also try improperly.

  • Page 265

    Table 7-16. Contamination on Back Possible Cause Action Contamination inside 1. Print at least 10 pages to see if the problem goes printer (Tray away. Separation Roller, 2. Print a cleaning page (page 4-4). Feed Roller, Transfer Identify and clean the contaminated part according Roller, Fuser, Toner to the “Repetitive Defect Ruler”...

  • Page 266

    Table 7-17. Distorted Image Possible Cause Action Paper does not meet 1. Print a few more pages to see if the problem printer specifications corrects itself. or is stored 2. Turn over the stack of paper in the tray. Also try improperly.

  • Page 267

    Table 7-18. Dropouts Possible Cause Action Paper might be too Check the paper (or other print media) type and smooth. quality. Printer’s operating Make sure the printer’s operating environment meets environment does not specifications. meet specifications. Wrong Toner density From the print quality menu on the Control Panel, setting.

  • Page 268

    Table 7-20. Gray Background Possible Cause Action Paper does not meet 1. Print a few more pages to see if the problem printer specifications corrects itself. or is stored 2. Turn over the stack of paper in the tray. Also try improperly.

  • Page 269

    Table 7-21. Horizontal Black Lines Possible Cause Action Defective Laser 1. See the “Repetitive Defect Ruler” on page 7-73. Scanner Assembly or 2. Reseat connectors on the Laser Scanner and Engine Controller Engine Controller Board. Board. 3. Replace the Laser Scanner Assembly followed by the Engine Controller Board, if necessary.

  • Page 270

    Table 7-24. Light Print, Dark Print, or Fade Possible Cause Action Wrong Toner density From the print quality menu on the Control Panel, setting. adjust the Toner density setting. Make sure EconoMode is off. Toner Cartridge is low. Replace the Toner Cartridge. Transfer Roller is Replace the Transfer Roller.

  • Page 271

    Table 7-25. Loose Toner Possible Cause Action Contamination in the 1. Print a few more pages to see if the problem printer. corrects itself. 2. Clean the inside of the printer (page 4-2) or use the printer’s cleaning page (page 4-4). Toner Cartridge is Replace the Toner Cartridge.

  • Page 272

    Table 7-27. Skew Possible Cause Action Paper does not meet 1. Print a few more pages to see if the problem printer specifications corrects itself. or is stored 2. Turn over the stack of paper in the tray. Also try improperly.

  • Page 273

    Table 7-29. Toner Specks Possible Cause Action Contamination in 1. Print a few more pages to see if the problem printer. corrects itself. 2. Clean the inside of the printer (page 4-2) or use the printer’s cleaning page (page 4-4). Paper does not meet 1.

  • Page 274

    Table 7-31. Vertical Dots Possible Cause Action Contaminated Static Clean the Static Eliminator. Eliminator teeth. Poor contact between Clean the contacts, if contaminated. If the problem the Static Eliminator remains after cleaning, or parts are damaged or and the Engine deformed, replace them.

  • Page 275: Repetitive Defect Ruler

    Repetitive Defect Ruler Repetitive print defects are usually associated with a specific roller within the printer or the Toner Cartridge. Use Figure 7-9 to isolate the cause of repetitive print defects. Align the first occurrence of the defect with the top of the “ruler” and measure to the next occurrence of the defect to determine the roller in question.

  • Page 276: Image System Troubleshooting

    Image System Troubleshooting Half Self Test Functional Check The electrophotographic process can be subdivided into the following stages: Cleaning (removes excess Toner from Drum surface) Conditioning (places a uniform electrical charge on Drum) Writing (laser strikes surface of Drum and creates latent image) Developing (forms the Toner image on Drum) Transferring (charge transfers the image to paper) Fusing (heat and pressure produces a permanent image)

  • Page 277: Drum Rotation Functional Check

    Drum Rotation Functional Check The Photosensitive Drum, located in the Toner Cartridge, must rotate for the print process to work. The Photosensitive Drum receives its drive from the Main Drive Assembly. To verify whether the Drum is rotating: Open the Top Cover. Remove the Toner Cartridge.

  • Page 278

    High-voltage Power Supply Functional Check The High-voltage Power Supply Assembly provides the necessary voltages for the printer’s electrophotographic processes. The +24B VDC supply is used to power the High-voltage Power Supply Assembly. A summary of the major components of the High-voltage System is given in Table 7-33.

  • Page 279: Interface Troubleshooting

    Before attempting to troubleshoot a network problem or notifying your network consultant of a problem, always print a Configuration Page. See the HP JetDirect Network Interface Configuration Guide for detailed explanations of network issues. Troubleshooting the Printing System 7-77...

  • Page 280

    Network statistics I/O card status IP address Novell status Node name Figure 7-10 Sample JetDirect Configuration Page (4000 series printer) 7-78 Troubleshooting...

  • Page 281

    Sample JetDirect Configuration Page (4050 series printer) Troubleshooting the Printing System 7-79...

  • Page 282: Hp Jetdirect Configuration

    HP JetDirect Configuration If the HP EIO JetDirect Card has successfully powered up and I/O CARD READY completed its internal diagnostics, the message I/O NOT READY appears. If communication is lost, an message appears followed by a two-digit error code. See the HP JetDirect Network Interface Configuration Guide for further details and recommended action.

  • Page 283: Autoexec.bat Standard Configurations

    AUTOEXEC.BAT Standard Configurations Parallel DOS Commands If the previous check did not produce the desired result, ensure that the AUTOEXEC.BAT file contains the following statements for parallel interface communications: MODE LPT1: , , P For MS-DOS version 4.0 and above: MODE LPT1: , , B Note This example assumes that you are using parallel printer port LPT1.

  • Page 284: Communications Checks

    Communications Checks Table 7-34. Communications Checks Checks Action Is your computer configured These parameters are required to communicate with the printer. to the parameters described Verify that the configuration of the computer's communications in the configuration port matches these parameters. instructions? Note: If these parameters are not set properly, an error may display on the Control Panel.

  • Page 285

    CAUTION HP LaserJet printers are not designed to work with mechanical switch-box products without proper surge protection. These devices generate high transient voltages that cause permanent damage to the Formatter PCA.

  • Page 286: Reference Diagrams, Locations Of Components

    Reference Diagrams Locations of Components Figure 7-11 Components of the Paper Pickup and Feed System (HP LaserJet 4000/4000 N and 4050/4050 N) 7-84 Troubleshooting...

  • Page 287

    Table 7-35. Components in Figure 7-11 PS101 Tray 2 Paper Out Sensor PS102 Pre-Feed Sensor PS103 Top of Page Sensor PS104 Top Output Bin Full Sensor PS105 Tray 1 Paper Out Sensor PS106 Fuser Delivery Sensor 2 PS501 Fuser Delivery Sensor 1 SL101 Tray Pickup Solenoid SL102...

  • Page 288

    Figure 7-12 Components of the Paper Feed System (HP LaserJet 4000/4000 N and 4050/4050 N with Optional 500-sheet Universal Tray Assembly) 7-86 Troubleshooting...

  • Page 289

    Figure 7-13 Components of the Duplexer Reference Diagrams 7-87...

  • Page 290

    Figure 7-14 Components of the Fusing and Delivery Unit 7-88 Troubleshooting...

  • Page 291

    Figure 7-15 Components of the Envelope Feeder Reference Diagrams 7-89...

  • Page 292: Paper Path

    Paper Path Figure 7-16 Paper Path (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN Shown) Figure 7-17 Paper Path with the Duplexer 7-90 Troubleshooting...

  • Page 293

    Figure 7-18 Paper Path with the Envelope Feeder Reference Diagrams 7-91...

  • Page 294

    Figure 7-19 Paper Sensors and the Paper Path Table 7-36. Paper Sensors in Figure 7-19 PS102 Pre-Feed Sensor Sensor and flag located on Registration/Feed Sensor Assembly. PS103 Top of Page Sensor Sensor and flag located on Registration/Feed Sensor Assembly. PS106 Fuser Paper Delivery Sensor 2 Sensor and flag located on Fuser Assembly.

  • Page 295

    Engine Controller Board Figure 7-20 Engine Controller Board Layout Table 7-37. Engine Controller Board Layout Power switch SW501 Test print switch VR201 Adjusted at factory VR501 Top of page adjustment VR601 Adjusted at factory Reference Diagrams 7-93...

  • Page 296: Paper Size Detection Switches

    Paper Size Detection Switches (1 of 3), Tray 2 (HP LaserJet 4000/4000 N and 4050/4050 N) Tray 3 Tray 2 Switches Switches Figure 7-22 Paper Size Detection Switches (2 of 3), Trays 2 and 3 (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) 7-94 Troubleshooting...

  • Page 297

    Figure 7-23 Paper Size Detection Switches (3 of 3), Optional 500-sheet Universal Tray Assembly Table 7-38. Paper Size Detection Switches in Figure 7-21 to Figure 7-23 Paper Size Paper Size Detection Switch SW600/603/801 SW601/604/802 SW602/605/803 No tray Legal Executive Letter Other Other Reference Diagrams 7-95...

  • Page 298

    Motors Figure 7-24 Location of Motors Table 7-39. Motors in Figure 7-24 M101 Main Motor M701 Reversing Motor (Duplexer) M702 Duplex Feed Motor (Duplexer) FM101 Cooling Fan FM701 Duplexer Exhaust Fan (Duplexer) H901 Fusing Heater 7-96 Troubleshooting...

  • Page 299: Connectors

    Connectors Figure 7-25 Connectors (1 of 3) Reference Diagrams 7-97...

  • Page 300

    Figure 7-26 Connectors (2 of 3) 7-98 Troubleshooting...

  • Page 301

    Figure 7-27 Connectors (3 of 3) For locations of connectors see the wiring diagrams at the back of this manual. Reference Diagrams 7-99...

  • Page 302: Pcas

    PCAs Figure 7-28 Location of PCAs 7-100 Troubleshooting...

  • Page 303

    Table 7-40. Location of PCAs Engine Controller Board Sequence control, High-voltage output, DC output, and Heater Drive. Paper Size Detection Relay between Sensors/Solenoids and Engine Controller Board, and Paper Size Detection. Paper Feeder Driver PCA Control and detection of solenoids in the Paper Feeder. Envelope Feeder Driver Control and detection of solenoids in the Envelope Feeder.

  • Page 304: Sensors And Thermistor

    Sensors and Thermistor Figure 7-29 Location of Sensors and Thermistor (1 of 2) 7-102 Troubleshooting...

  • Page 305

    Top Output Bin Full Sensor PS105 Tray 1 Paper Out Sensor PS106 Fuser Paper Delivery Sensor 2 PS107 Tray 3 Paper Out Sensor (HP LaserJet 4000 T/TN and 4050 T/TN) PS501 Fuser Paper Delivery Sensor 1 PS701 Duplex Pickup Paper Sensor (Duplexer)

  • Page 306

    Table 7-41. Sensors and Thermistor in Figure 7-29 and Figure 7-30 (continued) PS703 Reversed Paper Sensor (Duplexer) PS801 Paper Feeder Paper Sensor (Paper Feeder) PS901 Envelope Sensor (Envelope Feeder) PS902 Envelope Multiple Feed Sensor (Envelope Feeder) TH901 Fusing Surface Temperature Sensor 7-104 Troubleshooting...

  • Page 307: Solenoids And Clutch

    Solenoids and Clutch Figure 7-31 Location of Solenoids and Clutch (1 of 2) Reference Diagrams 7-105...

  • Page 308

    Figure 7-32 Location of Solenoids and Clutch (2 of 2) 7-106 Troubleshooting...

  • Page 309

    Feed Roller Clutch SL101 Tray 2 Pickup Solenoid SL102 Tray 1 Pickup Solenoid SL103 Tray 3 Pickup Solenoid (HP LaserJet 4000 T/TN and 4050 T/TN) SL701 Duplexer Solenoid (Duplexer) SL801 Paper Feeder Pickup Solenoid (Paper Feeder) SL901 Envelope Pickup Solenoid (Envelope Feeder)

  • Page 310: Switches

    Switches Figure 7-33 Location of Switches 7-108 Troubleshooting...

  • Page 311

    Tray 2 Paper size switch SW602 Tray 2 Paper size switch SW603 Tray 3 paper size switch (HP LaserJet 4000 T/TN and 4050 T/TN) SW604 Tray 3 paper size switch (HP LaserJet 4000 T/TN and 4050 T/TN) SW605 Tray 3 paper size switch (HP LaserJet 4000 T/TN and 4050 T/TN)

  • Page 312: Timing

    Timing Figure 7-34 Pickup Timing for Tray 2 (and lower trays) Figure 7-35 Pickup Timing for Tray 1 7-110 Troubleshooting...

  • Page 313

    Parts and Diagrams Overview This chapter discusses the following: How To Use the Parts Lists and Diagrams Accessories and Supplies Illustrations and Parts Lists Overview 8-1...

  • Page 314: How To Use The Parts Lists And Diagrams

    Consumables and accessories such as those listed in Table 8-1 can be ordered from Hewlett-Packard. The phone numbers are: U.S.: (800) 538-8787 Canada: 1-800-387-3154 (Toronto) 516-671-8383 United Kingdom: 0734-441212 Germany: 0130-3322 Contact your local HP Parts Coordinator for other phone numbers. 8-2 Parts and Diagrams...

  • Page 315

    Note Parts that have no item number or part number listed are not field replacement parts and cannot be ordered. How To Use the Parts Lists and Diagrams 8-3...

  • Page 316: Accessories And Supplies

    Accessories and Supplies The following items are available through your local authorized HP dealer. To find a dealer near you, call the HP Customer Information Center (800) 752-0900. Note See page 2-4 for documentation product numbers. Table 8-1. Accessories and Supplies Description Part No.

  • Page 317

    Table 8-1. Accessories and Supplies (continued) Description Part No. Exchange No. Product No. Font DIMM (8 MB Asian MROM) Traditional Chinese C4292A Simplified Chinese C4293A Euro FIR Receiver (4050 only) C4103-67901 C4103A Hard Disk C2985A Parallel Cables 2 Meter IEEE-1284 cable C2950A 3 Meter IEEE-1284 cable C2951A...

  • Page 318: Common Screws And Replacement Cables

    Common Screws and Replacement Cables Table 8-2. Screws Used in the Printer Description Part No. Screw, M4x10, self-tapping (black) XA9-0870-000CN Screw, M3x4, washer head XA9-0434-000CN Screw, M3x6, with star washer FA9-1449-000CN Screw, M3x6, washer head XA9-0267-000CN Screw, M4x12, self-tapping XA9-0773-000CN Screw, M4x116, long, module RB1-8703-000CN Screw, M4x10, self-tapping (silver)

  • Page 319

    Table 8-3. Replaceable Cables Description Part No. Table No. Item No. Cable and Power Receptacle RG5-3696-000CN Table 8-7 on page 8-15 Cable, Tray 1 Sensor RG5-3700-000CN Table 8-7 on page 8-15 Cable, Laser Scanner, and Output RG5-3876-000CN Table 8-8 on Bin Sensor page 8-17 Cable, Paper Feed/Tray 1 Pickup...

  • Page 320: Illustrations And Parts Lists

    Illustrations and Parts Lists Laser Scanner Top Cover Assembly Assembly Tray 1 Pickup Paper Assembly Delivery Assembly Fusing Assembly Tray 1 Assembly Delivery Drive Assembly Formatter Paper Feed Assembly Guide Assembly Printer Drive Assembly Registration Assembly Paper Feed Engine Controller Assembly Board Assembly Figure 8-1...

  • Page 321

    Table 8-4. Assemblies (Listed Alphabetically) and Their Part Numbers Description Part No. Exchange No. Exploded View in Figure Delivery Drive RG5-3721-000CN Figure 8-8 on page Assembly 8-24 EIO Cover 5021-0349 Engine Controller RG5-3693-000CN (110V) C4118-69006 (110V) Figure 8-7 on page Board RG5-3694-000CN (220V) C4118-69007 (220V)

  • Page 322

    Figure 8-2 External Covers and Panels 8-10 Parts and Diagrams...

  • Page 323

    Table 8-5. External Covers and Panels Item No. Part No. Quantity Description RB1-8858-000CN Panel, Formatter Cover RG5-2664-000CN Cover Assembly, Right Front RB1-8860-000CN Clip, Right Side Panel RB1-8849-000CN Power Switch Button RG5-2667-000CN Tray 1 Door Assembly RB1-8848-000CN Clip, Left Side Panel RG5-2665-000CN Cover Assembly, Left RB1-8843-000CN...

  • Page 324

    Figure 8-3 Top Cover Assembly 8-12 Parts and Diagrams...

  • Page 325

    Table 8-6. Top Cover Assembly Item No. Part No. Quantity Description RG5-2663-000CN Top Cover Assembly RB1-8841-000CN Panel, Toner Cartridge access RB1-8846-000CN Latch, Rear Tray RB1-8847-000CN Spring, Rear Tray Latch RB1-8710-000CN Plate Cover Illustrations and Parts Lists 8-13...

  • Page 326

    Figure 8-4 Internal Components (1 of 3) 8-14 Parts and Diagrams...

  • Page 327

    Table 8-7. Internal Components (1 of 3) Item No. Part No. Quantity Description RB1-8862-000CN Guide, Formatter/CP Cable RG5-3708-000CN Cable Formatter/Control Panel RB1-8703-000CN Screw, Module Attachment RH7-1331-000CN Main Motor Assembly RG5-3709-000CN Cable, Main Motor RG5-2645-000CN Support, Top Cover, Right RB1-8694-000CN Strap, Interlock Support Ground RG5-3703-000CN Cable, Paper Feed/Tray 1 Pickup Solenoid...

  • Page 328

    Figure 8-5 Internal Components (2 of 3) 8-16 Parts and Diagrams...

  • Page 329

    Table 8-8. Internal Components (2 of 3) Item No. Part No. Quantity Description RB2-2405-000CN Plate, Control Panel Ground RB1-8671-000CN Support, Top Cover, Left RB1-8827-000CN Leaf Spring RB1-8689-000CN Cable Holder RB1-8708-000CN Plate, Gear Plate Ground RG5-2642-000CN Registration/Feed Sensor Assembly RG5-3706-000CN Cable, Feed/Registration Sensors RG5-3710-000CN Cable, Feeder Module RB1-8690-000CN...

  • Page 330

    Table 8-8. Internal Components (2 of 3) (continued) Item No. Part No. Quantity Description C4118-40002 LJ4000 Overlay (English) C4118-40007 LJ4000 Overlay (French) C4118-40020 LJ4000 Overlay (German) C4118-40008 LJ4000 Overlay (Italian) C4118-40009 LJ4000 Overlay (Portugal) C4118-40010 LJ4000 Overlay (Norway) C4118-40011 LJ4000 Overlay (Hungarian) C4118-40012 LJ4000 Overlay (Swedish) C4118-40013...

  • Page 331

    Notes: Illustrations and Parts Lists 8-19...

  • Page 332

    Figure 8-6 Internal Components (3 of 3) 8-20 Parts and Diagrams...

  • Page 333

    Table 8-9. Internal Components (3 of 3) Item No. Part No. Quantity Description RF5-1867-000CN Pre-Transfer Ground Plate Assembly RG5-4283-000CN Transfer Roller Assembly RS5-0911-000CN Gear, Coupler RF5-2496-000CN Plate, Gear RB1-8747-000CN Plate, Registration Ground Illustrations and Parts Lists 8-21...

  • Page 334

    Figure 8-7 Engine Controller Board Assembly 8-22 Parts and Diagrams...

  • Page 335

    Table 8-10. Engine Controller Board Assembly Item No. Part No. Exchange No. Quantity Description RG5-3693-000CN C4118-69006 Engine Controller Board (110V) RG5-3694-000CN C4118-69007 Engine Controller Board (220V) Illustrations and Parts Lists 8-23...

  • Page 336

    Figure 8-8 Delivery Drive Assembly Table 8-11. Delivery Drive Assembly Item No. Part No. Quantity Description RG5-3721-000CN Delivery Drive Assembly WG8-5362-000CN Sensor, Optical 8-24 Parts and Diagrams...

  • Page 337

    Figure 8-9 Printer Drive Assembly Table 8-12. Printer Drive Assembly Item No. Part No. Quantity Description RG5-2653-000CN Printer Drive Assembly RB1-8757-000CN Guide, Cable, Gear Assembly Plate RB1-8756-000CN Rod, Toner Drive Illustrations and Parts Lists 8-25...

  • Page 338

    Figure 8-10 Tray 1 Pickup Assembly 8-26 Parts and Diagrams...

  • Page 339

    Table 8-13. Tray 1 Pickup Assembly Item No. Part No. Quantity Description RG5-2655-100CN Tray 1 Pickup Assembly RB2-2386-000CN Cover Envelope Feeder Drive RG5-3718-000CN Tray 1 Pickup Roller Assembly RB1-8787-000CN Arm, Tray 1 Paper Sensing RB2-2387-000CN Arm, Tray 1 Retaining RB1-8788-000CN Cover, Tray 1 Sensor Arm RH7-5172-000CN Solenoid, Tray 1 Drive...

  • Page 340

    Figure 8-11 Tray 1 Assembly Table 8-14. Tray 1 Assembly Item No. Part No. Quantity Description RG5-2656-000CN Tray 1 Assembly 8-28 Parts and Diagrams...

  • Page 341

    Figure 8-12 Paper Feed Assembly Table 8-15. Paper Feed Assembly Item No. Part No. Quantity Description RG5-2651-000CN Paper Feed Assembly Illustrations and Parts Lists 8-29...

  • Page 342

    Figure 8-13 Registration Assembly Table 8-16. Registration Assembly Item No. Part No. Quantity Description RG5-2652-070CN Registration Assembly 8-30 Parts and Diagrams...

  • Page 343

    Figure 8-14 Paper Feed Guide Assembly Table 8-17. Paper Feed Guide Assembly Item No. Part No. Quantity Description RG5-2643-000CN Paper Feed Guide Assembly RF5-2495-000CN Shaft, Belt Idler Assembly RB1-8668-000CN Belt, Feed Guide RB1-8674-000CN Shaft, Belt Drive Illustrations and Parts Lists 8-31...

  • Page 344

    Figure 8-15 Delivery Assembly 8-32 Parts and Diagrams...

  • Page 345

    Table 8-18. Delivery Assembly Item No. Part No. Quantity Description RG5-2648-000CN Delivery Assembly RG5-2650-000CN Delivery Sensor Arm Assembly RB2-2408-000CN Arm, Output Kicker, Right RB2-2409-000CN Arm, Output Kicker, Left Illustrations and Parts Lists 8-33...

  • Page 346

    Figure 8-16 Fuser Assembly (1 of 2) Table 8-19. Fuser Assembly (1 of 2) Item No. Part No. Exchange No. Quantity Description RG5-2661-000CN C4118-69003 Fuser (110 V) RG5-2662-000CN C4118-69004 Fuser (220 V) RB1-8805-000CN Panel, Fuser Cover 8-34 Parts and Diagrams...

  • Page 347

    Figure 8-17 Fuser Assembly (2 of 2) Table 8-20. Fuser Assembly (2 of 2) Item No. Part No. Exchange No. Quantity Description RG5-2661-000CN C4118-60003 Fuser (110V) RG5-2662-000CN C4118-60004 Fuser (220V) RG5-4269-000CN Fuser Film Assembly (110V) RG5-4291-000CN Fuser Film Assembly (220V) RB1-8794-000CN Roller, Fuser Pressure Illustrations and Parts Lists 8-35...

  • Page 348

    Figure 8-18 Internal Components of 500-Sheet Feeder 8-36 Parts and Diagrams...

  • Page 349

    Table 8-21. Internal Components of 500-sheet Feeder Item No. Part No. Quantity Description RB1-8890-000CN Guide, Paper RB1-8873-000CN Support, Paper Guide RG5-2668-000CN Cover Feeder Right Assembly RG5-3711-000CN Cable, Sensor RG5-2673-000CN Feeder Controller PCA RB1-8887-000CN Levers, Tray Sensing RB1-8886-000CN Cover, Feeder PCA RG5-3712-000CN Connector, Lower Tray (with cable) RB1-8107-000CN...

  • Page 350

    Figure 8-19 Paper Pickup Drive Assembly 8-38 Parts and Diagrams...

  • Page 351

    Table 8-22. Paper Pickup Drive Assembly Item No. Part No. Quantity Description RG5-2672-000CN Paper Pickup Drive Assembly (500-sheet) RS5-2632-000CN Spring, Pickup RB1-8877-000CN Coupler, Pickup RF5-2484-000CN Pickup Roller Assembly RB1-2190-000CN Clip, Pickup Spring RB1-8865-000CN Roller, Pickup RF5-2490-000CN Feed, Roller RB1-8879-000CN Arm, Tray Sensing Illustrations and Parts Lists 8-39...

  • Page 352

    Figure 8-20 500-sheet Tray 8-40 Parts and Diagrams...

  • Page 353

    Table 8-23. 500-sheet Tray Item No. Part No. Quantity Description RB1-8947-000CN Panel, Roller Access RF5-2489-000CN Mounting Assembly Separation Roller RB1-8948-000CN Gear, Separation Roller Drive RB1-8946-000CN Bushing, Separation Roller RB1-8945-000CN Coupler, Separation Roller RS5-2622-000CN Spring, Separation Roller Tension RF5-2670-000CN Paper Stop, 500-sheet Tray RF5-2490-000CN Roller RB1-8974-000CN...

  • Page 354

    Figure 8-21 Internal Components of 250-sheet Module (1 of 2) 8-42 Parts and Diagrams...

  • Page 355

    Table 8-24. Internal Components of 250-sheet Module (1 of 2) Item No. Part No. Quantity Description XA9-0870-000CN Screw, M4x10, Feed Modules RG5-2677-000CN Cover Assembly, Feeder, Upper Right RS5-1309-000CN Bearing, Transport Roller XD9-0135-000CN E-Clip RB1-8923-000CN Roller, Transport RB1-8922-000CN Roller, Transport Pressure RS5-2653-000CN Spring, Transport Roller RB1-8926-000CN...

  • Page 356

    Figure 8-22 Internal Components of 250-sheet Feeder (2 of 2) 8-44 Parts and Diagrams...

  • Page 357

    Table 8-25. Internal Components of 250-sheet Feeder (2 of 2) Item No. Part No. Quantity Description RG5-2679-000CN Cover Assembly, Feeder, Right Lower RG5-2680-000CN Cover Assembly, Feeder, Left Lower RB1-8907-000CN Cover, Feeder PCA RG5-2685-000CN Feeder, Control PCA RB1-9033-000CN Levers, Tray Sensing Upper RB1-9034-000CN Levers, Tray Sensing Lower XA9-0917-000CN...

  • Page 358

    Figure 8-23 Upper Paper Pickup Drive Assembly Table 8-26. Upper Paper Pickup Drive Assembly Item No. Part No. Quantity Description RG5-2683-000CN Upper Paper Pickup Drive Assembly (250-sheet) RB1-8910-000CN Arm, Tray Sensing 8-46 Parts and Diagrams...

  • Page 359

    Figure 8-24 Lower Paper Pickup Drive Assembly Table 8-27. Lower Paper Pickup Drive Assembly Item No. Part No. Quantity Description RG5-2684-000CN Lower Paper Pickup Drive Assembly (250-sheet) RB1-8910-000CN Arm, Tray Sensing Illustrations and Parts Lists 8-47...

  • Page 360

    Figure 8-25 250-sheet Tray 8-48 Parts and Diagrams...

  • Page 361

    Table 8-28. 250-sheet Tray Item No. Part No. Quantity Description RF5-2505-000CN 1 each Mounting Assembly Separation Roller RB1-9001-000CN 1 each Panel Roller Access RF5-2490-000CN 1 each Roller RB1-9009-000CN 1 each Paper Level Indicator RB1-9012-010CN 1 each Left Arm Lifter RB1-9013-010CN 1 each Right Arm Lifter Illustrations and Parts Lists 8-49...

  • Page 362

    Figure 8-26 Internal Components of Optional 500-sheet Universal Tray Assembly 8-50 Parts and Diagrams...

  • Page 363

    Table 8-29. Internal Components of Optional 500-sheet Universal Tray Assembly Item No. Part No. Quantity Description XD2-1100-502CN Ring, E RG5-2690-000CN Paper Pickup Drive Assembly, Optional (500-sheet) RB1-8865-000CN Roller VS1-6174-000CN Connector RB1-8928-000CN Tray Identifier Plunger RS5-2967-000CN Spring, Compression RB1-8915-000CN Frame, Right RG5-2688-000CN Left Frame Assembly RB1-8927-000CN...

  • Page 364

    Figure 8-27 Optional 500-sheet Universal Tray Assembly 8-52 Parts and Diagrams...

  • Page 365

    Table 8-30. Optional 500-sheet Universal Tray Assembly Item No. Part No. Quantity Description RF5-2489-000CN Separation Roller Mounting Assembly RB1-9374-000CN Stopper RS5-2981-000CN Spring RB1-9371-000CN Plate RF5-2490-000CN Feed Roller RB1-9009-000CN Paper Level Indicator RB1-8961-000CN Left Arm Lifter RB1-8962-000CN Right Arm Lifter Illustrations and Parts Lists 8-53...

  • Page 366

    Figure 8-28 Envelope Feeder 8-54 Parts and Diagrams...

  • Page 367

    Table 8-31. Envelope Feeder Item No. Part No. Exchange No. Quantity Description C4122A C4122-69001 Envelope Feeder RB1-9088-000CN Tray, Envelope Feeder RF5-2511-000CN Weight, Envelope RB1-9095-000N Mount, Envelope Weight Illustrations and Parts Lists 8-55...

  • Page 368

    Figure 8-29 Internal Components of Duplexer 8-56 Parts and Diagrams...

  • Page 369

    Table 8-32. Internal Components of Duplexer Item No. Part No. Exchange No. Quantity Description C4123A C4123-69001 Duplexer RB1-9044-000CN Cover, Top RB1-9047-000CN Cover, Right Duplexer RF5-1876-000CN Cover, Left with Connector RB1-9045-000CN Panel, Rear RH7-1361-000CN Illustrations and Parts Lists 8-57...

  • Page 370: Alphabetical Parts List

    Alphabetical Parts List Table 8-33. Alphabetical Parts List Description Part Number Table Number and Page 250-sheet Universal C4126A Table 8-1 on page 8-4 Replacement Tray 500-sheet Paper Feeder and C4124A Table 8-1 on page 8-4 Tray 500-sheet Universal C4125A Table 8-1 on page 8-4 Replacement Tray AC, Power Receptacle RG5-3696-000CN...

  • Page 371

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Cable, Paper Feed/Tray 1 RG5-3703-000CN Table 8-7 on page 8-15 Pickup Solenoid Cable, Sensor RG5-3711-000CN Table 8-21 on page 8-37 Cable, Top Cover Switch RG5-3705-000CN Table 8-7 on page 8-15 Cable, Tray 1 Sensor RG5-3700-000CN Table 8-7 on page 8-15...

  • Page 372

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Cover Feeder Right Assembly RG5-2668-000CN Table 8-21 on page 8-37 Cover, Left with Connector RF5-1876-000CN Table 8-32 on page 8-57 Cover, Right Duplexer RB1-9047-000CN Table 8-32 on page 8-57 Cover, Top RB1-9044-000CN Table 8-32 on page 8-57...

  • Page 373

    Table 8-21 on page 8-37 Guide, Paper, Lower RB1-8914-000CN Table 8-24 on page 8-43 Hard Disk C2985A Table 8-1 on page 8-4 HP LaserJet Paper HPJ1124 Table 8-1 on page 8-4 HP Multi-purpose Paper HPM1120 Table 8-1 on page 8-4 Laser Shutter Arm...

  • Page 374

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Levers, Tray Sensing Lower RB1-9034-000CN Table 8-25 on page 8-45 Levers, Tray Sensing Upper RB1-9033-000CN Table 8-25 on page 8-45 Lower Paper Pickup Drive RG5-2684-000CN Table 8-27 on page 8-47 Assembly (250-sheet) Lower Tray Logic PCA RG5-3821-000CN...

  • Page 375

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Paper Feeder Cable RG5-3822-000CN Table 8-29 on page 8-51 Paper Pickup Drive Assembly, RG5-2690-000CN Table 8-29 on page 8-51 Optional 500-sheet Tray Paper Pickup Drive Assembly RG5-2672-000CN Table 8-22 on page 8-39 (500-sheet) Paper Stop, 500-sheet Tray...

  • Page 376

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Roller, Transport Pressure RB1-8922-000CN Table 8-24 on page 8-43 Screw, M3x16, Feed Modules XA9-0917-000CN Table 8-21 on page 8-37, Table 8-24 on page 8-43, and Table 8-25 on page 8-45 Screw, M3x4, washer head XA9-0434-000CN Table 8-2 on page 8-6...

  • Page 377

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Spring, Leaf RB1-8927-000CN Table 8-29 on page 8-51 Spring, Pickup RS5-2632-000CN Table 8-22 on page 8-39 Spring, Rear Tray Latch RB1-8847-000CN Table 8-6 on page 8-13 Spring, Separation Roller RS5-2622-000CN Table 8-23 on page 8-41 Tension...

  • Page 378

    Table 8-33. Alphabetical Parts List (continued) Description Part Number Table Number and Page Tray, Rear Extension RB1-8844-000CN Table 8-5 on page 8-11 Upper Paper Pickup Drive RG5-2683-000CN Table 8-26 on page 8-46 Assembly (250-sheet) Weight, Envelope RF5-2511-000CN Table 8-31 on page 8-55 8-66 Parts and Diagrams...

  • Page 379: Numerical Parts List

    C2985A Hard Disk Table 8-1 on page 8-4 C3122A Standard 500-sheet Tray Table 8-1 on page 8-4 C4103A HP Fast InfraRed Receiver (LJ 4050 only) C4118-40002 Overlay (English) Table 8-8 on page 8-17 RBI-8861-000CN Maintenance Kit Table 8-1 on page 8-4...

  • Page 380

    Traditional Chinese C4293A Simplified Chinese FA9-1449-000CN Screw, M3x6, with star washer Table 8-2 on page 8-6 HPJ1124 HP LaserJet Paper Table 8-1 on page 8-4 HPM1120 HP Multi-Purpose Paper Table 8-1 on page 8-4 Enhanced I/O Cards Table 8-1 on page 8-4...

  • Page 381

    Table 8-34. Numerical Parts List (continued) Part Number Description Table Number and Page RB1-8690-000CN Retainer, Toner Sensing Table 8-8 on page 8-17 Spring RB1-8693-000CN Spring, Toner Cartridge Drum Table 8-8 on page 8-17 Ground RB1-8694-000CN Strap, Interlock Support Table 8-7 on page 8-15 Ground RB1-8695-000CN Spring, Toner Sensing...

  • Page 382

    Table 8-34. Numerical Parts List (continued) Part Number Description Table Number and Page RB1-8858-000CN Panel, Formatter Cover Table 8-5 on page 8-11 RB1-8860-000CN Clip, Right Side Panel Table 8-5 on page 8-11 RB1-8862-000CN Guide, Formatter/cp Cable Table 8-7 on page 8-15 RB1-8865-000CN Roller, Pickup Table 8-22 on page 8-39...

  • Page 383

    Table 8-34. Numerical Parts List (continued) Part Number Description Table Number and Page RB1-9044-000CN Cover, Top Table 8-32 on page 8-57 RB1-9045-000CN Panel, Rear Table 8-32 on page 8-57 RB1-9047-000CN Cover, Right Duplexer Table 8-32 on page 8-57 RB1-9088-000CN Tray, Envelope Feeder Table 8-31 on page 8-55 RB1-9095-000CN Mount, Envelope Weight...

  • Page 384

    Table 8-34. Numerical Parts List (continued) Part Number Description Table Number and Page RG5-2645-000CN Support, Top Cover, Right Table 8-7 on page 8-15 RG5-2648-000CN Delivery Assembly Table 8-7 on page 8-15 and Table 8-18 on page 8-33 RG5-2650-000CN Delivery Sensor Arm Table 8-18 on page 8-33 Assembly RG5-2651-000CN...

  • Page 385

    Table 8-34. Numerical Parts List (continued) Part Number Description Table Number and Page RG5-2685-000CN Feeder, Control PCA Table 8-25 on page 8-45 RG5-2688-000CN Left Frame Assembly Table 8-29 on page 8-51 RG5-2690-000CN Paper Pickup Drive Assembly, Table 8-29 on page 8-51 Optional 500-sheet Tray RG5-3693-000CN (110V) Engine Controller Board...

  • Page 386

    Table 8-34. Numerical Parts List (continued) Part Number Description Table Number and Page RH7-5172-000CN Solenoid, Tray 1 Drive Table 8-13 on page 8-27 RS5-0911-000CN Gear, Coupler Table 8-9 on page 8-21 RS5-0946-000CN Gear, Transport Roller Table 8-24 on page 8-43 RS5-1179-000CN Bearing, Transport Roller Table 8-29 on page 8-51...

  • Page 387

    Index Numerics connectors 7-97 Control Panel 250-sheet tray, paper specifications 1-13 removing and replacing 6-8 500-sheet tray, paper specifications 1-12 control panel 3-2, 5-21 changing settings 3-5 defaults 3-4 AC/DC power distribution 5-2 keys 3-2, 3-3 accessories 8-4 layout 3-2 assemblies lights 3-2 Delivery 8-32...

  • Page 388

    Laser Scanner, removing and replacing 6-23 Paper Handling menu 3-9 Left Side Cover, removing and replacing 6-12 paper jam 5-48 Lower Paper Feed Module Plate (HP LaserJet 4000 paper path 7-90 T/4000 TN), removing and replacing 6-53 cleaning 4-4 troubleshooting 7-45...

  • Page 389

    3-33 PCA Controller, removing and replacing 6-56 Resets menu 3-31 PCA Cover, removing and replacing resetting printer 3-38 HP LaserJet 4000 T/4000 TN 6-54 clearing NVRAM 3-38 HP LaserJet 4000/4000 N 6-55 cold reset 3-38 PCAs 7-100 Right Side Toner Cartridge Guide, removing and...

  • Page 390

    testing, engine 7-11 variable fusing temperature 5-32 thermistor 7-102 timing diagrams 7-110 toner warranty statement 2-10 cleaning spilled 4-4 weight, paper consumption 1-28 250-sheet tray 1-13 toner cartridge 2-9, 5-22, 5-24 500-sheet tray 1-12, 1-14 detection 5-5 recycling 2-9 refilled 2-9 Toner Cartridge Drive Arm, removing and replacing tools 6-3 Top Cover...

  • Page 391

    J110 detection sensor TB901 J913 switch SL 901 Envelope PS801 SL801 pickup solenoid PS101 SL101 PS902 Paper feeder Paper feeder Paper feeder Tray paper Tray pickup paper sensor Envelope mulitplefeed sensor pickup solenoid sensor solenoid Wiring Diagram (HP LaserJet 4000/4000N)

  • Page 392

    PS101 SL103 SL101 PS107 PS902 Paper feeder Paper feeder Paper feeder Upper tray Lower tray Upper tray Lower tray Envelope mulitplefeed sensor paper sensor pickup solenoid paper sensor pickup solenoid pickup solenoid paper sensor Wiring Diagram (HP LaserJet 4000 T/4000TN)

  • Page 394

    Copyright© 1999 Hewlett-Packard Co. Printed in USA Manual Part No. C4251-91003 *C4251-91003* *C4251-91003* Printed on at least 50% Total Recycled Fiber with at least 10% Post-Consumer Paper C4251-91003...

  • Page 395

    HP LaserJet 4050, 4050 T, 4050 N, and 4050 TN Printers User’s Guide...

  • Page 396

    © Copyright Hewlett-Packard Warranty Trademark Credits Company 1999 The information contained in Adobe and PostScript are this document is subject to trademarks of Adobe Systems All Rights Reserved. change without notice. Incorporated which may be Reproduction, adaptation, or registered in certain translation without prior written Hewlett-Packard makes no jurisdictions.

  • Page 397: Navigational Features In This Guide, Features Of Acrobat Reader

    How to Use This Online User’s Guide This user’s guide is provided in an Adobe™ Acrobat portable document format (PDF file). This section will help familiarize you with using PDF documents. Navigational Features in This Guide Click the Table of Contents icon to go to the table of contents for the online user’s guide.

  • Page 398

    Magnifying the Page View You can use the zoom-in tool, the magnification box in the status bar, or the toolbar buttons to change the screen magnification. When you zoom in on a document, you can use the hand tool to move the page around.

  • Page 399: Printing The Document

    Browsing with Thumbnails A thumbnail is a miniature view of each document page. You can display thumbnails in the overview area. Use a thumbnail to jump quickly to a page and to adjust the view of the current page. Click on a thumbnail to move to the page it represents. Finding Words Use the Find command to find part of a word, a complete word, or multiple words in the active document.

  • Page 400: Where To Look For More Information, Setting Up The Printer

    Where to Look for More Information . . . Several references are available for use with this printer. For additional copies of the guides below, contact HP Direct at (800) 538-8787 (U.S.) or contact your HP-authorized dealer. Additional information is available at http://www.hp.com.

  • Page 401: Using The Printer

    Information on printer options that are available from within printer drivers. To view a help file, access the online help through the printer driver. HP Fast InfraRed Receiver User Guide Detailed information on using and troubleshooting the HP Fast InfraRed Receiver.

  • Page 402: Hp Customer Care Service And Support, Online Services, For Canada

    Online Services For 24-hour access to information over your modem, we suggest these services: World Wide Web Printer drivers, updated HP printer software, plus product and support information may be obtained from the following URLs: in the U.S. http://www.hp.com/go/support Printer drivers may be obtained from the following sites: in China ftp://www.hp.com.cn/go/support...

  • Page 403: For Europe

    For Europe: HP Distribution Europe The languages supported are also listed above beside the telephone numbers. Hours of operation are 7:30 am GMT (8:30 am CET) to 17:00 GMT (18:00 CET). Within UK Internationally English speaking line 01429 865511 +44 1429 865511...

  • Page 404

    This powerful, CD-ROM-based parts information tool is designed to give users fast, easy access to parts information such as pricing and recommended stocking lists for a wide range of HP products. To subscribe to this quarterly service in the U.S. or Canada, call (800) 336-5987.

  • Page 405

    HP FIRST fax-on-demand service will deliver detailed troubleshooting information on common software and troubleshooting tips for your HP product. Call from any touch tone phone and request up to three documents per call. These documents will be sent to the fax of your choice. Many of these numbers are local numbers and will not work internationally.

  • Page 406: Customer Support Options Worldwide

    The service and support chapter of this user’s guide contains worldwide sales and service addresses and phone numbers for countries not listed here. HP Customer Care and Product Repair Assistance for the U.S. and Canada Refer to the service and support chapter of this user’s guide for additional product repair information.

  • Page 407

    Open Monday through Friday 8:30 - 18:00 Central European Time (CET) HP provides a free telephone support service during the warranty period. By calling a telephone number listed below, you will be connected to a responsive team waiting to help you. If you require support after your warranty has expired, you can receive support for a fee through the same telephone number.

  • Page 408

    In-country Support Numbers If you require support after your warranty has expired, additional product repair services, or if your country is not listed below, see “Worldwide Sales and Service Offices” on page 145. Argentina 787-8080 Australia (61) (0) 3 8877 8000 Brazil 011-829-6612 Canada...

  • Page 409

    HP FIRST ........xi...

  • Page 410: Table Of Contents

    Deleting a Stored Job ......74 Printing with the Optional HP Fast InfraRed Receiver ..75 Setting Up to Print with Windows 9x .

  • Page 411: Table Of Contents

    Checking the Toner Level ......79 Resetting the HP TonerGauge ..... . 79 Continue Printing When Toner Is Low .

  • Page 412

    Service Information Form ......142 HP Software License Terms ......143 Worldwide Sales and Service Offices .

  • Page 413

    D Printer Commands Overview ......... D-1 Understanding PCL 5e Printer Command Syntax .

  • Page 414

    xx Contents...

  • Page 415: Printer Basics

    Printer Basics Overview Congratulations on your purchase of an HP LaserJet 4050 series printer. If you have not done so, see the getting started guide provided with the printer for setup instructions. Now that the printer is set up and ready to use, take a few moments to get to know the printer.

  • Page 416: Printer Features And Benefits

    Language and Fonts ™ • HP PCL 6, PCL 5e, and PostScript Level 2 emulation • 110 fonts for Microsoft Windows, plus HP FontSmart Expandable Design • 500-sheet universal paper tray, 75-envelope power feeder, and duplex printing accessory available •...

  • Page 417: Printer Information

    HP Fast InfraRed (FIR Receiver), and one 500-sheet tray. HP LaserJet 4050 T The HP LaserJet 4050 T comes standard with 8 MB RAM and two 250-sheet trays. HP LaserJet 4050 TN The HP LaserJet 4050 TN comes standard with 16 MB RAM,...

  • Page 418: Printer Parts And Locations

    Top output bin panel Top cover Additional memory can be installed here. Tray 1 (100-sheet) Power switch Tray numbers Paper level indicator Tray 2 (500-sheet, closed) Figure 1 Printer Parts (front view, HP LaserJet 4050/4050 N printer) 4 Chapter 1: Printer Basics...

  • Page 419

    Figure 2 Printer Parts (rear view, HP LaserJet 4050/4050 N printer) Rear output bin (straight-through paper path) Power connector Dust cover FIR receiver port Parallel interface port Network, I/O slot 10/100Base-TX (RJ-45) port Memory (More than one DIMM can be installed.)

  • Page 420

    The printer supports two enhanced input/output (EIO) cards. One of these is used in the HP LaserJet 4050 N and 4050 TN for the HP JetDirect 10/100Base-TX print server card. Other accessories and options are available. For ordering information, see page 8.

  • Page 421: Suggested Accessories

    Suggested Accessories Use the following accessories to optimize the printer. HP LaserJet 4050/4050 N Printers HP LaserJet 4050 T/4050 TN Printers Figure 3 Optional Accessories HP JetDirect Print Server (EIO card) Hard Disk (EIO card) Memory or Flash DIMM HP Fast InfraRed Receiver...

  • Page 422: Ordering Information

    Ordering Information Use only accessories specifically designed for this printer. To order an accessory, contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) Ordering Information Item...

  • Page 423

    Item Description or Use Part Number Dual In-line Memory Boosts the ability of the printer to Module (DIMM) handle large print jobs (maximum 200 MB with HP brand DIMMs): EDO DIMMs 4 MB C4135A 8 MB C4136A 16 MB C4137A...

  • Page 424

    92215S Serial Cable computer. Macintosh Network For PhoneNET or LocalTalk 92215N Cable Kit connection. Enhanced I/O Cards HP JetDirect 600N EIO internal print servers: 10Base-T Ethernet, single RJ-45 J3110A port Ethernet 10Base-T and 10Base2, J3111A LocalTalk networks Token Ring networks...

  • Page 425

    Description or Use Part Number HP LaserJet Printer Family A guide to using paper and other 5040-9072 Paper Specification Guide print media with HP LaserJet (English only) printers. HP LaserJet 4050, 4050 T, An additional copy of the user C4251-60104 4050 N, and 4050 TN User documentation CD-ROM.

  • Page 426: Control Panel Layout, Control Panel Lights

    Control Panel Layout The printer’s control panel consists of the following: READY Two-line display Menu Ready Item Data Printer online help – Value + Attention Cancel Select Figure 4 Control Panel Layout Control Panel Lights Light Indication when lit Ready The printer is ready to print.

  • Page 427

    Control Panel Keys Function [Go] • Places the printer either online or offline. • Prints any data residing in the printer’s buffer. • Allows the printer to resume printing after being offline. Clears most printer messages and places the printer online. TRAY •...

  • Page 428: Using The Printer Online Help System

    Using the Printer Online Help System This printer features an online help system on the control panel that provides instructions for resolving most printer errors. Certain control panel error messages alternate with instructions on accessing the online help system. Whenever a [?] appears in an error message, or a message alternates with FOR HELP PRESS THE ? KEY , press the [Item] to navigate through a sequence of instructions.

  • Page 429

    Control Panel Menus For a complete list of control panel items and possible values, see page B-1. Press [Menu] for access to all control panel menus. When additional trays or other accessories are installed in the printer, new menu items automatically appear. To Change a Control Panel Setting: Press [Menu]...

  • Page 430

    To Print a Control Panel Menu Map: To see the current settings for the menus and items available in the control panel, print a control panel menu map: repeatedly until INFORMATION MENU appears. Press [Menu] repeatedly until PRINT MENU MAP appears. Press [Item] Press...

  • Page 431: Printer Software

    *These products are not supported in Traditional Chinese, Simplified Chinese, Korean, and Japanese. **HP Resource Manager is supported only in English, French, Italian, German, Spanish, Dutch, Traditional Chinese, Simplified Chinese, Korean, and Japanese. ***These products are supported by English only.

  • Page 432

    The most recent drivers, additional drivers, and other software are available from the Internet (see the HP Customer Care Service and Support pages at the front of this user’s guide). Depending on the configuration of Windows-driven computers, the installation program for the printer software automatically checks the computer for Internet access and can obtain the latest software.

  • Page 433

    Network administration software for UNIX, IBM OS/2, and other network operating systems is available from the web or through your HP distributor. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) The drivers and software components for end users and administrators using the environments listed above are described in the following sections.

  • Page 434: Printer Drivers

    Printer Drivers Printer drivers access the printer features and allow the computer to communicate with the printer (via a printer language). Note Check the ReadMe.wri file provided on the compact disc for additional software included and supported languages. Certain printer features are available only from the PCL 6 drivers. See the printer software help for availability of features.

  • Page 435: Additional Drivers

    Windows Within the computer installation program, select Typical Install to install the PCL 5e/6, and PS drivers and HP FontSmart. Select Custom Install to install only the software you prefer, or if you are a network administrator. Select Minimum Install to install only the PCL 6 driver for basic printing.

  • Page 436: Software For Windows

    For more information, see page 20.) Network Administrators: If the printer is attached to a network through an HP JetDirect EIO card, before you can print, the printer must be configured for that network. To configure the printer for your network, you can select Custom Install from the printer installation program or use HP JetAdmin software.

  • Page 437

    Access the Windows Printer Driver To configure the driver, access it in one of the following ways: Temporarily Change Settings Change Default Settings Operating System (from a software application) (across all applications) Windows 9x From the File menu, click Print, Click the Start button, point to and then click Properties.

  • Page 438: Printer Driver Help

    Choose the Right Printer Driver for Your Needs Choose a printer driver based on the way you use the printer. • Use the PCL 6 driver to take full advantage of the printer’s features. Unless backward compatibility with previous PCL drivers or older printers is necessary, the PCL 6 driver is recommended.

  • Page 439: Hp Resource Manager

    HP LaserJet printer matching screen fonts HP Resource Manager The HP Resource Manager should be installed only on the network administrator’s computer. The HP Resource Manager allows you to control hard disk and flash memory features not found in the drivers.

  • Page 440: Hp Jetsend Communications Technology

    You can visit the HP JetSend website to learn which other devices are available to communicate easily and directly with your HP JetSend-enabled printer.

  • Page 441

    Networked Devices To use the HP JetSend capability between networked devices, print a configuration page (see page 134) to find your HP JetSend IP address, and give your address to anyone who wants to send information to your printer via HP JetSend.

  • Page 442: Software For Macintosh Computers

    An installation program for the PPDs and other software is provided on the compact disc. Use the Apple LaserWriter 8 Driver that comes with the computer or is installed with the HP printer software compact disc. HP LaserJet Utility...

  • Page 443: Software For Networks

    HP JetAdmin HP JetAdmin software is primarily for users who cannot use HP Web JetAdmin due to the lack of browser access or because none of the supported server platforms exist on their network. HP JetAdmin should be installed only on the network administrator’s computer.

  • Page 444: Hp Web Jetadmin

    HP-UX* • Sun Solaris* *HP Web JetAdmin is not included on the CD-ROM with the printer, but is available from the Internet at http://www.hp.com/support/ net_printing. If you do not have access to the Internet, see the HP Customer Care Service and Support pages at the front of this user’s guide to obtain this software.

  • Page 445: Printing Tasks

    Printing Tasks Overview This chapter presents basic printing tasks, such as: • Selecting the output bin. • Loading the trays. • Printing on both sides of paper with the optional duplexer. • Printing on special paper, such as letterhead and envelopes, (including automatically feeding envelopes with the optional envelope feeder).

  • Page 446: Selecting The Output Bin, Printing To The Top Output Bin

    Selecting the Output Bin The printer has two output locations: the rear output bin and the top output bin. To use the top output bin, be sure the rear output bin is closed. To use the rear output bin, open it. •...

  • Page 447: Printing To The Rear Output Bin

    Printing to the Rear Output Bin The printer always prints to the rear output bin if it is open. Paper comes out of the printer face-up, with the last page on top. To open the rear output bin, grasp the handle at the top of the bin. Pull the bin down, and slide out the extension.

  • Page 448: Loading Tray 1, Loading Tray

    Loading Tray 1 Note To avoid paper jams, do not load trays while the printer is printing. Tray 1 is a multi-purpose tray that holds a variety of paper, including up to 100 sheets of paper, 10 envelopes, or 20 index cards. The printer might pull paper from Tray 1 first.

  • Page 449

    Loading Tray 2 (4050/4050 N) Tray 2 is a 500-sheet tray. The optional 500-sheet tray is adjusted differently (page 39). (Tray 2 and the optional 500-sheet tray can be interchanged in the printer.) Tray 2 adjusts for letter, A4, and legal sizes; these adjustments affect printer performance.

  • Page 450

    4 Load paper into the tray. For correct orientation, see page 46. 5 Make sure the paper is flat in the tray at all four corners and below the tabs on the guides. Slide the tray back into the printer. The printer automatically senses the size of paper loaded if the tray is adjusted correctly.

  • Page 451

    Loading Trays 2 and 3 (4050 T/4050 TN) Trays 2 and 3 are 250-sheet trays. For supported sizes of paper, see page A-3. Choose A5 and B5 ISO as custom sizes in the printer driver for these trays (page 56). Note To avoid paper jams, do not load trays while the printer is printing.

  • Page 452

    4 Load paper into the tray. 5 Make sure the paper is flat in the tray at all four corners and below the tabs on the guides. Gently slide the tray back into the printer. The printer senses the size of paper loaded if the tray is adjusted correctly.

  • Page 453: Loading The Optional 500-sheet Tray

    Loading the Optional 500-Sheet Tray The optional 500-sheet tray is Tray 3 for the HP LaserJet 4050/4050 N printers, or Tray 4 for the HP LaserJet 4050 T/ 4050 TN printers. This tray is adjusted differently than Tray 2 (page 35). Tray 2 and the optional 500-sheet tray can be interchanged in the printer.

  • Page 454

    5 Make sure the paper is flat at all four corners and below the tabs on the guides. 6 Set the dial on the right side of the tray to match the paper size. Note Setting the dial adjusts the printer’s sensors.

  • Page 455: Printing Both Sides Of Paper, Optional Duplexer

    Printing Both Sides of Paper (Optional Duplexer) The printer can automatically print on both sides of paper with an optional duplex printing accessory (duplexer). This is called duplexing. Note See the documentation included with the duplexer for complete installation and setup instructions. Duplexing might require additional memory (page C-1).

  • Page 456: Guidelines For Printing Both Sides Of Paper

    Guidelines for Printing Both Sides of Paper Caution Do not print on both sides of labels, transparencies, envelopes, or paper heavier than 28 lb (105 g/m ). Damage to the printer and paper jamming might result. WARNING! To avoid personal injury and damage to the printer, do not lift the printer with the duplexer installed.

  • Page 457: Paper Orientation For Printing Both Sides Of Paper

    Paper Orientation for Printing Both Sides of Paper The duplexer prints the second side of paper first, so paper such as letterhead and preprinted paper needs to be oriented as shown in Figure 9. Figure 9 Paper Orientation for Printing Both Sides of Paper For Tray 1, load the first side facing down and the top toward you.

  • Page 458: Layout Options For Printing Both Sides Of Paper

    Layout Options for Printing Both Sides of Paper The four print orientation options are shown below. These options can be selected from the printer driver or from the printer’s control panel (set BINDING from the Paper Handling Menu and ORIENTATION from the Printing Menu). 1.

  • Page 459: Printing Special Paper, Printing Letterhead, Prepunched, Or Preprinted Paper

    Printing Special Paper Special paper includes letterhead, prepunched (including 3-hole punched), envelopes, labels, transparencies, and custom-size paper. Printing Letterhead, Prepunched, or Preprinted Paper When printing letterhead, prepunched, or preprinted paper, it is important to correctly orient the paper. See the “Paper Orientation” section for instructions.

  • Page 460: Paper Orientation

    Paper Orientation For Tray 1, load paper with the side-to-be-printed facing up, and the top, short edge toward the printer. Figure 11 Paper Orientation for Tray 1 For all other trays, load paper with the side-to-be-printed facing down, and the top edge toward you. Figure 12 Paper Orientation for All Other Trays 46 Chapter 2: Printing Tasks...

  • Page 461: Printing Envelopes

    Printing Envelopes With the optional envelope feeder, the printer will automatically feed up to 75 envelopes. To order an envelope feeder, see page 8. To print with the envelope feeder, see page 49. Many types of envelopes can be printed from Tray 1. (Up to 10 can be stacked in the tray.) Printing performance depends on the construction of the envelope.

  • Page 462: Loading Envelopes In Tray 1

    Loading Envelopes in Tray 1 1 Open Tray 1, but do not pull out the extension. (Envelopes feed best without the extension.) 2 Open the rear output bin and pull out the tray extension. (This reduces envelope curl and wrinkling.) 3 Load up to 10 envelopes in the center of Tray 1 with the side-to-be-printed facing up, and the postage-end...

  • Page 463

    Feeding Envelopes Automatically (Optional Envelope Feeder) With the optional envelope feeder, the printer will automatically feed up to 75 envelopes. To print envelopes without an envelope feeder, see page 47. Note See the documentation included with the envelope feeder for complete installation and setup instructions.

  • Page 464

    Inserting and Removing the Envelope Feeder 1 Open Tray 1. 2 Open the access door on the right, front corner of the printer, inside Tray 3 Remove the plastic cover from the printer. (Replace the cover when the envelope feeder is not attached.) 4 Insert the envelope feeder into the printer as far as it will go.

  • Page 465

    Loading Envelopes in the Envelope Feeder Note Print only on envelopes approved for use in the printer (page 47 and page A-11). 1 Fold down the tray extension. Lift the envelope weight. 2 Squeeze the release lever on the left envelope guide and slide the guides apart.

  • Page 466

    4 Adjust the guides to touch the envelopes without bending them. Make sure the envelope feeder is not overfilled. 5 Lower the envelope weight onto the envelopes. Note Select the envelope size from the software application (if the setting is available), the printer driver, and the Paper Handling Menu in the printer’s control panel (page B-5).

  • Page 467: Printing Labels

    Printing Labels Use only labels recommended for use in laser printers. Make sure that labels meet the correct specifications (page A-3). • Print a stack of 50 labels from Tray 1 or a stack of 50 to 100 labels from other trays. •...

  • Page 468

    Do not: Caution Failure to follow these instructions can damage the printer. • Do not load the trays to capacity because labels are heavier than paper. • Do not use labels that are separating from the backing sheet, wrinkled, or damaged in any way. •...

  • Page 469: Printing Transparencies

    Printing Transparencies Use only transparencies recommended for use in laser printers. For transparency specifications, see page A-10. • Load transparencies face up in Tray 1 with the top toward the printer. • A stack of 50 to 100 transparencies can be printed from other trays.

  • Page 470: Printing Cards, Custom-size, And Heavy Paper

    Note Choose A5 and B5 (ISO) as custom sizes in the printer driver for Tray 2 and Tray 3 (HP LaserJet 4050 T/4050 TN printers) and the optional 500-sheet tray. Settings for these sizes are marked in the tray, but custom settings must be selected in the software and from the printer’s control panel.

  • Page 471

    Guidelines for Printing Custom-Size Paper • Do not attempt to print on paper smaller than 3 inches (76 mm) wide or 5 inches (127 mm) long. • Set page margins at least .17 inch (4.23 mm) away from the edges. •...

  • Page 472

    If the settings are not available from the software, set the custom paper size from the control panel: From the Printing Menu set CONFIGURE CUSTOM PAPER=YES . From the Printing Menu, select inches or millimeters as the unit of measurement. From the Printing Menu, set the X dimension (the front edge of the paper) as shown in Figure 16.

  • Page 473: Advanced Printing Tasks, Using Features In The Printer Driver

    To access Windows printer drivers, see page 23. Note HP PCL 5e, PCL 6, PS, OS/2, UNIX and Macintosh drivers are slightly different. Check the drivers for available options. The PCL6 driver takes full advantage of the printer’s features.

  • Page 474: Printer Driver Features

    RIP ONCE RIP ONCE allows the print job to be processed one time at the printer. The RIP ONCE capability creates an image of the page then saves a compressed image of the page into memory. RIP ONCE is enabled when a minimum of 16 MB of RAM or a hard disk is installed in the printer.

  • Page 475: Different First Page

    Different First Page Follow these instructions for printing a first page that is different from other pages in the print job. For Windows, select “Use different paper for first page” in your printer driver. Choose Tray 1 (or Manual Feed) for the first page and one of the other trays for the remaining pages.

  • Page 476: Printing Multiple Pages On One Sheet Of Paper

    Printing Multiple Pages on One Sheet of Paper You can print more than one page on a single sheet of paper. This feature is available in some printer drivers, and provides a cost-effective way to print draft pages. To print more than one page on a sheet of paper, look for a Layout or Pages Per Sheet option in the printer driver.

  • Page 477: Customizing Tray 1 Operation

    Customizing Tray 1 Operation Customize Tray 1 to fit your printing needs. The printer can be set to print from Tray 1 as long as it is loaded, or to print only from Tray 1 if the type of paper loaded is specifically requested.

  • Page 478: Manually Feeding Paper From Tray 1

    Manually Feeding Paper from Tray 1 The Manual Feed feature allows you to print on special paper from Tray 1, such as envelopes or letterhead. If Manual Feed is selected, the printer will print only from Tray 1. Select Manual Feed through the software or printer driver. Manual Feed can also be enabled from the Paper Handling Menu in the printer’s control panel.

  • Page 479: Printing By Type And Size Of Paper

    Printing by Type and Size of Paper You can configure the printer to select paper by type (such as plain or letterhead) and size (such as letter or A4), as opposed to source (a paper tray). Benefits of Printing by Type and Size of Paper If you frequently use several different kinds of paper, once trays are set up correctly, you do not have to check which paper is loaded in each tray before you print.

  • Page 480

    From the software or printer driver, select the desired type and size of paper. Note The type and size settings can also be configured from HP Web JetAdmin and HP JetAdmin software for networked printers. See the printer driver help.

  • Page 481: Job Retention Features, Quick Copying A Job, Printing Additional Copies Of A Quick Copy Job

    Job Retention Features To use the job retention features listed below, you must install a hard disk in the printer and properly configure the drivers. Caution Make sure to identify your jobs in the printer driver before printing. Using default names may override previous jobs with the same default name or cause the job to be deleted.

  • Page 482: Deleting A Stored Quick Copy Job

    If you turn the printer off and then back on, all quick copy, proof and hold, and private jobs are deleted. A stored quick copy job can also be deleted from the control panel or from HP Web JetAdmin and HP JetAdmin software. repeatedly until QUICK COPY JOBS MENU appears. Press...

  • Page 483: Proofing And Holding A Job, Printing The Remaining Copies Of A Held Job

    Proofing and Holding a Job The proof and hold feature provides a quick and easy way to print and proof one copy of a job and then print the additional copies. To permanently store the job and prevent the printer from deleting it when space is needed for something else, select the Stored Job option in the driver.

  • Page 484: Deleting A Held Job

    Deleting a Held Job When a user sends a proof and hold job, the printer automatically deletes that user’s previous stored proof and hold job. If there is not a proof and hold job already stored for that job name and the printer needs additional space, the printer may delete other stored proof and hold jobs starting with the oldest one.

  • Page 485: Printing A Private Job, Specifying A Private Job, Releasing A Private Job

    Printing a Private Job The private printing feature lets a user specify that a job is not printed until that user releases it using a 4-digit personal identification number (PIN) through the printer’s control panel. The user specifies the PIN in the driver and it is sent to the printer as part of the print job.

  • Page 486: Deleting A Private Job

    Deleting a Private Job A private job is automatically deleted from the printer’s hard disk after the user releases it for printing, unless the user selects the Stored Job option in the driver. Note If you turn the printer off and then back on, all quick copy, proof and hold, and private jobs are deleted.

  • Page 487: Storing A Print Job, Printing A Stored Job

    Storing a Print Job The user can download a print job to the printer’s hard disk without printing it. The user can then print the job at any time through the printer’s control panel. For example, a user may want to download a personnel form, calendar, time sheet, or accounting form that other users can access and print.

  • Page 488: Deleting A Stored Job

    Deleting a Stored Job Jobs stored on the printer’s hard disk can be deleted from the control panel. repeatedly until PRIVATE/STORED JOBS MENU Press [Menu] appears. Press [Item] until the desired user name appears. Note If you are using a Macintosh computer, the user name appears on the first line of the display and the job name appears on the second line of the display.

  • Page 489: Printing With The Optional Hp Fast Infrared Receiver, Setting Up To Print With Windows 9x

    FIR port. Note For more information, see the user guide that came with the HP Fast InfraRed Receiver. Setting Up to Print with Windows 9x...

  • Page 490: Interrupting And Resuming Printing

    40 seconds. (This block could be a hand, paper, or even direct sunlight.) Depending on the size of the job, printing with the HP Fast InfraRed Receiver may be slower than printing with a cable connected directly to the parallel port.

  • Page 491: Printer Maintenance

    Printer Maintenance Overview This chapter explains basic printer maintenance. • Managing the toner cartridge. • Cleaning the printer. • Performing routine maintenance. Chapter 3: Printer Maintenance 77...

  • Page 492: Managing The Toner Cartridge, Toner Cartridge Storage, Toner Cartridge Life Expectancy

    Because they are not HP products, HP cannot influence their design or control their quality. To install a new HP toner cartridge and recycle the used cartridge, follow the instructions included in the toner cartridge box. Toner Cartridge Storage Do not remove the toner cartridge from its package until you are ready to use it.

  • Page 493: Checking The Toner Level, Resetting The Hp Tonergauge

    Resetting the HP TonerGauge After a new toner cartridge is installed, the user must reset the HP TonerGauge from the control panel. When the top cover is closed after installing the new toner cartridge, the NEW TONER CARTRIDGE=NO message is displayed on the control panel for approximately 30 seconds.

  • Page 494: Continue Printing When Toner Is Low

    Continue Printing When Toner Is Low When toner is low, the printer’s control panel displays the TONER LOW message. By default the printer will continue to print when the toner is low. The printer will continue to display TONER LOW until you replace the toner cartridge.

  • Page 495: Redistributing The Toner

    Redistributing the Toner When toner is low, faded or light areas might appear on a printed page. You might be able to temporarily improve print quality by redistributing the toner. The following procedure might allow you to finish the current print job before replacing the toner cartridge.

  • Page 496

    3 Rotate the toner cartridge and gently shake it from side to side to redistribute the toner. Note If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water. (Hot water sets toner into fabric.) 4 Reinsert the toner cartridge into the printer and close the top cover.

  • Page 497: Cleaning The Printer

    Cleaning the Printer To maintain print quality, follow the cleaning procedure (on the following page) every time the toner cartridge is changed, or whenever print quality problems occur. As much as possible, keep the printer free from dust and debris. •...

  • Page 498

    Cleaning the Printer Before beginning these steps, turn the printer off and unplug the power cord. 1 Open the top cover and remove the toner cartridge. WARNING! Avoid reaching too far into the printer. The adjacent fusing area might be hot! Caution To prevent damage to the toner cartridge, do not expose it to light for...

  • Page 499

    4 Replace the toner cartridge, close the top cover, plug in the power cord, and turn the printer on. Note If the message NEW TONER CARTRIDGE = NO appears, ignore the message when removing the toner cartridge to clean the printer. Chapter 3: Printer Maintenance 85...

  • Page 500: Using The Printer Cleaning Page

    Using the Printer Cleaning Page If toner specks appear on the front or back side of your print jobs, follow the procedure below. From the printer’s control panel, do the following: until PRINT QUALITY MENU appears. Press [Menu] until CREATE CLEANING PAGE appears. Press [Item] Press...

  • Page 501: Performing Routine Maintenance

    Performing Routine Maintenance Hewlett-Packard recommends that only HP-authorized service technicians service the printer. However, you should replace certain parts when the PERFORM PRINTER MAINTENANCE message appears on the printer’s control panel display. The maintenance message will appear every 200,000 pages. To check the number of pages the printer has printed, print a configuration page (see page 134).

  • Page 502

    88 Chapter 3: Printer Maintenance...

  • Page 503: Problem Solving

    Problem Solving Overview This chapter will help you to troubleshoot and solve printer problems. Clear paper Occasionally, paper can jam during printing. This section will help you to locate paper jams, properly clear them from the jams: printer, and solve repeated paper jams. Understand Many different messages can appear on the printer’s control panel display.

  • Page 504: Clearing Paper Jams

    Clearing Paper Jams If the printer’s control panel displays a paper jam message, look for paper in the locations indicated in Figure 19, then see the procedure for clearing the paper jam. You might need to look for paper in other locations than indicated in the paper jam message.

  • Page 505

    Paper jams can occur at the following locations: Figure 19 Paper Jam Locations Output areas (top and rear). Go to page 99. Top cover area. Go to page 96. Toner cartridge area. Go to page 98. Input tray area (optional envelope feeder). Go to page 94. Input tray areas.

  • Page 506: Clearing Jams From The Input Tray Areas

    Clearing Jams from the Input Tray Areas Note To remove paper from the Tray 1 area, slowly pull the paper out of the printer. For all other trays, follow the steps below. (See the next page for clearing envelope feeder jams.) 1 Slide the tray out of the printer, and remove any damaged paper from the tray.

  • Page 507

    3 Before replacing the tray, make sure the paper is flat in the tray at all four corners and below the tabs on the guides. 4 Open and close the top cover to clear the paper jam message. If a paper jam message persists, there is still paper in the printer.

  • Page 508: Clearing Jams From The Optional Envelope Feeder

    Clearing Jams from the Optional Envelope Feeder 1 Remove any envelopes loaded in the envelope feeder. Lower the envelope weight and lift the tray extension up to close. 2 Press and hold the release button on the left side of the envelope feeder. Grasp both sides of the envelope feeder and carefully pull it out of the printer.

  • Page 509

    5 Open and close the top cover to clear the paper jam message. If a paper jam message persists, there is still paper in the printer. Look for paper in another location (page 90). Chapter 4: Problem Solving 95...

  • Page 510: Clearing Jams From The Top Cover Area

    Clearing Jams from the Top Cover Area 1 Open the top cover and remove the toner cartridge. Caution To prevent damage to the toner cartridge, do not expose it to light for more than a few minutes. 2 Use the green handle to lift the paper access plate.

  • Page 511

    4 Replace the toner cartridge, and close the top cover. If a paper jam message persists, there is still paper in the printer. Look for paper in another location (page 90). Note If the message NEW TONER CARTRIDGE = NO appears, ignore the message when removing the toner cartridge to clear jams from the printer.

  • Page 512: Clearing Jams From The Toner Cartridge Area

    Clearing Jams from the Toner Cartridge Area 1 If you receive a paper jam message after using all paper jam removal procedures in the user’s guide, open the top cover and remove the toner cartridge. 2 Open Tray 1. 3 Use the green handle to lift the paper access plate and remove any jammed paper.

  • Page 513: Clearing Jams From The Output Areas

    Clearing Jams from the Output Areas Note If most of the paper is still inside the printer, it is best to remove it through the top cover area. Go to page 96. 1 Open the rear output bin. 2 Grasp both sides of the paper, and slowly pull the paper out of the printer.

  • Page 514: Clearing Jams From The Optional Duplexer

    Clearing Jams from the Optional Duplexer 1 Open the duplexer’s rear door. 2 Slowly pull any paper out of the duplexer. 3 Open and close the top cover to clear the paper jam message. 4 If the paper jam message persists, remove the duplexer by lifting it slightly and pulling it out of the printer.

  • Page 515

    6 Slowly pull any paper out of the duplexer. 7 Turn the duplexer over and remove any paper. 8 Insert the duplexer into the printer. 9 Open and close the top cover to clear the paper jam message. If a paper jam message persists, there is still paper in the printer.

  • Page 516: Solving Repeated Paper Jams

    • Check the quality of the paper being printed. Damaged or irregular paper should not be used. • Use only paper that meets HP specifications (pages A-2 through A-14). • Avoid using paper that has already been used in a printer or copier.

  • Page 517: Understanding Printer Messages

    • If a message persists after performing all of the recommended actions, contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) Note Not all messages are described in this user’s guide (many are self-explanatory).

  • Page 518

    DISK FILE Delete files from the EIO disk and then try again. Use HP Resource SYSTEM IS FULL Manager to download or delete files and fonts. (See the software help for more information.)

  • Page 519

    FLASH FILE Delete files from the flash DIMM. Use HP Resource Manager to SYSTEM IS FULL download or delete files and fonts. (See the software help for more information.)

  • Page 520

    Printer Messages (Continued) Message Explanation or Recommended Action INPUT DEVICE An input paper handling device has a condition that needs attention CONDITION xx.yy before printing can resume. See the documentation that came with the paper handling device for assistance. INSTALL TONER The toner cartridge has been removed and must be replaced for CARTRIDGE printing to continue.

  • Page 521

    Delete files and then try again, or turn the printer off, and then turn SYSTEM IS FULL the printer on to delete all files on the device. (Delete files using HP Resource Manager or another software utility. See the software help for more information.)

  • Page 522

    Open and close the top cover to clear the message. If the message persists after all jams have been cleared, a sensor might be stuck or broken. Contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.)

  • Page 523

    PRESS GO TO specification.) CONTINUE This error can occur if the driver you are using is not IEEE-1284 compliant. For best results, use an HP driver that came with the printer (page 20). Press [Go] to clear the error message. (Data will be lost.) If this message persists, contact an HP-authorized service or support provider.

  • Page 524

    PRESS GO TO CONTINUE If this message persists, contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) 50.x FUSER ERROR An internal error has occurred. Turn the printer off, and then turn the printer on.

  • Page 525

    Turn the printer off, and then replace the DIMM that caused the error. If this message persists, contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) 55.xx PRINTER...

  • Page 526

    Turn the printer off, then turn the printer on. If this message persists, contact an HP-authorized service or support alternates with provider. (See the HP Customer Care Service and Support pages at CYCLE POWER TO the front of this user’s guide.) CONTINUE 62.x...

  • Page 527

    NVRAM by removing old areas that are not being used. If this message persists, contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) 69.x A temporary printing error occurred.

  • Page 528: Mopy Disk Error Messages

    The following table lists the disk error numbers reported on either the Printer Collation or Job Storage Disk Error page, which is printed when an error exists. Use the HP Resource Manager for management of the disk (see page 25).

  • Page 529

    • Delete all jobs stored for a user. The firmware will automatically delete the directory for a user with no stored jobs. • Delete other directories on the disk. Disk Error • Contact your HP Service and Support Representative. Chapter 4: Problem Solving 115...

  • Page 530: Correcting Output Quality Problems

    Correcting Output Quality Problems Use the examples below to determine which output quality problem you are experiencing, then see the following table to troubleshoot the problem. Note The examples below depict letter-size paper that has passed through the printer short-edge first. Toner Specks Light Print or Fade Dropouts...

  • Page 531: Troubleshooting Steps

    (page 65). 11. Redistribute the toner in the toner cartridge (page 81). 12. Install a new HP toner cartridge. (See instructions with the toner cartridge.) 13. To alternate small and standard paper, from the Configuration Menu set SMALL PAPER SPEED=SLOW 14.

  • Page 532: Determining Printer Problems, Troubleshooting Flowchart

    If you cannot resolve the problem after following the suggestions in this user’s guide, contact an HP-authorized service or support provider. (See the HP Customer Care Service and Support pages at the front of this user’s guide.) Note Macintosh users: For more troubleshooting information, see page 124.

  • Page 533: Can You Print A Configuration Page

    Can you print a configuration page? Go to step Print a configuration page to verify that the printer is feeding paper correctly (page 134). A message other READY than configuration A blank PRINTING page does not page prints. CONFIGURATION print. is displayed.

  • Page 534

    Can you print from a software application? Go to step Print a short document from a software application. A PS error The job will page or list of not print. commands prints. If the job will not print, and a message is displayed on the control panel, see The printer might page 103 have received a...

  • Page 535

    Does the job print as expected? (Continued on the following page.) Print is garbled Printing Print speed is A control panel or only a stops in the slower than setting is not portion of the middle of expected. taking effect. page prints.

  • Page 536

    Does the job print as expected? (continued) Go to step The print Pages are There are job is not not fed print quality formatted correctly or are problems. correctly. damaged. Check that you are using the proper Make sure paper is loaded correctly Adjust the print printer driver (page 24).

  • Page 537: Does The Printer Select The Proper Trays

    Does the printer select the proper trays, For other output locations, and paper handling problems, accessories? check the Contents, the Index, or the printer software help. An optional The printer A message other accessory is not READY pulls from the than working wrong tray.

  • Page 538: Troubleshooting Flowchart For Macintosh Users

    The PPD might your system, Chooser by printing a configuration page (page 134). have been reinstall the HP Make sure the name of the printer displayed on the renamed. If so, printer software configuration page matches the printer in the Chooser.

  • Page 539: Does The Job Print As Expected

    Verify that the printer the .EPS file to the printer before Chooser. Status name matches the name selected in printing. Use the HP LaserJet Utility messages will be the Chooser (page 126) (page 28). redirected to the...

  • Page 540: Selecting An Alternate Ppd, Renaming The Printer

    Chooser. If you rename the printer after selecting it in the Chooser, you will have to go back into the Chooser and reselect it. Use the Set Printer Name feature in the HP LaserJet Utility to rename the printer. 126 Chapter 4: Problem Solving...

  • Page 541: Troubleshooting The Printer Hard Disk

    DISK IS protected. Use the Windows-based HP LaserJet Resource WRITE PROTECTED Manager or the Macintosh-based HP LaserJet Utility to remove the write protection from the disk. Attempted to use a If you are using PCL, print the PCL Font Page, and verify that the disk-resident font, but font is on the disk.

  • Page 542

    PS Troubleshooting PS Troubleshooting Item Explanation PERSONALITY=AUTO A text listing of PS The control panel setting may have been PERSONALITY commands prints confused by a nonstandard PS code. Check the instead of your PS setting to see if it is set to .

  • Page 543: Troubleshooting Hp Fast Infrared Receiver Problems

    Make sure that the operating system on your computer includes an FIR driver and your application uses an HP LaserJet 4050, 4050 N, 4050 T, 4050 TN, or compatible driver. (Note that complex pages take longer to print.) Position the HP Fast InfraRed Receiver within the range of operation described in the user guide for the HP Fast InfraRed Receiver.

  • Page 544

    Then, reposition the portable device during transmission. within the range of operation described in the user guide for the HP Fast InfraRed Receiver, and print the job again. PS print job will not Check the configuration in the PostScript Tab of Windows: check print.

  • Page 545: Communicating With An Optional Hp Jetdirect Print Server, Hp Jetdirect 10/100tx Print Server

    Communicating with an Optional HP JetDirect Print Server If the printer contains an optional HP JetDirect print server, and you cannot communicate with the printer over the network, verify the operation of the print server. Check the HP JetDirect configuration page.

  • Page 546

    If all cables are correctly connected and the print server still fails to link, follow the steps below to reconfigure the print server: Turn off the printer and remove the HP JetDirect 10/100TX print server. Use jumpers P1, P2, and P3 to manually configure the print...

  • Page 547: Checking The Printer's Configuration

    Checking the Printer’s Configuration From the printer’s control panel, you can print pages that give details about the printer and its current configuration. The following information pages are described here: • Menu Map • Configuration Page • PCL or PS Font List For a complete list of the printer’s information pages, see the Information Menu in the printer’s control panel (page B-4).

  • Page 548

    (DIMMs), paper trays, and printer languages. Note If an HP JetDirect print server card is installed (HP LaserJet 4050 N/4050 TN printers), an HP JetDirect configuration page will print out as well. To print a configuration page: until INFORMATION MENU appears.

  • Page 549

    Figure 21 Sample Configuration Page Printer Information Lists the serial number, HP JetSend IP addresses, page counts, and other information for the printer. Event Log Lists the number of entries in the log, the maximum number of entries viewable, and the last three entries.

  • Page 550: Pcl Or Ps Font List

    PCL or PS Font List Use the font lists to see which fonts are currently installed in the printer. (The font lists also show which fonts are resident on an optional hard disk or flash DIMM.) To print a PCL or PS font list: until INFORMATION MENU appears.

  • Page 551: Service And Support, Warranty Information, Service During And After The Warranty Period

    If you are shipping equipment to be serviced, use the repacking guidelines on the following page. Note See the front of this user’s guide for HP Customer Care Service and Support offerings. Chapter 5: Service and Support 137...

  • Page 552: Guidelines For Repacking The Printer

    If possible, include print samples and 50-100 sheets of paper or any other media that is not printing correctly. • Include a completed copy of the Service Information Form (page 142). • HP recommends insuring the equipment for shipment. 138 Chapter 5: Service and Support...

  • Page 553

    Replacement products may be either new or equivalent in performance to new. 2. HP warrants to you that HP software will not fail to execute its programming instructions after the date of purchase, for the period specified above, due to defects in material and workmanship when properly installed and used.

  • Page 554

    7. TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.

  • Page 555: Limited Warranty For Toner Cartridge Life

    HP toner is depleted. The warranty covers any defects or malfunctions in a new Hewlett-Packard toner cartridge. How long does the coverage The coverage lasts until the HP toner is depleted, at which time the warranty expires. last? TONER LOW How do I know when the HP message on the printer’s control panel display...

  • Page 556: Service Information Form

    Except for contract and warranty service, a purchase order number and/or authorized signature must accompany any request for service. If standard repair prices do not apply, a minimum purchase order is required. Standard repair prices may be obtained by contacting an HP-authorized Repair Center. Authorized signature: ______________________________ Phone: ________________...

  • Page 557: Hp Software License Terms

    The Software is owned and copyrighted by HP or its third party suppliers. Your license confers no title to, or ownership in, the Software and is not a sale of any rights in the Software. HP’s third party suppliers may protect their rights in the event of any violation of these License Terms.

  • Page 558

    License Terms as a condition to the transfer. Termination HP may terminate your license upon notice for failure to comply with any of these License Terms. Upon termination, you must immediately destroy the Software, together with all copies, adaptations, and merged portions in any form.

  • Page 559: Worldwide Sales And Service Offices

    Worldwide Sales and Service Offices Note Before calling an HP Sales and Service office, be sure to contact the appropriate Customer Care Center number listed in the “HP Customer Care Service and Support” section. Products should not be returned to these offices. Product return information is also available through the appropriate HP Customer Care Center in “HP Customer Care...

  • Page 560

    P.O.Box Address: P.O. Box 68 Leipzig 02201 ESPOO Hewlett-Packard GmbH Phone Number: 358-9-8872 2100 Elektronische Meßtechnik Fax: 358-9-8872 2923 Wehlitzer Strasse 2 E-Mail Address: tmodirect@finland.hp.com 04435 Schkeuditz Phone Number: 0180/524-6330 France Fax: 0180/524-6331 Hewlett-Packard France München Test et Mesure Hewlett-Packard GmbH Z.A.

  • Page 561

    N-0212 OSLO Roma Eur Phone Number: +47 22 73 57 59 Fax: +47 22 73 56 19 Hewlett-Packard Italiana S.p.A. E-Mail Address: Viale del Tintoretto, 200 test_measurement@norway.hp.com 00142 Roma Eur Phone Number: (39/6) 54-831 Fax: (39/6) 54-01-661 Poland Torino Hewlett-Packard Polska Hewlett-Packard Italiana S.p.A.

  • Page 562

    164 97 Kista 1231 Ljubljana-Crnuce Phone Number: (46/8) 444 22 77 Phone Number: (386) 61-1895 200 Fax: (46/8) 444 25 25 Fax: (386) 61 1895 201 E-Mail Address: test-measurement@sweden.hp.com Spain Göteborg Hewlett-Packard Sverige AB Barcelona Vädursgatan 6 Hewlett-Packard Española, S.A.

  • Page 563

    RG12 1HN Phone Number: (01) 735 72 36 Phone Number: 01344 366666 Fax: (01) 735 77 03 Fax: 01344 362852 Zürich Contact HP E-Mail Address: uktmo_sales@hp.com Hewlett-Packard (Schweiz) AG Elektronische Meßtechnik In der Luberzen 29 Uzbekistan 8902 Urdorf/Zürich ABM Worldwide Technologies...

  • Page 564

    São Paulo, Brazil Bogotá, Colombia Phone Number: (55-11) 7296-8155/8160 Phone Number: (57-1) 410-1303 Additional phone number(s): Fax: (57-1) 410-1196 HP DIRECT: 0 800 130-266 Fax: (55-11) 7296-8171 Costa Rica Rio de Janeiro COASIN COSTA RICA, S.A. Del Centro Cultural en San Pedro...

  • Page 565: United States

    Miami, FL 33126 Dr. Atl No. 1, Desp. 102 Phone Number: 305-265-5561 Edif. Tepeyac Fax: 305-267-4288 Zona Rio E-Mail Address: britton_bentley@hp.com 22320 Tijuana, B.C. México Phone Number: (66) 34-38-01 Uruguay Fax: (66) 34-38-04 Conatel S.A. Hewlett-Packard de México, S.A. de C.V.

  • Page 566

    Asia and the Pacific China Beijing China Hewlett-Packard Co. Ltd. Australia 5-6/F West Wing Office Melbourne China World Trade Center No. 1 Jian Guo Men Wei Avenue Hewlett-Packard Australia Ltd. Beijing 100004 PRC 31-41 Joseph Street Phone Number: (86-10) 6505-3888 Blackburn, VIC 3130 Fax: (86-10) 6505-1033 Phone Number: 1 800 629 485 (toll free)

  • Page 567

    Bangalore 560001 P.T. Berca Hardayaperkasa Phone Number: (91/80) 225-3024 or 209-1808 Jalan Tengku Angkasa No. 33 Fax: (91/80) 225-6186 Bandung 40132 Telex: 845-2773 HP IN Phone Number: (62-22) 250-8100 Fax: (62-22) 250-6757 Calcutta Jakarta Hewlett-Packard India Pvt. Ltd. 708 Central Plaza P.T.

  • Page 568: New Zealand

    Ground Floor, Wisma Cyclecarri Phone Number: 65 275 3888 288 Jalan Raja Laut Additional phone number(s): 50350 Kuala Lumpur HP Direct: 1 800 292-8100 Phone Number: 1-800-88-8848 Toll Free Application Support: 65-374-4242 Fax: (60/3) 298-9157 Hardware Service Hotline: 65-375-8350 Fax: 65 274 7887...

  • Page 569

    1-3-6 Hakataekiminami Hakata-ku, Fukuoka-shi Taipei 10483 Taiwan Fukuoka 812 Phone Number: (886-2) 712-0404 Hiroshima Fax: (886-2) 718-2928 Hewlett-Packard Japan Ltd. HP DIRECT Basic Tools free tel: 080-212-535 Nissei-Heiwakoen Bldg. 3-25 Nakajima-cho Naka-ku, Hiroshima-shi Thailand Hiroshima 730 Hewlett-Packard (Thailand) Ltd. Hokkaido 23rd-25th floor Vibulthani Tower 2 Hewlett-Packard Japan Ltd.

  • Page 570

    Forum Honjo Bldg. Alger 2-4-1 Honjo, Matsumoto-shi Algerie Nagano 390 Phone Number: 213-2-606450 Osaka Hewlett-Packard Japan Ltd. Angola Chuo Bldg. Handled by HP South Africa 5-4-20 Nishinakajima Yodogawa-ku, Osaka-shi Osaka 532 Bahrain Saitama BAMTEC Hewlett-Packard Japan Ltd. P.O. Box 10373 Mitsui-seimei Omiya Capital centre Miyamachi Bldg.

  • Page 571

    Tel/fax: (3579) 514-256 (Cyprus Based Line) Telex: 4833 Telex: 42309 chacis le Saudi Arabia Malawi Modern Electronics Establishment Handled by HP South Africa P.O. Box 22015 Prince Musad Ibn Abdulaziz St. Mauritius Riyadh 11495 Handled by HP South Africa Phone Number: (966/1) 476-3030...

  • Page 572: South Africa

    Dubai Phone Number: (971/4) 37-75-91 Fax: (971/4) 37-08-99 Emitac Ltd. P.O. Box 2711 Abu Dhabi Phone Number: (971/2) 77-04-19 Fax: (971/2) 72-30-58 Zambia Handled by HP South Africa Zimbabwe Handled by HP South Africa 158 Chapter 5: Service and Support...

  • Page 573: Specifications

    Specifications Overview This appendix includes: • Paper specifications • Printer specifications • Cable specifications Specifications A-1...

  • Page 574

    • premature wear on the printer, requiring repair Note For best results, use only HP brand paper and print media. Hewlett-Packard Company cannot recommend the use of other brands. Because they are not HP products, HP cannot influence or control their quality.

  • Page 575: Supported Sizes And Weights Of Paper

    Supported Sizes and Weights of Paper Supported Sizes and Weights of Paper, Tray 1 Tray 1 Dimensions* Weight Capacity** Minimum Size 3 by 5 in*** (custom) (76 by 127 mm) 16 to 53 lb 100 sheets of 20 lb (60 to 199 g/m (75 g/m ) paper 8.5 by 14 in...

  • Page 576

    Supported Sizes and Weights of Paper, Tray 2 (HP LaserJet 4050 T/4050 TN) Trays 2 and 3 (HP LaserJet Dimensions* Weight Capacity** 4050 T/ 4050 TN) 8.5 by 11 in Letter (216 by 279 mm) 8.3 by 11.7 in (210 by 297 mm) 7.3 by 10.5 in...

  • Page 577

    Supported Sizes and Weights of Paper, Optional 500-Sheet Tray Optional Dimensions* Weight Capacity** 500-Sheet Tray 8.5 by 11 in Letter (216 by 279 mm) 8.3 by 11.7 in (210 by 297 mm) 7.3 by 10.5 in Executive (191 by 267 mm) Executive (JIS) 8.5 by 13 in (custom***)

  • Page 578

    Supported Sizes and Weights of Paper, Optional Envelope Feeder Optional Envelope Dimensions* Weight Capacity** Feeder 3.5 by 6.3 in Minimum Size (90 by 160 mm) 20 to 28 lb 75 envelopes (75 to 105 g/m 7 by 10 in Maximum Size (178 by 254 mm) * The printer supports a wide range of paper sizes.

  • Page 579

    Supported Types of Paper The printer supports the following types of paper: • • plain preprinted • • letterhead transparency • • prepunched labels • • bond recycled • • color card stock • • rough user-defined (5 types) Guidelines for Using Paper For best results, use conventional 20 lb (75 g/m ) paper.

  • Page 580

    Note Do not use letterhead paper that is printed with low-temperature inks, such as those used in some types of thermography. Do not use raised letterhead. The printer uses heat and pressure to fuse toner to the paper. Make sure that any colored paper or preprinted forms use inks that are compatible with the printer’s temperature (400°...

  • Page 581

    Paper Weight Equivalence Table Use this table to determine approximate equivalent points in weight specifications other than U.S. bond weight. For example, to determine the equivalent of 20 lb U.S. bond weight paper in U.S. cover weight, locate the bond weight (in row 3, second column) and scan across the row to the cover weight (in the fourth column).

  • Page 582: Label Construction

    Labels Caution To avoid damaging the printer, use only labels recommended for use in laser printers. If you have problems printing labels, use Tray 1 and open the rear output bin. Never print on the same sheet of labels more than once. Label Construction When selecting labels, consider the quality of each component: •...

  • Page 583: Envelope Construction

    Envelopes Envelope Construction Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes depends upon the quality of the envelopes. When selecting envelopes, consider the following components: •...

  • Page 584: Envelopes With Adhesive Strips Or Flaps

    Envelopes with Double-Side-Seams Double-side-seam construction has vertical seams at both ends of the envelope rather than diagonal seams. This style may be more likely to wrinkle. Be sure the seam extends all the way to the corner of the envelope as illustrated below. Acceptable Unacceptable Figure A-1...

  • Page 585

    Envelope Margins The following table gives typical address margins for a Commercial #10 or DL envelope. Type of Address Top Margin Left Margin Return Address 0.6 in (15 mm) 0.6 in (15 mm) Delivery Address 2 in (51 mm) 3.5 in (89 mm) Note For the best print quality, position margins no closer than 0.6 inch (15 millimeters) from the edges of the envelope.

  • Page 586: Card Stock Construction, Card Stock Guidelines

    Card Stock Construction • Smoothness: 36-53 lb (135-199 g/m ) card stock should have a smoothness rating of 100-180 Sheffield. 16-36 lb (60-135 g/m ) card stock should have a smoothness rating of 100-250 Sheffield. • Construction: Card stock should lie flat with less than 0.2 inch (5 millimeters) of curl.

  • Page 587: Printer Specifications, Physical Dimensions

    15.5 inches (38.5 cm) with cover closed Figure A-2 Printer Dimensions Printer Weight (without toner cartridge) • HP LaserJet 4050/4050 N printers: 39.27 lb (17.85 kg) • HP LaserJet 4050 T/4050 TN printers: 45.66 lb (20.71 kg) Specifications A-15...

  • Page 588: Environmental Specifications, Electrical Specifications

    Environmental Specifications Electrical Specifications Printer State Power Consumption (average, in watts) Printing Standby PowerSave (default activation time 30 minutes) Minimum Recommended Circuit Capacity 100-127 Volt 8 amps 220-240 Volt 4 amps Power Requirements (Acceptable Line Voltage) 100-127 Volt 50-60 Hz 220-240 Volt 50-60 Hz A-16 Specifications...

  • Page 589: General Specifications

    Acoustic Emissions (Per ISO 9296) Printer State Sound Power* Printing, 17 pages per minute (ppm) = 6.6 bels (A) Printing, 8 ppm = 6.2 bels (A) PowerSave = 0 bels (A) * You might want to install printers with sound power Lwad>=6.3 bels (A) or more in a separate room or cubicle.

  • Page 590: Serial Cable Specifications

    Transmission is asynchronous, with one start bit, eight data bits and Data Format one stop bit. Parity is not used. HP LaserJet printers are DTE devices. Serial Interface Handshaking is the method by which the flow of data between two Protocol devices is controlled.

  • Page 591

    Ready. In either case, the sender delays transmitting data until the receiver is ready. Hewlett-Packard offers the following serial cables and adapter for use with the printer: HP Part Number Description C2932A 9 to 9-pin M/F RS-232 Serial Cable, 3m...

  • Page 592

    DB-9 Serial Cable Pin Outs (C2932A) Computer DB-9 Printer DB-9 (male cable end) 2- Receive Data 2- Transmit Data 3- Transmit Data 3- Receive Data 4- Data Terminal Ready 4- Data Set Ready 5- Ground 5- Ground 6- Data Set Ready 6- Data Terminal Ready 8- Clear to Send 8- Data Terminal Ready...

  • Page 593

    Control Panel Menus Overview You can perform most routine printing tasks from the computer through the printer driver or software application. This is the most convenient way to control the printer, and will override the printer’s control panel settings. See the help files associated with the software, or for more information on accessing the printer driver, see page 23.

  • Page 594

    Quick Copy Jobs Menu This menu provides a list of the quick copy jobs stored on the printer’s hard disk. The user can print or delete these jobs from the control panel. See “Job Retention Features” on page 67 and “Proofing and Holding a Job”...

  • Page 595

    Private/Stored Jobs Menu This menu provides a list of the private and stored jobs on the printer’s hard disk. The user can print or delete these jobs from the control panel. See “Printing a Private Job” on page 71 and “Storing a Print Job”...

  • Page 596

    PRINT The configuration page shows the printer’s current configuration. If CONFIGURATION an HP JetDirect print server card is installed (HP LaserJet 4050 N/4050 TN printers), a JetDirect configuration page will print out as well. For more information, see page 134.

  • Page 597

    Paper Handling Menu When paper handling settings are correctly configured through the control panel, you can print by choosing the type and size of paper from the printer driver or software application. For more information, see page 65. Some items in this menu (such as duplex and manual feed) can be accessed from a software application, or from the printer driver (if the appropriate driver is installed).

  • Page 598

    For supported This item appears only when a fourth paper tray PLAIN paper types, see is installed (available only on the HP LaserJet page 66. 4050 T/4050 TN printers). Set the value to correspond with the paper type currently loaded in Tray 4.

  • Page 599

    Paper Handling Menu (Continued) Item Values Explanation CONFIGURE [TYPE]= NORMAL This item appears only when FUSER MODE MENU=YES NORMAL . Most paper types are NORMAL set to by default. HIGH The exception is as follows: ROUGH=HIGH TRANSPARENCY=LOW HIGH settings are only available with A4, letter, and legal sizes.) For a complete list of supported paper types, see page 66.

  • Page 600

    (17 ppm). 300 dpi (dots per inch) is PRORES 1200 recommended for some bitmapped fonts and graphics, and for compatibility with the HP LaserJet III family of printers. : Produces high print quality at the printer’s full speed (17 ppm). FASTRES 1200 : Produces optimum print quality (comparable to 1200 dpi) at the printer’s...

  • Page 601

    50%. Caution HP does not recommend full-time use of EconoMode. (If EconoMode is used full-time, it is possible that the toner supply will outlast the mechanical parts in the toner cartridge.)

  • Page 602

    Printing Menu Some items in this menu can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override control panel settings. For more information, see page 59. Printing Menu Item Values...

  • Page 603

    Printing Menu (Continued) Item Values Explanation CONFIGURE UNIT OF MEASURE= INCHES This item appears only when CUSTOM PAPER=YES INCHES MILLIMETERS . Select the unit of measurement for the custom paper size. (110V printers) MILLIMETERS (220V printers) X DIMENSION= CONFIGURE For supported paper This item appears only when 8.50INCHES CUSTOM PAPER=YES...

  • Page 604

    Printing Menu (Continued) Item Values Explanation PCL FONT NUMBER= The printer assigns a number to each font and lists them on the PCL Font List (page 136). The font number appears in the Font # column of the printout. Note It is best to set the font nnumber from the printer driver or software application.

  • Page 605

    REGULAR Select the version of Courier font to use: DARK REGULAR : The internal Courier font available on the HP LaserJet 4 series printers. DARK : The internal Courier font available on the HP LaserJet III series printers. Both fonts are not available at the same time.

  • Page 606

    Configuration Menu Items in this menu affect the printer’s behavior. Configure the printer according to your printing needs. Configuration Menu Item Values Explanation POWERSAVE= Set the printer to enter PowerSave after it has 30 MINUTES 15 MINUTES been idle for a specified amount of time. Turning PowerSave off is not recommended.

  • Page 607

    Configuration Menu (Continued) Item Values Explanation RESOURCE SAVE= Dedicate printer memory to save each language’s permanent resources. (You might need to add memory to the printer in order for AUTO this item to appear.) The amount of memory set aside can be different for each installed language.

  • Page 608

    Configuration Menu (Continued) Item Values Explanation 21 PAGE TOO PAGE PROTECT= AUTO This item appears only after a COMPLEX, PRESS GO TO CONTINUE AUTO message displays (page 108). Memory Enhancement technology (MEt) attempts to guarantee that all pages will print. PAGE PROTECT If the page does not print, turn .

  • Page 609

    Configuration Menu (Continued) Item Values Explanation RAM DISK=OFF Determine how the RAM disk is configured. This item appears only if there is no optional hard disk installed and the printer has at least AUTO 16MB of memory. : The RAM disk is disabled. : The RAM disk is enabled.

  • Page 610

    This item allows the user to tell the printer that CARTRIDGE=NO a new toner cartridge has been installed. Setting this item to will reset the HP TonerGauge to full. QUICK COPY Specifies the number of quick copy jobs that JOBS=32 can be stored on the printer’s hard disk.

  • Page 611

    I/O Menu Items in the I/O (input/output) Menu affect the communication between the printer and the computer. I/O Menu Item Values Explanation I/O TIMEOUT=15 Select the I/O timeout period in seconds. (I/O timeout refers to the time, measured in seconds, that the printer waits before ending a print job.) This setting allows you to adjust timeout for best performance.

  • Page 612

    I/O Menu (Continued) Item Values Explanation PARALLEL HIGH Select the speed at which data is transmitted SPEED=YES to the printer. : The printer accepts faster parallel communications used for connections with newer computers. : The printer accepts slower parallel communications used for connections with older computers.

  • Page 613

    EIO (enhanced input/output) Menus depend on the particular accessory product installed in an EIO slot of the printer. If the printer contains an HP JetDirect print server EIO card, you can configure basic networking parameters using the EIO Menu. These and other parameters can also be configured through HP JetAdmin and HP Web JetAdmin.

  • Page 614

    EIO Menu (Continued) Item Values Explanation CFG TCP/IP=NO The TCP/IP Menu is not accessible. : The TCP/IP Menu appears. In the TCP/IP BOOTP=YES Menu, you can specify for TCP/IP parameters to be automatically loaded from a bootp or DHCP server when the printer is BOOTP=NO turned on.

  • Page 615

    Resets Menu Use this menu with caution. You can lose buffered page data or printer configuration settings when you select these items. Only reset the printer under the following circumstances: • You want to restore the printer’s default settings. • Communication between the printer and computer has been interrupted.

  • Page 616

    Resets Menu Item Explanation RESET MEMORY This item clears the printer buffer and the active I/O input buffer, and makes the control panel defaults current. Resetting memory during a print job can result in data loss. RESTORE FACTORY This item performs a simple reset and restores most of the factory SETTINGS (default) settings.

  • Page 617: Printer Memory And Expansion

    Note Single in-line memory modules (SIMMs) used on previous HP LaserJet printers are not compatible with the printer. You might want to add more memory to the printer if you often print complex graphics or PS documents, print with the optional duplexer, use many downloaded fonts, or print at ProRes 1200.

  • Page 618

    The printer has two enhanced input/output (EIO) slots for expanding the printer’s capabilities with: • A network card. • A mass storage device, such as a hard disk. For ordering information, see page 9. To find out how much memory is installed in the printer, or to find out what is installed in the EIO slots, print a configuration page (page 134).

  • Page 619: Installing Memory

    Installing Memory Caution Static electricity can damage dual in-line memory modules (DIMMs). When handling DIMMs, either wear an antistatic wrist strap or frequently touch the surface of the DIMM’s antistatic package, then touch bare metal on the printer. If you have not already done so, print a configuration page to find out how much memory is installed in the printer before adding more memory...

  • Page 620

    5 Remove the DIMM from the antistatic package. Hold the DIMM with fingers against the side edges and thumbs against the back edge. Align the notches on the DIMM with the DIMM slot. (Check that the locks on each side of the DIMM slot are open, or outward.) 6 Press the DIMM straight into the slot (press firmly).

  • Page 621: Checking Memory Installation

    Checking Memory Installation Follow this procedure to verify that DIMMs are installed correctly: 1 Check that the printer’s control panel displays READY when the printer is turned on. If an error message appears, a DIMM might have been incorrectly installed. Check the printer messages (page 103).

  • Page 622: Adjusting Memory Settings, Resource Saving

    Adjusting Memory Settings Resource Saving Resource Saving allows the printer to keep downloaded resources (permanent downloaded fonts, macros, or patterns) in memory when the printer language or resolution is changed. If you do not have an optional hard disk or flash DIMM for storing downloaded resources, you might want to change the amount of memory allocated to each language when downloading an unusually large number of fonts, or if the printer is in a shared...

  • Page 623

    I/O Buffering To allow the computer to continue working without waiting for the print job to finish queuing, the printer uses a portion of its memory (an I/O buffer) to hold jobs in progress. (If I/O buffering is off, no memory is reserved for this function.) In most cases, it is best to let the printer automatically reserve memory for I/O buffering.

  • Page 624

    HP is constantly introducing new software tools for use with your printer and accessories. These tools are available from the Internet free of charge. See page viii for how to visit the HP website for more information. After you have installed a new device, print a configuration page.

  • Page 625: Printer Commands

    PCL 5e command structure. HP-GL/2 The printer has the ability to print vector graphics using the HP-GL/ 2 graphics language. Printing in the HP-GL/2 language requires that the printer leave PCL 5e language and enter HP-GL/2 mode, which can be done by sending the printer PCL 5e code.

  • Page 626: Understanding Pcl 5e Printer Command Syntax

    Understanding PCL 5e Printer Command Syntax Before using printer commands, compare these characters: Lowercase l: Uppercase O: Number one: Number 0: Many printer commands use the lowercase letter l (l) and the number one (1), or the uppercase letter O (O) and the number zero (0).

  • Page 627: Combining Escape Sequences

    Combining Escape Sequences Escape sequences may be combined into one escape sequence string. There are three important rules to follow when combining code: The first two characters after the ? character (the parameterized and group characters, see Figure D-1) must be the same in all of the commands to be combined.

  • Page 628: Entering Escape Characters

    Entering Escape Characters Printer commands always begin with the escape character (?). The following table shows how the escape character can be entered from various DOS software applications. DOS Software Application Entry What Appears \027 Lotus 1-2-3 and Symphony Type ←...

  • Page 629: Selecting Pcl 5e Fonts

    Selecting PCL 5e Fonts PCL 5e printer commands for selecting fonts can be found on the PCL 5e Font List (page 136). A sample section is shown below. Notice the two variable boxes for symbol set and point size. These variables must be filled in or the printer will use defaults. For example, if you want a symbol set that contains line-draw characters, select the 10U (PC-8) or 12U (PC-850) symbol set.

  • Page 630: Common Pcl 5e Printer Commands

    Common PCL 5e Printer Commands Common PCL 5e Printer Commands Function Command Options (#) Reset Number of Copies ?&l#X 1 to 999 2-sided/1-sided printing ?&l#S 0 = Simplex (1-sided) printing 1 = Duplex (2-sided) with long edge binding 2 = Duplex (2-sided) with short edge binding Paper Source ?&l#H 0 = prints or ejects current page...

  • Page 631

    Display Functions Off Enter PCL 5e Mode ?%#A 0 = Use previous PCL 5e cursor position 1 = Use current HP-GL/2 pen position Enter HP-GL/2 Mode ?%#B 0 = Use previous HP-GL/2 pen position 1 = Use current PCL 5e cursor position...

  • Page 632

    Function Command Options (#) Symbol Sets 8U = HP Roman-8 Symbol Set 10U = IBM Layout (PC-8) (code page 437) Default Symbol Set 12U = IBM Layout for Europe (PC-850) (code page 850) 8M = Math-8 19U = Windows 3.1 Latin 1 9E = Windows 3.1 Latin 2 (commonly used in Eastern Europe)

  • Page 633: Regulatory Information

    Consult your dealer or an experienced radio/TV technician. Note Any changes or modifications to the printer that are not expressly approved by HP could void the user’s authority to operate this equipment. Use of a shielded interface cable is required to comply with the Class B limits of Part 15 of FCC rules.

  • Page 634: Protecting The Environment

    Environmental Product Stewardship Protecting the Environment Hewlett-Packard Company is committed to providing quality products in an environmentally-sound manner. The HP LaserJet printer has been designed with several attributes to minimize impacts on the environment. This HP LaserJet printer eliminates: •...

  • Page 635

    The design of this HP LaserJet printer facilitates the recycling of: • Plastics Plastic housing parts have markings according to international standards that enhance the ability to identify plastics for recycling purposes at the end of the printer’s life.

  • Page 636

    • Paper This printer is suited for the use of recycled papers when the paper meets the guidelines outlined in the HP LaserJet Printer Family Paper Specification Guide . See page 11 for HP LaserJet Printer Family Paper Specification Guide ordering information.

  • Page 637: Material Safety Data Sheets

    HP LaserJet website at: http:// www.ljsupplies.com/planetpartners/datasheets.html. If you do not have access to the Internet, call the U.S. HP FIRST (fax-on-demand service) at (800) 231-9300. Use Index number 7 for a listing of the Toner Cartridge/Drum Material/Chemical Safety Data Sheets.

  • Page 638: Declaration Of Conformity

    Hewlett-Packard Company Manufacturer’s Address: 11311 Chinden Boulevard Boise, Idaho 83714-1021, USA declares that the product Product Name: HP LaserJet 4050, 4050 T, 4050 N, 4050 TN Model Numbers: C4251A, C4252A, C4253A, C4254A Product Options: conforms to the following Product Specifications: Safety:...

  • Page 639: Safety Statements

    Safety Statements Laser Safety Statement The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. The printer is certified as a “Class 1”...

  • Page 640

    överskrider gränsen för laserklass 1. HUOLTO HP LaserJet 4050, 4050 T, 4050 N, 4050 TN -kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu henkilö.

  • Page 641

    (Paper types include letterhead, prepunched, recycled, bond, color stock, card stock, and preprinted.) Mopier An HP LaserJet printer equipped to deliver multiple original prints (or generate copies of a print job). PCL 5e/6 HP’s printer control language.

  • Page 642

    printer driver help On-screen instructions regarding the use of the printer driver. printer software Any or all of the software shipped with the printer. The printer is packaged with a compact disc containing the software needed to access all of the printer’s features. If the printer has been correctly set up, the appropriate software is already installed.

  • Page 643

    Index Numerics 103, B-16 clearing 1200 dpi B-8 Background Printing paper jams 90–102 250-sheet tray (Macintosh) 125 persistent messages 103 loading 37 backlight, turning off B-14 collation (mopying) 59 ordering 8 Bad Duplexer Connection combining escape sequences paper orientation 46 message 104 paper specifications A-4 basic printing tasks 31–58...

  • Page 644

    136 troubleshooting 120 stewardship E-2–E-5 troubleshooting (Macintosh) Macintosh 124 environmental specifications Windows 22 A-16–A-17 FontSmart, see HP FontSmart dropouts, troubleshooting equivalent weights to US form, Service Information 142 116–117, A-7 paper A-9 format problems, error log, see event log duplex printing accessory troubleshooting 121–122...

  • Page 645

    HP Fast InfraRed Receiver HP JetSend 26 control panel 12 about 75 mass storage devices C-8 turning off (PowerSave) HP FIRST, see front pages xi memory C-3–C-5 B-14 HP FontSmart 25, C-8 software 17 lines, troubleshooting 116– HP JetAdmin 17, 29, 66...

  • Page 646

    90–102 124–125 converting paper weights networks maintaining the printer 77–87 HP JetAdmin 17, 29 maintenance kit 11, 87 creases, troubleshooting ordering I/O cards 10 maintenance message 87 116–117 software for 17, 29 Maintenance Message setting curl, troubleshooting 116–...

  • Page 647

    parts, locating 4 control panel layout 12–15 from Tray 1 48, A-11 diagnostics 29 with feeder 49–51 allocating memory to C-6 dimensions A-15 first page on different paper commands D-1–D-8 drivers 17–24 printing font list 136, B-4 drivers, Macintosh 28 font list 136 selecting fonts D-5 errors, troubleshooting 89–...

  • Page 648

    ProRes 1200 B-8 return 137–138, 142 HP FontSmart 25 configure B-18 RIP ONCE HP JetAdmin 17, 29 about 60 HP JetSend 26 allocating memory to C-6 HP LaserJet Utility for drivers Macintosh 28 function 24 included with printer 17 safety...

  • Page 649

    89–136 checking toner level 79 flowchart 118–125 wrong tray, troubleshooting new 78, 117, 119, B-18 Macintosh 124–126 resetting HP TonerGauge paper jams 90–102 print quality problems 116– toner cartridges 78–81 117, A-7 life expectancy 78 printer messages 103–113...

  • Page 650

    8 Index...

  • Page 651

    May 1998 Edition HP LaserJet Family Quick Reference Service Guide Volume I...

  • Page 652: Service Guide

    HP LaserJet Family Quick Reference Service Guide Volume I...

  • Page 653

    © Copyright Hewlett-Packard Trademark credits Company 1998 Adobe and PostScript are registered All Rights Reserved. trademarks of Adobe Systems, Inc., Reproduction, adaptation, or which may be registered in certain jurisdictions. translation without prior written permission is prohibited, except ® Microsoft is a U.S.

  • Page 654

    Contents Control panel messages ..... . . 7 Service mode ....... 73 Power supply .

  • Page 655

    Service manuals for HP LaserJet products are available from the HP Support Materials Organization (SMO). The Service Parts Order Desk number is: (800) 227-8164 (U.S. Only) If you are located outside of the U.S., contact your local HP Sales and Service office.

  • Page 656

    Printer Name Printer Abbreviation HP LaserJet Companion LJ Companion (minimal support only) HP LaserJet 6L LJ 6L HP LaserJet 5Si Mopier LJ 5Si Mopier HP LaserJet 5Si/5Si MX LJ 5Si LJ 5Si MX HPLaserJet 5L LJ 5L HP LaserJet 6P/6MP...

  • Page 657

    Reference Model Number Maximum Service Manual Name Used Pages per Part Number in this Guide Month LJ 6L C3990A C3990-99001 5Si Mopier, C3166A/C3167A 100K C4077-99015 LJ5Si MX/5Si* C4076A/C4077A LJ 5L C3941A C3990-99001 LJ 6P/6MP* C3150A/C3155A/ C3980-99001 5P/5MP* C3980A/C3982A LJ 5/5M*/5N C3916A/C3917A/ C3916-90984 C3952A...

  • Page 658

    Overview This chapter provides information on the display lights on the HP LaserJet 6L, 5L, 6P, 5P, and 4L printers and includes illustrations and detailed error codes for all printers. Error codes are listed as they appear on the printer display. Not all codes are included as many are self-explanatory.

  • Page 659: Status Messages

    LJ 6L, 5L Printer Light-Emitting Diode (LED) Displays See the legend that follows for a description of the error and the action to remedy it. STATUS MESSAGES Error LED is on. Error LED is 3. All LEDs are 4. Data LED is blinking.

  • Page 660

    Legend (6L, 5L Display Lights) Status Messages Item Description Recommended Action Paper out See page 21 Door open See page 18 No Electro-photographic (EP) cartridge See page 32 Paper jam See page 26 Memory error See page 34 Incompatible memory card See page 49 Manual feed See page 70...

  • Page 661

    LJ 6P Printer LED Displays See the legend that follows for a description of the error and the action to remedy it. If both the error and data lights are lit, simultaneously [Go] [Reset/Job[Cancel] press to display the Data Error pattern. LJ 6P Printer LED Displays STATUS Error...

  • Page 662

    Legend (6P Display Lights) Status Messages Item Description Recommended Action Paper out (Tray 1) See page 21 Paper out (Tray 2) See page 21 Printer open See page 18 No toner cartridge See page 32 Paper jam See page 20 Manual feed See page 70 Continuable Errors...

  • Page 663

    SIMM Errors Remove all SIMMs and power cycle the printer. Retry the operation. Replace the SIMMs one at a time to locate the defective module. Refer to the Service Manual for details. Item Description Recommended Action Error 53-0 ROM error See note below Error 53-1 RAM error See note below...

  • Page 664

    LJ 5P Printer LED Displays See the legend that follows for a description of the error and the action to remedy it. If both the error and data lights are lit, simultaneously [Go] [Reset] press to display the Data Error pattern. LJ 5P Printer LED Displays STATUS Error...

  • Page 665

    Legend (5P Display Lights) Status Messages Item Description Recommended Action Paper out (Tray 1) See page 21 Paper out (Tray 2) See page 21 Printer open See page 18 No toner cartridge See page 32 Paper jam See page 20 Continuable Errors [Go] [Reset]...

  • Page 666

    SIMM Errors Item Description Recommended Action Error 53-0 ROM error See note below Error 53-1 RAM error See note below Note Remove all SIMMs and power cycle the printer. Retry the operation. Replace the SIMMs one at a time to locate the defective module. Refer to the Service Manual for details.

  • Page 667: Recoverable Errors

    LJ 4L Printer LED Displays Recoverable Errors For more details, see the page number provided. Error Paper Data Ready LED Legend RECOVERABLE ERRORS (Displayed on single lights) Paper Out Printer Open Paper Jam 21 Print Overrun (See page 23) (See page 24) (See page 26) (See page 35) Paper LED on...

  • Page 668

    4L-Specific Error Configurations Priority of Errors Each error has a priority in relation to the others. If more than one error condition occurs at the same time, the highest priority error will be displayed. The priority of errors is as follows: Service Errors 1 Formatter PCA 2 RAM...

  • Page 669: Error Codes

    Error Codes Clear Staple Jam 5Si Mopier • Clear the jam. • Check the staple cartridge. • Check the stapler and cabling. • Check the stapling unit control’s printed-circuit assembly (PCA). • Replace the entire stapling unit as required. Close Printer Cover/Printer Open All Printers •...

  • Page 670: Install Tray 2

    Install Toner Cartridge/No Cartridge All Printers • Reseat or install a new toner cartridge. • The high voltage contacts are dirty or defective. • The high voltage power supply is defective. LJ 5 • The DC Controller is defective. Install Tray 2 LJ 5 •...

  • Page 671

    Output Operation Condition x.yy 5Si Mopier x=output device number yy=condition code For the multibin mailbox: 01 = face-up tray not installed Note See also the section on troubleshooting the 2,000-sheet input unit and multibin mailbox/mailbox with stapler. Remove Paper Jam LJ 5 •...

  • Page 672: Toner Low

    Stapler Align Error 5Si Mopier • Remove the paper from the stapler and re-send the job. Stapler Malfunction 5Si Mopier • Clear the stapler jam and re-send the job. Stapler Supply Out 5Si Mopier • Load a new staple cartridge. Toner Low 5Si, 5 •...

  • Page 673

    Warming Up 5Si, 5 • Separate all accessories. • Power cycle the printer. • The formatter PCA is defective. • The DC controller is defective. • The power supply is defective. 02 Warming Up (if 3 Minutes)—See also 50 Error •...

  • Page 674

    11 Paper Out (MP/PC/UC/LC/EC/LE LOAD) All Printers • The paper tray is empty or is seated incorrectly. • The sensor arm is stuck or broken. • The tray-size sensing or configuration is defective. – Verify the tray tabs and switches are at the right rear (or right front) of the tray slot, or configure the tray from the control panel.

  • Page 675: Printer Open

    12 Printer Open All Printers (Exceptions: 4P, IIIP, IIP Plus, IIP) • The printer door is open. – Check that the toner cartridge is fully seated and that the cover is firmly closed. • A DC power supply malfunction or DC controller malfunction occurred.

  • Page 676

    12 Open or No EP • The top cover is open. • The toner cartridge is not installed. • There is a defective interlock switch assembly. • Part of the top door that pushes the plunger down is broken. • The top door switch (plunger assembly) is broken.

  • Page 677

    13 Paper Jam/Remove Paper Jam All Printers • The media does not meet HP specifications. • The paper path is dirty or obstructed. – Clean the paper path components; ensure that the transfer roller is seated properly. • The pickup (or other) rollers and/or the separation pad is worn.

  • Page 678

    5L, 6P, 5P • If all of the flags move properly and the connectors are seated, but the error persists, replace the DC controller. 6P, 5P • There are paper fragments under the oblique rollers (top or front). – Remove the rollers and the paper fragments. •...

  • Page 679

    IIID, III, IID, II • The registration assembly is defective. • The fuser is defective. IIID, IID • The duplex paper path is obstructed or contains worn components. • The switchback assembly is misadjusted or bent. III, II • The sensor cable is defective. –...

  • Page 680

    13.1 Internal, 13.2 Input, 13.3 Duplex, 13.4 Output 4Si, IIISi • Media is not picked up, or media is jammed in the printer. – Check and clean the entire paper path. • Media is in the duplex unit. – Check the paper input path and paper re-feed from the sensor PS2 duplex unit.

  • Page 681: X Paper Jam

    13.x Paper Jam Note When troubleshooting the LJ 5Si, always troubleshoot the error log message. See the LJ 5Si service manual for detailed error log information. X=Location of jam 0=Non-specific jam 1=Paper feed/paper late jam—paper late arriving at PS 2, which is located in the paper pickup unit.

  • Page 682

    11=External input device paper jam If the control panel displays a 13.11 paper jam message, the printer will list additional error codes in the error log. These can be printed or viewed. A 2000-Sheet Input Tray Paper Jam error is related to the first device in the C-Link daisy chain.

  • Page 683

    14 No EP Cartridge or No Toner Cartridge All Printers • A toner cartridge is not installed or the cartridge is not fully seated. • The sensitivity tabs are missing (except 4 Plus, LJ 4, and 2686). Replace the toner cartridge. •...

  • Page 684

    16 Toner Low All Printers • The toner in the toner cartridge is uneven. • The toner cartridge contact points are malfunctioning. • The HV power supply is defective. 4Si, IIISi • The door-open sensor flag is defective. – Replace the PS1. •...

  • Page 685

    18 MIO Initialization All Printers • The error message remains on after 5 minutes. – Check the network card or host. 20 Error/Memory Overflow All Printers • A large print job exceeds memory capacity. – Verify that the SIMMs are seated. Add memory, remove soft fonts, decrease resolution, or simplify the print job.

  • Page 686

    • The print job is too complex. – Turn Image Adapt and Page Protect to On or Auto. (This can be set within the HP Explorer remote control panel.) • There is not enough memory. – Add the optional memory module.

  • Page 687

    • The printer I/O port is damaged. – Replace the I/O PCA or formatter PCA. • A non-HP modular input/output (MIO) device is being used. – Replace with an HP MIO device. 6P, 5P, 5, 4 Plus • The computer and printer are not communicating because of improper signal protocols.

  • Page 688

    23 I/O Not Ready All Printers • The I/O card is unable to accept data or it is not connected to the network. – Check the I/O card seating and replace if necessary. 24 Job Memory Full All Printers • There is too much data or the data is too complex.

  • Page 689: Disk Failure

    30 PS Error 22 or 25 All Printers • An unexpected PostScript firmware error has occurred. – Replace the PostScript SIMM. 30 PS Error XX (all others) All Printers • A PCL file is being sent to the printer while it is in PostScript mode, or a PostScript file or application error has occurred.

  • Page 690

    40.x MIO Error • An abnormal connection break in the specified MIO card occurred. If x=1; HP MIO port 1 (upper slot) If x=2; HP MIO port 2 (lower slot) [Select] – Press to continue, or power cycle the printer. If the error persists, replace the MIO card.

  • Page 691

    The paper size selection does not match the installed paper. • One of the cassettes is overfilled or improperly adjusted. – Remove the paper from the cassette. Readjust the cassette. • The paper does not meet HP specifications. 40 – Control panel messages...

  • Page 692

    41.4 or 5 Error All Printers • The DC controller or formatter PCA is defective. IIISi/4Si • The tab on the toner cartridge is broken. 41.x Error 5Si, 5 • If x=1: Defective connections: – Reseat J205, J206, J207, and the laser scanner connections. •...

  • Page 693

    50 Error/50 Service (fuser malfunction) All Printers • A temporary error has occurred. – Turn the printer off for 20 minutes to clear the temporary 50 Error. • The power is low or unstable (for example, in a brownout). – Locate and verify a stable power source. 6L, 5L •...

  • Page 694

    4Si, IIISi • The fuser is improperly seated. • The connector J201 is improperly connected. – Reseat the connector J201 on the sensor PCA. • The SW 101 is disengaged. – Check the SW101 to make sure it is engaged with the top cover closed.

  • Page 695: X Fuser Error

    III, II • There is a defective fuser to the DC controller cable (hot fuser or blown thermoswitch). – Replace the cable fuser to the DC controller (part number RG1-0907-000CN). • Check the fuser to the AC power module cable (cold fuser). –...

  • Page 696

    51 Error (loss of beam detect) 6L, 5L, 6P, 5P, 4P, 4L • A temporary error has occurred. – Power cycle the printer. • The laser scanner assembly is not seated. • The laser scanner assembly is defective. – Replace the laser scanner assembly (or cable on the 5L only). •...

  • Page 697

    IIIP, IIP Plus, IIP • The toner cartridge is improperly seated. • The laser shutter operation is functioning improperly. • The fiber optic cable is damaged. • The laser PCA is bad. IIID, III, IID, II • The toner cartridge is defective. •...

  • Page 698

    52 Error (incorrect scanner speed) 6L, 5L, 6P, 5P • A temporary error has occurred. – Power cycle the printer. • The scanning assembly is improperly fitted. • A problem has occurred with the scanner cable. • The laser scanner assembly is defective. •...

  • Page 699

    4 Plus, 4 • The laser scanner cable is faulty. • The laser scanner assembly is defective. IIIP, IIP Plus, IIP • The scanner motor is bad. • The DC controller is bad. IIID, III, IID, II • The laser scanner cable to the DC controller is defective. –...

  • Page 700

    53 Error (accessory memory error) 4Si, IIISi • A temporary error has occurred. – Power cycle the printer. • A laser malfunction has occurred. – See 51 Error recommendations. IIIP, IIP Plus, IIP • 53 Error Memory Unit 1 (on the top). •...

  • Page 701

    53.XY.ZZ Error 6L/5L • An error has been found in the RAM or ROM. – Power cycle the printer. • The memory card is defective or incompatible. – Turn off the printer, remove any additional memory, then turn the printer back on. If the message clears, replace the memory card. •...

  • Page 702

    11=ROM out of bounds 12=Could not make temporary mapping Note An Error 53.1y.08 generates if HP LJ 4P Plus memory is installed in an HP LJ 4. • An error has been found in the RAM (or ROM: 5L only).

  • Page 703

    54 Error • The duplexer is defective. – Replace the duplexer. IID, IIID: Duplex Feed Error • The duplex shift plate is improperly fitted. – Check the duplex shift plate for correct position and operation. • The PS5 or SL4 is bad. –...

  • Page 704

    55 Error (internal communication problem) All Printers • The cable is loose or bad. • The DC controller PCA is defective. – Replace the DC controller PCA. Note: Error 55 on a LJ Series II requires replacing both the DC controller and the Interface PCA at the same time.

  • Page 705

    2686D/A • The interface or formatter PCA is defective. 56 Error 4Si, IIISi • An attempt is being made to print envelopes while the printer is in duplex mode. IID, IIID • The output selector knob is not in duplex position. 56.x Error •...

  • Page 706

    4L, 4 • The main motor is not functioning properly. IIIP, IIP Plus, IIP (57 Error 1) • An incompatible memory card is in the top slot. • An incompatible memory card is in the bottom slot. • The motor cables or connectors are poorly seated. •...

  • Page 707

    • The AC kill switch operation is faulty. • The connector J010 is improperly fitted. • There is a bad main motor PCA or main motor. 58 Service 6P, 5P, 5, 4V, 4P, 4L, 4 • The fan cable is improperly fitted. –...

  • Page 708

    59 Add Memory 4Si, IIISi • Not enough optional memory is installed to support the PostScript option for the application being used. – Verify that the SIMMs are seated properly; replace any defective SIMMs, or install additional SIMMs. 59.x Printer Error •...

  • Page 709

    61 Service 4P, IIIP, IIID, III, IIP Plus, IIP, IID, II, 2686D/A • The formatter PCA is defective. 61 Memory 4V, 4 Si, IIISi • The SIMMs are defective. 61.x Service All Printers • The SIMM in slot x is improperly fitted. •...

  • Page 710

    62.x Service/Printer Error, 62.0 Service, 62.1–4 Service, 62.5 Service, 62.6 Service All Printers • The font cartridge or the SIMMs are improperly fitted. – Reseat the SIMMs and/or the font cartridge; power cycle the printer. • The internal memory is defective. (x=0) –...

  • Page 711: Printer Error

    64 Service/Printer Error All Printers • The formatter PCA is defective. • The DC controller PCA is defective. 65 Memory 4V, 4Si, IIISi • The SIMMs are defective. 65 Service All Printers (except 4Si, IIISi) • The formatter PCA is defective. 4V, 4Si •...

  • Page 712

    66.x.yy Device Error If the control panel displays a 66.x.yy device error message, the printer will list additional error codes in the error log. These can be printed or viewed. A device error message indicates a paper-handling error. The printer is unable to communicate with the external paper handling PCA. Verify that the C-link cables are installed correctly.

  • Page 713

    If yy=31: The printer is not supported by the paper-handling device 1. If yy=32: The printer is not supported by the paper-handling device 2. If yy=33: The printer is not supported by the paper-handling device 3. If yy=34: The printer is not supported by the paper-handling device 4. If yy=35: The printer is not supported by the paper-handling device 5.

  • Page 714

    67 Service/Printer Error • The field replacement units (FRUs) are not installed properly. – Reinstall the FRUs. LJ 5 • The formatter PCA is defective. – Reseat any accessories. If the error persists, replace the formatter PCA. • A temporary error has occurred. –...

  • Page 715

    68 Error/Service All Printers • The formatter PCA is defective. • A temporary error has occurred. ]Continue] – Press and check the control menu settings. Then, power cycle the printer. 6P, 5P • (68 SERVICE) -NVRAM full. – Perform a nonvolatile random-access memory (NVRAM) [Reset] initialization by holding down for more than 20 seconds...

  • Page 716

    4P, 4 Plus, 4 • (68 SERVICE) The NVRAM is full. – Power cycle the printer. If the problem persists, perform a [Item] NVRAM initialization by holding down while turning on the printer. All control panel settings (including service mode settings) will require resetting following this procedure.

  • Page 717

    72 Service All Printers • The formatter PCA or the font cartridge is defective. – Replace the formatter PCA. • The font cartridge was removed during formatter PCA access. – Power cycle the printer and continue. 79 Service All Printers •...

  • Page 718

    • An unrecoverable firmware error occurred. 1 Power cycle the printer. 2 Reseat or replace the interface cable; power cycle the printer. 3 Remove the SIMMs one at a time and power cycle the printer. 4 Remove the MIO card(s) one at a time and power cycle. 5 Try using the parallel interface, if possible.

  • Page 719: Blank Display

    89 PostScript ROM Failure All Printers (except 6L and 5L) • The PostScript ROMs have bent or broken pins. • Inspect the PostScript ROMs/SIMM for bent or broken pins. • The ROMs/SIMM are improperly located. – Check that the ROMs/SIMM are in the correct location and are oriented properly.

  • Page 720

    All LEDs Off (blank display) 6L, 5L • The printer is in sleep mode. – Press the front panel button or open the EP door. • No power is supplied to the printer. – Check the power cord connections and the power source. •...

  • Page 721

    This indicates a firmware error. – Note the LED pattern, bitronics error code, printer condition, data sent, and any other information that may help to isolate the error. Contact HP technical support with this information. Data LED is Blinking 6L, 5L •...

  • Page 722

    Display Is All Block Characters All Printers • The display cable is defective or disconnected. – Reseat or replace the display panel cable. • The control panel is defective. • The formatter PCA is defective. – Check and replace as needed. Error LED is On Continuously 6L, 5L •...

  • Page 723

    • The disk drive is improperly fitted. – Reseat the disk drive; ensure that the connector pins are fully seated. • The disk drive is not installed. – Run a self-test to verify the presence of the disk drive (look under Installed Options: Disk on the self-test page).

  • Page 724

    Service mode Overview This chapter provides the procedures used to access service mode and related functions. Overview – 73...

  • Page 725

    Service Mode Tasks You can perform the following tasks while in service mode. • Print a service mode self-test page. • Verify the page count. (The page count is also displayed on the standard self-test page.) • Set the page count (not available on 4L and IIP). •...

  • Page 726: Accessing Service Mode

    Accessing Service Mode Use the following procedures to access service mode. Note There is no service mode or NVRAM on LaserJet 6L, 5L, 6P, 5P, or 4L printers. The page counts are retained only while the printer is plugged in; the page count is lost when the printer is unplugged. Note Use PJL commands in the software to access service mode in LJ5P and LJ 4 ML printers.

  • Page 727

    LJ IIISi 1 Turn the printer off. Line], [Continue], and [Enter] 2 Press simultaneously while turning the printer on. 3 Press [Continue], and then press [Enter]. After a few seconds the printer should display Service Mode LJ IIIP, IIP+, IIP 1 Turn the printer off.

  • Page 728: Setting The Page Count

    Setting the Page Count (except on the LJ 6L, 6P, 5P, 4L, IIP) The page count is stored in the printer in non-volatile memory. If it is necessary to replace the formatter PCA, the page count should be reset to the original page count to reflect the age of the print engine. Use the following procedure to set the page count.

  • Page 729: Setting The Page Count And Serial Number

    Setting the Page Count and Serial Number LJ 4V 1 Enter service mode. See page 74 for instructions. [Menu] 2 When is displayed, press to access the Service Mode service menu. [Item] 3 Press to proceed through the menu. Pages=XXXXXX displayed.

  • Page 730

    Setting the Default Paper Size for a Cold Reset The initial default paper size for the formatter PCAs in Europe is A4. When replacing formatters whose default is set for A4 (European Formatters), set the customization variable to A4. When the customization variable is set to A4, the cold reset procedure cannot reset the paper size to Letter.

  • Page 731

    [Enter] 5 Press to save your selection. [On Line] 6 Press to return the display to SERVICE MODE [On Line] 7 Press a second time to exit service mode. LJ 4, 4 Plus, and 4P Only 1 Enter service mode as described in this section. [Menu] 2 Press to display...

  • Page 732: Power Supply

    Power supply Overview The following schematics will assist in checking and verifying printer systems and functions, including operating voltages, power supplies, and circuitry. Overview – 81...

  • Page 733

    LaserJet 6L, 5L The DC controller PCA coordinates all print engine activities, drives the laser, and coordinates print data from the formatter PCA with the image formation process. The DC controller includes both an AC and DC power supply and distribution circuitry. The DC controller controls the following systems and functions: Print Engine Control •...

  • Page 734

    DC Controller Figure 3-1 DC Controller Loads LaserJet 6L, 5L – 83...

  • Page 735

    LaserJet 5Si The AC and DC power supply circuits are contained in the Low Voltage Power Supply (LVPS). The high voltages required for image formation are generated by the High Voltage Power Supply (HVPS). The Low Voltage Power Supply and Distribution System are illustrated below. Figure 3-2 Low Voltage Power Supply and Distribution System 84 –...

  • Page 736

    LaserJet 5P, 4P, and 4L The DC power supply circuitry, located on the DC controller PCA, generates +5 DC and +12 DC. Uses for each are summarized below. +5 DC • Formatter PCA • Photosensors • DC controller circuitry • Laser scanner assembly +12 V DC •...

  • Page 737

    LaserJet 5, 4 Plus, 4 Figure 3-4 DC Power Supply Checks (LJ5, LJ4 & LJ4+) TB201 on DC controller Use this procedure to verify the operating voltages of the LJ5, LJ4, and LJ4+: 1 Listen for the exhaust fan. A rotating fan indicates that the +5V DC and the +24 V DC are present.

  • Page 738

    LaserJet 4V The DC power distribution circuitry, located on the DC controller PCA, distributes +5 V DC, +12 V DC, and +24 V DC, as shown. +5 V DC • Control Panel • Formatter PCA • Photosensors (PS 401, PS 402) •...

  • Page 739: Dc Controller Loads

    Power Supply Unit Circuit Breaker Switching Trans- Noise +24V CB101 Filter Rectifier Transistor former Filter Fuse Power Switch (F101) 24V to 5V (SW101) Control Photo- Front Door coupler Switch (SW102) Fusing Heater Drive Circuit Overcurrent Protection /RELE Front Door Switch /FUSE1ON (SW102) /FUSE2ON...

  • Page 740

    LaserJet 4Si, IIISi Follow this procedure to verify the voltages on the LaserJet 4Si and IIISi printers: 1 Listen for the fans. Running fans indicate that the +5 V DC and the +24 V DC are present. 2 Make sure that the 24A V DC is available on pin 1 of J203 on the sensor PCA.

  • Page 741

    LaserJet IIIP, IIP+, IIP Figure 3-6 DC Power Supply Checks (IIIP, IIP+, IIP) 1 DC power supply 2 J1 on formatter PCA SIGNAL Ground Ground COLOR Brown Brown Blue Blue 3 J212 on DC Controller Pin Number Color Supply BLUE GROUND BLUE GROUND...

  • Page 742

    LaserJet IIID, III, IID, II Figure 3-7 DC Power Supply Checks (IIID, III, IID, II) The LaserJet Service Diagnostic Tool can also be used to check voltages. Test tool III, II: Part number 33440-67905 • Checks DC voltages • Checks high-voltage bias •...

  • Page 743

    LaserJet 2868D/2686A J502 +24V (UA) +30V (UB) +24V (R) J208 Figure 3-8 DC Power Voltage Supply Checks (2686D, 2686A) 92 – Power supply...

  • Page 744

    Input/Output (I/O) Overview This section provides information on cabling and the printer interface. Overview – 93...

  • Page 745

    Bidirectional Parallel Interface (LJ 6L, 5Si, 5L, 6P, 5P, 5, 4V, 4P, 4L, 4 Plus, 4, 4Si, and IIISi) The bidirectional parallel interface (IEEE-1284 compliant) is compatible with Centronics parallel interfaces. The following items are required to take advantage of the enhanced capabilities provided by bidirectional parallel interfaces, such as bidirectional communication: •...

  • Page 746

    IEEE-1284 Compliant Parallel Cables HP helped develop the IEEE-1284 standard and is one of the first companies to introduce products that are compliant with it. HP offers the following IEEE-1284 compliant parallel cables. Part Number Length Connector Type C2950A 2 meters...

  • Page 747

    RS-232-C/RS-422-A Serial Interface Common Serial I/O Cables The following serial cabling schematics are typical of IBM (AT/XT) and compatible personal computers that use the standard (9/25) pin serial RS-232C interface. Male DB-25 cable to Female DB-25 (17255D) Printer Computer (Male connector) (Female connector) Chassis Ground Chassis Ground...

  • Page 748

    Male DB-9 cable to Female DB-9 (C2932A) Printer Computer (Male connector) (Female connector) Sig Gnd Sig Gnd HOOD HOOD SHIELD M DB-9 F DB-9 Male DB-9 cable to Female DB-25 (C2933A) Printer Computer (Male connector) (Female connector) Sig Gnd Sig Gnd Chassis Ground HOOD...

  • Page 749

    25- to 9-pin serial adaptor (P/N C2809A) The pin-outs for the adaptor are shown below: C2809A pin configuration 9-pin Male 25-pin Female not connected not connected not connected Shell Shell 98 – Input/Output (I/O)

  • Page 750

    Serial I/O Specifications Handshaking RS-232-C: Xon/Xoff (software) and Data Terminal Ready (hardware) Protocol RS-422-A: Xon/Xoff (software) only The signal logic or “sense” of the data terminal ready (DTR) line is switchable to either active HIGH (the factory default) or active LOW from the printer control panel.

  • Page 751

    Configuring the Computer Interface The following information applies to IBM personal computers (PCs) and compatible computer systems. ® Use MS-DOS EDIT or a similar program to enter the appropriate MS- DOS MODE commands in the computer's AUTOEXEC.BAT file. See the getting started guide or set-up manual for the printer for step-by- step instructions.

  • Page 752: Verifying Communication

    Verifying Communication MS-DOS Use this procedure to verify communication between an MS-DOS computer and an HP LaserJet printer: 1 Turn the computer on. 2 Turn the printer on. 3 Wait until the printer displays 00 READY DIR >PRN and press [Enter]. When you 4 At the DOS prompt, type do, the printer's Form Feed light should illuminate.

  • Page 753

    Macintosh Use this procedure to verify communication between a Macintosh computer and an HP LaserJet III printer: Note The LaserJet printer must have PostScript and AppleTalk installed and have at least 1 megabyte of additional memory. 1 Turn the computer on.

  • Page 754: Troubleshooting Ir Printing Problems

    Infrared Communications (6P, 5P, 5 Only) The 6P, 5P, and 5 printers feature an infrared (IR) port that is compliant with the Infrared Data Association (IrDA) standard. (The LaserJet 5 requires an additional transceiver pod.) A status light indicates when the port is active.

  • Page 755

    Designed for troubleshooting IR communication problems, this tool was developed by Genoa Technology, Inc., in cooperation with Hewlett- Packard. The part number is 5062-4661. Order it through HP Parts Direct Ordering (see inside back cover). To test the peripheral device: 1 Put the LaserJet printer in mode.

  • Page 756

    DTR pin 20 low when the printer is ready. the printer is ready. Refers to HP 2686A+ and HP 2686D models Refers to all models of HP 2686 printers Refers to HP 2686D models only Selecting the I/O Type – 105...

  • Page 757

    Baud Rate Switch (SW1) Switch Number Baud Rate 1200 2400 4800 9600 19200 Figure 4-1 Baud Rate Switch 106 – Input/Output (I/O)

  • Page 758: Media Specifications

    Hewlett-Packard recommends testing print media before buying it in large quantities. Note For complete paper specifications for all LaserJet printers, see the HP LaserJet Family Paper Specification Guide . Overview – 107...

  • Page 759: Paper Sizes

    Paper Sizes Metric System Size Metric Dimensions U.S. Dimensions 841 x 1189 mm 33.1 x 46.8 in 297 x 420 mm 11.7 x 16.5 in 210 x 297 mm 8.3 x 11.7 in 148 x 210 mm 5.8 x 8.3. in B4 (ISO) 250 x 353 mm 9.8 x 13.9 in...

  • Page 760

    Paper Specifications Category Specifications Acid Content 5.5 pH to 8.0 pH Basis Weight: LJ 5, 6L front output slot 60 to 163 g/m (16 to 43 lb) LJ 6P Tray 1 LJ 5P paper cassette LJ 5L,6L paper output bin 60 to 105 g/m (16 to 28 lb) LJ 5 Tray 2...

  • Page 761

    Paper Weight Equivalences (Approximate) Metric Weight U.S. Weight (lb) or Thickness (mm) (g/m Europe Japan Postcard* Bond Text Cover Bristol Index thickness Book 15** 176 * U.S. postcard measurements are approximate. Use for reference only. ** This media weight (row 15) may perform to your satisfaction but it is beyond the printer’s specifications.

  • Page 762

    Troubleshooting Paper Problems Paper problems can be difficult to detect. The following series of steps will help isolate paper-induced problems versus printer problems: • Isolate a paper path. • Isolate a brand of paper. • Isolate a type of paper. •...

  • Page 763: Papers To Avoid

    Multi-part forms • Odd-sized paper If your printer is having trouble with paper jams, multi-feeds, or misfeeds, use HP-brand paper: HP 20 lb Multi-Purpose Paper, (part number 9300-2092); HP 24 lb LaserJet Paper, (part number 9300-2091). 112 – Media specifications...

  • Page 764: General Tips, Paper Curl

    Consult the user guide for the printer and the HP LaserJet Printer Family Paper Specification Guide , for more information. General Tips – 113...

  • Page 765: Envelope Specifications, Envelope Sizes

    Envelope Specifications Category Specifications Basis Weight 75 to 90 g/m (20 to 24 lb) single layer Caliper 3.3 to 5.5. mils (0.084 to 0.14 mm) single layer thickness Curl Less than 5 mm (0.2 in) curl across entire surface Finishing Accurate, sharply creased folds with no more than two thicknesses of paper at the leading edge Fusing...

  • Page 766

    Envelopes to Avoid Do not use the following envelopes: • with clasps, snaps, or tie strings • with transparent windows, holes, perforations, or cutouts • having an open flap with adhesive exposed • having paper, inks, adhesives, or materials that discolor, melt, offset, or release hazardous emissions when exposed to 205°...

  • Page 767

    The envelopes must lay flat. • The paper grain should be diagonal to the direction of the feed. • Adhesives must meet HP specifications for fusing compatibility. • Basis weight must not exceed 90 g/m2 (24 pounds). • Do not use envelopes with clasps, snaps, tie strings, or windows.

  • Page 768: Label Specifications

    Label Specifications Category Specifications Adhesive Must not be on any external surfaces of the label before, during, or after printing. Label construction and die-cutting must not allow labels to peel off during transport, printing, or fusing Caliper Most not exceed 0.18 mm (0.007 inches) Curl In ream: flat within 13 mm (0.5 inches) Finishing...

  • Page 769

    • Contain no excessive glue. (The adhesive should be acrylic-based emulsion and should not come into direct contact with the printer.) • Meet HP specifications for fusing compatibility • Meet HP specifications for caliper • Have a carrier sheet that is not too smooth •...

  • Page 770: Transparency Specifications

    Use the straightest paper path to avoid curling and other problems. • Use transparencies with the correct resistivity. • Use transparencies that meet HP specifications for fusing compatibility. • Remove each printed sheet from the tray and place it on a flat surface before printing the next sheet.

  • Page 771

    HP Paper Training Video HP has developed a training video focusing on how paper is manufactured and how the manufacturing process relates to the use of paper in HP LaserJet printers. Part numbers are shown below. Part No. Version (VHS Format)

  • Page 772

    Toner cartridge information Overview This chapter provides information on toner cartridges and their use. HP recommends using HP toner cartridges, which are designed specifically to enhance the output from the HP LaserJet family of printers. Overview – 121...

  • Page 773

    Cartridge Weights/Page Counts Page Product Cartridge Full Empty Count LaserJet Weight Weight at 5% Coverage 6L, 5L C3906A EP-A 730 gm 630 gm 2,500 (25.7 oz.) (22 oz) C3909A EP-W 3000 gm 2200 gm 15,000 (106.7 oz) (80.5 oz) 6P, 5P C3903A EP-V 920 gm...

  • Page 774: Character Voids

    To minimize the occurrence of character voids, avoid media with a rough finish. Use media that is within the Hewlett-Packard paper specifications listed in the user guide or the HP LaserJet Family Paper Specification Guide . If the finish is too rough, the surface will consist of large inconsistencies.

  • Page 775

    (>11 Dennison) are likely to exhibit this effect more than others. Toner in the HP LaserJet printers is composed of minute particles of pigmented plastic material (styrene) and iron oxide. When the toner is subjected to the fusing temperature, these individual iron-impregnated plastic particles become part of a larger plastic image on the page.

  • Page 776

    Transfer of Toner Image After printing a document on an HP LaserJet printer, folding it, and sending it through the mail, you might observe that a portion of the print image was transferred to opposing surfaces of the folded document.

  • Page 777

    HP LaserJet printers, refer to the HP LaserJet Printer Family Paper Specification Guide . This guide can be ordered by calling HP Parts Direct at 800-227-8164 in the U.S., or HP Distribution at 970-339-7009. Because of the way that laser printing is accomplished, currently there is no way to entirely eliminate the possibility of toner transfer.

  • Page 778

    HP PLANET PARTNERS The U. S., Canada, Europe, and Australia now have HP toner cartridge recycling programs. The used toner cartridge should be placed in the wrapper and box that held the new cartridge and sent back for recycling. U.S.

  • Page 779

    1 The HP LaserJet toner cartridge is not designed to be refilled or remanufactured. 2 Hewlett-Packard has no control or process to ensure that a refilled toner cartridge will function at the high level of reliability of a new HP LaserJet toner cartridge.

  • Page 780

    The entire family of HP LaserJet printers is covered under a standard one-year warranty from the date of purchase. Hewlett-Packard offers optional maintenance contracts after the one-year warranty expires. The use of refilled toner cartridges alone does not affect either the warranty or any maintenance contract purchased from HP.

  • Page 781

    130 – Toner cartridge information...

  • Page 782: User Replaceable Parts

    The following tables list the product, product number, product description, and service part number for each printer. Parts can be ordered through HP Parts Direct Ordering at (800) 227-8164 (U.S. only). For additional product support, see the inside back cover.

  • Page 783

    J2550-69001* J2552A JetDirect Card for 10Base-T/BNC/Ltalk J2552-69001* Boards J2555 JetDirect Card for Token Ring J2555-69002* J2374C JetDirect Network Software/HP-UX J2375C JetDirect Network Software/Sun Unix J2382A/B JetDirect EX for Ethernet/10Base-T/BNC J2382-69003* J2591A JetDirect EX for Ethernet/10Base-T/BNC J2591A Envelope C3927A Envelope Feeder...

  • Page 784

    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...

  • Page 785

    Cables C2947A Parallel IEEE-1284 compliant A to C (10.0m) C2933A Serial 25-pin-F/9 pin-M C2932A Serial 9-pin-F/9 pin-M 92298A HP Toner Cartridge Toner C3903A HP Toner Cartridge C3906A HP Toner Cartridge C3909A HP Toner Cartridge 134 – Printer options and user replaceable parts...

  • Page 786

    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Printer options and user replaceable parts – 135...

  • Page 787

    Product Product Product Description Service Number Part Number 33443A** 1 MB Board (Revision A) 33443-69001* 33443B** 1 MB Board (Revision B) 33443-69004* 33444A/B** 2 MB Board 33444-69012* 33445A/B** 4 MB Board 33445-69012* 33474A** 1 MB Board (replaced by Revision B) 33474-69004* 33475A** 2 MB Board (replaced by Revision B) 33475-69011* 33474B...

  • Page 788

    IIISi IIIP IIID IIP+ • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...

  • Page 789

    C2059D** LAN Server/LAN Manager Token Ring 28637-69201* C2059E** EtherTalk MIO 28636-69301* C2059F* LocalTalk MIO J2341-69001* C2059H* MPE ESC? MIO card for the HP 3000 28644-60101 C2059T* TCP/IP Ethernet 28636-69401* J2337A** Ethernet/802.3 (BNC/RJ-45) Novell J2337-69001* J2338A** 802.3 (BNC/RJ-45) LAN Srvr/LAN Mgr J2338-69001*...

  • Page 790

    IIISi IIIP IIP+ IIID • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...

  • Page 791

    Product Product Product Description Service Number Part Number 33457A** 50 envelope power feeder 33457-69001* 33458A** 50 envelope power feeder 33458-69001* C2060A 100 envelope power feeder C2060-69001* Envelope C2082A** 75 envelope power feeder C2082-69001* Feeder C2082B 75 envelope power feeder C2082-69001* Separation Pad for IID Env.

  • Page 792

    IIISi IIIP IIID IIP+ • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...

  • Page 793

    Product Product or Product Description Part # 33472A** Optional Lower Cassette with letter tray 92275B 33472A/B** Optional Lower Cassette with A4 tray 92275D 92275B Letter-size tray (8.5 x 11 in) 92275C Legal-size tray (8.5 x 14 in) 92275D A4-size tray (210 x 297 mm) 92275E Executive-size tray (7.25 x 10.5 in) 92275F...

  • Page 794

    IIISi IIIP IIP+ IIID • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...

  • Page 795

    Phone NET or LocalTalk, Macintosh Network Cable Kit C2933A Serial 25 pin-F/9 pin-M C2932A Serial 9 pin-F/9 pin-M 92275A HP Toner Cartridge 92285A HP Toner Cartridge (2686A, 2686D) 92295A HP Toner Cartridge 92291A HP Toner Cartridge 92298A HP Toner Cartridge 92274A HP Toner Cartridge...

  • Page 796

    IIISi IIIP IIP+ IIID • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...

  • Page 797

    146 – Printer options and user replaceable parts...

  • Page 798: Service Parts

    Service parts Overview This chapter provides a list of the hardware found in HP LaserJet printers. In the following tables, the shaded areas refer to the location of the part in the printer, as shown in the corresponding illustration. The tables also provide the part or product number and a description.

  • Page 799

    6 mm 8 mm 10 mm 12 mm M 3 M 4 14 mm 16 mm 25 mm Figure 8-1 Common Hardware 148 – Service parts...

  • Page 800: Common Hardware

    Common Hardware XB1-2300-606CN M3 x 5mm Pan-head Phillips XB1-2300-507CN M3 x 5mm Pan-head Phillips XB1-2300-607CN BH3 x 6mm Pan-head Phillips 0515-1895 M3 x 8mm Pan-head Phillips XB1-2301-407CN M4 x 14mm Pan-head Phillips XB1-2400-606CN M4 x 6mm Pan-head Phillips XB1-2400-809CN M4 x 8mm Pan-head Phillips 0515-1912 M4 x 8mm...

  • Page 801

    Common Hardware continued XA9-0253-000CN M3 x 8mm Loose Flat/Lock Washer Phillips XA9-0584-000CN M3 x 12mm Loose Flat/Lock Washer Phillips FA9-1449-000CN Star-washer trus-head Phillips XB1-2302-507CN M3 x 25mm Trus-head Phillips XB6-7300-809CN M3 x 8mm Trus-head Phillips XA9-0326-000CN M3 x 4mm Trus-head Phillips XB6-7300-807CN M3 x 8mm Trus-head Phillips...

  • Page 802

    J 6L, 5L Parts Figure 8-2 LJ 6L, 5L Parts Common Hardware – 151...

  • Page 803

    LJ 6L, 5L Parts (See figure 8-2) RB1-7177-000CN Paper Feed Frame RG5-1940-000CN 5L Pick-up Roller Assembly RG5-3486-000CN 6L C3941-69001 5L DC Controller PCA, exchange (110V) RG5-3506-000CN 6L C3941-69002 5L DC Controller PCA, exchange (220V) RG5-3509-000CN 6L RF5-1534-000CN Transfer Roller RF5-1530-000CN 5L Transfer Roller Guide RF5-2358-000CN 6L RG5-1942-000CN 5L...

  • Page 804

    LJ 6L, 5L Parts (continued) (See figure 8-2) RF5-1516-000CN 5L Pressure Roller RF5-2362-000CN 6L RG5-2000-000CN 5L Laser Scanner (new) RG5-3494-000CN 6L C3941-69003 5L Laser Scanner (exchange) RY7-5005-000CN Gear Kit #1 RY7-5006-000CN 5L Gear Kit #2 RY7-5036-000CN 6L RY7-5007-000CN Fuser Release Kit RY7-5008-000CN Separation Pad Kit RY7-5009-000CN...

  • Page 805

    LJ 5Si Mopier Paper Handling Figure 8-3 LJ 5Si Mopier Paper Handling Components 154 – Service parts...

  • Page 806

    LJ 5Si Mopier Paper Handling Components C3763A 2000 Sheet Input Unit Assembly (exchange) C3763-69501 RG5-2155-000CN Tray 4 Assembly C3764-69100 Multi-Bin Mailbox (exchange) C3766-69515 Mailbox with Stapler (exchange) RB1-6822-000CN Duplex Unit Roller 1 C3762-60501 Duplex Unit C3766-69500 Stapling Unit (exchange) RB1-6491-000CN Face Up Bin C3764-60504 External Paper Handling PCA...

  • Page 807

    LJ 5Si Parts Figure 8-4 LJ 5Si Parts 156 – Service parts...

  • Page 808

    LJ 5Si Parts RF5-1412-000CN Transfer Roller RH7-1260-000CN Main Motor RG5-1874-000CN Face-Down Delivery Assembly C3166-69012 Fusing Assembly 100-120V, exchange C3166-69013 Fusing Assembly 220-240V, exchange RG5-1834-000CN Feeder Assembly RG5-1833-000CN Registration Assembly RG5-1880-100CN Tray 1 Pick Up Assembly RB1-6730-000CN Tray 1 Feed Roller RF5-1455-000CN Tray 1 Separation Pad C3166-69011...

  • Page 809

    LJ 5Si Parts Figure 8-5 LJ 5 Si Parts 158 – Service parts...

  • Page 810

    LJ5 Si Parts C3166-69006 Laser Scanner Assembly, exchange RH7-1266-000CN Fan 1 RG5-1846-000CN Switch/Sensor PCA C3166-69005 High Voltage Power Supply, exchange C3166-69010 DC Controller PCA, exchange RG5-2433-000CN Front Panel (Control Panel Display) not shown LJ 5Si Parts – 159...

  • Page 811

    LJ 5Si Parts Figure 8-6 LJ 5Si Parts 160 – Service parts...

  • Page 812

    LJ 5Si Parts C3166-69007 Low Voltage Power Supply, 110-120, exchange C3166-69008 Low Voltage Power Supply, Universal, exchange C3168-69005 Formatter, exchange RH7-1271-000CN Fan 3 RH7-1266-000CN Fan 2 5 & 6 RG5-1845-000CN Paper-Size Sensing PCA, Trays 2 and 3 LJ 5Si Parts – 161...

  • Page 813

    LJ 6P, 5P Parts Figure 8-7 LJ 6P, 5P Parts 162 – Service parts...

  • Page 814

    Figure 8-8 LJ 6P, 5P Parts (continued) LJ 6P, 5P Parts – 163...

  • Page 815

    LJ 6P, 5P Parts (See figures 8-7 and 8-8) RG5-1799-000CN 5P Motor Assembly RG5-2786-000CN 6P Motor Assembly RF5-1290-000CN 5P Transfer Roller Assembly RF5-0596-000CN 6P Transfer Roller Assembly RG5-1786-000CN Mirror Assembly C3150-69005* 5P C3980- Laser Scanner Assembly (exchange) 69005* 6P Laser Scanner Assembly (exchange) R75-4000-000CN 5P R98- Complete Tray 2 Assembly 1001-000CN 6P...

  • Page 816

    LJ 6P, 5P Parts (continued) (See figures 8-7 and 8-8) RB1-2205-000CN Tray 1 Roller C3151-69001* 5P Formatter PCA (exchange) C3981-69001* 6P Formatter PCA (exchange) 1252-5460 Formatter to Controller PCA Connector RG5-1719-000Cn High-voltage Connector Assembly RH7-1258-000CN 5P Tray 1 Solenoid (SL2) RH7-5160-000C Tray 1 Solenoid (SL2) C3150-69001* 5P...

  • Page 817

    LJ 5 Parts Figure 8-9 LJ5 Parts 166 – Service parts...

  • Page 818

    LJ 5 Parts RG5-0475-060CN Paper Output Sensor Assembly RG5-2189-000CN Paper Output Assembly C2037-69004* DC Controller PCA C2037-69008* Laser Scanner Assembly C3919-69001* Formatter PCA RB1-2205-000CN Tray 1 Pickup Roller RB1-7911-000CN Tray 2 Pickup Roller RB1-7983-000CN Tray 3 Pickup Roller RB1-2133-000CN Paper Out Sensor Flag RF5-0343-000CN Tray 1 Separation Pad RF5-0349-000CN...

  • Page 819

    LJ 5 Parts, continued Figure 8-10 LJ5 Parts 168 – Service parts...

  • Page 820

    LJ5 Parts (See figure 8-10) C2037-69001* 110V Fusing Assembly C2037-69002* 240V Fusing Assembly RH7-1301-000CN Main Motor C2037-69006* 110V Power Supply C2037-69007* 240V Power Supply C3916-69005* Paper Feed Assembly RG5-2238-000CN Display Assembly (without overlay) RG5-0469-020CN Transfer Guide Assembly RG5-0512-070CN Paper Control PCA RG5-0514-000CN Sensor PCA C2037-69009*...

  • Page 821

    LJ 5 Duplexer Parts Figure 8-11 LJ5 Duplexer (cross-section) 170 – Service parts...

  • Page 822

    LJ5 Duplexer Parts RH7-1235-000CN Switchback Fan RF1-3813-000CN Switchback Stepper Motor (M2) RG1-3529-000CN Switchback Sensor Cable RF1-3808-000CN Switchback Solenoid (SL1) RF1-3814-000CN Rear Holding Tray Motor (M3) RG1-3503-000CN Power Supply Assembly RG1-3582-000CN Duplex Control PCA RA2-2072-000CN Timing Belt RA2-2076-000CN Sensor Arm WG8-5210-000CN Photosensor (PS2) RG1-3530-000CN Paper Pickup Cable...

  • Page 823

    LJ 4V, 4MV Parts Figure 8-12 LJ 4V/4MV Major Assemblies 172 – Service parts...

  • Page 824

    LJ 4V/4MV Parts C3143-69001* Exchange Formatter PCA RG5-0198-000CN Face Down Delivery Assembly RG5-1545-000CN Guide, Delivery Unit RG5-1398-000CN Main Drive Assembly C3141-69003* DC Controller PCA Assembly RG5-2044-000CN HV Power Supply Assembly RG5-1552-000CN Fuser C3141-69002* Fusing Assembly 100/115V C3141-69001* Fusing Assembly 220/240V RG5-1391-000CN Pickup Roller Assembly (not shown) RF5-0302-000CN...

  • Page 825

    RG5-1442-000CN Cable, Beam Detect RG5-1446-000CN Option Cable Assembly, 500 Sheet LC RB5-1447-000CN Clutch Cable RH-6-0098-000CN Plastic Bezel (does not include digital display) RG-5-0239-000CN DC Cable Assembly RG5-1485-000CN Display Panel Cable Assembly LJ 4P, 4L Parts Figure 8-13 LJ 4P, 4L Parts 174 –...

  • Page 826

    Figure 8-14 LJ 4P, 4L Parts (continued) LJ 4P, 4L Parts – 175...

  • Page 827

    LJ 4P, 4L Parts (See figures 8-13 and 8-14) RG5-0765-000CN Motor Main Assembly RF5-0596-000CN Transfer Roller Assembly RG5-0667-000CN 4L Beam-to-Drum Mirror RG5-0802-000CN 4P Beam-to-Drum Mirror C2003-69005* 4L Laser/Scanner Assembly C2005-69005* 4P Laser/Scanner Assembly R75-0010-000CN 4L Universal Paper Cassette R75-2010-000CN 4P Universal Paper Cassette 92274A Toner Cartridge...

  • Page 828

    LJ 4 Plus, 4 Parts Figure 8-15 LJ4+, 4 Parts LJ 4+, 4 Parts RG5-0475-060CN Paper Output Sensor Assembly RG5-0456-000CN 4 Paper Output Assembly RG5-0886-070CN 4+ Paper Output Assembly C2001-69002* 4 DC Controller PCA C2037-69004* 4+ DC Controller PCA C2001-69006* 4 Laser/Scanner Assembly C2037-69008* 4+ Laser/Scanner Assembly...

  • Page 829

    RBI-2126-000CN 4 PC Pickup Roller RBI-3477-000CN 4+ PC Pickup Roller RBI-2632-000CN 4 LC Pickup Roller RBI-2650-000CN 4+ LC Pickup Roller RB1-2133-000CN Paper Out Sensor Flag RF5-0343-000CN MP Tray Separation Pad RF5-0349-000CN Transfer Roller *Rebuilt part, requires exchange 178 – Service parts...

  • Page 830

    LJ 4 Plus, 4 Parts Figure 8-16 LJ 4+, 4 Parts LJ 4 Plus, 4 Parts – 179...

  • Page 831

    LJ 4+, 4 Parts (see Figure 8-16) C2001-69003* 4 110V Fusing Assembly C2001-69004* 4 240V Fusing Assembly C2037-69001* 4+ 110V Fusing Assembly C2037-69002* 4+ 240V Fusing Assembly RH7-1151-000CN 4 Main Motor RH7-1301-000CN 4+ Main Motor C2001-69007* 4 110V Power Supply C2001-69008* 4 240V Power Supply C2037-69006* 4+...

  • Page 832

    LJ 4Plus Duplexer Parts Figure 8-17 LJ 4Plus Duplexer (cross-section) RH7-1235-000CN Switchback Fan RF1-3801-000CN Switchback Stepper Motor (M2) RG1-3529-000CN Switchback Sensor Cable RF1-3808-000CN Switchback Solenoid (SL1) RF1-3804-000CN Rear Holding Tray Motor (M3) RG1-3503-000CN Power Supply Assembly RG1-3501-000CN Duplex Control PCA RA2-2072-000CN Timing Belt RA2-2076-000CN...

  • Page 833

    LJ 4Si, IIISi Parts Figure 8-18 LJ 4Si, IIISi Parts 182 – Service parts...

  • Page 834

    LJ 4Si, IIISi Parts RG5-0076-200CN IIISi HV Power Supply C2009-69004* 4Si HV Power Supply C2009-69008* Job Offset Assembly RG5-0088-000CN IIISi Control Panel Assembly RG5-0162-000CN 4Si Control Panel Assembly RG5-0067-180CN Delivery Cover Assembly RG5-0094-000CN Sensor PCA RG5-0095-120CN IIISi 115V AC Power Supply RG5-0096-000CN IIISi 240V AC Power Supply RG5-0166-060CN 4Si...

  • Page 835

    Figure 8-19 LJ 4Si, IIISi Parts LJ 4Si, IIISi Parts RG5-0038-000CN Left Main Block Assembly 33491-69012* 115V Fusing Assembly 33491-69013* 240V Fusing Assembly RG5-0039-070CN Right Main Block Assembly RG5-0161-090CN Registration Assembly C2009-69007* Paper Input Assembly RG5-0056-000CN Paper Refeed Assembly RG5-0040-060CN Main Motor Drive Assembly RG5-0042-000CN Main Motor PCA...

  • Page 836

    Figure 8-20 LJ 4Si, IIISi Sensor Locations LJ 4Si, IIISi Sensor Locations Face-Down Output Sensor PS151 Fusing Assembly Exit Sensor Registration Assembly Sensor Paper Refeed Sensor Duplex Assembly Sensor Switchback Assembly Sensor LJ 4Si, IIISi Parts – 185...

  • Page 837

    LJ IIIP, IIP+, IIP Parts Figure 8-21 LJ IIIP, IIP+, IIP Parts LJ IIIP, IIP+, IIP Parts 33471-67905 IIP Interface Assembly Dual I/O 33486-67901 IIIP Interface Assembly Dual I/O C2092-67901 IIP+ Interface Assembly Single I/O (Parallel only) RG1-1771-000CN Scanner Motor Assembly RG1-1769-020CN Laser PCA RG9-0696-000CN...

  • Page 838

    Figure 8-22 LJ IIIP, IIP+, IIP Parts LJ IIIP, IIP+, IIP Parts RG1-1604-000CN Density PCA 33471-69018* 115V Fuser Assembly 33471-69019* 240V Fuser Assembly RA1-7627-000CN Transfer Roller RG1-1792-000CN MP Pickup Roller Assembly RG1-1912-080CN Separation Pad RF1-2394-000CN Input Feed Roller RH7-1121-000CN Fan Cooling RH6-0010-000CN Control Panel Assembly RG1-1777-000CN...

  • Page 839

    Figure 8-23 LJIIP, IIP+, IIP Sensor Locations LJIIP, IIP+, IIIP Sensor Locations WG8-0291-000CN PS3 Photosensor (Senses paper in fuser) WG8-0323-000CN PS4 Photosensor (Senses door open) WG8-0291-000CN PS1 Photosensor (Senses paper at input feed rollers) WG8-0323-000CN PS2 Photosensor (Senses paper in MP tray) WG8-0291-000CN PS5 Photosensor (Senses door open and toner cartridge...

  • Page 840

    LJ IIID, III, IID, II Parts Figure 8-24 LJ IIID, III, IID, II Parts LJ IIID, III, II Parts RG9-0205-000CN II 115V AC Power Module RG9-0206-000CN II 240V AC Power Module 33459-69001* IID, III, IIID 115V AC Power Module RG9-0750-000CN IID, III, IIID 240V AC Power Module RH7-1122-000CN Fan Upper Cooling...

  • Page 841

    Figure 8-25 LJ IIID, III, II Parts 190 – Service parts...

  • Page 842

    LJ IIID, III, II Parts SW205 Switch Activation Lever This switch lever may need to be removed when the DC Controller PCA is replaced. RH7-1056-000CN Fan, Lower Cooling Information Only Many failures attributed to DC Controller PCAs are actually cable/connector problems. Always reseat cables before replacing PCA.

  • Page 843

    LJ IIID, IID Parts Figure 8-26 LJ IIID, IID Parts 192 – Service parts...

  • Page 844

    LJ IIID, IID Parts RG1-1350-000CN IID Switchback Assembly RG1-1992-000CN IIID Switchback Assembly RG1-1349-000CN Switchback Drive Control Assembly RG1-1347-000CN Lower Feed Drive Motor Assembly RG1-1370-000CN IID Laser Scanner Cable RG1-2067-000CN IIID Laser Scanner Cable RG1-2500-000CN Lower Pickup Roller Assembly RG1-1345-060CN Duplex Drive Roller Assembly RG1-2498-000CN Lower Duplex Guide Assembly RG1-1344-000CN...

  • Page 845

    LJ 2686D, 2686A Parts Figure 8-27 LJ 2686D, 2868A Parts LJ 2686D, 2868A Parts 02686-69011* 115V Fusing Assembly 02686-69111* 220V Fusing Assembly 02686-69008* 2686A DC Controller PCA RG1-0560-000CN 2686D DC Controller PCA RG1-0468-060CN 115V DC Power Supply RG1-0624-000CN 240V DC Power Supply 02686-69010* Scanning Unit RG0-0009-000CN...

  • Page 846

    Figure 8-28 LJ 2686D, 2686A Parts LJ 2686D, 2686A Parts RG9-0102-000CN Main Motor Assembly RG1-0649-000CN High Voltage Power Supply RG1-0209-030CN AC Controller PCA (115V) RG1-0210-040CN AC Controller PCA (240V) RG1-0204-080CN AC Driver Assembly (115V) RG1-0208-030CN Fuser Safety PCA FG1-2354-000CN Manual Feed Assembly LJ 2686D, 2686A Parts –...

  • Page 847

    Figure 8-29 LJ 2686D, 2686A Parts LJ2686D, 2686A Parts RG1-1039-000CN Feed Guide Assembly RG1-0191-020CN Transfer Corona Assembly RG1-0195-000CN Transfer Guide Assembly RG1-0215-000CN Registration Shutter Assembly RG1-0328-020CN Separation Belt FF1-3872-000CN Fuse, Resistor 47Ω 1/4 Watt RA1-0666-000CN 2686A Pick-Up Roller (3 required) RA1-2621-000CN 2686D Pick-Up Roller (6 required) Pick-Up Roller small (2 required)

  • Page 848: The Troubleshooting Process

    Summary of service notes and technical tips Overview This chapter addresses some of the more common service issues. The Troubleshooting Process The troubleshooting process, illustrated in figures 9-1 and 9-2, is a systematic approach to resolving printer problems. In searching for the causes for printer malfunctions and errors, the troubleshooting process addresses major problems first and then identifies secondary problems.

  • Page 849

    PCL becomes and errors, Configuration functional, go go to Step 3. page. to Step 2. After verifying configuration pages, go to Step 4. Figure 9-1 Troubleshooting process for HP LaserJet printers 198 – Summary of service notes and technical tips...

  • Page 850

    After meeting the error log, completion of print quality from the requirements, go to Step 6. the print job, customer host go to Step 7. go to Step 5. system. Figure 9-2 Troubleshooting process for HP LaserJet printers Overview – 199...

  • Page 851

    Service Topic Index Obtain service notes from HPNN or HP FIRST. See the chapter on services and support for additional information. The tables that follow provide illustrations of printer models, a description of common problems, and pertinent reference information. Printer Model...

  • Page 852

    Improved MP tray C3166A-16 C3167A-16 Vendor revision “B” causes C3166A-17 79 service errors C3167A-17 Entire Image Manager C3166A-18 software C3167A-18 LaserJet 5 LJ 5 Introduction: service C3916A-01 note is available through HP FIRST and other sources Service Topic Index – 201...

  • Page 853

    Printer Model Problem Description Service Note Technical Tip (number) (page number) LaserJet 4V, Paper jams with three-hole C3141A-01 punched paper Printer hangs and displays C3141A-02 “79 (0523) Service Error” Printer will not access C3141A-03 service model PostScript SIMM C3141A-04 replacement part Repeating 94MM print defect C3141A-05 57 Service Error (not caused C3141A-06...

  • Page 854

    Printer Model Problem Description Service Note Technical Tip (number) (page number) LaserJet 4P/ Clearing paper jams in LJ 4L C2003A-01 4MP and and 4P 4L/4ML Fusing assembly gear C2003A-02 lubricant LaserJet 4P product C2005A-01 introduction LaserJet 4P “50 Service C2005A-02 Error”...

  • Page 855

    Printer Model Problem Description Service Note Technical Tip (number) (page number) LaserJet Paper jams in optional 500 C2001A-01 4 Plus/4M Plus lower cassette and 4/4M Paper jam errors 13 and C2001A-02 41.3 (multi-feed jams) Accordion jams in output C2001A-03 assembly 500-sheet lower cassette C2001A-04 (Tray 3) shim improves...

  • Page 856

    Printer Model Problem Description Service Note Technical Tip (number) (page number) LaserJet Moaning sound in IIIP, IIP Plus, separation pad Compressed print Continuous “PS Busy” Incompatibility: new fusing 33471A/AB-04 assembly component 33481A/AB-04 C2007A-02 LaserJet Potential safety issue 33440A/AB/AU12 33447A/AB/AU09 Series III, II following fuser repair 33449A/AB-05 33459A/AB-03...

  • Page 857

    6L, 5L Replacement Formatter and Date Code Service Note Number: Situation: The HP LaserJet 5L printer contains three formatter PCAs and three firmware versions. Solution: The replacement formatter for all versions of the formatter and firmware is the C3942-69002 formatter with a firmware date code 19950623.

  • Page 858

    Accordion Jams in the Printer Fuser Service Note Number: C3941A-01 Serial Numbers Affected: <JPBB022333, <JPTB000101, <JPBJ051310, <JPBK006151, <JPBL033831, <JPTJ000101, <JPTK000101, <JPTL000101, <USBB158323, <JPTM080500, <JPBM007279, <JPBM007279, <JPBT000101, <JPBV000101, <JPTT090666, <JPTV122612, <JPTX029034 Description: Under some conditions, paper can be pushed back down into the fuser. This results in a jam in the fuser area. The jam can be so severe that customers cannot remove the paper and the printer requires servicing.

  • Page 859

    Countermeasure for Clearing Jams in the Printer Fuser Service Note Number: C3941A-02 Serial Numbers Affected: JPBK000000 - JPBK016388 JPBL000000 - JPBL055374, JPCW000000 - JPCW043448 JPVW000000 - JPVW081157, USCB000000 - USCB302011 JPBV000000 - JPBV010501, JPVV000000 - JPVV216255 CNVM000000 - CNVM175233, CNVN000000 - CNVN0189964 Description: When a paper jam occurs in the LaserJet 5L, it commonly occurs in the fuser area, with the paper folding accordion-...

  • Page 860

    Solution: HP has implemented an uncoated transfer roller and increased the current to the transfer roller via the DC controller printed circuit board (PCB). These solutions appear to have resolved this print- smear defect.

  • Page 861

    This intensification of sound may be annoying. Solution: HP has set up a noise kit (5182-5899). It includes a piece of foam tape and detailed instructions with drawings for correct placement of the foam tape to eliminate noise between the fan and the formatter shield.

  • Page 862

    Paper Jams When Feeding from the 2,000-Sheet Input Unit Service Note Number: C3166A-03 & C3167A-03 Associated Part Numbers: RG5-1915-040CN Serial Number Range: • 115V USBC000941-USBC002659, USCC000047-USCC000482 USCC001711-USCC002017 • 220v USQC001445-USQC001748, USRC001226-USRC003279 NLQC001445-NLQC001748, NLRC001226-NLRC003279 SGQC001445-SGQC001748, SGRC001226-SGRC003279 • 110V SGBC000941-SGBC002659, SGCC000047-SGCC000482 SGCC001711-SGCC002017 Description: After approximately 50,000 sheets have been printed from the 2,000-sheet input unit, there is a possibility of increased paper...

  • Page 863

    13.X Paper Jam Errors May Be Caused by Bad Clutch Connector Service Note Number: C3166A-04 & C3167A-04 Associated Part Numbers: RH7-5120-000CN; PIU Clutch, RH7-5119-000CN; Registration Clutch, Tray 1 Pickup Assembly; RG5-1880-090CN Serial Number Range: • 115V USBC000000-USBC008623,USCC000000-USCC007432 SGBC000000-SGBC008623,SGCC000000-SGCC007432 • 220V USQC000000-USQC008887,USRC000000-USRC003729 NLQC000000-NLQC008887,NLRC000000-NLRC003729 SGQC000000-SGQC008887,SGRC000000-SGRC003729...

  • Page 864

    Solution: HP has worked with the engine vendor to quickly sort out suspect clutches and ensure that only good parts are available as replacements. However, some printers in the serial number ranges listed earlier may have clutches that fail. Identify the jam condition as it relates to one of the assemblies above, and then replace the appropriate clutch or assembly.

  • Page 865

    Solution: HP has completed testing and recently made available a revised formatter assembly. This new 8.5 version firmware will restore the above 79 Service Error and the sub-codes listed. This new firmware will not correct any MIO resets or NVRAM resets that cause the page count, serial number, firmware number, or default paper size to reset.

  • Page 866

    YES (Configure) and then a PCL configuration page is selected to print. 14 The string ISO A3 paper size was changed to A3. 15 A floating point problem where HP was not properly initializing the floating point registers. 16 79 SERVICE (40e0) that occurred after a 20 MEMORY OVERFLOW.

  • Page 867

    Revised DC Controller Improves Fusing from Trays 2 and 3 Service Note Number: C3166A-06A & C3167A-06A Serial Number Range: • 110V XXCB00000 - XXCB019885 XXCB019886 - XXCG999999 XXCC00000 - XXCC019885 XXCC019886 - XXCG999999 XXCD00000 - XXCD019885 XXCD019886 - XXCG999999 XXBB00000 - XXBB013886 XXBB013887 - XXBG999999 XXBC00000 - XXBC013886 XXBC013887 - XXBG999999 XXBD00000 - XXBD013886 XXBD013887 - XXBG999999 •...

  • Page 868

    Solution: To improve fusing ability on all supported paper sizes, the fusing temperature has been increased from 180 degrees Celsius to 190 degrees Celsius for trays 2 and 3. The solution is provided through updated firmware on the DC Controller PCB. Action: Confirm the printer is within the serial number range listed, and then replace the DC controller PCB.

  • Page 869

    Solution: HP has completed testing and (as of July 1, 1996) made available a revised formatter assembly to the service channel. This new 8.6 version firmware resolves the problem of MIO and NVRAM resets.

  • Page 870

    C3166-69010 (Exchange), RG5-1844-050CN (New) Situation: HP has been investigating an increase in calls regarding toner dumping inside of the printer. The investigation revealed three potential scenarios in which toner dumps. It is imperative that the support partners thoroughly troubleshoot this condition in order to successfully complete the repair.

  • Page 871

    Scenario Number 3: (Least likely scenario) The printer may be exhibiting a 79 Service (04CC) error. The 79 Service (04CC) was added to the firmware code of formatters (9.1 version or greater) to capture the signal combination that resulted in toner dumping. Verify that the DC controller is not a 1.11 version, as in scenario number 2.

  • Page 872

    Affected Part Number: RG5-1880-090 Part Required: MP tray Situation: The current MP tray experienced a higher than acceptable level of failures from the tray failing to lift. This can be an intermittent failure. The failure occurs when the actuating solenoid fails to engage the tray-lifting mechanism.

  • Page 873

    Solution: HP has completed testing and, as of November 1, 1996, has made available a 9.1 version of the formatter assembly. The following fixes are included in the new version of the firmware: •...

  • Page 874

    • FORM LENGTH SELECTION FROM THE FRONT PANEL. This function can be found in the PCL MENU structure of the control panel. • SLOW PRINTING OF FORMS. Versions 7.9, 8.5, and 8.6 firmware had a problem handling raster graphics in 300 dot-per-inch (dpi) mode.

  • Page 875

    Situation: The LaserJet 5Si printer was introduced without the capacity of being able to set a default front panel font. HP soon realized the importance of this capability to many customers, particularly those in a UNIX environment who rely on setting a default font at the front panel of the printer.

  • Page 876

    Action: Replace the formatter assembly according the instructions provided in the removal and replacement section of the service manual, part number C4077-99014. BE SURE TO RE-ENTER THE SERIAL NUMBER, PAGE COUNT, AND MAINTENANCE COUNT VIA THE SERVICE MODE. This information is required so the printer will report the “PERFORM USER MAINTENANCE”...

  • Page 877

    3 Open the HCI paper tray. 4 Loosen both screws that support the paper tray locking bracket on the right side of the HCI. 5 Locate the bracket hole and pin at the middle (right side). 6 Slide the bracket so the locating pin is positioned at the middle of the bracket hole.

  • Page 878

    Microswitch Assembly in the 2,000-Sheet Input Tray Service Note Number: C3166A-13, C3167A-13 Serial Number Range: LCF00000 to LCF99999 Affected Part Number: C3168-69003 Part Required: RG5-2546-000CN Situation: A microswitch, located at the center top of the HCI tray, has been implemented to protect the tray’s functionality. When depressed, this microswitch displays “TRAY 4 EMPTY”, causing the tray to not lift at all.

  • Page 879

    Paper Tray Service Note Number: C3166A-14 & C3167A-14 Situation: HP recently made available the LaserJet 5Si with an executive-size paper tray. The 5Si Executive printer is product number C3166A, option #ABAUEA. The product option is specifically for the Marriott Corporation.

  • Page 880

    Prior to the new executive tray, Tray 1 was the only source for printing this size of media. The executive tray replaces the standard Tray 2. All other sizes must feed from either Tray 1 or Tray 3. Support Information: The Executive printer is identified with an “X”...

  • Page 881

    Confirm that the print quality problems are caused by the fusing unit and are not attributable to other components such as the toner cartridge or the use of media that does not meet HP specifications. The build-up on the fuser can be visually inspected by examining the surface of the rollers.

  • Page 882

    Improved Multipurpose Tray Service Note Number: C3166A-16A & C3167A-15A Serial Number Range: • 110V XXBY000000 - XXBY142588 XXJY000000 - XXJY 142588 XXDY000000 - XXDY097990 XXLY000000 - XXLY097990 XXCY000000 - XXCY099999 • 220V XXZY000000 - XXQY028190 XXSY000000 - XXSY070281 XXRY000000 - XXRY099999 Where XX = US, NL, or SG Y = B, C, D, F, G, H, J, K, X Affected Part Numbers:...

  • Page 883

    The majority of the time, the printer posts a 13.2 paper jam error, which can be cleared by opening and closing the printer door. Sometimes the printer reports a 58.3 error message, which requires the printer to be power-cycled. However, if the printer has a formatter with version 8.6 or older firmware, the 58.3 error message disappears within 5 seconds.

  • Page 884

    16-Megabyte SIMM Manufactured by HP: Vendor Revision “B” Causes 79 Service Errors Service Note Number: C3166A-17 & C3167A-17 Serial Number Range: • 110V: XXYC00000 - XXYJ99999 • 220V: XXYC00000 - XXYJ99999 Where XX = US, NL, or SG Y=B,C,D for 110V, or Q,R, or S for 220V...

  • Page 885

    Action: • Verify that the printer has a 16 MB SIMM marked with HM5117400BS6. • Do not replace the formatter. • Remove the 16 MB SIMM and verify that the printer no longer fails. • Replace the failing SIMM with a non-revision “B” SIMM and return the failing SIMM.

  • Page 886

    Clarity of support and firmware compatibility for this solution is important. If the customer is having problems with the solution, please instruct them to call the HP reseller that sold them their solution. If the reseller is distributing the Image Manager software, they also have the responsibility for first-level support for the software.

  • Page 887

    September 1, 1997 that do not have the required firmware to be compatible with the Entire Image Manager software. In Europe, the solution will be rolled out as a co-labeled HP and Entire product. In North America, the solution will be a third-party program.

  • Page 888

    LJ 4V/4MV Paper Jams When Using Three-Hole Punched Paper Service Note Number: C3141A-01 & C3142A-01 Serial Numbers Affected: • 110V: JPBF000000-JPBF002856, JPBC000000-JPBC003385, JPBH000000-JPBH001216 • 220-240V: JPBQ000000-JPBQ014821, JPBR000000- JPBR008695, JPBS000000-JPBS003616 Associated Part Numbers: DC controller PCB (P/N RG5-1932- 000CN) Situation: Printers in the serial number ranges listed above have a DC controller that may not allow enough time for three-hole paper to pass by the first paper sensor (PS501).

  • Page 889

    Printer Hangs or Displays 79 (0523) Service Error Service Note Number: C3141A-02 Situation: When using a PostScript level 1 driver, the printer will either hang or exhibit a 79 SERVICE (0523) error when the following condition is present: Page size A has been selected, with the printer containing Page size B, according to the following table: B (Tray) A (Driver)

  • Page 890

    Solution/Action: Any toner cartridge that exhibits this defect should be returned to HP or an HP Authorized Service Center for replacement. Cartridges beginning with lot code 4I28S* will not have the potential to become damaged. Technical Tips – 239...

  • Page 891

    57 Service Error (not caused by the main motor) Service Note Number: C3141A-06 Associated Part Numbers: RS5-2125-000CN - Spring Description: A 57.1 SERVICE error, which normally indicates a main motor failure, may also be caused by a broken spring in the sensor flag associated with the Front Door Open Sensor (PS402).

  • Page 892

    55 Service Error Troubleshooting Hint Service Note Number: C3141A-08 & C3142A-08 Situation: A “55 Service Error” is usually caused by a communication error between the DC controller and the formatter PCA. If the formatter PCA is not seated properly to the interface PCA, this error will occur.

  • Page 893

    Preventing Damage to Toner Cartridge Shutter Arm Service Note Number: NONE Associated Part Numbers: NONE Description: If the front door of the printer is not fully opened when a toner cartridge is being removed, it is very likely that the shutter that covers the cartridge drum will be broken, destroying the cartridge and resulting in blank pages being printed.

  • Page 894

    Solution: A new clutch is now being used on the paper guide plate assembly (RG5-1584-000CN). The old clutch used an oil-impregnated metal bushing as a lubricant. On some clutches, this oil would leak from the bushing, causing the armature to stick. Then, the clutch would not disengage.

  • Page 895

    Solution: Material has been removed along the length of the fuser entrance guide, and the ribs were extended. This change prevents the toner accumulation on the entrance guide from hitting the paper. Refer to the LaserJet 4V and 4MV Service Manual, Second Edition (C3141- 90929), section 8, figure 8-4, item 28 for the part.

  • Page 896

    Associated Part Number: Fan: RH7-1317-000CN or video controller assembly: RG5-1560-060CN Situation: The majority of formatter fan replacements have been for noise. These replacements have been categorized into two failure modes: • The fan/card cage assembly produces a strong pitch or tone due to the fan rotational speed that causes the formatter cage to resonate.

  • Page 897

    Paper Jams In Output Area When Using Large Media Service Note Number: C3142A-15 Affected Serial Numbers: All Units Associated Part Number: RG5-0198-000CN Situation: After 400k images are printed, toner can build up on the face-down delivery assembly rollers. This can cause paper jams in the fuser or output area and/or leave claw marks on large-sized media (B size or 11X17 media).

  • Page 898

    Solution: 1 The tooling mold for the J11 clip was modified to ensure that the manufactured part is free of burrs. 2 The manufacturing process of the rollers has been modified with a new ultrasonic cleaning procedure to eliminate any blooming effects. The new preconditioned rollers have been tested extensively, with good results and performance.

  • Page 899: Paper Jams

    LJ 4P/4MP LJ 4L/4ML Paper Jams Service Note Number: C2003A-01 (Information only) Description: A majority of the problems on the LaserJet 4L and 4P center around paper jams and removal of paper jams. In their haste to remove paper jams, people often damage the paper-input sensor flag (RF5-0601-000CN).

  • Page 900

    Media Jams Caused by Broken or Binding Input Paper Sensor Arm Service Note Number: C2003A-03, C2015A-03, C2005A-07, C2040A-07, C3134A-01 Serial Numbers Affected: AAAA000000 - ZZZZ999999 Description: Improperly removing jammed media can damage or break the Input Paper Sensor Arm (RF5-0601-000CN). As a result, media will jam frequently or constantly, regardless of whether media is fed from the lower cassette or from the manual feed slot.

  • Page 901

    Broken Printer Frame - Paper Cassette Support Guides Service Note Number: C2003A-04, C2015A-04, C2005A-08, C2040A-08, C3150A-02, C3155A-02, C3134A-02, C3932A-02, C3935A-02 Serial Numbers Affected: AAAA000000 - ZZZZ999999 Description: A customer can damage a printer by improperly removing the paper cassette. Improper removal usually consists of pulling up or pushing down excessively on the paper cassette before it is fully removed from the printer.

  • Page 902

    LJ 4 Plus/4M Plus and LJ 4/4M Paper Jams in Optional 500-Sheet Lower Cassette Service Note Number: C2001A-01 Description: Misadjustment of the counter-balance adjustment on the 500-sheet optional lower cassette is a leading cause of paper jams. Either no-picks or multi-picks will occur, resulting in 13 and/or 41 errors. Solution: Follow these instructions to adjust the cassette: 1 Fill the cassette completely full of paper of all the same weight (do...

  • Page 903

    (paper that does not meet HP specifications or that is damaged). Solution: A modified corner tab was designed to correct this problem.

  • Page 904

    Accordion Jams in Output Assembly Service Note Number: C2001A-03A Associated Part Numbers: RF5-0425-000CN, quantity of 4 Description: Accordion jams occur on the LaserJet 4 as the paper leaves the fusing assembly and enters the output stacker. The leading edge of the paper may catch in the output stacker and fold up like a fan or an accordion.

  • Page 905

    Solution: HP has developed a right-side shim that enhances the performance of the lower cassette (Tray 3). The shim is designed to be used with letter/legal size paper. The shim installs in the lower cassette (Tray 3) between the side-guide adjustment and the side rail of the tray.

  • Page 906

    The shim kit is user-installable and available to service providers or end users. The shim kit can be ordered free of charge by calling HP Distribution at (970) 339-7009. Callers should request the HP Shim Upgrade Kit, part number C3916-67906.

  • Page 907

    Image Skew or Paper Damage (feeding from the 250- sheet tray) Service Note Number: NONE Associated Part Numbers: RF5-0369-000CN - hinge (front), RB1-2259-000CN - hinge (back) Description: Skewed print images, and/or damage to the left edge of the paper can result when a paper weight is missing from the cavity of the 250-sheet paper tray.

  • Page 908

    LaserJet 4Si Missing Scan Lines, 70-110 mm from Top of Page Service Note Number: C2010A-02 Associated Part Numbers: RG5-0381-180CN (Job Offset Assembly) Description: An intermittent print-quality defect may occur when the job-offset feature is used to print multiple-page jobs. Missing scan lines, approximately 70 to 110 mm from the top of the page, are caused when the bumper that is mounted on the Job Offset Assembly becomes deformed.

  • Page 909

    Preventing Jams: Face Up or Output Stacker Service Note Number: C2010A-03 Associated Part Numbers: RB1-0557-040CN (Paper Guide) Description: When printing jobs to the face-up tray with an output stacker (C2801A), the potential exists for an increase in the number of paper jams.

  • Page 910

    Paper Jamming and Feed Problems Associated Part Numbers: RF5-0041-000CN (Paper Feed Rollers) Description: Since introduction, the paper feed rollers have been replaced more frequently than any other part. These rollers have been life-tested at nearly 300K pages without any problem. Theoretically, these parts should not need replacement until regularly scheduled (200,000 page) user maintenance.

  • Page 911

    LJ IIIP, IIP Plus, IIP Moaning Sound in Separation Pad Associated Part Numbers: RG1-1912-080CN - separation pad Description: After a certain amount of printer usage, the combination of separation pad wear and the use of smoother papers can cause a vibration in the separation pad assembly. The vibration occurs at a resonant frequency while paper is being fed into the printer.

  • Page 912: Compressed Print

    Compressed Print Associated Part Numbers: RG1-1777-000CN - drum drive gear assembly Description: On rare occasions, you may see compressed print on a LaserJet IIP. The print may be compressed anywhere on the page. It may look like text compressed into a thin line or appear as a gap between lines.

  • Page 913

    Why does this happen? When something causes the toner cartridge to freeze up, the shaft on the drum drive gear continues to turn for a short period of time but the gear does not. This can later cause the toner cartridge drum to stop turning momentarily due to slippage between the deformed gear and the shaft (even though the rest of the printer is functioning normally).

  • Page 914

    Description: On rare occasion, when using the HP PostScript Cartridge (HP 33439P/Q) with a LaserJet IIP, a continuous PS BUSY condition can occur if auto continue is ON and the document being printed is longer than 1 or 2 pages. If the page is printed, this condition may result in missing lines, shifted text, and some malformed letters.

  • Page 915

    Description: Some changes have occurred to the fusing assemblies used in the HP LaserJet IIP, IIP+ and IIIP printers. All assemblies are fully compatible with all LaserJet IIP/IIP+/IIIP printers, with the exception of the original fusing assembly used in the LaserJet IIP printer (see Service Notes 33471A-02B and 33471AB-01B for details).

  • Page 916

    LJ II, III Potential Safety Issue Following Fuser Repair Service Note Numbers: 33440A/AB/AU-12, 33447A/AB/AU-09, 33449A/AB-05, 33459A/AB-03 Associated Part Numbers: RA1-3959-000CN, RA1-3960- 000CN Description: There have been reports of damage incurred to the left and/or right fusing assembly covers of the LaserJet II, IID, III, and IIID printers as a result of repair or replacement of the fusing assembly.

  • Page 917

    Solution: When servicing these printers, ensure that the left and right fusing assembly covers are undamaged and properly fastened in place upon completion of the repair. The cover can be damaged if all the wires routed beneath the covers are not positioned properly prior to tightening the cover screws.

  • Page 918

    Light-Brown Stain on Front Side of Duplexed Page Service Note Number: 33447A/AB/AU-10,33459A/AB-04 Associated Part Numbers: RG1-1356-000CN, RG1-2498-000CN Description: A light-brown streak can appear on the front side of a duplexed page when the duplex feature is not used for several weeks. The stain is approximately 10 mm (3/8"...

  • Page 919

    Solution: The problem will typically resolve itself after 10-50 pages have been run through the duplex portion of the printer. This process cleans the surface of the oblique roller. If you must replace the roller, prior to installing the new roller in the printer, be sure to rub the surface of the new roller with some clean paper to remove any excessive build- up of the preservative.

  • Page 920

    Duplex Jamming: Duplex Drive Roller Assembly Associated Part Numbers: RG1-1345-060CN Description: The lower and upper duplex guide assemblies (figures 8-24 and 8-25 in the IID/IIID service manual) are used to properly position the paper left-to-right prior to its passing a second time through the printer.

  • Page 921

    If the printer needs to be transported, install the packing rods to properly support the switchback assembly. If the rods have been disposed of or misplaced, they can be ordered from HP Parts Direct (800) 227-8164, part number RA1-8420-000CN.

  • Page 922

    If you encounter regular complaints from customers that their envelopes will not work properly with the HP envelope feeders, it might be well worth your time to test a variety of envelopes in your area so that you can make some worthwhile recommendations.

  • Page 923

    Jams in the Power Envelope Feeder: 13 PAPER JAM Error Indication Associated Part Numbers: RG1-0718-000CN (IID Paper Control PCA), RG1-2549-000CN (IIID Paper Control PCA) The power envelope feeders use the Manual Feed Sensor (PS302) in the printer to determine whether an envelope has been fed correctly into the printer.

  • Page 924

    The buildup of toner/paper dust results in random spots on the front and back of the printout. Running the HP LaserJet Cleaning Utility at regular intervals can extend the useful life of the fuser and reduce service procedures.

  • Page 925: Image Defect Table

    Image Defect Table For more information, see the page numbers below each image. Blank Page Black Page Thin Dark Vertical Image Skew (see page 276) (see page 278) Black Lines (see page 280) (see page 279) Faulty Light Print/ Faded Horizontal Lines/ Poor Fusing/ Registration...

  • Page 926

    Smudged Band Toner Smear on Vertical Fogged Right/Left Text with Overprint Right/Left Side Stripes Missing/Distorted (see page 293) (see page 293) (see page 294) (see page 295) Distortion Bubble Print Leading Edge Dropout (see page 296) (see page 296) Scatter (see page 298) (see page 297) Compressed Print...

  • Page 927: Blank Pages

    The direct-current (DC) controller is defective. • Occasional blank pages are being printed. – Check the software, sharing device, or network settings. If the printer is feeding multiple pages, the paper may not meet HP specifications. • There are multiple paper feeds. 2686A, 2686D •...

  • Page 928

    II, IID, III, IIID • The transfer corona wire or assembly is bad. • The toner cartridge or HVPS connections are bad. • The HV power supply cable is defective. • The toner cartridge drum is not rotating. – Replace the toner cartridge and inspect the gears. •...

  • Page 929: Black Pages

    Black Pages All Printers • The toner cartridge is improperly installed or is defective. • The HV contacts are dirty or the HV PCA is defective – Clean the HV contacts or replace the HV PCA. LJ 4L and 4P: The HVPS, AC power module, and DC controller are all on the same board.

  • Page 930

    • The primary charging roller is dirty because of a defective cartridge. – Replace the cartridge. • Paper does not meet HP specifications. • The static eliminator teeth are contaminated or defective. – Clean the printer. •...

  • Page 931: Image Skew

    Image Skew All Printers • The paper is loaded incorrectly. • The media does not meet HP specifications. • The rollers or separation pads are worn. • The pickup and separation rollers are worn. • The registration assembly is dirty or defective.

  • Page 932

    2686A, 2686D • The leading edge of the paper is curled. – Replace with another ream of paper. • The paper tray is defective. • The laser/scanner unit is misaligned. • The paper input door is misaligned • The registration assembly is defective. II, IID, III, IIID •...

  • Page 933: Faulty Registration

    Faulty Registration All Printers • The media does not meet HP specifications. • The paper is loaded incorrectly or the paper guides are not adjusted correctly. • The leading edge of the paper is curled. – Replace with another ream of paper.

  • Page 934

    2686A, 2686D • The registration shutter assembly is sticking or defective. (The white nylon rollers should turn freely.) – Remove the rubber bumper on the shutter. If the problem persists, replace the registration shutter assembly. • The paper tray is defective. •...

  • Page 935

    Drive gears are worn or broken. • Pickup, oblique, or registration rollers are worn. Light Print/Faded Print All Printers • The media does not meet HP specifications. • The toner cartridge is low on toner or empty. • The print density is improperly set. •...

  • Page 936

    II, IID, III, IIID • The transfer corona assembly is defective. • The HV power supply or cable is defective. IIP, IIP, IIIP, IIISi, 4Si • The transfer roller is defective. • The HV PCA or HV contact assembly is defective. •...

  • Page 937

    Horizontal Lines/Repetitive Defect All Printers • The toner cartridge is not seated properly or is defective. • The laser/scanner assembly is defective. • The gear train is defective. • The DC controller PCA is defective. • A repetitive defect has occurred if the lines are repeated at consistent intervals.

  • Page 938

    Poor Fusing/Character Voids All Printers • The media does not meet HP specifications. • The transparencies are defective. • Printing is on the wrong side of the paper. • The fuser is defective. – Replace the fuser. • The transfer roller is defective.

  • Page 939: Background Scatter

    – Adjust the print density to a darker setting. • The toner cartridge is defective. • Media does not meet HP specifications. • The paper may be wet or too dry. – Optimum humidity should be between 40 and 60 percent.

  • Page 940

    5L/6L • Printing is on the envelope seams. – Switch envelopes or move text to an area with no seams. • Printing is on the wrong side of paper. – Turn the paper over. In the future, check to see if the ream label indicates the proper print side.

  • Page 941

    Back of Page Dirty All Printers • Toner has leaked from the toner cartridge. – Replace the toner cartridge. • The inside of the printer is dirty. • The transfer roller is dirty. • The feed rollers are dirty. • The fuser is contaminated.

  • Page 942

    Thin Vertical White Lines/Stripes All Printers • The toner cartridge is defective or nearly empty. – Gently shake the toner cartridge and reseat. If the error persists, replace the toner cartridge. • Foreign obstacles are in the path of the laser beam. –...

  • Page 943

    IIISi, 4Si • The focusing lenses in the scanner assembly may be dirty. 4, 4 Plus, 4L, 4P • The beam-to-drum mirror is contaminated. Improperly Sized Image All Printers • Check the microswitches in the paper tray. • The paper size specified in the software does not match the actual paper size.

  • Page 944

    Smudged Band with Overprint All Printers • The gear train assembly in the main motor is not engaging with the toner cartridge drum gears. – Replace the gear train and/or main motor assembly. • The fusing assembly is dirty or defective. •...

  • Page 945

    • The inside of the printer is dirty. IIP, IIP, IIIP • The media does not meet HP specifications. • The fusing assembly is dirty or defective. – Use a self-test cleaning page to clean the fusing assembly, or replace the fusing assembly.

  • Page 946

    Right or Left Hand Text Missing/Distorted All Printers • A foreign object is in the path of the laser beam. II, IID, III, IIID • The toner cartridge is empty. • The instruction label on the beam mirror shutter has come loose. •...

  • Page 947

    Distortion All Printers • The toner cartridge is defective. • The gear train is damaged. 2686A, 2686D • There is a problem with the paper drive. – Check all parts of the drive mechanism, gear train, and motor. • The main motor is defective. •...

  • Page 948

    The toner cartridge is leaking. • Paper does not meet HP specifications. • The HVPS is defective. Leading Edge Scatter All Printers • The media does not meet HP specifications; a single sheet of paper may be defective. Image Defect Table – 297...

  • Page 949

    The fuser inlet guide is set improperly. – Replace the fuser inlet guide (see chapter 6 in the service manual). • Paper is defective, improperly loaded, or does not meet HP specifications. • The HVPS or transfer roller/wire is defective. 5L/6L •...

  • Page 950

    Compressed Print All Printers • The toner cartridge is defective. • The drive gear in the drum is broken or worn. IIP, IIP+, IIIP • The gear assembly of the drum drive is defective. Portion of Page Blank All Printers •...

  • Page 951: White Horizontal Line

    White Horizontal Line 5L/6L • The toner cartridge is defective. Horizontal Fogged Stripes III, II • The laser scanner cable is defective. • The toner cartridge is damaged. – Replace the toner cartridge and HV cable. 2686A, 2686D • The toner cartridge is defective. •...

  • Page 952

    Wavy Print All Printers • The scanner unit is defective. IIID, III, IID, II • The laser scanner assembly is defective. • The laser scanner cable is defective. 2686D, 2686A • The DC controller PCA is defective. Image Defect Table – 301...

  • Page 953

    Repetitive Image Defect Ruler LJ 6L/5L Use the ruler shown below to measure the approximate distances between repetitive image defects. 302 – Image defects...

  • Page 954

    Repetitive Image Defect Ruler LJ 5Si First occurrence of print defect Registration Roller 44 mm (1.73 in) Toner Cartridge Primary Charging Roller 44.4 mm (1.75 in) Face-Up Delivery Roller 47 mm (1.86 in) Toner Cartridge Developing Roller 53.5 mm (2.11 in) Transfer Roller 58.4 mm (2.3 in) Fuser Lower Roller 94 mm (3.71 in) Toner Cartridge Photosensitive Drum 94 mm (3.71 in)

  • Page 955

    Repetitive Image Defect Ruler LJ 6P/5P Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Developing Cylinder 25 mm (1.0 in) Primary Charging Roller 38 mm (1.5 in) Face Down Delivery (Upper) Roller 38 mm (1.5 in) Transfer Roller 44 mm (1.75 in) Fusing Pressure Roller 47 mm (1.88 in) Upper Fusing Assembly Film 75 mm (2.94 in)

  • Page 956

    Repetitive Image Defect Ruler LJ 5 Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Primary Charging Roller 38 mm (1.5 in) Developing Roller 51 mm (2.0 in) Transfer Roller 54 mm (2.13 in) Upper and Lower Fusing Roller (LJ4 ONLY) 63 mm (2.5 in) Upper and Lower Fusing Roller (LJ4 Plus ONLY) 79 mm (3.13 in) EP-E Cartridge Photosensitive Drum 94 mm (3.69 in)

  • Page 957

    Repetitive Image Defect Ruler LJ 4V Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Primary Charging Roller 43 mm (1.69 in) Face Down Delivery (Upper) Roller 50 mm (2.0 in) Registration Roller 50 mm (2.0 in) Transfer Roller 61 mm (2.38 in) Developing Cylinder 63 mm (2.5 in)

  • Page 958

    Repetitive Image Defect Ruler LJ 4P, 4L Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Developing Cylinder 25 mm (1.0 in) Primary Charging Roller 38 mm (1.5 in) Face Down Delivery (Upper) Roller 38 mm (1.5 in) Transfer Roller 44 mm (1.75 in) Fusing Pressure Roller 47 mm (1.88 in) Upper Fusing Assembly Film 75 mm (2.94 in)

  • Page 959

    Repetitive Image Defect Ruler LJ 4+, 4 Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Primary Charging Roller 38 mm (1.5 in) Developing Roller 51 mm (2.0 in) Transfer Roller 54 mm (2.13 in) Upper and Lower Fusing Roller (LJ4 ONLY) 63 mm (2.5 in) Upper and Lower Fusing Roller (LJ4 Plus ONLY) 79 mm (3.13 in) EP-E Cartridge Photosensitive Drum 94 mm (3.69 in)

  • Page 960

    Repetitive Image Defect Ruler LJ 4Si, IISi Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Primary Charging Roller 38 mm (1.5 in) Upper Registration Roller 44 mm (1.75 in) Developer Roller 50 mm (2.0 in) Transfer Roller 63 mm (2.5 in) Fuser Roller or Toner Cartridge Drum 94 mm (3.69 in)

  • Page 961

    Repetitive Image Defect Ruler IIP, IIP+, IIP Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Primary Charging Roller 38 mm (1.5 in) Input Feed Roller 49 mm (1.94 in) Developing Roller 51 mm (2.0 in) Transfer Roller 52 mm (2.06 in) Lower Fusing Roller 54 mm (2.13 in)

  • Page 962

    Repetitive Image Defect Ruler IID, III, IID, II Use the ruler shown below to measure the approximate distances between repetitive image defects. First occurrence of print defect Registration Assembly Transfer Roller 13 mm (0.5 in) Upper Registration Roller 38 mm (1.5 in) Lower Registration Roller 44 mm (1.75 in) Toner Cartridge Developer Roller 51 mm (2.0 in) Lower Fusing Assembly Roller 65 mm (2.56 in)

  • Page 963

    312 – Image defects...

  • Page 964: Wiring Diagrams

    Wiring diagrams Overview The chapter provides wiring diagrams for printers supported in this guide. Overview – 313...

  • Page 965

    Figure 11-1 Wiring Diagram: HP LaserJet 6L and 5L 314 – Wiring diagrams...

  • Page 966

    Figure 11-2 Wiring Diagram: HP LaserJet 5Si (1 of 5) Wiring diagrams – 315...

  • Page 967

    Figure 11-3 Wiring Diagram: HP LaserJet 5Si (2 of 5) 316 – Wiring diagrams...

  • Page 968

    Figure 11-4 Wiring Diagram: HP LaserJet 5Si (3 of 5) Wiring diagrams – 317...

  • Page 969

    Figure 11-5 Wiring Diagram: HP LaserJet 5Si (4 of 5) 318 – Wiring diagrams...

  • Page 970

    Figure 11-6 Wiring Diagram: HP LaserJet 5Si (5 of 5) Wiring diagrams – 319...

  • Page 971: Main Wiring Diagram

    Figure 11-7 Main Wiring Diagram: HP LaserJet 5P Main Wiring Diagram FUSING ASSEMBLY FUSER THERMO- HEATING PROTECT ELEMENT Tray 1 Inter-connect 5 4 3 2 1 3 2 1 5 4 3 2 1 MEMORY J801 FORMATTER PCA J804 SCANNER...

  • Page 972

    Figure 11-8 Main Wiring Diagram: HP LaserJet 5 Wiring diagrams – 321...

  • Page 973

    Figure 11-9 Main Wiring Diagram: HP LaserJet 4V (1 of 2) 322 – Wiring diagrams...

  • Page 974

    Figure 11-10 Main Wiring Diagram: HP LaserJet 4V (2 of 2) Wiring diagrams – 323...

  • Page 975

    Figure 11-11 Main Wiring DIagram: HP LaserJet 4 Plus 324 – Wiring diagrams...

  • Page 976

    Figure 11-12 Main Wiring Diagram: HP LaserJet 4P/4MP, 4L/4ML Wiring diagrams – 325...

  • Page 977

    Figure 11-13 Main Wiring Diagram: HP LaserJet 4 326 – Wiring diagrams...

  • Page 978

    Figure 11-14 Main Wiring Diagram: HP LaserJet 4Si, IIISi (1 of 3) Wiring diagrams – 327...

  • Page 979

    Figure 11-15 Main Wiring Diagram: HP LaserJet 4Si, IIISi (2 of 3) 328 – Wiring diagrams...

  • Page 980

    Figure 11-16 Main Wiring Diagram: HP LaserJet 4Si, IIISi (3 of 3) Wiring diagrams – 329...

  • Page 981