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...

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

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    © 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 ........

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

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

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

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

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    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)

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    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...

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    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...

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    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 Adhesive Strips Or Flaps

    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, Laser Safety Statement, Canadian Doc Regulations

    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

    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: Ordering Information, 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: Control Panel Menus

    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 44: Information Menu

    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 45: Print Quality Menu

    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 46: Warranty Statement

    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 47: Control Panel

    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)

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    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 50

    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...

This manual also for:

Laserjet 4050

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