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HP 3500 series Service Manual

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hp color LaserJet
service
3500 and 3700
series printer

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   Also See for HP 3500 series

   Related Manuals for HP 3500 series

   Summary of Contents for HP 3500 series

  • Page 1

    LaserJet service 3500 and 3700 series printer...

  • Page 3

    LaserJet 3500 and 3700 series printer service manual...

  • Page 4

    UNIX® is a registered herein should be construed as trademark of.The Open Group. constituting an additional Windows, MS Windows, and warranty. HP shall not be liable Windows NT are U.S. registered for technical or editorial errors or trademarks of Microsoft omissions contained herein.

  • Page 5

    Conventions This manual uses the following conventions: is used to emphasize items that are important to the material under discussion. OLOR Bold is used for menu items to click and for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis.

  • Page 6

    ENWW...

  • Page 7: Table Of Contents

    Heavy paper ........21 HP LaserJet tough paper ......21 Preprinted forms and letterhead .

  • Page 8: Table Of Contents

    (hp color LaserJet 3700 series printer only) ....64 HP Jetdirect print servers ......64 Available enhanced I/O interfaces .

  • Page 9: Table Of Contents

    Fuser/delivery unit........183 Duplexing feed unit (HP 3700 printer only) ....185 Jam detection .

  • Page 10: Table Of Contents

    Duplex feed delivery paper sensor (PS10) removal (HP 3700 only) ........252 Rear output bin paper sensor (PS11) removal .

  • Page 11: Table Of Contents

    Tray 1 (multipurpose tray) pick-up solenoid (SL1) removal . 257 Tray 2 pick-up solenoid (SL2) removal ....257 Secondary transfer roller engaging solenoid (SL4) removal Duplex feed solenoid (SL5) removal (HP3700 only) .

  • Page 12: Table Of Contents

    Using Color ......... . 373 HP ImageREt 2400 ....... . 373 Paper selection .

  • Page 13: Table Of Contents

    HP toolbox ........

  • Page 14

    DC Controller (previously installed in another printer) replacement configuration ......463 Media sensor (PS5) replacement configuration .

  • Page 15

    Heavy paper ........21 HP LaserJet tough paper......21 Preprinted forms and letterhead .

  • Page 16

    Figure 1-1 HP Color LaserJet 3500 printer The HP Color LaserJet 3500 printer is a four-color, laser printer that prints 12 pages per minute (ppm) in both monochrome (black and white) and color. Trays. The printer comes with a multipurpose tray (Tray 1) that holds up to 100 sheets of various paper types and sizes or 10 envelopes and a 250-sheet paper feeder (Tray 2) that supports various paper sizes.

  • Page 17: Printer Configurations

    Figure 1-3 HP Color LaserJet 3700 printer The HP Color LaserJet 3700 printer is a four-color, laser printer that prints 16 ppm in both monochrome (black and white) and color. Trays. The printer comes with a multipurpose tray (Tray 1) that holds up to 100 sheets of various paper types and sizes or 10 envelopes and a 250-sheet paper feeder (Tray 2) that supports various paper sizes.

  • Page 18

    The HP Color LaserJet 3700n printer includes the features of the HP Color LaserJet 3700 printer, plus an HP Jetdirect 615n print server for easy connectivity to 10/100 base-T networks. Figure 1-5 HP Color LaserJet 3700dn printer The HP Color LaserJet 3700dn printer includes the features of the HP Color LaserJet 3700n printer, automatic 2-sided (duplex) printing, and a total of 128 MB of SDRAM.

  • Page 19: Printer Features

    If the performance of the printer is If the performance of the printer is less than this, see the HP Color less than this, see the HP Color LaserJet 3500 and 3700 series LaserJet 3500 and 3700 series...

  • Page 20

    Table 1-1 Features Feature HP Color LaserJet 3500 series HP Color LaserJet 3700 series printer printer Paper handling Prints on paper from 76 by 127 mm (3 Prints on paper from 76 by 127 mm by 5 inches) up to 215 by 355 mm (3 by 5 inches) up to 215 by 355 mm (8.5 by 14 inches).

  • Page 21: Identification, Model And Serial Numbers

    The model number and serial numbers are listed on identification labels located on the rear of the printer. The model number is alphanumeric, such as Q1319A for the HP Color LaserJet 3500 printer. The serial number contains information about the country/region of origin, the printer version, production code, and the production number of the printer (see Figure 1-7).

  • Page 22

    Power and regulatory information The identification label on the rear of the printer also contains power rating and regulatory information as shown in Figure 1-8. CAUTION Converting the voltage on the printer can damage the printer. Do not use any voltage other than the operating voltage.

  • Page 23: Site Requirements

    (There must be enough space around the printer for proper access and ventilation. See the figures Space requirements for the HP Color LaserJet 3500 series printer Space requirements for the HP Color LaserJet 3700 series printer with optional Tray 3, on the following pages.)

  • Page 24: Space Requirements

    Depth: 1480 mm (58.3 in.) Width: 699.5 mm (27.6 in.) Figure 1-10 Space requirements for the HP Color LaserJet 3700 series printer with optional Tray 3 Height: 862 mm (34 in.) Depth: 1480 mm (58.3 in. Width: 699.5 mm (27.6 in.

  • Page 25: Electrical Specifications, Environmental Specifications

    HP Color LaserJet 3700dtn 0.25 Note These values are subject to change. For current information, see http://www.hp.com/support/clj3500 for the HP Color LaserJet 3500 series printer or http://www.hp.com/support/clj3700 for the HP Color LaserJet 3700 series printer. PowerSave default activation time is 30 minutes.

  • Page 26: Supply Storage Requirements

    Supply storage requirements The life of supplies is greatly affected by their storage environment. Use Table 1-6 to determine the shelf life of stored supplies. Table 1-6 Supply storage requirements Item Storage time Storage condition Temperature Normal (maximum of 0° to 35° C (32° to 95° F) 2.5 years) Severe (maximum of High: 35°...

  • Page 27: Printer Specifications, Duty Cycle

    HP Color LaserJet 3700 series printer. Duty cycle The HP Color LaserJet 3500 series printer’s maximum duty cycle is 45,000 pages per month. The HP Color LaserJet 3700 series printer’s maximum duty cycle is 55,000 pages per month. Printer specifications 13...

  • Page 28

    Installation and configuration chapter. Figure 1-11 Front view, HP Color LaserJet 3500 and 3700 series printers (shown with additional 500- sheet paper feeder) on/off switch Tray 3 (optional; 500 sheets of standard paper) Tray 2 (250 sheets of standard paper)

  • Page 29: Selecting Paper

    LaserJet 3700 series, and then select manuals. It is possible that paper could meet all of the guidelines in this chapter or the HP LaserJet Printer Family Print Media Specification Guide and still not print satisfactorily. This may be due to abnormal characteristics of the printing environment or to other variables over which Hewlett- Packard has no control (for example, extremes in temperature and humidity).

  • Page 30: Paper That Can Damage The Printer

    HP Color LaserJet 3500 and 3700 series printer image fusers. Select paper that can tolerate temperatures of 190° C (374° F) for 0.1 second. HP produces a selection of paper that is designed for the HP Color LaserJet 3500 and 3700 series printer.

  • Page 31

    The printer supports a wide range of standard and custom sizes of print media. Capacity can vary depending on media weight and thickness and environmental conditions. Smoothness—100 to 250 (Sheffield). Use only transparencies designed for use with HP Color LaserJet printers. This printer can detect transparencies that were not designed for use with HP Color LaserJet printers.

  • Page 32

    Manual 2-sided printing. Any of the supported paper sizes and types listed for printing from Tray 1 can be manually duplexed. See the 2-sided (duplex) printing section in the HP Color LaserJet 3500 and 3700 series printer User Guide for more information.

  • Page 33: Printing On Special Media, Glossy Paper, Colored Paper

    Hewlett-Packard recommends using HP Color LaserJet Soft Gloss paper with this printer. HP products are designed to work together for optimum printing results. If HP Color LaserJet Soft Gloss paper is not used with this printer, print quality may be compromised.

  • Page 34: Envelopes

    For long-edge printing, envelopes should be loaded long edge first, face down. See the Printing envelopes from Tray 1 section in the HP Color LaserJet 3500 and 3700 series printer User Guide to change the printer drivers envelope orientation.

  • Page 35: Heavy Paper, Hp Laserjet Tough Paper

    Handle HP LaserJet Tough paper using the edges. Oils from your fingers deposited on HP LaserJet Tough paper can cause print quality problems. Use only HP LaserJet Tough paper with this printer. HP products are designed to work together for optimum printing results.

  • Page 36: Preprinted Forms And Letterhead

    During the fusing process, wet ink can come off of preprinted paper. When duplex printing on the HP Color LaserJet 3700 series printer, load preprinted forms and letterhead into Tray 2 and Tray 3 first side up, top edge toward the back of the tray. To load preprinted forms and letterhead into Tray 1, load them with the first side down, bottom edge in first.

  • Page 37

    Media weight Table 1-13 shows equivalent weights for different grades of paper. A boldface type value indicates a commonly available standard weight for that grade. Note Text and book grades marked with an asterisk (*) actually calculate to 51, 61, 71, and 81 but are rounded to standard book or text weights of 50, 60, 70, and 80.

  • Page 38: Protecting The Environment

    In many countries/regions, this product’s printing supplies (print cartridges, fuser, and transfer unit) can be returned to HP through the HP Printing Supplies Returns and Recycling Program. An easy- to-use and free takeback program is available in over 48 countries/regions. Multi-lingual program information and instructions are included in every new HP LaserJet print cartridge and supplies package.

  • Page 39: Material Restrictions, For More Information

    Recycled paper This product is capable of using recycled papers when the paper meets the guidelines outlined in the HP LaserJet Printer Family Print Media Specification Guide. This product is suitable for the use of recycled paper according to DIN 19309.

  • Page 40

    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 41: Safety Statements, Laser Safety Statement, Toner Safety, Canadian Doc Regulations, Emi Statement (korea)

    Toner safety Hewlett-Packard encourages responsible disposal of HP LaserJet printer supply items through its Environmental Collection Program. For details on this program, see the recycling instruction guide enclosed with each supply item.

  • Page 42: Laser Statement For Finland

    överskrider gränsen för laserklass 1. HUOLTO HP Color LaserJet 3500, 3500n, 3700, 3700n, 3700dn, 3700dtn -kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu henkilö. Tällaiseksi huoltotoimenpiteeksi ei katsota väriainekasetin vaihtamista, paperiradan puhdistusta tai muita käyttäjän käsikirjassa lueteltuja, käyttäjän tehtäväksi...

  • Page 43: Declaration Of Conformities

    (2) this device must accept any interference received, including interference that may cause undesired operation. 3) For regulatory purposes, this product is assigned a Regulatory model number. This number should not be confused with the marketing names (HP Color LaserJet 3500 series) or the product numbers (Q1319A, Q1320A). Boise, Idaho USA...

  • Page 44: Printer Description

    4) For regulatory purposes, this product is assigned a Regulatory model number. This number should not be confused with the marketing names (HP Color LaserJet 3700 series) or the product numbers (Q1321A, Q1322A, Q1323A, Q1324A). 5) The suffix letter 'A' in the model number may be replaced by 'M', 'Q', 'V', or 'W' for early marketing or other prototype units. However, their construction is identical to units having a product number with suffix letter of 'A'.

  • Page 45

    Declaration of Conformity according to ISO/IEC Guide 22 and EN45014 Manufacturer’s Name: Hewlett-Packard Company Manufacturer’s Address: 8000 Foothills Blvd. Roseville, CA 95747-5677, U.S.A. declares that the product Product Name: Jetdirect en3700 External Print Server Regulatory Model Number J7942A conforms to the following Product Specifications: Safety: EN60950 (1992) +A1,A2,A3,A4,AII / IEC 950 (1991) +A1,A2,A3,A4 EN60825-1 (1994) / IEC 825-1 (1993), Class 1...

  • Page 46

    32 Printer description ENWW...

  • Page 47: Table Of Contents

    Limited Warranty Statement ......40 HP maintenance agreements ......41 On-site service agreements .

  • Page 48: Service Approach, Parts And Supplies

    8 for additional ordering information. By phone: Hewlett-Packard Customer Support-Americas (HPCS-A) (800) 227-8164 (U.S. only) Hewlett-Packard Customer Support-Europe (HPCS-E) (49) (70) 311 4225 (3) By Internet: Hewlett-Packard Parts Direct http://partsdirect.hp.com By mail: Hewlett-Packard Company Hewlett-Packard Company HPCS-A HPCS-E 8050 Foothills Blvd. Wolf-Hirth Straße 33 Roseville, CA 95678 D-7030 Böblingen, Germany...

  • Page 49: Ordering Supplies, Exchange Program, World Wide Web, Hp Service Parts Information Cd-rom

    United Kingdom (07) (34) 441 212 Other local phone numbers may also be available Exchange program HP offers remanufactured assemblies for some parts. These are identified in chapter 8 and can be ordered from Hewlett-Packard Customer Support-Americas (HPCS-A) or Hewlett-Packard Customer Support-Europe (HPCS-E).

  • Page 50: Ordering Related Documentation And Software

    Call (800) 743-8305 in the U.S. or (800) 268-1221 in Canada. Other areas Outside of North America and Europe, contact the local HP sales office for assistance in obtaining technical support for resellers and service technicians. Ordering related documentation and software Table 2-1 shows where to order related documentation and software.

  • Page 51: Warranty Statement, Hewlett-packard Limited Warranty Statement

    HP does not warrant that the operation of HP products will be uninterrupted or error free. If HP is unable, within a reasonable time, to repair or replace any product to a condition as warranted, you will be entitled to a refund of the purchase price upon prompt return of the product.

  • Page 52

    THE WARRANTY TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT LAWFULLY PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU. 38 Service approach ENWW...

  • Page 53: Limited Warranty Statement

    To obtain warranty service, please return the product to place of purchase (with a written description of the problem and print samples) or contact HP customer support. At HP's option, HP will either replace products that prove to be defective or refund your purchase price.

  • Page 54

    Color LaserJet Image Fuser Kit and Image Transfer Kit Limited Warranty Statement This HP product is warranted to be free from defects in materials and workmanship until the printer provides a low-life indicator on the control panel. This warranty does not apply to products that (a) have been refurbished, remanufactured or...

  • Page 55: Hp Maintenance Agreements, On-site Service Agreements

    Check with your local HP dealer to determine the services available to you. On-site service agreements To provide you with the level of support best suited to your needs, HP has on-site service agreements with a selection of response times.

  • Page 56

    42 Service approach ENWW...

  • Page 57: Checking The Package Contents

    (hp color LaserJet 3700 series printer only) ....64 HP Jetdirect print servers ......64 Available enhanced I/O interfaces .

  • Page 58

    HP Color LaserJet 3500 USB cable Power cable Four print cartridges CD-ROM (the CD-ROM contains the user guide) Control panel overlay Getting started guide Figure 3-2 Additional contents shipped with the HP Color LaserJet 3500n printer 44 Installation and configuration ENWW...

  • Page 59

    Power cable Note The items listed here are for the external print server connection. Figure 3-3 HP Color LaserJet 3700, 3700n, or 3700dn printers package contents HP Color LaserJet 3700, 3700n, or 3700dn Power cable Four print cartridges CD-ROM (the CD-ROM contains the user guide)

  • Page 60

    CD-ROM (the CD-ROM contains the user guide) Control panel overlay Getting started guide Note Parallel and USB cables are not included with HP Color LaserJet 3700 series printers. Use an IEEE 1284-compliant, parallel cable or a standard, two-meter USB cable. 46 Installation and configuration ENWW...

  • Page 61: Unpacking The Printer

    Save all the packing materials in case you need to repack and transport the printer at a later date. WARNING! The printer weighs approximately 33.5 kg (73.3 lbs). HP recommends having two or more people lift or move the printer.

  • Page 62

    WARNING! Do not lift the printer by the Tray 2 handle. If you are using an optional 500-sheet paper feeder, lift the printer using the handles and align the pegs on Tray 3. Lower the printer onto the tray. Note Only one Tray 3 (500-sheet input tray) can be installed.

  • Page 63

    Remove all external orange tape, orange protectors, and other packaging material. Open Tray 2 and Tray 3 (if necessary), and remove the orange shipping lock inside each tray. Unpacking the printer 49 ENWW...

  • Page 64

    Open the lower rear door, and make sure that the two blue pressure release lever actuators are in the upright position. The two release levers are located on the left and right side of the lower rear door. Close the lower rear door. Lift the front door handle, and pull down the front door.

  • Page 65

    CAUTION Do not place anything on the transfer unit. Do not touch the top of the transfer unit or the contacts on the left side of the transfer unit. Remove the orange tape and orange shipping locks on the rear, left, and right sides of the transfer unit.

  • Page 66

    Installing the print cartridges Remove a new print cartridge from the bag. Grasp both sides of the print cartridge and distribute the toner by gently rocking the cartridge from side to side. Remove and discard the orange shipping tape and the shipping locks from the new print cartridge.

  • Page 67: Installing The Print Cartridges

    Locate the color slot for the print cartridge. Align the print cartridge with the tracks inside the printer and, using the handle, insert the cartridge. Repeat this procedure for the remaining three cartridges. Firmly close the front door. Installing the print cartridges 53 ENWW...

  • Page 68

    Loading paper into Tray 3 (optional) Pull the tray out of the printer. Adjust the length guides. • Letter-size paper: Raise the blue rear stop. • A4-size paper: Lower the blue rear stop. Adjust the width guides. • Letter-size paper: Press the center of the side width guides outward as far as possible. •...

  • Page 69: Loading Paper Into Tray 3 (optional)

    Load the paper into the tray. If this is special paper, such as letterhead, load it with the side to be printed down and the top edge toward the front of the tray. Note Do not fan paper before loading. Make sure the stack of paper is flat in the tray at all four corners, and keep it below the height tabs.

  • Page 70

    Loading paper into Tray 2 Pull Tray 2 out of the printer. Move the side width guides until the blue arrows on the width guides point to the size of paper you are loading. On the back of the tray, press the blue ridges and slide the length guides until the arrow symbol points to the paper size you are loading.

  • Page 71: Loading Paper Into Tray 1 (optional Procedure), Loading Paper Into Tray 1 (optional Procedure)

    Note Do not fan the paper before loading. Push down on the stack of paper to lock the metal lift plate into place. Make sure that the stack of paper is flat and that the paper is below the height tabs. Slide the tray back into the printer.

  • Page 72

    Note If printing special media, such as envelopes, use Tray 1. Slide out the tray extender and, if necessary, open the additional tray extender. Slide the width guides slightly wider than the print media. Remove any unused print media, and close the tray when finished printing. 58 Installation and configuration ENWW...

  • Page 73: Connecting Power

    Connecting power Connect the AC power cord to the printer and to a power outlet. Note Do not connect the printer to the computer or to the network at this time. Turn the printer on. After a minimum of two minutes, the green ready light turns on. Connecting power 59 ENWW...

  • Page 74: Testing The Printer Operation

    Installing a new control panel overlay (optional) Overlays are available for several languages and come shipped with the printer. If you are setting up a printer for a language other than English, complete the following procedure. Select the language from the sheet of adhesive control panel overlays. Position the new overlay over the top of the control panel.

  • Page 75: Using Powersave Time

    Using PowerSave Time The adjustable PowerSave Time feature reduces power consumption when the printer has been inactive for an extended period. You can set the length of time before the printer goes into PowerSave mode to 1 MINUTE, 15 MINUTES, 30 MINUTES, or to 1 HOUR, 1.5 HOURS, 2 HOURS, or 4 HOURS.

  • Page 76: Connecting The Usb Cable

    USB configuration All printer models support USB connections. The USB port is on the back of the printer. Connecting the USB cable Plug the USB cable into the printer. Plug the other end of the USB cable into the computer. USB connection USB port USB connector...

  • Page 77: Parallel Configuration (hp Color Laserjet 3700 Series Printer Only)

    Parallel configuration (hp color LaserJet 3700 series printer only) The HP Color LaserJet 3700 printer supports network and parallel connections at the same time. A parallel connection is made by connecting the printer to the computer using a bidirectional parallel cable (IEEE-1284 compliant) with a b-connector plugged into the printer parallel port.

  • Page 78: Network Configuration, Enhanced I/o (eio) Configuration, Hp Jetdirect Print Servers

    Configure device menu. HP Jetdirect print servers An HP Jetdirect print server (network card) can be installed in the printer EIO slot.These print server cards support multiple network protocols and operating systems. HP Jetdirect print servers facilitate network management allowing you to connect a printer directly to your network at any location.

  • Page 79: Netware Networks, Windows And Windows Nt Networks, Appletalk Networks, Unix/linux Networks

    HP Jetdirect print server. UNIX/Linux networks Use the HP Jetdirect printer installer for UNIX utility to set up the printer on HP-UX or Sun Solaris networks. For setup and management on UNIX or Linux networks, use HP Web Jetadmin.

  • Page 80: Printer Software, Printer Drivers

    For a list of the network environments supported by the network administrator software components, Network configuration. For a list of printer drivers, updated HP printer software, and product support information for the HP Color LaserJet 3500 series printer, go to http://www.hp.com/support/clj3500. For the HP Color LaserJet 3700 series printer, go to http://www.hp.com/support/clj3700.

  • Page 81: Software For Networks

    /www.hp.com/support/clj3700. Software for networks For a summary of available HP network installation and configuration software solutions, see the HP Jetdirect Print Server Administrator’s Guide. You can find this guide on the CD included with the printer. Printer software 67 ENWW...

  • Page 82: Utilities

    It can be installed and run on a variety of systems. To download a current version of HP Web Jetadmin and, for the latest list of supported host systems, visit HP Customer Care Online at http://www.hp.com/go/webjetadmin.

  • Page 83

    You can view the HP toolbox when the printer is directly connected to your computer or when it is connected to a network. You must have performed a complete software installation to use the HP toolbox. Embedded Web server (available for the HP Color LaserJet 3700 series...

  • Page 84: Other Components And Utilities

    Table 3-3 Windows Macintosh OS Network administrator Software installer — PostScript Printer Description files HP Web Jetadmin — a browser- automates the printing (PPDs) — for use with the Apple based system management tool. http://www.hp.com/go/ system installation PostScript drivers that come with...

  • Page 85: Setting Security On The Printer, Locking The Control Panel

    You can use HP Web Jetadmin software, the HP LaserJet Utility for Macintosh, or an ASCII escape sequence to perform this procedure. For instructions on locking the printer control panel using either the HP Web Jetadmin software or the HP LaserJet Utility for Macintosh, see the online Help for these utilities.

  • Page 86

    The commands must also be sent to the printer by using a DOS COPY command or an ASCII file download utility. The PJL Technical Reference Manual is located on CD-ROM, part number 5961-0976. Order a copy of this manual from the HP website at http://www.hp.com.

  • Page 87: Printer Memory For The Hp Color Laserjet 3700 Series Printer

    Additional memory also allows the printer to print multiple, collated copies at the maximum speed. Note Single in-line memory modules (SIMMs) used on previous HP LaserJet printers are not compatible with this printer. Note...

  • Page 88

    Installing memory and font DIMMs You can install more memory for the printer, and you can also install a font DIMM to allow the printer to print characters for languages such as Chinese or the Cyrillic alphabet. Note Static electricity can damage DIMMs. When handling DIMMs, either wear an antistatic wrist strap, or frequently touch the surface of the DIMM antistatic package and then touch bare metal on the printer.

  • Page 89: Installing Memory And Font Dimms

    Open the DIMM access door by gently prying it with a flat-bladed screwdriver. Remove the door by pulling the door toward the back of the printer. Loosen the screws that hold the formatter door to the printer and remove the formatter door. Remove the DIMM from the antistatic package.

  • Page 90

    Holding the DIMM by the edges, align the notches on the DIMM with the bars in the DIMM slot. Firmly press the DIMM straight into the slot. Close the locks on each side of the DIMM until they snap into place. Note If you have difficulty inserting the DIMM or closing the latches, make sure the notches on the bottom of the DIMM are aligned with the bars in the slot.

  • Page 91

    Align the formatter door in the tracks at the bottom of the slot, and turn the screws to secure the formatter door to the printer. Replace the DIMM access door by inserting the tabs on the door into the slots on the printer. Swing the door shut.

  • Page 92: Enabling Memory

    12 If you installed a memory DIMM, go to Enabling memory. If you installed a language font DIMM, go to Enabling the language font DIMM (hp color LaserJet 3700 only). Enabling memory If you installed a memory DIMM, set the printer driver to recognize the newly added memory.

  • Page 93: To Check Dimm Installation, Checking Dimm Installation (hp Color Laserjet 3700 Only)

    Enabling the language font DIMM (hp color LaserJet 3700 only) If you installed a language font DIMM in the printer, you must select the Font DIMM option in the printer driver for the font DIMM to work properly. To enable fonts from the PCL 6 printer driver for Windows On the Start menu, point to Settings, and click Printers.

  • Page 94: To Install The Hp Jetdirect Print Server Card

    Installing an hp Jetdirect print server card in the hp color LaserJet 3700 series printer You can install an HP Jetdirect print server card in the base model printer, which comes with an open EIO slot. To install the HP Jetdirect print server card Turn the printer off.

  • Page 95: Installing An Hp Jetdirect Print Server Card In The Hp Color Laserjet 3700 Series Printer

    You will not need these screws and cover again. Firmly insert the HP Jetdirect print server card into the EIO slot. Insert and tighten the retaining screws that came with the print server card.

  • Page 96: Installing An Hp Jetdirect En3700 External Print Server

    Reinstall the software, choosing the network installation this time. Installing an hp Jetdirect en3700 external print server Attach the HP Jetdirect en3700 external print server to a 10Base-T or to a 100Base-T local network by plugging the network cable into the network port on the rear panel.

  • Page 97

    The 10 or the 100 LED turns on, indicating a network connection, and the power/status LED blinks. After 15 seconds, the power/status LED light and the USB printer LED light appear green. The power/status LED will blink if there is network activity. Installing an hp Jetdirect en3700 external print server 83 ENWW...

  • Page 98

    Press the test button on the back of the external print server to print an HP Jetdirect configuration page. Note the IP address for reference. 84 Installation and configuration ENWW...

  • Page 99: Cleaning The Printer And Accessories

    Printer maintenance Chapter contents This chapter contains the following sections. Cleaning the printer and accessories ..... . . 86 Cleaning spilled toner ....... . 86 Cleaning mode .

  • Page 100: Cleaning Spilled Toner

    Component Cleaning Method Outside covers Use an HP Toner Cleaning Cloth (part number 5090-3379) or 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 print cartridge cavity.

  • Page 101: Cleaning Mode

    Cleaning mode During the printing process, paper, toner, and dust particles can accumulate inside the printer. Over time, this buildup can cause print-quality problems, such as toner specks or smearing. This printer has a cleaning mode that can correct and prevent these types of problems. Figure 4-1 Toner specks Figure 4-2...

  • Page 102: Supplies Life

    The life of the print cartridge depends on usage patterns and the amount of toner that print jobs require. For example, when printing text at five percent coverage, an HP print cartridge lasts an average of 4,000 or 6,000 pages, depending on the printer model. (A typical business letter is about five percent coverage.)

  • Page 103: Locating Supplies And Parts

    Approximate replacement intervals for supplies for the HP Color LaserJet 3700 series printer The following table lists the estimated replacement intervals for supplies and the printer control panel messages that prompt when to replace each item. Table 4-3 Approximate replacement intervals...

  • Page 104

    Replace a print cartridge when the printer control panel displays a REPLACE <COLOR> CARTRIDGE message. The control panel display will also indicate the color that should be replaced (unless a genuine HP print cartridge is not currently installed). Lift the front door handle and pull down the front door.

  • Page 105: Replacing Supply Items

    Remove the new print cartridge from the bag. Place the used print cartridge in the bag for recycling. Grasp both sides of the cartridge and distribute the toner by gently rocking the cartridge from side to side. Remove the orange shipping locks and the orange shipping tape from the new print cartridge. Discard the shipping tape and shipping locks according to local regulations.

  • Page 106

    Installation is complete. Place the used print cartridge in the box in which the new cartridge arrived. See the enclosed recycling guide for recycling instructions. If you are using a non-HP print cartridge, check the printer control panel for further instructions. For additional help, go to http://www.hp.com/support/clj3500...

  • Page 107

    Replacing the transfer unit Replace the transfer unit when the printer control panel displays REPLACE TRANSFER KIT. The image transfer kit contains a replacement transfer unit for this printer. WARNING! Remove any jewelry or any other metal items from you body to avoid electric shock. Lift the front door handle and pull down the front door.

  • Page 108

    Grasp the left blue handle and lift to remove the transfer unit from the printer. Note For information on how to properly dispose of the used transfer unit, go to http://www.hp.com/recycle. Using handles, remove the new transfer unit from the bag. Use the blue handles on both sides to hold the transfer unit.

  • Page 109

    Guide the left side of the transfer unit into the front door of the printer. Insert the two pegs on the left side into the holes, and then lower the right side into the door. Make sure that the blue button on the right blue handle has released (popped up). If the button has not released, grasp the right blue handle and pull the transfer unit toward you.

  • Page 110: Replacing The Transfer Unit

    11 On the printer control panel, press to highlight YES, and then press to select it. The transfer unit count is reset, the printer recalibrates, and then the printer is ready to use. Note If the old transfer unit was not at end-of-life when it was replaced (for example, if it was damaged), the transfer unit count must be reset using the printer control panel.

  • Page 111

    Replacing the fuser and pickup roller Replace the fuser when the printer control panel displays REPLACE FUSER KIT. The image fuser kit contains a replacement fuser and a Tray 2 pickup roller for this printer. After replacing the fuser, you must also replace the pickup roller. Instructions for replacing the pickup roller follow the instructions for replacing the fuser.

  • Page 112

    Slide out the lower rear door (rear output bin) tray extender. Lift and pull the lower rear door (rear output bin) while using your finger to press the tab with ridges on the left side of the door. Remove the lower rear door (rear output bin). Place your thumbs on the blue ridges (near warning label) and, using fingers, pull up on the blue latches.

  • Page 113

    Note For information on how to properly dispose of the fuser, go to http://www.hp.com/recycle. Remove the new fuser from the bag. Hold the fuser with your thumbs on the blue ridges and fingers on the blue latches. Push both sides of the fuser into the printer.

  • Page 114

    Press the black ridges on the front of the fuser until the fuser clicks into place. 10 Rotate the green levers to the up position. 11 To reattach the lower rear door (rear output bin), hold the door at a 45° angle, and fit the peg into the round hole on the right side.

  • Page 115: To Replace The Pickup Roller

    12 Press the ridges on the tab on the left side of the door, and fit the peg into the round hole. 13 Close the lower rear door (rear output bin). Note After replacing the fuser, you must also replace the pickup roller. See To replace the pickup roller for instructions.

  • Page 116

    Remove Tray 2 and place it on a flat surface. Use one finger to push on the blue side of the pickup roller until the peg comes out of the right hole. Pull down gently on the pickup roller to remove the left peg of the pickup roller from the printer. 102 Printer maintenance ENWW...

  • Page 117

    Remove the new pickup roller from the bag. Note For information on how to properly dispose of the used pickup roller, go to http://www.hp.com/recycle. Hold the blue side of the pickup roller, and insert the left peg into the round hole in the printer.

  • Page 118

    Rotate the blue side of the pickup roller until it clicks into place. Replace Tray 2. Turn the printer on. After a short time, the printer control panel might display the message NEW FUSER KIT. 10 If the message NEW FUSER KIT appears, go to step 11. If the message does not appear, you must reset the fuser count.

  • Page 119: Basic Operation

    Fuser/delivery unit........183 Duplexing feed unit (HP 3700 printer only) ....185 Jam detection .

  • Page 120

    Basic operation The HP Color LaserJet 3500 and 3700 series printer functions are divided into four systems: engine control system laser/scanner system image formation system pickup/feed system Upon receipt of printing commands from the external device via the formatter, the engine control system provides control for the laser/scanner system, the image formation system, and the pickup/ feed system and performs print operations.

  • Page 121: Operation Sequence

    Operation sequence A microcomputer in the engine control system controls the operation sequence for the printer. Table 5-1 describes the main operational periods from the point when the printer is turned on until a print operation is completed and each motor stops rotating. Table 5-1 Basic operation sequence Period Purpose...

  • Page 122

    Power-on sequences The figure below shows the sequence from the time the power is switched on until STBY period. Figure 5-2 Power-on sequence Figure notes Developing engaging/disengaging unit, later in this chapter. 108 Theory of operation ENWW...

  • Page 123: Engine Control System

    See “Secondary transfer roller engaging/disengaging control” on page 5-166. The sequences inside the dotted-line box are performed when required. The color misregistration control controls the correction of both horizontal and vertical misregistration. See Color misregistration control, later in this chapter, for more information. The image stabilization control controls the correction of the high-voltage bias output value and VIDEO signal PWM value for a stable image.

  • Page 124: Dc Controller Pcb

    DC controller PCB The DC controller PCB is controlled by the CPU on the DC controller. It controls the operation sequences of this printer. The following is the sequence of the DC controller PCB: The power switch is turned on, the DC controller is supplied with the DC power from the low- voltage power supply unit.

  • Page 125

    Figure 5-4 DC controller circuit Engine control system 111 ENWW...

  • Page 126

    Motors, solenoids, and clutches This printer has seven motors, four solenoids (three for the HP Color LaserJet 3500 series printer), and three clutches for paper feed and image formation. The specifications of such motors, solenoids, and clutches are listed in the following tables.

  • Page 127

    Table 5-2 Motor Functions Name Function Type Direction of Speed switching Failure rotation detection Drives the pick-up Stepping motor Clockwise 4-speed Feed motor roller, feed roller, (full, 1/2, 1/3, 1/4) duplexing feed roller, and fuser. Drives the feed roller. Stepping motor Clockwise/ 5-speed Delivery...

  • Page 128

    SL4 Secondary transfer roller engaging solenoid Engages and disengages the secondary transfer roller. SL5 Duplexing feed solenoid Drives the Tray 1 (multipurpose tray) pick-up roller. (Not available for the HP 3500) Table 5-4 Function of clutches Name Function CL1 Registration clutch Drives the registration roller.

  • Page 129

    Drum motor control The drum motor control controls the drive of the drum motor (M3). The drum motor is a three-phase, eight-pole DC motor with a built-in drive circuit. The drum motor drives the four color photosensitive drums, the K (black) developing cylinder, and the ITB. The drum motor operates under the control of the DRUM MOTOR ACCELERATION signal (/ DRMITBACC) and the DRUM MOTOR DECELERATION signal (/DRMITBDEC) from the DC controller.

  • Page 130

    Figure 5-8 Developing motor control circuit The DC controller judges the developing motor faulty under the following conditions and sends an error message to the formatter: Developing motor start abnormality: The interval of the /DRMITBFG signals does not become regular in 1000 ms from the start of the developing motor. Developing motor rotation abnormality: The interval of the /YMCDEVFG signal stays irregular for 100 ms or more after it has become regular.

  • Page 131: Low-voltage Power Supply Circuit

    Low-voltage power supply circuit The low-voltage power supply circuit converts AC voltage from a power supply receptacle to DC power and supplies the fuser with the power to drive its heater. The low-voltage power supply circuit has two components: Fuser control circuit: controls the temperature of the fuser. Low-voltage power supply circuit: generates the DC power required inside the printer and supplies the AC power to the fuser control circuit.

  • Page 132: Fuser Control Circuit

    Fuser control circuit The fuser control circuit controls the temperature of the fuser. The following figure shows the ceramic heater fusing method used by this printer. Figure 5-11 Ceramic heater fusing method The fuser control circuit has three main components: Fuser heater (H1): A ceramic heater that heats the fuser sleeve.

  • Page 133

    Heater temperature control The heater temperature control controls the drive signals of the fuser heater to monitor and maintain the surface temperatures of the fuser sleeve and the fuser heater at the target temperature. Figure 5-12 Heater temperature control circuit Two thermistors monitor fuser (fixing) heater temperature: Main thermistor (TH1): Monitors the print temperature and the between-sheets temperature.

  • Page 134

    This control system is divided into the following five controls. Initial rotation temperature control: Prevents damage to the fuser sleeve unit when the power switch is turned on. The CPU turns on the fuser heater before it drives the feed motor when the temperature of the heater is below 55°...

  • Page 135

    d. The relay drive circuit cuts the relay (RL301) OFF and interrupts the current to the fuser heater. Fuser heater safety circuit: The CPU monitors the output voltages of the main and sub thermistors (MAINTH and SUBTH). It cuts the relay (RL301) off and interrupts the current to the fuser heater when the MAINTH voltage is under approximately 1.0 V (240°...

  • Page 136

    Low-voltage power supply circuit This circuit converts AC voltage from the power supply receptacle to DC power and supply each load. Figure 5-13 Low-voltage power supply circuit When the power switch (SW3001) is turned on, the AC power is supplied to the low-voltage power supply circuit, where it is converted to +24 V, +5 V, and +3.3 V DC power required inside the printer.

  • Page 137

    The major recipients of the +24 V, +5 V, and +3.3 V DC power are listed below. +24 V: motors, solenoids, clutches, high-voltage power supply PCB, memory controller PCB, and optional parts +5 V: laser driver PCB, high-voltage power supply PCB, formatter, and sensors (except for the photo interrupter) +3.3 V: formatter, sensor (photo interrupter), ICs inside the control panel, DC controller, and the memory controller...

  • Page 138

    High-voltage power supply circuit This circuit applies a bias to the primary charging roller, the developing cylinder, the developing blade, the primary and secondary transfer charging rollers, and the pressure roller. The DC controller controls the high-voltage power supply circuit and generates the high-voltage bias.

  • Page 139

    The values of these biases vary according to the commands from the DC controller. Developing bias generation The developing biases (DEV1, DEV2, DEV3, DEV4) are used to adhere the toner to an electrostatic latent image formed on the photosensitive drum. They are the DC negative biases, one for each color (C, Y, M, K), generated in the developing high-voltage generation circuit in the high-voltage power supply circuit.

  • Page 140: Video Interface Control

    Video interface control The video interface enables communication between the formatter and the DC controller. The formatter uses the video interface to monitor the printer status continuously. It sends the VIDEO signal via the video interface when the printer is ready for printing. The DC controller turns the laser on/off according to the VIDEO signal.

  • Page 141

    The DC controller re-feeds the paper after a specified time from /TOP signal output and transfers the toner image from the ITB onto the paper. This aligns the leading edge of the paper and the top of the image. The paper, having had the toner image fixed on it, is delivered to the delivery tray when the print is completed.

  • Page 142

    The types and purposes of the VIDEO INTERFACE signals are described below. VDO1, /VDO1, VDO2, /VDO2, VDO3, /VDO3, VDO4, /VDO4, (VIDEO) signals (formatter output): These signals are the information of the image the printer engine is going to print. The laser drivers turn the laser diode on or off based on these signals. This printer has four laser units, one for each color.

  • Page 143

    /BD1, /BD2, /BD3, /BD4 (HORIZONTAL SYNCHRONOUS) signals (formatter input): This signal synchronizes the horizontal (main) scanning line: the reference signal in the horizontal direction of the laser beam. When the /TOP signal is received, the formatter counts the /BD signals of each color and sends each color’s VIDEO signal synchronized with each /BD signal corresponding to the specific number of scanning in sequence to the DC controller.

  • Page 144: Laser/scanner System

    Laser/scanner system The laser/scanner system forms latent images on the photosensitive drum according to the VIDEO signals sent from the formatter. The laser/scanner unit is illustrated below. Figure 5-19 Laser/scanner unit The laser/scanner unit is controlled by the DC controller and consists of four laser units and two laser driver PCBs (two each of the units sitting on one laser driver), and two scanner motors (one scanner mirror reflects two colors’...

  • Page 145

    The following is the sequence of the printing process: Upon receiving a print command from the formatter, the DC controller outputs the SCANNER MOTOR SPEED CONTROL signals (Y/M: /ACC1, /DEC1 C/Bk: /ACC2, /DEC2) and rotates the scanner motor to rotate two four-faced mirrors. Note The abbreviations Bk and K are used interchangeably and refer to the black developing operation.

  • Page 146: Laser Control

    Laser control The laser control instructs the laser driver to turn on/off the laser diode according to the LASER CONTROL signal sent from the DC controller. The laser driver PCB is divided into two. One is for Y/M, and the other for C/K. The Y/M laser driver PCB only is described here, as both are identical.

  • Page 147

    Table 5-5 LASER CONTROL signal combinations for yellow Operation mode CTRL0 CTRL1 Description Standby Laser control OFF Print Ready to emit laser by VIDEO signals Force LD ON Force the laser ON Force LD OFF Force the laser OFF The LASER CONTROL signal is used for the following controls: Laser emission control Automatic photocurrent control Horizontal synchronization control...

  • Page 148: Image Mask Control

    Horizontal synchronous control The horizontal synchronous control horizontally aligns the scanning starting position of the image. This control performs the following steps. The DC controller puts the laser driver circuit into Force LD ON mode during the unblanking interval to force the LD to emit light. (The unblanking interval is the interval when a LD emits light in the non-image area.) The laser beam is reflected from the BD mirror, fixed at the scanning starting position in the optical path of the laser beam, and sent to the BD circuit in the laser/scanner unit.

  • Page 149: Failure Detection

    Figure 5-21 Image mask control Notes on the figure • The shaded area indicates the area where an image can be written by the laser beam. • The times T1, T2, and T3 depend on the paper size. • Time T4 depends on the color. •...

  • Page 150: Scanner Motor Control

    Scanner motor control This control rotates the scanner motor to strike the laser beam at the correct position on the photosensitive drum. The scanner motor, which is integral with this drive circuit, is a three-phase, eight-pole DC brushless motor with a built-in Hall device. Figure 5-22 Scanner motor control The DC controller performs this control.

  • Page 151

    Speed control The speed control maintains the scanner motor rotation at a specified speed. The following is the sequence of steps performed by the speed control. The DC controller sends the /ACC1 signal to the scanner driver IC at the scanner motor startup to rotate the motor.

  • Page 152: Image Formation System

    Image formation system The image formation system, which serves as the nerve center of the printer, forms a toner image on paper. The DC controller controls the image formation system, which consists of units such as the developing section (four cartridges and the developing disengaging unit), the transfer section (transfer unit and secondary transfer roller), and the fuser.

  • Page 153

    Figure 5-24 Image formation system (signal paths) Image formation system 139 ENWW...

  • Page 154: Print Process

    Print process The print process can be divided into nine steps, which are executed in five blocks. A toner image is formed on paper as it goes through each process. The print process blocks and the steps performed in them are listed below. Refer to Figure 5-25 to see the placement of the blocks.

  • Page 155

    Figure 5-25 Print process diagram Image formation system 141 ENWW...

  • Page 156: Electrostatic Latent Image Formation Block

    Electrostatic latent image formation block This block consists of two steps, where an electrostatic latent image is formed on the photosensitive drums. The drum surface carries negative electrical charges in areas that are not exposed to the laser beam through the steps in this block. The image with negative charges on the drum is called an electrostatic latent image, as it is invisible to the human eyes.

  • Page 157: Development Block

    Step 2: Laser beam exposure An electrostatic latent image is formed on the photosensitive drum in this step. As the laser beam scans the negatively charged drum surface, the negative potential on the exposed area gets neutralized and forms an electrostatic latent image. Figure 5-28 Laser beam exposure Development block...

  • Page 158

    Photosensitive drum Blade Developing cylinder DC bias Stirrer Toner feed roller Figure 5-29 Image development Note The exposed area on the photosensitive drum is indicated positive in Figure 5-29 even though the actual potential on the drum is negative. This is to express the potential difference between the developing cylinder and the exposed area.

  • Page 159: Transfer Block

    Transfer block This block consists of three steps, where a toner image on a photosensitive drum is transferred onto paper. Step 4: Primary transfer The toner image on the photosensitive drum is transferred onto the ITB in this step. (The ITB is a thin seamless belt made of resins.

  • Page 160

    After the paper is fed into the primary transfer, the secondary transfer roller is raised to press the paper onto the ITB. A positive DC bias is then applied to the secondary transfer roller to charge the paper positive so that the negatively charged toner image formed on the ITB is transferred onto the paper.

  • Page 161

    Fuser block A toner image is fixed, or fused, onto paper in this block. The toner image transferred on top of the paper through the transfer block can be smeared easily by hands since it is only attracted to paper by static electricity. The toner image on paper is fused by pressure and heat to permanently print it on paper here.

  • Page 162: Cleaning Block

    Cleaning block This block consists of two steps and clears the residual toner from the ITB, photosensitive drum, and the primary charging roller. During the transfer step, not all toner is transferred from the ITB and the drums onto the paper but some remains on top of them.

  • Page 163: Developing Section

    Developing section The developing section consists of four cartridges and the developing engaging unit.The cartridges form a visible toner image on the photosensitive drum, and the developing engaging unit disengages the developing cylinder from the photosensitive drum. Below are descriptions of the cartridges and the developing engaging unit. Cartridges Each cartridge, like a monochrome cartridge, consists of a photosensitive drum, primary charging roller, developing cylinder, stirrer, etc.

  • Page 164

    Each cartridge has a built-in memory tag, into which the memory controller PCB reads/writes data. Figure 5-37 Cartridge diagram Figure notes: • M3: Drum motor • M4: Developing motor • CL2: K developing clutch 150 Theory of operation ENWW...

  • Page 165

    Developing engaging/disengaging unit The developing engaging unit has a developing engaging lever which shifts up and down as the developing engaging clutch is engaged or disengaged, being driven by the delivery motor (M2). This engages or disengages the developing cylinder from the photosensitive drum. The developing section performs the following: Memory tag control Cartridge presence detection...

  • Page 166

    Note The cartridges are driven by two motors so the K cartridge can be driven independently for monochrome operations thus preventing wear of the other cartridges (photosensitive drums). Figure 5-38 Developing engaging/disengaging unit • M2: Delivery motor • M3: Drum motor •...

  • Page 167

    Memory tag control The memory tag is a nonvolatile memory built in the print cartridge. The cartridge usage condition is monitored by reading/writing the data stored in the memory tag. The cartridge usage condition is stored in the memory tag as a memory data. The memory controller reads/writes a memory data into the tag at the specified timing upon receipt of a command from the DC controller.

  • Page 168

    Cartridge presence detection The DC controller judges the cartridge presence based on the primary transfer current. The DC controller measures the primary transfer current when the power is turned on or a door is closed. When the measurement is over the specified value, the DC controller judges it “no cartridge” and sends the error message to the formatter.

  • Page 169

    When any of the data exceeds a specified value, the DC controller judges the cartridge end of life and sends an error message to the formatter, indicating either that the cartridge is nearing end of life ("Warning"), or that the cartridge has reached end of life (“End”), depending on the readings of the above data.

  • Page 170

    Developing cylinder engaging/disengaging control This controls the disengagement of the developing cylinder from the photosensitive drum to prevent toner from being developed on the drum during non-transferring time. The developing cylinder is engaged/disengaged when the DC controller drives the developing engaging clutch (CL3) under a specified condition such as when one print is completed.

  • Page 171: Transfer Section

    Cartridge cleaning control This control is for the primary charging roller cleaning. As the printer prints pages, toner gets attracted to the primary charging rollers. Accumulated toner on the roller can cause some image defects, therefore it needs to be cleared away. The DC controller sends a command for this control every specified number of pages.

  • Page 172

    Secondary transfer unit The secondary transfer unit consists of components, such as the secondary transfer roller, secondary transfer roller engaging cam, and secondary transfer engaging sensor. The secondary transfer roller transfers the toner on the ITB to the paper. It is interlocked with the ITB.

  • Page 173

    M1: Feed motor SL4: Secondary transfer engaging solenoid M3: Drum motor PS10: Waste toner full sensor M5: Primary transfer PS16: Secondary transfer roller engaging sensor engaging motor Figure 5-43 Transfer section Image formation system 159 ENWW...

  • Page 174: Itb Cleaning Control

    ITB cleaning control This controls the removal of the residual toner from the ITB to prevent an image defect. The following is the sequence of this control. The cleaning blade on the ITB is always in contact with the ITB and scraping the residual toner off the ITB.

  • Page 175: Waste Toner Full Detection

    Waste toner full detection The DC controller monitors the waste toner full sensor (PS13) when the power is turned on, a door is closed, and a print is completed. The waste toner container has a light guide and a waste toner level sensor (PS13) on the top. The light from the light emitter on the PS13 is let in to the waste toner container through the light guide attached to the cartridge.

  • Page 176

    Transfer (ITB) unit detection The printer detects the presence of the transfer unit. The DC controller monitors the waste toner full sensor (PS13) and color misregistration sensor (PS12) during initial rotation for detection of the ITB unit. At the start of a print operation, the DC controller lets the PS12 and PS13 emit light. If the transfer unit is present, the LED light is received at the light receivers on the sensors, and vice versa.

  • Page 177: Transfer Unit Life Detection

    Transfer unit life detection The printer detects whether the transfer unit is coming to the end of its life. The DC controller monitors the accumulated rotation time of the drum motor (M3) for detection of transfer unit life. The DC controller writes the drum motor rotation time into the EEPROM in the DC controller every specified time when the drum motor rotates.

  • Page 178: Itb Self-aligning Mechanism

    ITB self-aligning mechanism This printer automatically aligns the position of the ITB to prevent tearing of the belt due to its misalignment. The alignment rollers, alignment gear, and alignment arm inside the ITB unit move the ITB feed roller back and forth to align the belt (see the figure below) as described by the following steps. The ITB has a rib on the back along the left edge of the belt.

  • Page 179: Primary Transfer Roller Engaging/disengaging Control

    Primary transfer roller engaging/disengaging control This controls the disengagement of the primary transfer roller from the photosensitive drum to transfer only K (black) toner onto ITB for monochrome print. The DC controller sends a control command and drives the primary transfer roller engaging motor (M5).

  • Page 180: Secondary Transfer Roller Engaging/disengaging Control

    Secondary transfer roller engaging/disengaging control This controls the engagement of the secondary transfer roller with the ITB to transfer toner on the ITB to the paper. The DC controller drives the secondary transfer roller engaging solenoid (SL4) when the power is turned on, a door is closed, and a print is completed.

  • Page 181: Secondary Transfer Roller Engaging/disengaging Detection

    Secondary transfer roller engaging/disengaging detection The DC controller monitors the secondary transfer roller engaging sensor (PS16) when the secondary transfer is completed. The secondary transfer roller engaging cam has the secondary transfer roller engaging flag on its shaft. When the secondary transfer roller is engaged with the ITB, this flag shields the PS16 and the SECONDARY TRANSFER ENGAGING DETECTION signal (T2SNS) is output (condition “H”), and vice versa when the roller is disengaged (condition “L”).

  • Page 182: Color Misregistration Control

    Color misregistration control This controls the correction of color misregistration caused by the variation of cartridges and the laser/scanner unit. In particular, this control corrects the following: Horizontal scan starting position Horizontal scanning scale Vertical scan starting position The DC controller operates this control after a door is closed after replacement of a cartridge, or a specified number of pages are printed after replacement of a cartridge, or a command is received from the formatter.

  • Page 183

    Figure 5-52 Color misregistration control Image formation system 169 ENWW...

  • Page 184: Color Misregistration Detection

    Color misregistration detection This printer detects the positions of each color’s misregistration detection patterns formed on the ITB to measure the misregistration. The DC controller monitors the color misregistration sensors (PS12) during the foregoing color misregistration control. There are two units of PS12 on the ITB, each having one light emitter (LED) and one light receiver (PD).

  • Page 185: Image Stabilization Control

    Image stabilization control This controls the variation of the image density caused by an environmental change or deterioration of the photosensitive drum, toner, etc. There are three kinds of controls executed as necessary. Environmental change control: The environmental condition sensor (PS15) controls the bias according to the environmental conditions.

  • Page 186: Environmental Change Control

    Environmental change control This control calibrates each bias value to obtain the best image according to the environmental changes. The environmental conditions sensor (PS15) on top of the fan detects the temperature and the humidity. The PS15 sends this information to the DC controller in the form of the TEMPERATURE DETECTION signal (TEMSNS) and the HUMIDITY DETECTION signal (HUMSNS).

  • Page 187: Image Density Detection

    The DC controller detects the density of the density detection patterns on the ITB by the image density detection and sends the data back to the formatter.(See Image density detection, below) The formatter calibrates the halftone based on such data to obtain an ideal halftone image. Image density detection The density of all four colors’...

  • Page 188: Pickup/feed System

    The DC controller notifies the formatter of each error when the following errors are found during image density detection. The initial value is reset to the new image density adjustment value when an error occurs. Image density sensor abnormality warning: No light is received at the light receivers. Image density out of guaranteed range warning: The measurement is found to be out of specified range.

  • Page 189

    Figure 5-56 Pickup/feed system Figure notes: • PS1: Tray 1 (multipurpose tray) paper sensor • PS2: Tray 2 (cassette) paper sensor • PS4: Registration paper sensor • PS5: Media sensor • PS6: Fuser front paper sensor Pickup/feed system 175 ENWW...

  • Page 190

    • PS7: Fuser delivery paper sensor • PS8: Face-down delivery unit paper sensor • PS9: Reversed paper sensor (P850HP only) • PS10: Duplexing feed delivery paper sensor (P850HP only) • M1: Feed motor • M2: Delivery motor • M3: Drum motor •...

  • Page 191: Pickup/feed Unit

    Pickup/feed unit The pickup/feed unit, being comprised of the pickup unit and feed unit, picks up paper from the Tray 2 (cassette) or Tray 1 (multipurpose tray) pickup tray one-by-one and feeds it into the printer until it reaches the fuser. Figure 5-58 diagrams the pickup/feed unit.

  • Page 192

    Figure 5-58 Pickup/delivery unit block Figure notes: • PS1: Tray 1 (multipurpose tray) paper sensor • PS2: Tray 2 (cassette) paper sensor • PS4: Registration paper sensor • PS5: Media sensor • PS6: Fuser front paper sensor • M1: Feed motor 178 Theory of operation ENWW...

  • Page 193: Feed Speed Control

    • M3: Drum motor • SL1: Tray 1 (multipurpose tray) pickup solenoid • SL2: Tray 2 (cassette) pickup solenoid • SL4: Secondary transfer roller engaging solenoid • CL1: Registration clutch Feed speed control The feed speed control changes the feed speed based on the media to prevent a fuser defect. There are four speed settings (normal, half-speed, one-third speed and one-quarter speed).

  • Page 194: Skew Control Mechanism

    normal mode. In continuous printing, the print mode remains unchanged from the one selected for the first page, unless it detects a media different from the first page, when it judges it media discrepancy. When in OTHER print modes than the above two: If a plain paper, gloss paper, or gloss film is detected;...

  • Page 195

    Figure 5-59 Skew control mechanism Pickup/feed system 181 ENWW...

  • Page 196: Media Detection

    Media detection This printer detects the media type to prevent a fuser defect. The DC controller controls the media sensor (PS5) for this detection. The PS5 has a light emitter (LED) and a light receiver (CMOS sensor). The light from the emitter is reflected off the media surface and received at the receiver.

  • Page 197: Fuser/delivery Unit

    Fuser/delivery unit The fuser/delivery unit, being comprised of the fuser and the delivery unit, feeds paper from the fuser to a delivery tray (either the face-up tray or the face-down tray). The available tray is switched as the face-up tray opens and closes. Open the face-up tray for face-up delivery, and close the tray for face-down delivery.

  • Page 198

    Figure 5-61 Fuser/delivery unit Figure notes: • PS7: fuser delivery paper sensor • PS8: Face-down delivery sensor • M1: Feed motor • M2: Delivery motor 184 Theory of operation ENWW...

  • Page 199

    Duplexing feed unit (HP 3700 printer only) The duplexing feed unit reverses the paper after one side is printed and re-feeds it to the pickup/ feed unit for printing the other side. The following is the sequence of paper feed at the duplexing feed unit.

  • Page 200

    Figure 5-62 Duplexing unit Figure notes: • PS7: fuser delivery paper sensor • PS8: Face-down delivery sensor • PS9: Reversed paper sensor • PS10: Duplexing feed paper sensor • M1: Feed motor • M2: Delivery motor • SL5: Duplexing feed solenoid 186 Theory of operation ENWW...

  • Page 201: Reverse Control

    Reverse control This control reverses a printed sheet of paper for printing on the second side. The DC controller monitors the fuser delivery paper sensor (PS7) and controls the delivery motor (M2). The following is the sequence of reversing paper. For duplex printing, the paper is fed to the face-down tray after one side is printed.

  • Page 202: Jam Detection

    Duplex feed mode The printer has the following 3 different feed modes for duplex printing. The possible feed modes depend on the print mode and paper size. 1 sheet feed: Print 1 sheet two-sided page in 1 duplex print operation. 2 sheets feed: Print 2 sheets two-sided page in 1 duplex print operation.

  • Page 203

    Fuser delay jam: When the paper does not reach the fuser delivery paper sensor (PS7) within the allotted amount of time after paper is fed from the registration roller, the CPU judges it a fuser delay jam. Fuser stationary jam: When the paper does not pass the fuser delivery paper sensor (PS7) within the allotted amount of time after paper has reached the fuser delivery paper sensor (PS7), the CPU judges it a fuser stationary jam.

  • Page 204: Paper Feeder

    Paper feeder The paper feeder is an optional unit that is installed at the bottom of the printer. It picks up and delivers a sheet of paper to the printer. Figure 5-64 illustrates the paper path. Figure 5-64 Paper feeder The paper feeder is controlled by the DC controller.

  • Page 205: Pickup/delivery Sequence

    Figure 5-65 Paper feeder PCB signal flow Pickup/delivery sequence The paper feeder is driven by the feed motor (M1) via a gear. The following is the sequence of paper pickup at the paper feeder. The printer controls the fuser heater temperature and drives the scanner motor upon receipt of a print command from the formatter.

  • Page 206: Paper Jam Detection

    Figure 5-66 Pickup/delivery sequence Paper jam detection A paper jam at the paper feeder during pickup/delivery is detected in the same way as a paper jam at the printer. See the Paper jam detection section for details. 192 Theory of operation ENWW...

  • Page 207: Introduction

    Removal and replacement Chapter contents This chapter contains the following sections. Introduction ......... . 196 Removal and replacement strategy .

  • Page 208

    (HP 3700 only) ........252...

  • Page 209

    Pick-up roller removal - 500-sheet paper feeder ..292 Separation pad removal - 500-sheet paper feeder ..293 Pick-up drive unit removal - 500-sheet paper feeder ..293 500-Sheet paper feeder sensor/solenoid/motor/PCB .

  • Page 210: Removal And Replacement Strategy, Repair Notices, Caution Regarding Electrostatic Discharge (esd)

    Introduction Removal and replacement strategy This chapter explains how to remove and replace major printer components. (HP does not support repairing individual subassemblies or troubleshooting to the component level.) Replacement is generally the reverse of removal. Occasionally, directions for difficult or critical replacement procedures are included.

  • Page 211: Types Of Screws

    Penlight (optional) Note All components in the HP Color LaserJet 3500 and 3700 series printers use Phillips-head screws that require a #2 Phillips screwdriver. Ensure that you have a Phillips screwdriver and not a Posidriv screwdriver. Figure 6-1 (below) shows the difference between a Phillips and a Posidriv screwdriver.

  • Page 212

    Table 6-1 Common fasteners Illustration Description Size Part number SCREW, TP M4X6 XA9-1450-000CN Secures metal frame panels to metal frame panels. SCREW, W/ M3X6 XA9-1477-000CN Secures the drawer, cross WASHER member, to the frame (see figure 8-8). SCREW, W/ M3X6 XA9-1461-000CN Secures motor (M2) to the WASHER, RS frame.

  • Page 213: Supplies

    HP 3700 = 50 months 1 - Approximate life is based on: 1,000 pages per month for the HP Color LaserJet 3500 series printer and 1500 pages per month for the HP Color LaserJet 3700 series printer. 2 - Approximate average A4-/letter-size page count based on approximately 5 percent coverage of individual colors.

  • Page 214: Print Cartridges And Transfer Unit

    Print cartridges and transfer unit It is recommended that you remove the print cartridges and transfer unit when servicing internal printer components. Place the print cartridges and transfer unit in a safe place while they are out of the printer. CAUTION Grasp the print cartridges by the blue handles to avoid accidentally touching the photosensitive drum inside each cartridge.

  • Page 215: Covers

    Covers The following procedures describe removal of the printers external covers. 1. Left cover 6. DIMM cover (HP3700 only) 2. Top cover 7. Right cover 3. Front door 8. Upper rear door 4. Tray 1 (multipurpose tray) 9. Rear cover 5.

  • Page 216: Front Door Removal

    Front door removal Open the front door. Remove the transfer unit and the print cartridges. See Transfer unit removal Print cartridge removal. Remove the right cover, see Right cover removal. Remove the left cover, see Left cover removal. Remove two e-clips (1) from the front door rod bracket. Remove two screws (2) from the right hinge (3).

  • Page 217: Left Cover Removal

    Lifting up slightly on the front door to relieve the pressure on the hinges, pull the hinges out and then remove the front door. Reassembly note: Each hinge is keyed and will only fit into the side from which it was removed.

  • Page 218: Left Front Cover Removal

    Left front cover removal Remove left cover. See Left cover removal. Open the front door and remove the transfer unit. See Transfer unit removal. Disconnect the control panel connector (1) and remove one screw (2). Cut the cable tie that is connected around the cable’s ferrite bead (3) and the cable harness (4).

  • Page 219

    Unhook one claw (3) from the bottom of the cover and pull out the bottom of the cover to loosen it. Reassembly note: Remember to put the switch rod back into the switch button. Figure 6-8 Left front cover removal (2 of 3) Unhook three more claws by pressing in or squeezing, at the indicated locations (1), working up from the bottom, to remove the cover (2) from the printer.

  • Page 220: Right Cover Removal

    Right cover removal Open the rear output bin and the upper rear door. Remove three screws (1). Pull down and out on the bottom edge of the cover (2) to release two claws, then pull out on the front edge (3) to release the additional claws and remove the cover (4). Figure 6-10 Right cover removal 206 Removal and replacement...

  • Page 221: Top Cover Removal, Upper Rear Door Removal

    Top cover removal Open the printer front door and remove the transfer unit. See Transfer unit removal. Remove the right cover. See Right cover removal. Remove the left cover. See Left cover removal. Remove four screws (1), unhook one claw (2), and lift the cover off the printer. Figure 6-11 Top cover removal Upper rear door removal...

  • Page 222: Rear Cover Removal

    Rear cover removal Release two claws on the right side of the rear cover by inserting a flat-blade screwdriver into each claw location (1) and twist the screwdriver to release each claw, then pull the cover out and to the right (2) to remove it. Figure 6-13 Rear cover removal 208 Removal and replacement...

  • Page 223: Tray 1 (multipurpose) Removal

    Lower rear door (rear output bin) removal Open the lower rear door. Press in on the left hinge (1) pushing towards the right to release the pin, then pull the left side of the tray out and to the left (2) to remove it. Figure 6-14 Lower rear door removal Reassembly note: Hold the tray at about a 45 degree angle when reinstalling it.

  • Page 224

    Main Assemblies The following procedures describe removal of the printer’s major internal mechanical assemblies. 1. Fuser 5. Laser/scanner assembly 2. Developing engaging drive assembly 6. Transfer unit 3. Image drive assembly 7. Face-down delivery assembly 4. Pick-up/feed assembly Figure 6-16 Main internal assemblies 210 Removal and replacement ENWW...

  • Page 225: Main Assemblies

    Transfer unit removal CAUTION Do not touch the surface (5), shown in the figure below, of the image transfer belt (ITB) since it can cause an image defect. Note If the transfer unit failed or has been replace for some reason other than reaching its end-of-life (end- of-life is indicated by a control panel message stating that the transfer unit requires replacement) then, in addition to replacing the unit, a configuration procedure must be performed.

  • Page 226: Print Cartridge Removal

    Print cartridge removal Open the front door. Grasp the blue handle (1) of a cartridge and pull it slightly upward and out to remove it. Note When performing any servicing inside the printer, all four print cartridges should be removed. Do not touch the surface of the print cartridge drum (2).

  • Page 227: Fuser Removal

    Fuser removal WARNING! Be sure to turn the power off and unplug the power cord before removing the fuser. When removing the fuser, wait ten minutes to allow it to cool before removing it. Note If the fuser failed or has been replace for some reason other than reaching its end-of-life (end-of- life is indicated by a control panel message stating that the fuser requires replacement) then, in addition to replacing it, a configuration procedure must be performed.

  • Page 228

    Face-down delivery assembly removal Remove the following covers: a. Upper rear door, see Upper rear door removal. b. Rear cover, see Rear cover removal. c. Lower rear door, see Lower rear door (rear output bin) removal. d. Right cover, see Right cover removal.

  • Page 229: Laser/scanner Assembly Removal, Image Drive Assembly Removal

    Laser/scanner assembly removal CAUTION Do not disassemble the laser/scanner assembly. It is not adjustable. Do not touch the lens on the front of the laser/scanner assembly when holding it. Remove the face-down delivery assembly. See Face-down delivery assembly removal. Remove the exhaust fan (FAN1) assembly. See High-voltage power supply PCB removal, step 9.

  • Page 230

    CAUTION Incorrect installation can result in damage to the print cartridge drive pins, the image drive assembly drive pins, and the swing guide mechanism. Disconnect one connector (2). Remove five screws (3) and remove the image drive assembly (4). Figure 6-23 Image drive assembly removal Reassembly notes: When replacing the image drive assembly ensure that the engaging pins are in the...

  • Page 231: Developing Engaging Drive Assembly Removal

    For reassembly, remove the right front top cover screw (1). If this screw is not removed it can prevent the upper left corner of the image drive assembly from seating correctly. Developing engaging drive assembly removal Remove the laser/scanner assembly. See Laser/scanner assembly removal.

  • Page 232: Pick-up/feed Assembly Removal

    Pick-up/feed assembly removal Remove the right cover. See Right cover removal. Open the front door and remove the transfer unit. See Transfer unit removal. Remove the print cartridges. See Print cartridge removal. Remove two screws (1) and disconnect the right rod bracket (2) from the front door. Figure 6-25 Pick-up/feed assembly removal (1 of 13) Remove two screws (1) and disconnect the left rod bracket (2) from the front door.

  • Page 233

    Remove two screws (1) and remove the right swing rod arm (2). Figure 6-27 Pick-up/feed assembly removal (3 of 13) Reassembly note: When installing the swing rod arm assembly, make sure the short rod is positioned as shown below (1). Figure 6-28 Right swing rod arm reassembly Main Assemblies 219...

  • Page 234

    Push the engaging rack (1) all the way back, as shown by the arrow (2), until it stops. Remove two screws (3) and remove the swing rod/lock guide (4). Figure 6-29 Pick-up/feed assembly removal (4 of 13) Reassembly notes: When reassembling the swing rod guide, the engaging rack (callout (1) below) should be positioned to the back (to the right) with respect to the printer, as shown below.

  • Page 235

    The above reassembly procedure ensures that, once the reassembly is complete, the print cartridge engaging pins are pulled back or disengaged as shown by callout (2) below. Callout (1) shows the pins extended or in the engaged position. If the engaging pins are in the wrong position (if they are engaged) the front door will not close because the print cartridge drive shaft will hang up on the engaging pins when the front door is closed.

  • Page 236

    10 Disconnect three connectors (1). 11 Remove the cable (2) from the cable holders (3). 12 Remove six screws (4) and remove the main gear plate (5). Figure 6-34 Pick-up/feed assembly removal (6 of 13) Reassembly note: If the gears come off the gear plate, reinstall them as shown in the figure below.

  • Page 237

    13 Remove gear (1) (this gear might have come off when the gear plate was removed in the previous step). (Gear (4) might also have come off during removal of the gear plate but, should be reinstalled as shown below). Reassembly note: When reinstalling the gear plate, it is easier to install the gear (1) (shown in the figure below) first, and then install the gear plate and remaining gears.

  • Page 238

    15 Disconnect one spring (1). 16 Remove two screws (2) and remove the gear unit (3). Figure 6-37 Pick-up/feed assembly removal (8 of 13) 17 Remove two screws (1). 18 Unhook one claw (2) and pull the Tray 2 pick-up gear (3) off the shaft. Reassembly note: When installing this gear (3) it may be necessary to hold pick-up feed roller steady while inserting the gear onto the shaft.

  • Page 239

    20 Lift the bushing tab (1) up slightly, rotate it in the direction of the arrow (2), and then pull both the bushing and the Tray 2 pick-up roller shaft (3) out of the printer. Reassembly note: When reinstalling the shaft (5), it should extend out approximately 17 mm (about 5/8 inch).

  • Page 240

    22 Push the right swing guide (1) all the way back. 23 Unhook two claws (2) and remove the connector cover (3). (It may be easier to unhook the upper claw from the other side of the printer frame.) 24 Release one claw (4) and remove the right swing guide rail (5). (It may be easier to unhook the claw from the other side of the frame.) Reassembly note: The swing guide rail is also secured with a screw, located on the other side of the frame, which was removed in a previous step.

  • Page 241

    27 Remove eight screws (2) and unroute the cable (3). 28 For the HP Color LaserJet 3500 series printers, remove the pick-up/feed assembly (5); for the HP Color LaserJet 3700 series printers, release the duplex pan by pulling out on the green button (4), and then remove the pick-up/feed assembly (5).

  • Page 242

    Main assembly parts The following procedures describe removal of parts located on or around the major internal mechanical assemblies. 1. Sub thermistor (TH2) 8. Tray 2 separation pad 2. Main thermistor (TH1) 9. Secondary transfer charging roller 3. Thermoswitch (TP) 10.

  • Page 243: Main Assembly Parts, Tray 1 Separation Pad Removal

    Tray 1 pick-up roller removal Remove the transfer unit. See Transfer unit removal. Unhook one claw (1) and slide the idler roller (2) in the direction of the arrow. Rotate the Tray 1 pick-up roller (3) upwards to release it from the shaft and lift the roller out. Figure 6-44 Tray 1 pick-up roller removal Note...

  • Page 244: Tray 2 Pick-up Roller Removal, Tray 2 Separation Pad Removal

    Tray 2 pick-up roller removal Remove Tray 2. Push the roller (1) in the direction of the arrow, then remove it by pulling the right side out (2) first. Figure 6-46 Tray 2 pick-up roller removal Tray 2 separation pad removal Remove Tray 2.

  • Page 245: Secondary Transfer Charging Roller Removal, Fuser Sleeve Unit Removal, Pressure Roller Removal, Main Thermistor/sub-thermistor Removal

    Secondary transfer charging roller removal Remove the transfer unit and the print cartridges. See Transfer unit removal Print cartridge removal. CAUTION When handling the secondary transfer charging roller, hold the shaft and bushing; do not hold the sponge part of the roller. Lift the blue handle (1) straight up, once the right side is out, continue lifting to release the left side and remove the roller (2).

  • Page 246: Feed Guide Unit Removal

    Feed guide unit removal Release the right and left rod brackets from the front door. See Pick-up/feed assembly removal removal procedure, steps 1 through 5. Push the swing guides all the way back. Remove the secondary transfer charging roller. See Secondary transfer charging roller removal.

  • Page 247

    Reassembly note: Make sure that the drive shaft (1) on the feed guide fits correctly into the drive shaft in the printer (2). Figure 6-51 Feed guide/printer drive shaft connection Reassembly note: Make sure that the two tabs (1) at the rear of the feed guide fit into the slots (2), located just in front of the fuser opening (viewed from the rear of the printer with the fuser removed).

  • Page 248

    Swing guide removal, right Open the front door and remove the transfer unit and the print cartridges. See Transfer unit removal Print cartridge removal. Remove the top cover. See Top cover removal. Remove the print cartridges. See Print cartridge removal. Remove two screws (1) from the right rod bracket (2) to release the bracket from the door.

  • Page 249

    Push the swing guide (1) in as far as it will go. Figure 6-55 Right swing guide removal (3 of 4) Remove one spring (1) and then pull the developing (drum) lock arm (2) off its shaft. Figure 6-56 Right swing guide removal (4 of 4) Remove the right, front swing guide rail, see Pick-up/feed assembly removal, step 24.

  • Page 250

    Pull the swing guide (1) toward you as far as it will go, move it slightly to the left (this allows it to be pulled forward a little more), and pull it forward until it stops. Now, pull the swing guide to the left to remove it.

  • Page 251

    Swing guide removal, left Remove the high-voltage power supply PCB. See High-voltage power supply PCB removal. Remove the cables (1) from the cable harness (2). Remove the screw (4) from the bracket (3), and remove the metal bracket. Figure 6-59 Left swing guide removal (1 of 6) Main assembly parts 237 ENWW...

  • Page 252

    Remove three screws (1) and swing the cable harness (2) to the right. The cable harness does not need to be completely removed to remove the transfer contact assembly. However, if the cable harness needs to be removed, disconnect the cable connector (3) from the back of the harness to remove the harness.

  • Page 253

    Remove two screws (1) and remove the left swing rod arm (2). Figure 6-62 Left swing guide removal (4 of 6) Push the left swing guide (1) in, as far as it will go (2). Figure 6-63 Left swing guide removal (5 of 6) Main assembly parts 239 ENWW...

  • Page 254

    Remove one spring (1) and remove the developing (drum) lock arm (2). Figure 6-64 Left swing guide removal (6 of 6) Remove the white left swing guide rail. See Pick-up/feed assembly removal, step 25. 10 Pull the left swing guide (1) toward the front of the printer. 240 Removal and replacement ENWW...

  • Page 255

    11 Remove the swing guide by pulling it to the right, being careful not to force it. The guide must be positioned all the way forward to release the catch on the shaft, which will allow the swing guide to be removed. Reassembly Notes: Make sure the projected part at the bottom of the swing guide is placed into the guide rail.

  • Page 256

    Switches SW1: Door switch SW1001: Test print switch SW3001: Power switch Figure 6-66 Switch locations 242 Removal and replacement ENWW...

  • Page 257: Test Print Switch (sw1001) Removal, Power Switch (sw3001) Removal

    Door Switch (SW1) removal Refer to the left swing guide removal procedure, steps 1 through 5, and remove the transfer contact assembly. See Swing guide removal, left. Remove the door switch (1) by sliding it out. Figure 6-67 Door switch removal Test print switch (SW1001) removal Replacing the test print switch requires the replacement of the DC controller PCB.

  • Page 258

    Sensors PS1: Tray 1 (multipurpose) paper sensor PS10: Duplexing feed delivery paper sensor PS2: Tray 2 (cassette) paper sensor PS11: Face-up tray sensor PS4: Registration paper sensor PS12: Color misregistration sensor PS5: Media sensor PS13: Waste toner level sensor PS6: Fuser front paper sensor PS14: Developing engaging sensor...

  • Page 259: Tray 2 (cassette) Paper Sensor (ps2) Removal

    Tray 1 (multipurpose tray) paper sensor (PS1) removal Replacement of the Tray 1 paper sensor requires replacement of the entire pick-up/feed assembly. Pick-up/feed assembly removal. Tray 2 (cassette) paper sensor (PS2) removal Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. Turn the pick-up/feed assembly over.

  • Page 260

    Unhook the bushing claw (1) by pushing it in, then rotate it in the direction of the arrow (2), and remove both the bushing (3) and black sensor arm (4). Figure 6-70 Tray 2 paper sensor removal (2 of 3) Reassembly note: Make sure that the flag on the sensor arm (4 - in the above figure) fits between the notch in the paper sensor (5 - in the above figure) and moves freely.

  • Page 261

    Registration paper sensor (PS4) removal Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. Remove one screw (1) and remove the registration paper sensor holder (2). Figure 6-72 Registration paper sensor removal (1 of 2) Unhook two claws (1), disconnect one connector (2), and remove the registration paper sensor (3) from the sensor holder.

  • Page 262

    Media sensor (PS5) removal Note When the media sensor is replaced, in addition to replacing the sensor, a configuration procedure must be performed. For information on this configuration, refer to Chapter 8, Replacement parts configuration. Remove the color misregistration sensor. See Color misregistration sensor (PS12) removal.

  • Page 263: Fuser Front Paper Sensor (ps6) Removal, Fuser Delivery Paper Sensor (ps7) Removal

    Fuser front paper sensor (PS6) removal Remove the feed guide unit. See Feed guide unit removal. Disconnect one connector (1), unhook two claws (2), and remove the sensor (3). Figure 6-75 Fuser front paper sensor (PS6) removal Fuser delivery paper sensor (PS7) removal Remove the fuser.

  • Page 264: Face-down Delivery Paper Sensor (ps8) Removal

    Disconnect one connector (1), unhook two claws (2), and remove the fuser delivery paper sensor (3). Figure 6-77 Fuser delivery paper sensor removal (2 of 2) Face-down delivery paper sensor (PS8) removal Remove the face-down (output bin) delivery assembly. See Face-down delivery assembly removal.

  • Page 265

    Reversed paper sensor (PS9) removal (HP3700 only) Remove the fuser. See Fuser removal. Remove two screws (1) and remove the reverse guide unit (2). Loosen the right printer Tray 2 guide. See Cassette (Tray 2) guide, right, removal (HP3500). Figure 6-79 Reversed paper sensor removal (1 of 2) Remove one connector (1), unhook two claws (2), and remove the sensor (3).

  • Page 266: Rear Output Bin Paper Sensor (ps11) Removal, Hp 3700 Only

    Duplex feed delivery paper sensor (PS10) removal (HP 3700 only) Remove the feed guide. See Feed guide unit removal. Disconnect one connector (1) and remove the cables from the cable guide. Lift up on the claw (2), slide the cable guide/sensor holder assembly back (3), then lift it up to release it.

  • Page 267

    Color misregistration sensor (PS12) removal Note When the color misregistration sensor is replaced, in addition to replacing the sensor, a configuration procedure must be performed. For information on this configuration, refer to Chapter 8, Replacement parts configuration. Refer to the pick-up/feed unit removal procedure, steps 1 through 5, and release the right and left slide rods from the front door.

  • Page 268: Developing Engaging Sensor (ps14) Removal

    Waste toner level sensor (PS13) removal Remove the front left cover. See Left front cover removal. Remove one connector (1) from the DC controller PCB and unroute the cable. Remove one screw (2) and remove the waste toner level sensor (3). Figure 6-84 Waste toner level sensor removal Developing engaging sensor (PS14) removal...

  • Page 269: Secondary Transfer Roller Engaging Sensor (ps16) Removal

    Environment sensor (PS15) removal Remove the left cover. See Left cover removal. Remove one (1) screw and remove the sensor (2). Disconnect the connector (3) while removing the sensor. Figure 6-86 Environmental sensor removal Secondary transfer roller engaging sensor (PS16) removal Remove the pick-up/feed assembly.

  • Page 270

    Solenoids and Clutches SL1: Tray 1 pick-up solenoid SL2: Tray 2 pick-up solenoid (pick-up/feed assembly) SL3: Tray 3 pick-up solenoid (not shown; see 500-sheet paper feeder) SL4: Secondary transfer roller engaging solenoid SL5: Duplex feed solenoid CL1: Registration clutch CL2: K development clutch (image drive unit) CL3: Developing engaging clutch (developing engaging drive unit)

  • Page 271: Solenoids And Clutches, Tray 2 Pick-up Solenoid (sl2) Removal

    Tray 1 (multipurpose tray) pick-up solenoid (SL1) removal Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. Remove one screw (1), disconnect one connector (2), and remove the Tray 1 pick-up solenoid (3). Figure 6-89 Tray 1 pick-up solenoid removal Tray 2 pick-up solenoid (SL2) removal Remove the right cover.

  • Page 272: Secondary Transfer Roller Engaging Solenoid (sl4) Removal

    Remove one screw (1) and remove the solenoid (2). Figure 6-91 Tray 2 pick-up solenoid removal (2 of 2) Secondary transfer roller engaging solenoid (SL4) removal Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. Remove five screws (1), the gear side plate (2), plate (3), solenoid (4), and the connector cover (5).

  • Page 273: Duplex Feed Solenoid (sl5) Removal (hp3700 Only)

    Disconnect one connector (1), remove one screw (2), and remove the secondary transfer roller engaging solenoid (3). Figure 6-93 Secondary transfer roller engaging solenoid removal (2 of 2) Duplex feed solenoid (SL5) removal (HP3700 only) Remove the right 250-sheet tray guide. See Cassette (Tray 2) guide, right, removal (HP3700).

  • Page 274

    Registration clutch (CL1) removal Remove the right cover. See Right cover removal. Disconnect one connector (1), remove two screws (2), and remove the plate (3). Figure 6-95 Registration clutch removal (1 of 2) Remove the bushing (1) and remove the registration clutch (2). The bushing needs to be used for the replacement clutch.

  • Page 275: Developing Engaging Drive Clutch (cl3) Removal

    Black (K) development clutch (CL2 - image drive) removal Remove the image drive unit. See Image drive assembly removal. Disconnect one connector (1), remove the e-clip (2), and remove the black development clutch (3). Figure 6-97 Black development clutch removal (2 of 2) Developing engaging drive clutch (CL3) removal Remove the developing engaging drive assembly.

  • Page 276

    Motor and fans Feed motor Delivery motor Drum motor Developing motor Primary transfer roller engaging motor FAN1: Exhaust fan Figure 6-99 Motor and fan locations 262 Removal and replacement ENWW...

  • Page 277

    Feed motor (M1) removal Remove the right swing guide. See Swing guide removal, right. Remove the feed guide. See Feed guide unit removal. Press down on the motor cover claw (1) and lift up on the cover (2) to remove it. If possible, release the cover claw (1) from the other side of the frame.

  • Page 278: Delivery Motor (m2) Removal

    Remove two screws (1) and remove the feed motor (2). Figure 6-102 Feed motor removal (3 of 3) Delivery motor (M2) removal Remove the right cover. See Right cover removal. Remove one connector (1). Remove two screws (2) and remove the delivery motor (3). Figure 6-103 Delivery motor removal 264 Removal and replacement...

  • Page 279

    Drum motor (M3) removal Remove the image drive assembly. See Image drive assembly removal. Remove five screws (1), remove the gear plate (2), and remove two gears (3). Figure 6-104 Drum motor removal (1 of 3) Remove the face-down delivery assembly. See Face-down delivery assembly removal.

  • Page 280: Developing Motor (m4) Removal

    Remove four screws (1) and remove the drum motor (see callout (4) in the previous figure). Figure 6-106 Drum motor removal (3 of 3) Developing motor (M4) removal Remove the image drive assembly. See Image drive assembly removal. Remove the face-down delivery assembly. See Face-down delivery assembly removal.

  • Page 281

    Remove four screws (1). Figure 6-108 Developing motor removal (2 of 3) Disconnect one connector (1) and remove the developing motor (2). Figure 6-109 Developing motor removal (3 of 3) Motor and fans 267 ENWW...

  • Page 282

    Primary transfer roller engaging motor (M5) removal Remove the image drive assembly. See Image drive assembly removal. CAUTION It is important to refer to the image driver assembly removal procedure’s "Reinstallation notes" to ensure correct installation of this assembly. If reassembly is not performed correctly, it can result in damage to the print cartridge drive pins, the image drive assembly drive pins, and the swing guide mechanism.

  • Page 283

    Remove the one screw (1) from the rear swing guide rail (2) and remove the rail. Pull gear (3) and its shaft out to the left. Remove the motor cover (4) by pressing down on the tab (5) while pulling the cover slightly to the left and up, then pull it and out to remove it.

  • Page 284: Exhaust Fan (fan1) Removal

    Disconnect one connector (1) and lift the primary transfer roller engaging motor (2) up slightly, and then pull it to the left to remove it. Figure 6-113 Transfer roller engaging motor (4 of 4) Exhaust fan (FAN1) removal Remove the left cover. See Left cover removal.

  • Page 285: Circuit Boards

    Circuit Boards 1. DC controller PCB 4. Low-voltage power supply PCB 2. Memory controller PCB 5. Formatter PCB 3. High-voltage power supply PCBs 6. Control panel PCB Figure 6-115 Circuit board locations Circuit Boards 271 ENWW...

  • Page 286: Dc Controller Pcb Removal

    Remove the left cover. See Left cover removal. Disconnect all cable connections (19 connectors for the HP Color LaserJet 3500 series printer and 20 connectors for the HP Color LaserJet 3700 series printer). Remove four screws (1) and remove the PCB (2).

  • Page 287

    Formatter PCB removal The HP Color LaserJet 3500 series printer and the HP Color LaserJet 3700 series printer have different formatter PCBs and formatter enclosures. The removal procedure for the PCB is different as described below. Note When the formatter PCB is replaced, in addition to replacing the PCB, a configuration procedure must be performed.

  • Page 288

    b. Remove seven screws (1) and remove the formatter PCB (2). Figure 6-118 Formatter PCB (HP3500) removal (2 of 2) c. Remove the network interface card (if installed). d. Disconnect one connector (1), remove two screws (2), and remove the formatter cover (3). Figure 6-119 Formatter PCB (HP3700) removal (1 of 2) 274 Removal and replacement...

  • Page 289

    Disconnect one connector (1), remove six screws (2), and remove the formatter PCB (3). Figure 6-120 Formatter PCB (HP 3700) removal (2 of 2) Circuit Boards 275 ENWW...

  • Page 290

    Disconnect two cables (1). (The formatter cage removal for the HP Color LaserJet 3500 and 3700 series printers is slightly different. (Refer to the figure below, either HP 3500 or the HP 3700 for the specific printer formatter cage being removed.) Remove four screws (2) from the side of the cage.

  • Page 291

    Remove the screws from the back of the formatter cage (the HP 3500 is shown for both the HP 3500 and HP 3700; remove two screws (1) for the HP 3500; remove three screws, (1) and (2), for the HP3700).

  • Page 292

    10 Disconnect the remaining cable connectors from the PCB (19 connectors for the HP 3500 and 20 for the HP 3700) and remove the cables from three cable clamps (1). 11 Remove four screws (2) and remove the DC controller PCB/plate (3) from the printer. While removing the controller PCB/plate, remove the cables from the remaining harness clamps.

  • Page 293: Formatter Pcb Removal

    Low-voltage power supply PCB removal Remove the formatter. See Formatter PCB removal. Remove two screws (1). Pull the low-voltage power supply PCB toward you about two inches. Disconnect the switch rod (2) from the power switch on the PCB as you pull it out. Reassembly note: Remember to put the switch rod back into the power switch when reassembling the power supply unit.

  • Page 294: Memory Controller Pcb Removal

    Disconnect four connectors (1) and remove the power supply (2). Figure 6-128 Low voltage power supply PCB removal (2 of 2) Memory controller PCB removal Open the front door, remove the transfer unit, and the print cartridges. See Transfer unit removal Print cartridge removal.

  • Page 295: Control Panel Pcb Removal

    Release one claw (1) at the top of the PCB (2) and swing the right side of the PCB out (3) then pull it to the right to free it from the retainer tab (4) and support tab (5). Disconnect the cable (6) at the top as you remove the PCB.

  • Page 296: Swing Guide Removal, Left, Swing Rod Guide, Left Removal, Swing Rod/lock Guide, Right Removal

    Miscellaneous parts Swing rod guide, left removal Remove the left swing guide. See Swing guide removal, left. Remove the ground (1) wire from the guide. Use needle-nose pliers to pull the ground wire out of the contact (2). Reassembly note: Remember to reconnect the ground wire to the contact (2). Use needle nose pliers to insert the wire back into the clip.

  • Page 297: Miscellaneous Parts

    Developing contact assembly Remove the high-voltage power supply PCB. See High-voltage power supply PCB removal. Remove three springs (1) from inside, located under the left swing guide. (The left swing guide is not shown for illustration purposes only.) Remove these springs carefully; they are delicate and can be easily damaged.

  • Page 298

    Unhook the cables from the left side cable guides (1) on the contact assembly. Pull out on the top of the assembly while pressing in on two tabs (2). Once the top is released, pull up slightly and outward to remove the developing contact assembly (3). As you remove the assembly, unroute the grounding wire (4).

  • Page 299: Lower Rear Door (rear Output Bin) Removal, Tray 2 (cassette)

    Chapter 8, parts, for the location of the end plate. Cassette (Tray 2) guide, right, removal The removal of the right guide is different for the HP Color LaserJet 3500 and 3700 series printers. These procedures are provided below.

  • Page 300

    Remove eight screws (1) from the printer’s bottom plate (2) and remove the plate. Figure 6-136 Right Tray 2 guide removal (2 of 6) Release the duplex guide pan by lifting up on the release lever (1), then swing the pan (2) down.

  • Page 301

    10 Lower the duplex guide pan (1) until it is perpendicular with the base of the printer and pull it straight out (2) to remove it. Reassembly note: Ensure that the grounding spring (3) on the left side is connected to the contact (4).

  • Page 302

    12 Remove two screws (1) and remove the tray guide (2). Figure 6-140 Right tray guide removal (6 of 6) Cassette (Tray 2) guide, right, removal (HP3500) Remove Tray 2. Remove two screws (1) and remove the duplex guide (2) from the back of the printer. Figure 6-141 Right Tray 2 guide removal (1 of 3) Turn the printer on its back.

  • Page 303

    Remove eight screws (1) from the bottom plate (2) and remove the plate. Figure 6-142 Right Tray 2 guide removal (2 of 3) Remove two screws (1) from the right tray guide and remove the guide (2). Figure 6-143 Right Tray 2 guide removal (3 of 3) Tray 2 (cassette) parts removal 289 ENWW...

  • Page 304: Front Cover Removal - 500-sheet Paper Feeder

    500-Sheet paper feeder (Tray 3) covers This section describes the removal and replacement procedures for the 500-sheet paper feeder covers. 1. Right cover 2. Left cover 3. Front cover Figure 6-144 500-Sheet feeder cover locations Front cover removal - 500-sheet paper feeder Remove Tray 3.

  • Page 305: Sheet Paper Feeder (tray 3) Covers, Left Cover Removal - 500-sheet Paper Feeder

    Right cover removal - 500-sheet paper feeder Remove Tray 3. Lift up to release two pins (1) and pull the top edge of the cover (2) in the direction of the arrow to remove the cover (3). Figure 6-146 500-sheet paper feeder right cover removal Left cover removal - 500-sheet paper feeder Remove Tray 3.

  • Page 306: Pick-up Roller Removal - 500-sheet Paper Feeder

    500-Sheet paper feeder internal parts 1. 500-Sheet paper feeder pick-up roller 2. 500-Sheet paper feeder pick-up drive unit 3. 500-Sheet paper feeder separation pad Pick-up roller removal - 500-sheet paper feeder Remove Tray 3. Turn the 500-sheet paper feeder over. Move the left side of the roller unit (1) to the left (2), then pull it out and to the right (3).

  • Page 307: Sheet Paper Feeder Internal Parts, Pick-up Drive Unit Removal - 500-sheet Paper Feeder

    Separation pad removal - 500-sheet paper feeder Remove Tray 3. Push the lifting plate (1) down. Unhook the two claws (2) and remove the separation pad (3). Figure 6-149 500-sheet paper feeder separation pad removal Pick-up drive unit removal - 500-sheet paper feeder Remove the right cover.

  • Page 308: Sheet Paper Feeder Sensor/solenoid/motor/pcb

    500-Sheet paper feeder sensor/solenoid/motor/PCB 500-Sheet paper feeder PCB 500-Sheet paper feeder pick-up clutch (CL4) 500-Sheet paper feeder pick-up solenoid (SL3) 500-Sheet paper sensor (PS3) Figure 6-151 500-Sheet paper feeder sensor/solenoid/motor/PCB locations 294 Removal and replacement ENWW...

  • Page 309: Right Cover Removal - 500-sheet Paper Feeder, Pick-up Clutch (cl4) Removal - 500-sheet Feeder

    500-Sheet paper feeder PCB removal - 500-sheet feeder Remove the right cover. See Right cover removal - 500-sheet paper feeder. Disconnect four connectors (1), remove one screw (2), and remove the 500-sheet feeder PCB (3). Figure 6-152 500-Sheet paper feeder PCB removal Pick-up clutch (CL4) removal - 500-sheet feeder Remove the right cover.

  • Page 310: Paper Sensor (ps3) Removal - 500-sheet Feeder

    Pick-up solenoid (SL3) removal - 500-sheet feeder Remove Tray 3. Remove the right cover. See Right cover removal - 500-sheet paper feeder. Disconnect one connector (1), remove two screws (2), and remove the solenoid plate (3). Figure 6-154 500-Sheet paper feeder pick-up solenoid removal Remove the one screw to remove the pick-up solenoid from the plate.

  • Page 311

    Press in on one claw by inserting a flat-blade screwdriver into the slot (1), at the same time, pry up at slot (2) to release the cover (3), then swing the left side of the cover out to remove it. Figure 6-156 500-Sheet feeder paper sensor removal (2 of 3) Disconnect one connector (1), unhook two claws (2), and remove the paper sensor (3).

  • Page 312

    298 Removal and replacement ENWW...

  • Page 313

    Troubleshooting Chapter contents This chapter contains the following sections. Introduction ......... . 302 Troubleshooting process .

  • Page 314: Color Options (available For The)

    HP toolbox ........

  • Page 315

    Calibration bypass ....... . . 435 Calibrate Now ........435 Service menu .

  • Page 316

    Introduction This troubleshooting chapter assumes the reader has a basic understanding of the color laser printing process. Explanations of each mechanical assembly, printer system, and the basic theory of operation are found in Chapter 5. Do not perform any of these troubleshooting processes without fully understanding the function of each mechanism.

  • Page 317: Troubleshooting Process

    Troubleshooting process When the printer malfunctions or encounters an unexpected situation, the printer control panel alerts you of the situation. This section contains a pre-troubleshooting checklist to filter out many possible causes of the problem. A troubleshooting flowchart helps you diagnose the root cause of the problem.

  • Page 318: Pre-troubleshooting Checklist

    If so, allow the print cartridge to sit at room temperature for one to two hours. Miscellaneous Check for and remove any non-HP components (print cartridges, memory modules, and EIO cards) from the printer. If hardware or software configuration has not changed or the problem is not associated with any specific software, contact the Customer Care Center (see Chapter 1).

  • Page 319: Troubleshooting Flowchart

    Troubleshooting flowchart The flowchart on these two pages highlights the general processes to quickly isolate and solve printer hardware problems. Each heading depicts a major troubleshooting step. A “yes” answer to the questions allows you to proceed to the next major step. A “no”...

  • Page 320

    Troubleshooting flowchart (continued) 306 Troubleshooting ENWW...

  • Page 321

    Verify that the on/off switch is in the ON position. Make sure the fan is running, indicating the system is operational. Verify that the firmware DIMM (HP 3700 only) and the formatter are seated and operating properly. Remove any HP Jetdirect or other devices, then try to turn the printer on again.

  • Page 322: Status Messages, Warning Messages, Error Messages, Critical Error Messages

    Printer error troubleshooting The following tables explain messages that might appear on the printer control panel. Alphabetical printer messages and their meanings are listed in the Alphabetical printer messages table, and numerical printer messages are listed in the Numerical printer messages table.

  • Page 323: Media Weight

    CANNOT DUPLEX CHECK PAPER paper size that could not go through the auto-duplexer. CANNOT DUPLEX CLOSE REAR BIN HP 3700dn and 3700dtn only. 1. Close the lower rear door (rear output bin). A 2-sided print job has been sent to the printer while the lower rear door (rear 2.

  • Page 324

    The printer will back up one screen to Service Menu upon completion of printing the page. Clearing paper path HP 3700 only. No action necessary. The printer detected jammed or misplaced paper when turned on and is attempting to eject jammed pages.

  • Page 325

    To clear press a problem with the software application. FLASH FILE HP 3700 only. 1. Use HP Web Jetadmin software to delete SYSTEM IS FULL The printer received a PJL file system files from the Flash Memory and try again.

  • Page 326

    ] DEVICE can be either: To clear press [FS FLASH] DEVICE or [FS RAM DISK] DEVICE Genuine HP A new HP cartridge has been installed. No action necessary. supplies installed The printer returns to the Ready state after approximately 10 seconds.

  • Page 327

    At least one supply item is missing or is Press and then press for help. For status press not correctly seated in the printer and http://www.hp.com/support/ another supply item is missing, Refer to clj3500 http://www.hp.com/support/ incorrectly placed, out, or low. Insert...

  • Page 328

    No other tray is available. alternates with For help press Loading HP 3700 only. No action necessary. program X Programs and fonts can be stored on the printer file system and are loaded alternates with into RAM when the printer is turned on.

  • Page 329

    READY state. NON HP SUPPLY Not made by HP. This message is If you believe you purchased an HP supply, DETECTED displayed until an HP supply is please call the HP fraud hotline at 1-877- installed or is pressed.

  • Page 330

    Table 7-2 Alphabetical printer messages (continued) Message Description Action ORDER <COLOR> The identified print cartridge is nearing Order the identified print cartridge. Printing will continue until REPLACE <COLOR> CARTRIDGE the end of its useful life. The printer is CARTRIDGE is shown. ready and will continue for the alternates with estimated number of pages indicated.

  • Page 331

    EVENT LOG page. The printer will return to the online Ready state when the page is completed. Printing... HP 3700 only. No action necessary. FILE DIRECTORY The printer is generating the mass storage directory page. The printer will return to the Ready state when the page is completed.

  • Page 332

    SUPPLIES STATUS status page. The printer will return to the online Ready state when the page is completed. Printing... HP 3700 only. No action necessary. USAGE PAGE The printer is generating the usage page. The printer will return to the online Ready state when the page is completed.

  • Page 333

    Message Description Action RAM DISK FILE HP 3700 only. 1. Use HP Web Jetadmin software to delete SYSTEM IS FULL The printer received a PJL file system files from the RAM disk memory and try command that attempted to store again.

  • Page 334

    Table 7-2 Alphabetical printer messages (continued) Message Description Action REPLACE <COLOR> The identified print cartridge has Press for help. CARTRIDGE reached the end of life. Printing will not continue until the cartridge is replaced. Transfer unit removal (in chapter 6) and alternates with Ordering parts (in chapter 8) for more...

  • Page 335

    Resend The firmware upgrade was not Attempt upgrade again. For the HP 3700 upgrade completed successfully. printer, you might need to use the parallel port to send the upgrade file.

  • Page 336

    Table 7-2 Alphabetical printer messages (continued) Message Description Action Rotating motor The printer is executing a Component Press Stop when ready to stop this test. Test and the component selected is Rotating <COLOR>. alternates with To exit press Stop Setting saved A menu selection has been saved.

  • Page 337

    Table 7-2 Alphabetical printer messages (continued) Message Description Action TRAY X The specified tray is open or is empty 1. If the tray has paper or is closed and the OPEN OR EMPTY and needs to be filled. If the tray is not paper guides are in the correct position, open or has paper installed, a problem perform the following action for the specified...

  • Page 338

    Table 7-2 Alphabetical printer messages (continued) Message Description Action UNAUTHORIZED SUPPLY The printer has detected that a non-HP If you believe you purchased an HP supply, IN USE supply is currently installed and press please call the HP fraud hotline at (override) was pressed. 1-877-219-3183.

  • Page 339: Numerical Printer Messages

    7. Defective DC controller PCB, replace the DC controller PCB 10.32.00 A new supply has been installed that is If you believe you purchased an HP supply, UNAUTHORIZED SUPPLY not made by HP. This message is please call the HP fraud hotline at displayed until an HP supply is 1-877-219-3183.

  • Page 340

    REMOVE INCOMPATIBLE CAUTION: Use only transparencies specified TRANSPARENCIES for use with HP Color LaserJet printers. Noncompatible transparencies can damage the printer. See the HP LaserJet Printer Family Print Media Specification Guide. 1. Remove all non-compatible transparencies from Tray 1.

  • Page 341

    To continue press 3. HP 3700 only - Add additional memory to allow printing of more complex pages. 4. HP 3500 only - on the printer driver, set Raster Compression on the Advanced tab to Maximum. 22 EIO X HP 3700 only when an EIO device is 1.

  • Page 342

    To continue press was receiving data. 40 EIO X BAD HP 3700 only when an EIO device is Press to continue printing. Note: TRANSMISSION installed. A loss of data will occur.

  • Page 343

    Table 7-3 Numerical printer messages (continued) Description Action Message 41.X A printer error has occurred. 1. Press to continue or press for more PRINTER ERROR information. X Description: alternates with 2 - Beam detect misprint error. 2. If the message persists after exiting help, 3 - Media feed error (size) turn the printer off and then back on.

  • Page 344

    8. For the HP 3700, remove the EIO card from the printer. 9. Turn the printer on. 10. HP 3700 only - If the error no longer exists, install each DIMM and EIO device one at a time, making sure to turn the printer off and back on as you install each device.

  • Page 345

    Table 7-3 Numerical printer messages (continued) Description Action Message 50.X FUSER ERROR A fuser error has occurred. WARNING: The fuser is HOT. Turn the printer off and allow it to cool for X Description alternates with approximately 10 minutes before removing 1 - low fuser temperature the fuser.

  • Page 346

    Table 7-3 Numerical printer messages (continued) Description Action Message Continued 50.3 error - Fuser Failure (Abnormally High 50.X FUSER ERROR Temperature Main Thermistor) 1. The connector between the fuser and the printer is not connected properly. Reseat the fuser. Check the connector J5013 between the fuser and the printer.

  • Page 347

    Table 7-3 Numerical printer messages (continued) Description Action Message Continued Short in the sub thermistor. 50.X FUSER ERROR Turn the printer off and remove the fuser. Measure the resistance between the fuser connectors J5013LA-4 (SUBTH) and J5013LA-3 (+3.3V). If it reads 600 ohms or below (at ambient temperature), replace the fuser.

  • Page 348

    53.10.03 HP 3500 & HP 3700 53.10.03 Memory error HP 3500 - Replace the formatter. HP 3700 - Perform the following steps: 1. Try the firmware DIMM in slot 1 in another printer. 2. Replace the formatter PCB. 334 Troubleshooting...

  • Page 349

    Table 7-3 Numerical printer messages (continued) Description Action Message 54.XX PRINTER A printer command error has occurred. 1. Turn the printer off and then back on. ERROR Note: Some messages are displayed 2. For the specific error messages, perform in the event log and some are the indicated action: displayed on both the control panel 54.01 - Environment Sensor Abnormality...

  • Page 350

    Table 7-3 Numerical printer messages (continued) Description Action Message continued 54.21 - 54.XX PRINTER 54.22 - ERROR 54.23 - 54.24 - Toner (Y/M/C/K) level sensor abnormality 1. The connectors in the toner level sensor control line are not connected properly. Reseat the memory controller PCB connector J201 and the DC controller PCB connector J1025.

  • Page 351

    55.01.00 - DC controller memory error. the DC controller and the formatter. 55.5 - HP 3700 only - A job was sent 4. If the problem persists, replace the DC while Resend Upgrade is on the controller PCB.

  • Page 352

    Replace the motor. 3. Faulty DC controller PCB. Replace the DC controller PCB. 59.7Y Control Panel Message 59.07.00 - (HP 3700 only; event log only) 59.07.ZZ - (HP 3500 only; event log only) ZZ is color: 00 - Black...

  • Page 353

    Table 7-3 Numerical printer messages (continued) Description Action Message continued 59.90 and 59.A0 Errors on control panel 59.XY 59.09.00 (event log only) PRINTER ERROR 59.10.00 (event log only) alternates with An error occurred when the drum motor started or while the drum motor was rotating. To continue turn off then on 1.

  • Page 354

    No system was found. 1. Turn the printer off and then back on. 2. HP 3700 only - reseat the firmware DIMM. Make sure it is in slot 1 (the bottom slot). 3. Download new firmware (HP 3700 - try downloading through the parallel port).

  • Page 355

    0 - for onboard NVRAM the error persists, execute an NVRAM 1 - for removable flash disk initialization. 68.1 - use the HP Web Jetadmin software to delete files from the flash disk. 68.X PERMANENT A non-volatile storage device is failing Press to continue.

  • Page 356: Formatter And Dc Controller Replaced At The Same Time

    DC Controller are replaced at the same time. This file will only work in the current printer. Call for assistance from HP Support to obtain the PJL file. Also, perform the Formatter and DC Controller replacement steps as required below.

  • Page 357: Replacement Parts Configuration

    Formatter (previously installed in another printer) replacement configuration When the formatter PCB is being replaced with one that was installed in another printer, an NVRAM initialization will need to be performed. Before doing an NVRAM INIT, print a configuration page and a supplies status page in the INFORMATION menu to obtain the page counts, counts for any of the supplies, serial number, and the born-on date.

  • Page 358: Replacement Configuration

    Note For the HP Color LaserJet 3700 series printer, a non-duplexing printer can obtain the ability to duplex if the DC Controller was previously installed in a 3700 printer that had duplexing.

  • Page 359: Fuser Replacement Configuration

    Color Misregistration Sensor (PS12) replacement configuration To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW. Laser/scanner Assembly replacement configuration To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW.

  • Page 360: Paper Path Jam Areas

    For instructions on clearing jams, see the following sections in this chapter. Area 1: Tray 1 pick-up area Area 4: transfer/feed area Area 2: Tray 2 pick-up/feed area Area 5: duplex feed area (HP 3700 only) Area 3: Tray 3 pick-up area Area 6: fuser/face-down delivery area PS1:...

  • Page 361

    Use the following table to help pinpoint and clear specific paper jams and refer to Figure 7-1, “Jam area locations and sensor positions,” for jam location areas in the printer. To identify the specific Jam location code for the HP Color LaserJet 3700 series printer, display the event log entries on the control panel.

  • Page 362

    Event log Action Location/Action code Go to jam Location areas: 13.20.00 (HP 3700 only) 13.11.00 When the paper does not pass through 5- duplex feed area Duplexing feed stationary the sensor t within time T since a paper 6- fuser/face-down delivery...

  • Page 363: Multiple Pages Are Fed

    Paper path areas jam troubleshooting Paper jam troubleshooting information is provided in this section for the six paper areas identified in Figure 7-1, “Jam area locations and sensor positions,”in this chapter. Multiple pages are fed Table 7-5 Causes for multiple pages feeding Cause Solution Tray 1 (multipurpose tray) separation pad is worn.

  • Page 364: Jam Troubleshooting

    Area 2: Tray 2 jam troubleshooting Removing paper jams located in the Tray 2 (cassette) area requires removing the paper tray then removing any paper stuck in the tray input area. Check the area inside the tray opening to ensure that all paper has been removed.

  • Page 365

    Area 4: transfer/feed area jam troubleshooting Table 7-9 Transfer/feed area Cause Solution If the jam has occurred around a feed roller If dirty, clean the rollers. If worn or deformed, replace the pick- indicates a dirty, worn, deformed registration up/feed assembly roller or registration sub roller.

  • Page 366

    Front door area jams (area 4) Open the front door. CAUTION Do not place anything on the transfer unit. Do not touch the top of the transfer unit or the contacts on the left side of the transfer unit. Remove the magenta and yellow print cartridges. If necessary, turn the green roller wheel toward the rear of the printer to advance the paper.

  • Page 367

    Registration/transfer area jams (area 4) Lift the latch (1) on the printer front door and open the door (2). Figure 7-2 Printer front door CAUTION Do not place anything on the surface of the transfer unit. Also, do not touch the transfer unit contacts located on the left side of the unit. Remove the transfer unit (1) by grabbing the blue handles (2) on both sides of the transfer unit.

  • Page 368

    Remove the yellow and magenta cartridges (1) from the printer by grabbing the blue handle (2) on the cartridge and pulling it upward and out. Close the front door approximately half-way, matching the arrow on the right door bracket (1) with the arrow on the inside of the printer (2).

  • Page 369

    Remove any visible paper from inside the printer’s transfer area. Locate the top flat bar (1) and pull up on the white tab marked with black dots (2) to raise the bar to a vertical position (3). The bar will remain vertical. Note: Do not touch the registration sensor lenses (4).

  • Page 370

    While holding the media sensor bar upright, remove any visible pieces of paper (1). When the paper is removed, lower the bottom media sensor bar back down into place. 10 Swing the top flat bar down into place over the bottom media sensor bar. 11 Open the front door to its fully open position and reinstall the yellow and magenta cartridges.

  • Page 371

    Paper is wrinkled or folded To diagnose the cause of wrinkled or folded paper, use the Print/Stop Test in the Diagnostics test menu. Adjust the stop time so the paper stops before it enters the fuser. Open the front door. If paper is wrinkled at this stage, use Table 7-10,...

  • Page 372

    If the registration shutter is damaged, replace the pickup/ feed assembly. Area 5: Duplex jam troubleshooting Table 7-13 Causes for jams in the duplex area (HP 3700 only) Cause Solution Scratched/Dented duplex feed guide.

  • Page 373

    Duplex jam area removal (area 5) Note This message appears for HP Color LaserJet 3700dn and 3700dtn printer models only. The printer control panel displays the message 13.XX.YY JAM REMOVE TRAY 2. Remove Tray 2. Remove any paper in the top of the tray opening.

  • Page 374

    Press the metal access plate (duplex pan) up until it locks in place. Replace Tray 2. Press to resume printing Area 6: Fuser/face-down delivery jam troubleshooting Table 7-14 Fuser/face-down delivery area Cause Solution If the jam has occurred around the fuser Reseat the fuser delivery sensor lever if it does not move area, a defective fuser delivery sensor is smoothly or it is out of position.

  • Page 375

    Upper rear door area jams (area 6) The message 13.XX.YY JAM INSIDE UPPER REAR DOOR can appear on the printer control panel if the upper rear door is open. Make sure the upper rear door is closed when printing. Remove any paper visible in the top output bin. Open the upper rear door.

  • Page 376

    Press down on the green levers and remove any paper. Return the green levers to the up position after removing the page. Close the lower rear door. Fuser area jams (area 6) Open the lower rear door (rear output bin). 362 Troubleshooting ENWW...

  • Page 377

    Note Make sure the green pressure levers are not in the down position. If the green pressure levers are down, they can cause a jam message to display on the printer control panel. If the paper is visible, press down on the green levers and remove the paper. Return the green levers to the up position after removing the paper, and close the lower rear door (rear output bin).

  • Page 378

    WARNING! The fuser is hot! Wait ten minutes after turning the printer off before removing the fuser. Place your thumbs on the blue ridges (near the warning label), and using your fingers, pull up on the blue latches. Pull the fuser out of the printer. On the fuser, squeeze and lift the black tabs to open the shutter door.

  • Page 379

    10 Hold the fuser with your thumbs on the blue ridges and your fingers on the blue latches. Push both sides of the fuser into the printer. 11 Press the black ridges on the front of the fuser until the fuser clicks into place. 12 To reattach the lower rear door (rear output bin), hold the door at a 45º...

  • Page 380

    Lower rear door area jams (area 6) Open the lower rear door (rear output bin). Press down on the green levers and remove any paper. Lift the green levers and close the lower rear door. If printing does not resume, press . 366 Troubleshooting ENWW...

  • Page 381: To Disable Paper Jam Recovery

    Paper jam recovery feature This printer automatically provides paper jam recovery, a feature that allows you to set whether the printer should attempt to automatically reprint jammed pages. The options are: AUTO nter will attempt to reprint jammed pages. Printer will not attempt to reprint jammed pages. Note During the recovery process, the printer may reprint several good pages that were printed before the paper jam occurred.

  • Page 382

    Table 7-15 Common causes of paper jams Issue Cause Solution Common causes of Paper does not meet HP- Use only paper that meets HP specifications. See paper jams recommended paper Supported media weights and sizes. specifications. A supply item is installed...

  • Page 383: Paper Path Checklist

    If the paper is torn, folded, or wrinkled (typically along the leading edge), inspect the paper path for items that could be causing the damage. If the customer is using non-HP supplies, try replacing those supplies with genuine HP supplies to see if the problem goes away.

  • Page 384: Basic Troubleshooting For Paper Jams, Data Collection

    (non-HP supplies are known to cause paper jams) whether the customer is storing the paper correctly, overloading the trays, damaging the edge...

  • Page 385: Print Quality Problems Associated With Media, Overhead Transparency Defect

    Use paper that meets HP paper specifications. See Supported media weights and sizes. The surface of the paper is too smooth. Use paper that meets HP paper specifications. See Supported media weights and sizes. The driver setting is incorrect. To change the paper type setting, see Type and Size.

  • Page 386: Print Quality Problems Associated With The Environment, Print Quality Problems Associated With Paper Jams

    HP Color LaserJet 3500 series printer, go to http://www.hp.com/support/clj3500. For the HP Color LaserJet 3700 series printer, go to http://www.hp.com/support/clj3700. For downloadable manuals, select Manuals. The transparencies you are using are not designed for proper toner adhesion. Use only transparencies designed for HP Color LaserJet printers.

  • Page 387: Calibrating The Printer, Using Color, Hp Imageret, Paper Selection

    Press Using Color The HP Color LaserJet 3500 series printer and the HP Color LaserJet 3700 series printer offer great color printing as soon as you set up the printer. They provide a combination of automatic color features to generate excellent color results for the general office user. Also, the HP Color LaserJet 3700 series printer provides sophisticated tools for the professional who is experienced with using color.

  • Page 388: Standard Red-green-blue (srgb), Hp Color Laserjet 3700 Series Printer, Standard Red-green-blue (srgb)

    Microsoft as a common color language for monitors, input devices (scanners and digital cameras), and output devices (printers and plotters). It is the default color space used for HP products, Microsoft operating systems, the World Wide Web, and most office software sold today. The sRGB standard is representative of the typical Windows PC monitor today and the convergence standard for high-definition television.

  • Page 389: Managing Color, Print In Grayscale, Automatic Or Manual Color Adjustment

    CMYK ink set emulation (PostScript only) The printer’s color rendering of CMYK can be made to emulate several standard Offset Press ink sets. Default. This selection is good for general purpose rendering of CMYK data. It is designed to render photographs well, while at the same time providing rich saturated colors for text and graphics.

  • Page 390

    The two halftone options are Smooth and Detail. For the HP Color LaserJet 3700 series printer, the following options are available for the Halftone setting: The Smooth option provides better results for large, solid-filled print areas. It also enhances photographs by smoothing out fine color gradations.

  • Page 391: Matching Colors, Swatch Book Color Matching

    For the HP Color LaserJet 3700 series printer, the following values are available for the RGB Color settings: Default instructs the printer to interpret RGB color as sRGB. The sRGB standard is the accepted standard of Microsoft and the World Wide Web Consortium (http://www.w3.org).

  • Page 392: Adjusting Color Balance

    SWOP ink emulation. For best matching of PANTONE ® four-color (4C) process colors, use the SWOP or EURO emulation for CMYK inks in the HP Color LaserJet 3700 PostScript emulation driver when printing from PANTONE -certified applications. ®...

  • Page 393: Image Defects

    Image defects If specific defects occur repeatedly, print a Print Quality Troubleshooting page (see Print quality troubleshooting pages, in this chapter) and follow the instructions on the first page. If you are unable to resolve the problem, use the information in this section to identify the root cause of the problem.

  • Page 394: Light Image, Light Color

    Light image Table 7-17 Causes for light images Cause Solution Image density is not adjusted correctly. Calibrate the printer. See Calibrate Now, later in this chapter. The image density is not properly adjusted. Calibrate the printer. See Calibrate Now, later in this chapter.

  • Page 395: Dark Image, Dark Color, Completely Blank Image, All Black Or Solid Color

    Dark image Table 7-19 Causes for dark images Cause Solution Image density is not adjusted correctly. Calibrate the printer. See Calibrate Now, later in this chapter. Dirty color misregistration sensor lens. Clean the color misregistration sensor lens. Defective color misregistration sensor. Replace the color misregistration sensor.

  • Page 396: Dots In Vertical Lines, Dirt On Back Of Paper, Dirt On Front Of Paper

    Dots in vertical lines Table 7-23 Causes for vertical lines of white dots Cause Solution Deformed/Deteriorated transfer unit or primary Replace the transfer unit. transfer charging roller. Deformed/Deteriorated secondary transfer charging Replace the secondary transfer charging roller. roller. High-voltage PCB is defective. Replace the high-voltage PCB.

  • Page 397: Vertical Lines, White Vertical Lines, Horizontal Line

    Vertical lines Table 7-26 Causes for vertical lines Cause Solution Photosensitive drum has grooves going around the Replace the cartridge for the color of the vertical circumference. lines. Fuser sleeve has grooves around the circumference. Replace the fuser. White vertical lines If the lines appear in a particular color, go to step A.

  • Page 398: White Horizontal Line, Color Missing, Blank Spots

    White horizontal line If the line appears in a particular color, go to A. If it appears in full color, go to B. Table 7-29 Causes for white horizontal line Cause Solution A Horizontal scratches on the photosensitive drum Refer to the Repetitive defect cause table, later in (cartridge).

  • Page 399: Poor Fusing, Image Distortion

    Poor fusing Table 7-32 Causes for poor fusing Cause Solution Media is not within specifications. For example, media Use media that meets specifications. See F, in that is too thick causes poor fusing. chapter 1. Fuser is not within nip width specifications. Refer to the Repetitive defect cause table, later in...

  • Page 400: Color Misregistration

    Color misregistration If the misregistration occurs in a particular color, go to A. If it occurs in all colors, go to step B; otherwise, perform the steps in order, from the top down. Table 7-34 Causes for smearing Cause Solution The color misregistration is not properly adjusted.

  • Page 401: Misplaced Image, Reversed Color, Snail Tracks

    Misplaced image Table 7-36 Causes for a misplaced image Cause Solution Paper is skewed. See Table 7-12 on page 7-358 to resolve the reason for the skew. Oblique rollers are worn. (If problem only occurs on Replace the oblique rollers. the back side of duplex printing only.) DC controller PCB is defective.

  • Page 402

    Repetitive defects troubleshooting Defects on printer rollers can cause image defects to appear at regular intervals on the page. Use the repetitive defects ruler, see the figure Repetitive defects ruler following the table on the next page, to measure the distance between defects that recur on a page. Use Repetitive defect cause table, below, to determine which roller is causing the defect.

  • Page 403: Repetitive Defects Troubleshooting

    Table 7-39 Repetitive defect cause Period of Problem defect Problem Area (mm) Dirt on Blank Dirt on Poor front spots back fuser Tray 2 feed roller About 42 Tray 2 feed sub roller About 41 Registration roller About 44 Registration sub roller About 41 Primary charging roller About 26...

  • Page 404

    Figure 7-3 Repetitive defects ruler Note Repetitive defects for the transfer unit normally will appear every other page since the transfer belt is longer that a page. However, the distance of the repetitive can vary depending on the type of paper fed.

  • Page 405: Interface Troubleshooting, Communications Checks, Eio Troubleshooting

    EIO troubleshooting 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. Print a configuration page. If the Jetdirect card does not appear under “Installed personalities and options” on the configuration page (indicated by the arrow in Figure 7-4), see the troubleshooting section of the HP Jetdirect Print Server Software Installation Guide.

  • Page 406

    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 PCB. This circumstance is not covered by the Hewlett-Packard warranty.

  • Page 407: Parallel Dos Commands, Pjl Comment, Printer Job Language (pjl) Commands

    LPT1 in the example with the appropriate printer port. Printer Job Language (PJL) commands See the HP Printer Job Language Technical Reference Manual for a complete description of PJL commands. This manual is available with the HP PCL/PJL Reference Set on CD-ROM, part number 5021-0337.

  • Page 408: Pjl Info Config, Pjl Info Id, Pjl Info Ustatus, Pjl Info Pagecount, Pjl Job

    @PJL INFO CONFIG This command solicits a response to describe the installed options and allows the printer to configure the installed options automatically as the applications require. @PJL INFO ID This command identifies the printer type to the host for reference when selecting printer drivers for automatic installation.

  • Page 409: Pjl Ustatusoff

    @PJL USTATUSOFF This command disables the unsolicited JOB status for the I/O channel that delivered the command. For this printer, it duplicates the function of @PJL USTATUS JOB=OFF, AND @PJL USTATUS DEVICE=OFF. Note All commands not supported by this printer’s PJL command set are returned with the message @PJL XXXX<CR><LF>?<CR><LF>.

  • Page 410: Printing A Menu Map

    Printing a menu map to enter the MENUS. Press Menu to highlight INFORMATION. Press to select INFORMATION. Press to highlight PRINT MENU MAP. Press to select PRINT MENU MAP. Press Figure 7-5 Printer menu map (HP 3700 shown) 396 Troubleshooting ENWW...

  • Page 411: Control Panel Troubleshooting

    SUPPLIES STATUS Displays the supplies status in a scrollable list. PRINT USAGE PAGE HP 3700 only Prints a count of all media sizes that have passed through the printer; lists whether they were simplex, duplex, monochrome, or color; and reports the page count.

  • Page 412: Paper Handling Menu

    Note If you have used previous HP LaserJet printers, you might be accustomed to configuring Tray 1 to first mode or cassette mode. To mimic the settings for first mode, configure Tray 1 for size = ANY SIZE and type = ANY TYPE.

  • Page 413: Configure Device Menu

    X DIMENSION without dimensions. Available for Tray 1. Y DIMENSION DUPLEX HP 3700dn and 3700dtn only Allows you to enable or disable the duplex function (automatic 2-sided printing). The default is OFF. You can override this setting in the printer driver.

  • Page 414

    SUPPRESS BLANK PAGES sets whether jobs using PCL that include blank form feeds will automatically suppress the blank pages. YES indicates that form feeds will be ignored if the page is blank (HP Color LaserJet 3700 series printer only. 400 Troubleshooting...

  • Page 415: Print Quality Menu

    Print quality menu The Print quality menu allows you to adjust all aspects of print quality, including calibration, registration, and color halftone settings. Table 7-44 Print quality menu Menu item Values Description ADJUST COLOR CYAN DENSITY Allows you to modify the halftone settings for each color.

  • Page 416

    Table 7-44 Print quality menu (continued) Menu item Values Description OPTIMIZE T1 UP Allows you to optimize certain parameters for all jobs rather than (or in addition to) T1 DOWN optimizing by paper type. The default for each item is OFF. RESTORE OPTIMIZE resets all of the values to OFF.

  • Page 417

    Table 7-44 Print quality menu (continued) Menu item Values Description OPTIMIZE continued PRE-ROTATION - Use when a repetitive horizontal line occurs every 77 mm due to a print cartridge drum stoppage; or, use to reduce non-uniform color areas in overhead transparencies. RESTORE OPTIMIZE - Restores default values CALIBRATE NOW...

  • Page 418: System Setup Menu

    Ready message. The default is OFF. This menu item is displayed only if the printer is connected to a network (available for the HP Color LaserJet 3700n, 3700dn, and 3700dtn printer models). COLOR/BLACK MIX AUTO This menu item establishes how the printer...

  • Page 419

    OFF disables the RAM disk, but a minimal RAM disk is still available. The default is AUTO. HP Color LaserJet 3700 series printer only. LANGUAGE A list of available languages Sets the default control panel language.

  • Page 420

    Select ON if the printer uses USB 1.1 or Ethernet 10 base T. The default is OFF (available for the HP Color LaserJet 3500 series printer). PARALLEL INPUT...

  • Page 421: Diagnostics Menu

    Allows you to clear the page buffer, remove all SETTINGS perishable personality data, reset the printing environment, and return all default settings to factory defaults. However, this menu does not restore HP Jetdirect network settings to factory default values. POWERSAVE Allows you to enable and disable PowerSave. The default is ON.

  • Page 422: Service Menu

    When you select SERVICE from the list of menus, you are prompted to enter your 8-digit PIN number. The PIN for the HP Color LaserJet 3500 printer is 10350003 and for the HP Color LaserJet 3700 printer is 10370003.

  • Page 423: Tools For Troubleshooting

    (HP Color LaserJet 3700 series printer only) Using the embedded Web server (HP Color LaserJet 3700 series printer only) When the printer is directly connected to a computer, use the HP toolbox to view web pages for the printer status.

  • Page 424: Information Tab, Settings Tab, Networking Tab

    This tab allows the network administrator to control network-related settings for the printer when it is connected to an IP-based network. This tab will not appear if the printer is directly connected to a computer, or if the printer is connected to a network using anything other than an HP Jetdirect print server card.

  • Page 425: Other Links

    Order Supplies. Click this link to connect to the HP website and order genuine HP supplies, such as print cartridges and paper.

  • Page 426: Hp Toolbox

    Note You do not have to have Internet access to open and use the HP toolbox. However, if you click a link in the Other Links area, you must have Internet access to go to the site associated with the link.

  • Page 427: Hp Toolbox Sections

    Documentation tab Advanced Printer Settings window Each page in HP toolbox contains links to the HP website for product registration, product support, and for ordering supplies. You must have Internet access to use any of these links. If you use a dial-up connection and did not connect when you first opened the HP toolbox, you must connect before you can visit these web sites.

  • Page 428: Documentation Tab, Advanced Printer Settings Window

    You must set up an SMTP server to send e-mail alerts. - Administrative settings page On the Administrative settings page, you can set the frequency of how often the HP toolbox checks for printer alerts. Three settings are available: once per minute (every 60 seconds)

  • Page 429: Hp Toolbox Links

    HP Jetdirect print server. HP toolbox links The HP toolbox links at the left of the screen provide links to the following options: Select a device. Select from all HP toolbox-enabled devices. View current alerts. View the current alerts for all set up printers. (You must be printing to view current alerts.)

  • Page 430: Printer Configuration Page

    Note If the printer is configured with EIO cards (for example, an HP Jetdirect Print Server) an additional configuration page (shown below) will print for the HP Color LaserJet 3700 series printer only that provides EOI network information.

  • Page 431

    Figure 7-7 EIO page HP JetDirect configuration Security settings Network statistics TCP/IP settings IPX/SPX settings Novell/Netware settings AppleTalk settings DLC/LLC settings Tools for troubleshooting 417 ENWW...

  • Page 432: Supplies Status Page

    The printer returns to the Ready state after printing the supplies status page. Note If you are using non-HP supplies, the supplies status page will not show the remaining life for those supplies. Figure 7-8...

  • Page 433

    Usage page (HP 3700 only) The usage page lists a page count for each size of media that has passed through the printer. This page count includes the number of pages that were printed on one side, the number that were printed on two sides (duplexed), and totals of the two printing methods for each media size.

  • Page 434: Event Log

    Event log The event log lists the printer events, including printer jams, service errors, and other printer conditions. to enter the MENUS. Press to highlight DIAGNOSTICS. Press to select DIAGNOSTICS. Press to highlight PRINT EVENT LOG. Press to select PRINT EVENT LOG. Press The message PRINTING...

  • Page 435: Diagnostics, Diagnostics Flowchart

    Diagnostics Diagnostics flowchart Use this flowchart to help identify the cause of high-level printer problems. These problems are indicated by abnormalities in the printer’s power-on sequence. The LED that the flowchart refers to is on the formatter. Figure 7-12 on the next page indicates where this LED is located. This is a "heartbeat"...

  • Page 436: Engine Diagnostics

    Formatter LED Engine diagnostics This section provides an overview of the engine diagnostics incorporated into the HP Color LaserJet 3500 and 3700 series printer. The printer contains extensive internal diagnostics that help in troubleshooting print quality issues, paper path issues, noise issues, component issues, and timing issues.

  • Page 437

    When the printer is in the special diagnostics mode, the four tests listed above appear in the menu and are available to be run. To access other diagnostic tests or to leave the special state, press button, and then select EXIT DIAGNOSTICS. The printer will reset itself, and then return to the normal state.

  • Page 438: Printer Display Menu, Diagnostics Test Menu

    This test allows you to manually test paper path sensors and the door open switch. Each sensor is represented by a letter, as indicated in the tables below. Note The reversed paper sensor (PS9) and duplexing feed delivery paper sensor (PS10) are for the HP Color LaserJet 3700series printer only 424 Troubleshooting...

  • Page 439: Diagnostics From The Control Panel

    PS1: Tray 1 paper sensor PS 9 Reversed paper sensor (HP 3700 only) PS2: Tray 2 (cassette) paper sensor PS10: Duplexing feed delivery paper sensor Tray 3 paper sensor (see 500-sheet PS11: Face-up tray sensor paper feeder) PS12: Color misregistration sensor...

  • Page 440

    Media sensor 0, 1, 3, 4, 5, or 6* Misprint 0 or 1 Face-up tray sensor PS11 HP 3500 - 0 or 1 0 or 1 HP 3700 - X Waste toner full sensor PS13 HP 3500 - 0 or 1...

  • Page 441: Paper Path Test

    Close the front door. PS16, the secondary transfer roller engaging sensor, is not included in the sensor tests. A 59.99 on the control panel indicates an error occurred in the secondary transfer roller engaging mechanism. PS16 may be the cause of the error.- Paper Path Test This diagnostic will generate one or more test pages that you can use to isolate the cause of paper jams.

  • Page 442

    Component Test – special mode test The component test allows you to exercise individual parts independently to isolate problems. CONTINUOUS Each component test can be exercised once or repeatedly. If is selected as the repeat option, the test will cycle the component on and off. This process will repeat for 2 minutes, and then the test will terminate.

  • Page 443

    SL1: Tray 1 pick-up solenoid SL2: Tray 2 pick-up solenoid (pick-up/feed assembly) SL4: Secondary transfer roller engaging solenoid SL5: Duplex feed solenoid CL1: Registration clutch CL2: K development clutch (image drive unit) CL3: Developing engaging clutch (developing engaging drive unit) Figure 7-15 Location of solenoids and clutches The following 18 tests are available in the component test menu:...

  • Page 444

    6. CYAN LASER SCANNER Drives the scanner motor (cyan/black) for 10 seconds. 5. MAGENTA LASER SCANNER Drives the scanner motor (magenta/yellow) for 10 seconds. 6. YELLOW LASER SCANNER Drives the scanner motor (magenta/yellow) for 10 seconds. 7. DEVELOPER MOTORS Drives the developer motor (M4) which rotates the C,M,Y print cartridge developers. 8.

  • Page 445

    15. DUPLEX SOLENOID Drives the feed motor (M1) and the duplexing feed solenoid drive (SL5) which rotates the fuser, paper path rollers, and duplexing feed roller. Remove Tray 2 to see the gear turning on the right side of the duplex area inside Tray 2. 16.

  • Page 446: Information Menu, Configure Device Menu/printing Menu, Configure Device Menu/resets Menu, Configure Device Menu/print Quality Menu

    Print Supplies Status Page – prints a page that indicates remaining life of supplies. Supplies Status – displays on the control panel the remaining life of supplies. Print Usage Page – hp 3700 only. Indicates page count for each tray and the size and type of media printed.

  • Page 447: Test Pages, Engine Test Page, Formatter Test Page

    Test pages Printing test pages helps you determine whether the printer engine and the formatter are functioning. Engine test page To verify that the printer engine is functioning, print an engine test page. Use a small pointed object to depress the test page switch located on the left side of the printer, as shown in Figure 7-16.

  • Page 448: Cold Reset, Nvram Initialization

    Initializing NVRAM will reset the serial number, the event log, the page counts, the calibration settings, and the EIO card (HP 3700 only). Use the Service menu to restore the serial number and page counts. You will also need to reconfigure any computers that print to this printer to recognize the printer.

  • Page 449: Engine Resets, Calibrate Now

    Calibration bypass During certain diagnostic procedures, you will need to bypass the automatic calibration that is performed whenever the printer is turned on. To bypass calibration Turn the printer on and watch the control panel display. When the display begins showing the memory count, press and hold until all three lights on the control panel are lit.

  • Page 450

    This item allows you to reset the fuser count if the value is lost, such as when you replace the formatter. This value is initially set to zero at the factory. Enter a value up to 60,000 for the hp 3500 and 75,000 for the HP 3700.

  • Page 451: Restoring The Service Id, Converting The Service Id To An Actual Date, Cold Reset Paper

    Restoring the Service ID If you replace the formatter, the date is lost. Use this menu item to reset the date to the original date the printer was first used. The date format is YYDDD. Calculate the date as follows: To calculate YY, subtract 1990 from the calendar year.

  • Page 452: Main Parts

    Diagrams Main parts 1. Face-down delivery roller 11. Registration roller 2. Laser/scanner assembly 12. Tray 2 (cassette) separation roller 3. Print (toner) cartridge 13. Tray 2 (cassette) pickup roller 4. Photosensitive drum 14. Media sensor 5. Primary transfer charging roller 15.

  • Page 453: Diagrams

    Switches SW1: Door switch SW1001: Test print switch SW3001: Power switch Figure 7-18 Location of switches Diagrams 439 ENWW...

  • Page 454: Sensors

    Sensors PS1: Tray 1 paper sensor PS10: Duplexing feed delivery paper sensor PS2: Cassette paper sensor PS11: Face-up tray sensor PS4: Registration paper sensor PS12: Color misregistration sensor PS5: Media sensor PS13: Waste toner level sensor PS6: Fuser front paper sensor PS14: Developing engaging sensor PS7:...

  • Page 455

    Solenoids and clutches SL1: Tray 1 pick-up solenoid SL2: Tray 2 pick-up solenoid (pick-up/feed assembly) SL4: Secondary transfer roller engaging solenoid SL5: Duplex feed solenoid CL1: Registration clutch CL2: K development clutch (image drive unit) CL3: Developing engaging clutch (developing engaging drive unit) Figure 7-20 Location of solenoids and clutches Diagrams 441...

  • Page 456: Motors And Fans

    Motors and fans Feed motor Delivery motor Drum motor Developing motor Primary transfer roller engaging motor FAN1: Exhaust fan Figure 7-21 Location of motors and fans 442 Troubleshooting ENWW...

  • Page 457: Pcbs

    PCBs 1. DC controller PCB 4. Low-voltage power supply PCB 2. Memory controller PCB 5. Formatter PCB 3. High-voltage power supply PCBs 6. Control panel PCB Figure 7-22 PCB locations Diagrams 443 ENWW...

  • Page 458

    J1019 J1016 J1014 J1025 J1012 J1005 J1023 J1013 CP1015 J1028 J1031 J1001 J1002 SW1001 J1028 Figure 7-23 Location of DC controller PCB connectors (HP 3700) J1010 J1022 J1019 J1016 J1014 J1025 J1012 J1005 J1023 CP1015 J1029 J1031 J1001 J1002 J1028...

  • Page 459: Connector Locations

    J505A J101B J1027 J101A J1001 J1006 J1011 J1003 J5009 J5028 J5010 J1026 J1004 J9002 J716 J2001 J701 J9006 J702 J704 J3503 J3501 J3502 Figure 7-25 Connector locations for the HP Color LaserJet 3700 printer (1 of 2) Diagrams 445 ENWW...

  • Page 460

    J1010 J1019 J1024 J1009 J5003 J5005 J1025 J5029 J710 J706 J708 J1015 J1023 J1008 J1002 J1031 J901 J711 J707 J5013 J5026 J601 J3002 Figure 7-26 Connector locations for the HP Color LaserJet 3700 printer (2 of 2) 446 Troubleshooting ENWW...

  • Page 461

    J505A J101B J1027 J101A J1001 J1006 J1011 J5009 J1003 J5010 J5028 J1026 J1004 J9002 J716 J2001 J9006 J701 J702 J704 J3503 J3501 J3502 Figure 7-27 Connector locations for the HP Color LaserJet 3500 printer (1 of 2) Diagrams 447 ENWW...

  • Page 462

    J5014 J1010 J1019 J1024 J1009 J5003 J5005 J1025 J5029 J706 J708 J1015 J1023 J1008 J1002 J1031 J901 J711 J707 J5013 J5026 J601 J3002 Figure 7-28 Connector locations for the HP Color LaserJet 3500 printer (2 of 2) 448 Troubleshooting ENWW...

  • Page 463: General Circuit Diagram

    500-sheet paper feeder connectors J5012LA J5012LB J4001 J4004 J4003 J703 J4002 Figure 7-29 Connector locations for the 500-sheet paper feeder General circuit diagram The circuit diagram for the printer is provided in the following two figures. In addition, the 500-sheet feeder is also provided following the general circuit diagrams.

  • Page 464

    Figure 7-30 General circuit diagram (1 of 2) 450 Troubleshooting ENWW...

  • Page 465

    Figure 7-31 General circuit diagram (2 of 2) Diagrams 451 ENWW...

  • Page 466

    452 Troubleshooting ENWW...

  • Page 467

    Parts and diagrams Chapter contents This chapter contains the following sections. Introduction ......... . 454 Ordering parts .

  • Page 468: Ordering Parts, Supplies And Accessories

    Any item or part description followed by (HP3500) or (HP3700) indicates that the item or part is for use for the HP Color LaserJet 3500 series printer or the HP Color LaserJet 3700 series printer only. 454 Parts and diagrams...

  • Page 469

    Part number Description number Firmware DIMMs C9719-67901 16/64 programmed firmware DIMM Q3992-67901 16/128 programmed firmware DIMM for the HP 3700dn and HP 3700dtn bundles only Flash Memory (DIMMs) C4287A C9665-67951 4 MB Flash DIMM Memory upgrades C7848A C7848-67901 Synchronous 64 MB DIMM...

  • Page 470

    J6072A HP bt1300 Bluetooth wireless printer adapter (for USB or parallel) Supplies for the HP Q2670A Black print cartridge for the HP Color LaserJet 3500 Color LaserJet 3500 series printer series printer Q2671A Cyan print cartridge for the HP Color LaserJet 3500 series printer...

  • Page 471

    Table 8-1 Supplies and accessories (continued) Part Product Part number Description number Paper C2934A 50 sheets HP Color LaserJet Transparencies (letter) C2936A 50 sheets HP Color LaserJet Transparencies (A4) Q2419A HP LaserJet High Gloss paper (letter) C4179A 200 sheets HP LaserJet Soft...

  • Page 472

    Q1321-67918 Hebrew overlay Q1321-67919 Japanese overlay Q1321-67920 Korean overlay Q1321-67921 Simplified Chinese overlay Q1321-67922 Traditional Chinese overlay HP LaserJet Printer Family Paper Reference materials 5963-7863 Specifications Guide 5021-0337 PCL/PJL Technical Reference Package CD-ROM Supplies Q2670-67901 Black Print Cartridge-CLJ 3500/ 3700...

  • Page 473

    Note The only difference between the print cartridges listed above is that the Europe-only print cartridges have different languages on the instruction sheet inside the box.8Common fasteners Table 8-2 Common fasteners Illustration Description Size Part number SCREW, TP M4X6 XA9-1450-000CN Secures metal frame panels to metal frame panels.

  • Page 474

    460 Parts and diagrams ENWW...

  • Page 475

    DC Controller are replaced at the same time. This file will only work in the current printer. Call for assistance from HP Support to obtain the PJL file. Also, perform the Formatter and DC Controller replacement steps as required below.

  • Page 476: Replacement Configuration

    Formatter (previously installed in another printer) replacement configuration When the formatter PCB is being replaced with one that was installed in another printer, an NVRAM initialization will need to be performed. Before doing an NVRAM INIT, print a configuration page and a supplies status page in the INFORMATION menu to obtain the page counts, counts for any of the supplies, serial number, and the born-on date.

  • Page 477

    Note For the HP Color LaserJet 3700 series printer, a non-duplexing printer can obtain the ability to duplex if the DC Controller was previously installed in an HP Color LaserJet 3700 series printer that had duplexing.

  • Page 478: Laser/scanner Assembly Replacement Configuration

    Color Misregistration Sensor (PS12) replacement configuration To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW. Laser/scanner Assembly replacement configuration To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW.

  • Page 479: Illustrations And Parts Lists

    Illustrations and parts lists The following illustrations and parts tables list the field replaceable units (FRUs) for this printer. At the end of this chapter are two tables listing all of the parts shown in this chapter. Table 8-28, “Alphabetical parts list,” lists the parts in alphabetical order, and Table , “Numerical parts list,” lists the parts in numerical order by part number.

  • Page 480

    Figure 8-1 Main parts (1 of 3) 466 Parts and diagrams ENWW...

  • Page 481

    Figure 8-2 Main parts (2 of 3) Illustrations and parts lists 467 ENWW...

  • Page 482

    Figure 8-3 Main parts (3 of 3) 500-sheet paper feeder Figure 8-4 PCB locations (1 of 2) 468 Parts and diagrams ENWW...

  • Page 483

    Table 8-3 PCB locations Description Quantity Part number DC controller PCB (HP3500) RM1-0510-000CN DC controller PCB (HP3700) RM1-0506-000CN Memory controller PCB RM1-0508-000CN High-voltage power supply PCBs RM1-0505-000CN Low-voltage power supply PCB (110-127V) RK2-0157-000CN Low-voltage power supply PCB (220-240V) RK2-0158-000CN Formatter PCB (HP3500) Q1319-69001 Formatter PCB (HP3700) Q1321-69001...

  • Page 484

    Figure 8-6 External covers and panels 470 Parts and diagrams ENWW...

  • Page 485

    Table 8-5 External covers and panels Part number Quantity Description RM1-0443-000CN FRONT ROD LEFT ASS'Y RM1-0444-000CN FRONT ROD RIGHT ASS'Y RM1-0465-000CN TOP COVER ASS'Y RM1-0466-000CN LEFT COVER ASS'Y RM1-0467-000CN LEFT FRONT COVER ASS'Y RM1-0468-000CN FACE-UP TRAY ASS'Y RC1-1563-000CN COVER, RIGHT RC1-1565-000CN COVER, REAR RC1-1566-000CN...

  • Page 486

    Figure 8-7 Front door assembly 472 Parts and diagrams ENWW...

  • Page 487

    Table 8-6 Front door assembly Part number Quantity Description RM1-0463-000CN FRONT DOOR ASSEMBLY RM1-0464-000CN MULTI-PURPOSE TRAY ASS'Y RC1-1158-000CN ROD, FRONT COVER, LEFT RC1-1159-000CN ROD, FRONT COVER, RIGHT RC1-1176-000CN LEVER, INTERLOCK SWITCH RC1-1247-000CN LEVER, ITB COUPLIN, 1 RC1-1575-000CN LINK, MP HINGE, LEFT RC1-1576-000CN LINK, MP HINGE, RIGHT RC1-1574-000CN...

  • Page 488

    Figure 8-8 Internal components (1 of 4) 474 Parts and diagrams ENWW...

  • Page 489

    Table 8-7 Internal components (1 of 4) Part number Quantity Description RC1-1603-000CN PLATE, JOINT, RIGHT RC1-1605-000CN COVER, SCREW RM1-0505-000CN HIGH-VOLTAGE PCB ASS'Y RC1-1642-000CN RAIL, SWING, LEFT FRONT RC1-1175-000CN ARM, INTERLOCK SWITCH RM1-0438-000CN LOCK GUIDE RIGHT ASS'Y RM1-0440-000CN DRAWER CROSSMEMBER ASS'Y RM1-0446-000CN DEVELOPING CONTACT ASS'Y RC1-1572-000CN...

  • Page 490

    Figure 8-9 Internal components (2 of 4) 476 Parts and diagrams ENWW...

  • Page 491

    Table 8-8 Internal components (2 of 4) Part number Quantity Description RC1-1284-000CN GEAR, 31T/19T RC1-1300-000CN GEAR, 54T/17T RC1-1302-000CN GEAR, 79T RC1-1270-000CN BUSHING RC1-1353-000CN COVER, MOTOR RC1-1488-000CN COVER, CONNECTOR RC1-1497-000CN GEAR, 25T RC1-1500-000CN SHAFT, DRIVE RC1-1355-000CN PLATE, MOUNTING XD9-0136-000CN RING, E RC1-1630-000CN BUSHING RC1-1649-000CN...

  • Page 492

    Table 8-8 Internal components (2 of 4) (continued) Part number Quantity Description RM1-0482-000CN CABLE, CPR CONNECTING RM1-0483-000CN CABLE, FORMATTER POWER SUPPLY (HP3700) RM1-0498-000CN CABLE, FORMATTER POWER SUPPLY (HP3500) RM1-0488-000CN CABLE, LEFT FRONT RK2-0247-000CN CLUTCH, ELECTROMAGNETIC WT2-5841-000CN CLAMP, CABLE VS1-5057-002CN CONNECTOR, 2P RK2-0141-000CN SOLENOID 478 Parts and diagrams...

  • Page 493

    Figure 8-10 Internal components (3 of 4) Illustrations and parts lists 479 ENWW...

  • Page 494

    Table 8-9 Internal components (3 of 4) Part number Quantity Description RC1-1156-000CN GUIDE, ROD, LEFT WP2-5156-000CN SENSOR UNIT, HUMIDITY RC1-1177-000CN SPRING, GROUNDING RM1-0419-000CN DEV. DISENGAGING DRIVE ASS'Y RC1-2437-000CN SHEET, CABLE RETAINING RM1-0493-000CN CABLE, ENVIRONMENT SENSOR RC1-1252-000CN GEAR, 120T/17T RM1-0441-000CN SWING ROD LEFT ASS'Y RM1-0442-000CN SWING ROD RIGHT ASS'Y RC1-1345-000CN...

  • Page 495

    Figure 8-11 Internal components (4 of 4) Illustrations and parts lists 481 ENWW...

  • Page 496

    Table 8-10 Internal components (4 of 4) Part number Quantity Description RC1-1181-000CN GUIDE, CABLE RC1-1213-000CN GEAR, 86T/23T RC1-1602-000CN PLATE, JOINT, LEFT RM1-0506-000CN DC CONTROLLER PCB (HP3700) RM1-0510-000CN DC CONTROLLER PCB (HP3500) Q1321-69001 FORMATTER PCB (HP3700) includes cage Q1319-69001 FORMATTER PCB (HP3500) includes cage RC1-2236-000CN COVER, CONTROLLER (HP3500)

  • Page 497

    Figure 8-12 Center Frame Assembly Illustrations and parts lists 483 ENWW...

  • Page 498

    Table 8-11 Center frame assembly Part number Quantity Description RC1-1243-000CN BUSHING WG8-5362-000CN PHOTO-INTERRUPTER, TLP1241 WT2-5841-000CN CLAMP, CABLE RM1-0508-000CN MEMORY CONTROLLER PCB ASS'Y RC1-1328-000CN SPRING, TORSION RC1-1329-000CN HOLDER, SENSOR RC1-1330-000CN FLAG, SENSOR RC1-1343-000CN HOLDER, MEMORY CONTROLLER RC1-1349-000CN PLATE, SHIELD RC1-1640-000CN COVER, LASER SHUTTER 484 Parts and diagrams ENWW...

  • Page 499

    Figure 8-13 Main Right Side Plate Assembly / Motors Illustrations and parts lists 485 ENWW...

  • Page 500

    Table 8-12 Main right side plate assembly / Motors Part number Quantity Description RC1-1148-000CN LEVER, SWING LOCK, RIGHT RC1-1149-000CN SPRING, TENSION RK2-0139-000CN MOTOR (M5) RC1-1231-000CN GEAR, 59T RC1-1218-000CN BUSHING RC1-3240-000CN GEAR, 74T RC1-1229-000CN GEAR, 90T/28T RC1-1230-000CN GEAR, 74T RC1-1233-000CN GEAR, 69T RC1-1234-000CN GEAR, 29T RC1-1242-000CN...

  • Page 501

    Table 8-12 Main right side plate assembly / Motors (continued) Part number Quantity Description RM1-0733-000CN DRUM MOTOR ASS'Y(M3) RC1-2330-000CN PAD, CUSHION RC1-1038-000CN DAMPER UNIT, MP PICK-UP XD2-2100-602CN RING, GRIP Illustrations and parts lists 487 ENWW...

  • Page 502

    Figure 8-14 Main Left Side Plate Assembly 488 Parts and diagrams ENWW...

  • Page 503

    Table 8-13 Main left side plate assembly Part number Quantity Description RC1-1049-000CN HOLDER, SENSOR RC1-1050-000CN LENS RC1-1151-000CN PLATE, CONTACT RC1-1152-000CN PLATE, CONTACT RC1-1153-000CN PLATE, CONTACT RC1-1155-000CN PLATE, CONTACT RC1-1169-000CN ARM, DRUM LOCK, LEFT VS1-6492-010CN CONNECTOR, SNAP TIGHT, W RM1-0509-000CN SENSOR UNIT, TCU FULL DETECT RC1-1185-000CN SPRING, TENSION RC1-1622-000CN...

  • Page 504

    Figure 8-15 Lower Frame Assembly - HP3700 (1 of 2) 490 Parts and diagrams ENWW...

  • Page 505

    Figure 8-16 Lower Frame Assembly - HP3500 (2 of 2) Illustrations and parts lists 491 ENWW...

  • Page 506

    Table 8-14 Lower frame assembly - HP3500 and HP3700 Part number Quantity Description RB2-6324-000CN CLUTCH, MECHANICAL RC1-1496-000CN HOLDER, SENSOR RC1-1514-000CN LEVER, SENSOR RC1-2322-000CN GUIDE, CABLE RC1-2323-000CN GUIDE, CABLE RC1-1491-000CN GUIDE, CASSETTE, LEFT RL1-0203-000CN MOUNT, SOLENOID (HP3700) RC1-1511-000CN MOUNT, SOLENOID (HP3500) RM1-0458-000CN DUPLEX GUIDE ASS'Y (HP3700) RM1-0459-000CN...

  • Page 507

    Figure 8-17 Image Drive Assembly Table 8-15 Image drive assembly Part number Quantity Description RM1-0415-000CN IMAGE DRIVE ASSEMBLY RK2-0248-000CN CLUTCH, ELECTROMAGNETIC Illustrations and parts lists 493 ENWW...

  • Page 508

    Figure 8-18 Developing Disengaging Assembly Table 8-16 Developing disengaging assembly Part number Quantity Description RM1-0434-000CN DEVELOPING DISENGAGING ASSENBLY RK2-0176-000CN CLUTCH, ELECTROMAGNETIC XD9-0135-000CN RING, E 494 Parts and diagrams ENWW...

  • Page 509

    Figure 8-19 Tray 2 (cassette) Table 8-17 Tray 2 (cassette) Part number Quantity Description RM1-0470-000CN TRAY 2 (CASSETTE) RB2-3003-040CN PLATE, END RS6-2021-000CN SPRING, COMPRESSION RC1-0954-000CN PAD, SEPARATION Illustrations and parts lists 495 ENWW...

  • Page 510

    Figure 8-20 Pick-up/Feed assembly (1 of 2) 496 Parts and diagrams ENWW...

  • Page 511

    Figure 8-21 Pick-up/Feed assembly (2 of 2) Illustrations and parts lists 497 ENWW...

  • Page 512

    Table 8-18 Pick-up/feed assembly Part number Quantity Description RM1-0449-000CN PICK-UP/FEED ASS'Y (HP3700) RM1-0760-000CN PICK-UP/FEED ASS'Y (HP3500) RM1-0739-000CN SEPARATION PAD ASS'Y RK2-0145-000CN SOLENOID RM1-0740-000CN TRANSFER ROLLER ASS'Y RC1-1433-000CN CLUTCH, MECHANICAL RC1-1456-000CN LEVER, SENSOR RC1-1464-000CN SPRING, TORSION RC1-0939-000 PAD, SEPARATION RC1-1535-000CN ROLLER, PICK-UP RM1-0451-000CN COLOR MIS-REG.

  • Page 513

    Figure 8-22 Tray 2 (cassette) pick-up assembly Table 8-19 Tray 2 (cassette) pick-up assembly Part number Quantity Description WG8-5362-000CN PHOTO-INTERRUPTER, TLP1241 Illustrations and parts lists 499 ENWW...

  • Page 514

    Figure 8-23 Face-down delivery assembly Table 8-20 Face-down delivery assembly Part number Quantity Description RM1-0469-000CN FACE-DOWN DELIVERY ASSEMBLY WG8-5362-000CN PHOTO-INTERRUPTER, TLP1241 500 Parts and diagrams ENWW...

  • Page 515

    Figure 8-24 Transfer Unit Table 8-21 Transfer unit Part number Quantity Description Q3658-69001 TRANSFER UNIT Illustrations and parts lists 501 ENWW...

  • Page 516

    Figure 8-25 Right Swing Frame Assembly Table 8-22 Right swing frame assembly Part number Quantity Description RM1-0437-000CN RIGHT SWING FRAME ASS'Y 502 Parts and diagrams ENWW...

  • Page 517

    Figure 8-26 Left Swing Frame Assembly Table 8-23 Left swing frame assembly Part number Quantity Description RM1-0439-000CN LEFT SWING FRAME ASS'Y Illustrations and parts lists 503 ENWW...

  • Page 518

    Figure 8-27 Fuser 504 Parts and diagrams ENWW...

  • Page 519

    Table 8-24 Fuser assembly Part number Quantity Description Q3655-69001 Fuser (110-127V) Q3656-69001 Fuser (220-240V) Illustrations and parts lists 505 ENWW...

  • Page 520

    Figure 8-28 500-Sheet paper feeder main body 506 Parts and diagrams ENWW...

  • Page 521

    Table 8-25 500-Sheet paper feeder main body Part number Quantity Description RC1-2178-000CN COVER, FRONT RC1-2179-000CN COVER, REAR RC1-2180-000CN COVER, LEFT RB2-3489-000CN COVER, LOWER, LEFT RB2-6448-000CN ARM, SENSOR RB2-6450-000CN SPRING, LEAF RB2-6452-000CN CROSSMEMBER RB2-6453-000CN COVER, SENSOR RC1-2175-000CN PLATE, GROUNDING RC1-2182-000CN BUSHING RC1-2192-000CN BUSHING RC1-2280-000CN...

  • Page 522

    Figure 8-29 500-Sheet paper feeder paper pick-up drive assembly Table 8-26 500-Sheet paper feeder paper pick-up drive assembly Part number Quantity Description RM1-0701-000CN PAPER PICK-UP DRIVE ASS'Y RM1-0707-000CN SWING ASS'Y RM1-0768-000CN PAPER FEEDER DRIVER PCB ASS'Y 508 Parts and diagrams ENWW...

  • Page 523

    Figure 8-30 500-Sheet paper feeder tray (Tray 3) Illustrations and parts lists 509 ENWW...

  • Page 524

    Table 8-27 500-Sheet paper feeder paper tray (Tray 3) Part number Quantity Description RM1-0705-000CN PAPER TRAY 3, 500-SHEET FEEDER RB2-6469-000CN PLATE, END RC1-2191-000CN SPRING, COMPRESSION RM1-0827-000CN PAPER SEPARATION PAD ASS'Y 510 Parts and diagrams ENWW...

  • Page 525: Alphabetical Parts List

    Alphabetical parts list Table 8-28 Alphabetical parts list Description Part number Figure ARM, DRUM LOCK, LEFT RC1-1170-000CN 8 - 10 ARM, DRUM LOCK, LEFT RC1-1169-000CN 8 - 14 ARM, DRUM LOCK, LEFT RC1-1622-000CN 8 - 14 ARM, DRUM LOCK, LEFT RC1-1623-000CN 8 - 14 ARM, DRUM LOCK, RIGHT...

  • Page 526

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure CABLE, LEFT FRONT RM1-0488-000CN 8 - 9 CABLE, MAIN (HP3500) RM1-0495-000CN 8 - 11 CABLE, MAIN (HP3700) RM1-0475-000CN 8 - 11 CABLE, OPERATION PANEL RM1-0489-000CN 8 - 6 CABLE, OPTION CONNECTING (HP3500) RM1-0496-000CN 8 - 15 &...

  • Page 527

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure COVER, HINGE RC1-2296-000CN 8 - 6 COVER, JAM CLEARING RC1-1566-000CN 8 - 6 COVER, LASER SHUTTER RC1-1640-000CN 8 - 12 COVER, LEFT RC1-2180-000CN 8 - 28 COVER, LOWER FRAME (HP3500) RC1-2237-000CN 8 - 15 &...

  • Page 528

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure FAN (HP3500) RK2-0153-000CN 8 - 10 FAN (HP3700) RK2-0017-000CN 8 - 10 FLAG, SENSOR RC1-1330-000CN 8 - 12 FOOT RC1-2165-000CN 8 - 28 FOOT ASS'Y RM1-0459-000CN 8 - 15 & 16 FORMATTER PCB ASS'Y (HP3500) Q1319-69001 8 - 11...

  • Page 529

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure GUIDE, CABLE RC1-1181-000CN 8 - 11 GUIDE, CABLE RC1-2322-000CN 8 - 15 & 16 GUIDE, CABLE RC1-2323-000CN 8 - 15 & 16 GUIDE, CABLE RC1-1306-000CN 8 - 15 & 16 GUIDE, CASSETTE, LEFT RC1-1491-000CN 8 - 15 &...

  • Page 530

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure MEDIA SENSOR ASS'Y RM1-0452-000CN 8 - 20 & 21 MEMORY CONTROLLER PCB RM1-0508-000CN 8 - 4 MEMORY CONTROLLER PCB ASS'Y RM1-0508-000CN 8 - 12 MICROSWITCH RK2-0150-000CN 8 - 11 MOTOR RK2-0139-000CN 8 - 13 MOTOR...

  • Page 531

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure PLATE, CONTACT RC1-1153-000CN 8 - 14 PLATE, CONTACT RC1-1155-000CN 8 - 14 PLATE, DC CONTROLLER SUPPORT RC1-1348-000CN 8 - 11 PLATE, DRIVE RC1-1277-000CN 8 - 13 PLATE, END RB2-3003-040CN 8 - 19 PLATE, END RB2-6469-000CN 8 - 30...

  • Page 532

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure SCREW, STEPPED, M4X4.5 XB4-7401-005CN SCREW, TP XA9-1445-000CN SCREW, TP, M4X6 XA9-1450-000NC SCREW, W/WASHER, M3X12 XA9-1420-000CN SCREW, W/WASHER, RS, M3X6 XA9-1477-000CN SCREW, W/WASHER,M3X6 XA9-1450-000CN SCREW,TAPPING,TRUSS HEAD,M4X10 XB4-7300-805CN SE RING (HP3500) XD2-2300-402CN 8 - 6 SENSOR UNIT, HUMIDITY WP2-5156-000CN...

  • Page 533

    Table 8-28 Alphabetical parts list (continued) Description Part number Figure STOPPER, ARM, LEFT RC1-1627-000CN 8 - 14 STOPPER, ARM, RIGHT RC1-1546-000CN 8 - 13 STOPPER, ARM, RIGHT RC1-2339-000CN 8 - 13 STOPPER, FRONT HINGE, LEFT RL1-0215-000CN 8 - 8 STOPPER, HINGE, RIGHT RC1-1607-000CN 8 - 8 STRAP, DAMPER...

  • Page 534: Numerical Parts List

    Numerical parts list Table 8-29 Numerical parts list Part number Description Figure Q1319-69001 FORMATTER PCB HP3500 8 - 4 Q1319-69001 FORMATTER PCB ASS'Y (HP3500) 8 - 11 Q1321-69001 FORMATTER PCB HP3700 8 - 4 Q1321-69001 FORMATTER PCB ASS'Y (HP3700) 8 - 11 Q3655-69001 FUSER (110-127V) 8 - 27...

  • Page 535

    Table 8-29 Numerical parts list (continued) Part number Description Figure RC1-1177-000CN SPRING, GROUNDING 8 - 10 RC1-1181-000CN GUIDE, CABLE 8 - 11 RC1-1184-000CN SPRING, TENSION 8 - 10 RC1-1185-000CN SPRING, TENSION 8 - 14 RC1-1186-000CN MOUNT, REGISTRATION CLUTCH 8 - 9 RC1-1213-000CN GEAR, 86T/23T 8 - 11...

  • Page 536

    Table 8-29 Numerical parts list (continued) Part number Description Figure RC1-1302-000CN GEAR, 79T 8 - 9 RC1-1306-000CN GUIDE, CABLE 8 - 15 & 16 RC1-1310-000CN BUSHING 8 - 13 RC1-1328-000CN SPRING, TORSION 8 - 12 RC1-1329-000CN HOLDER, SENSOR 8 - 12 RC1-1330-000CN FLAG, SENSOR 8 - 12...

  • Page 537

    Table 8-29 Numerical parts list (continued) Part number Description Figure RC1-1548-000CN SPRING, TENSION 8 - 13 RC1-1555-000CN TRAY, AUXILIARY 8 - 6 RC1-1562-000CN COVER, DIMM 8 - 6 RC1-1563-000CN COVER, RIGHT 8 - 6 RC1-1565-000CN COVER, REAR 8 - 6 RC1-1566-000CN COVER, JAM CLEARING 8 - 6...

  • Page 538

    Table 8-29 Numerical parts list (continued) Part number Description Figure RC1-2175-000CN PLATE, GROUNDING 8 - 28 RC1-2178-000CN COVER, FRONT 8 - 28 RC1-2179-000CN COVER, REAR 8 - 28 RC1-2180-000CN COVER, LEFT 8 - 28 RC1-2182-000CN BUSHING 8 - 28 RC1-2191-000CN SPRING, COMPRESSION 8 - 30 RC1-2192-000CN...

  • Page 539

    Table 8-29 Numerical parts list (continued) Part number Description Figure RK2-0153-000CN FAN (HP3500) 8 - 10 RK2-0157-000CN LOW-VOLTAGE POWER SUPPLY PCB 110-127V 8 - 4 RK2-0158-000CN LOW-VOLTAGE POWER SUPPLY PCB 220-240V 8 - 4 RK2-0162-000CN CABLE, FFC (HP3700) 8 - 11 RK2-0163-000CN CABLE, TM FFC 8 - 11...

  • Page 540

    Table 8-29 Numerical parts list (continued) Part number Description Figure RM1-0461-000CN DUPLEX FEED GUIDE ASS'Y (HP3700) 8 - 15 & 16 RM1-0462-000CN POSITION GUIDE ASS'Y (HP3700) 8 - 15 & 16 RM1-0463-000CN FRONT COVER ASS'Y 8 - 7 RM1-0464-000CN MULTI-PURPOSE TRAY ASS'Y 8 - 7 RM1-0465-000CN TOP COVER ASS'Y...

  • Page 541

    Table 8-29 Numerical parts list (continued) Part number Description Figure RM1-0707-000CN SWING GUIDE ASS'Y 8 - 29 RM1-0709-000CN SUB ROLLER ASS'Y 8 - 28 RM1-0731-000CN CASSETTE PICK-UP ROLLER ASS'Y 8 - 9 RM1-0731-000CN TRAY 2 PICK-UP ROLLER ASS'Y 8 - 28 RM1-0733-000CN DRUM MOTOR ASS'Y 8 - 13...

  • Page 542

    Table 8-29 Numerical parts list (continued) Part number Description Figure WT2-5841-000CN CLAMP, CABLE 8 - 12 XA9-1420-000CN SCREW, W/WASHER, M3X12 XA9-1445-000CN SCREW, TP XA9-1450-000CN SCREW, W/WASHER,M3X6 XA9-1450-000NC SCREW, TP, M4X6 XA9-1452-000CN SCREW, RS, M3X6 XA9-1461-000CN SCREW W/WASHER, M3X8 XA9-1477-000CN SCREW, W/WASHER, RS, M3X6 XA9-1499-000CN SCREW, RS, M3X8 XA9-1500-000CN...

  • Page 543: Cartridge Cleaning Control

    ASCII escape sequence 72 automatic adjustment 375 assemblies CMYK 374 locating 14 CMYK ink set emulation 375 remanufactured 35 HP ImageREt 2400 373 replacing 34 managing 375 atmospheric pressure 12 manual adjustment 375 AUTOEXEC.BAT, parallel I/O settings 393 matching 377...

  • Page 544: Drum Motor (m3) Removal

    transfer unit replacement 345, 464 Deskjet transparencies, avoiding 19 USB 62 detection configuration page cartridge life 154 printing 416 cartridge presence 154 connectors color misregistration 170 locating 445 developing cylinder engaging/disengaging 156 control panel failure 121 diagnostics 424 failure, laser diode 135 error messages 309 failure, scanner motor 137 locking 71...

  • Page 545: Environment Sensor (ps15) Removal

    PCB does not work, re-enabling 342, 461 removal and replacement 273 feed unit (HP 3700) 185 replacement configuration 342, 461 duty cycle 13 replacement configuration, previously installed 343, front cover, 500-sheet paper feeder removal and replacement 290 front door...

  • Page 546

    M4 - developing motor (M4) 266 control panel overlay 60 M5 - transfer roller engaging motor 268 DIMMs 74 maintenance HP Jetdirect external print server 80, 82 agreements 41 memory 74 printer 85 print cartridges 52 managing intermediate transfer belt - see, ITB 211...

  • Page 547

    I/O (EIO) 64 removal and replacement 296 enhanced I/O (EIO) configuration 64 parallel enhanced I/O interfaces 65 configuration 63 HP Web Jetadmin 68 part numbers I/O interfaces 65 control panel overlays 457 Novell NetWare 65 developing disengaging assembly 491...

  • Page 548

    372 Commercial Service and Support Organizations 34 print server pick-up clutch, 500-sheet paper feeder HP Jetdirect 64 removal and replacement 295 installing 80, 82 pick-up drive unit, 500-sheet paper feeder print/stop test 431 removal and replacement 293...

  • Page 549: Registration Paper Sensor (ps4) Removal

    Tray 2 285 developing engaging drive assembly 217 tray 2 end plate 285 developing engaging drive clutch (CL3) 261 tray 2 guide, right (HP 3700 285 developing engaging sensor (PS14) 254 tray 2 guide, right (HP 3700) 288 developing motor M4) 266...

  • Page 550

    436 replacing 88, 199 serial numbers 7 status page, printing 418 service storing 12 agreements 41 Support Assistant, HP 35 approach 34 swatch book color matching 377 ID 436 swing guide, left next-day on-site 41 removal and replacement 234, 237...

  • Page 551: Paper Jam Error Message

    387 loading paper 56 skewed paper 358 removal and replacement 285 smearing 386 tray 2 guide, right (HP 3500) snail tracks 387 removal and replacement 288 status messages 308 tray 2 guide, right (HP 3700) toner buildup 372...

  • Page 552: Usb Configuration

    40 waste toner full detection 161 waste toner level sensor (PS13) removal and replacement 254 websites HP 5 Material Safety Data Sheet (MSDS) 25 printer specifications 11, 13 product and support information 35 service part information 35 weight...

  • Page 554

    © 2003 Hewlett-Packard Development Company, L.P. www.hp.com Q1321-90930...

Comments to this Manuals

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Latest comments:
  • qazitraders Aug 03, 2017 12:00:
    good book for repair, first i read than after re]a[r the printer
  • qazitraders Aug 03, 2017 12:32:
    good book for repair, first i read than after re]a[r the printer