HP LaserJet 6L Service Manual

HP LaserJet 6L Manual

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  • HP LaserJet 6L | Service Manual - Page 1
    HP LaserJet 5L and 6L Printer Service Manual
  • HP LaserJet 6L | Service Manual - Page 2
    Service Manual HP LaserJet 5L HP LaserJet 6L (C3941A) (C3990A)
  • HP LaserJet 6L | Service Manual - Page 3
    laws. Publication number C3990-90991 First edition, May 1997 Warranty The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties or merchantability
  • HP LaserJet 6L | Service Manual - Page 4
    Note Caution WARNING! Conventions This manual uses the following conventions: Color is used to emphasize items which are important to the material under discussion. The names of major printer parts and assemblies are CAPITALIZED. Bold is used for emphasis, particularly in situations where italic
  • HP LaserJet 6L | Service Manual - Page 5
    -referenced here by part number and name. B Regulatory Information Here are required statements regarding RFI and laser safety. C Service Notes Service Notes for HP LaserJet 5L concerning paper jams appear here. Subject Index Use the subject index to quickly locate any information in the manual. iv
  • HP LaserJet 6L | Service Manual - Page 6
    Front Door Assemblies 1-8 Figure 1-5 Back View of the Printer 1-9 Figure 2-1 Printer Space Requirements 2-4 Figure 2-2 Toner Cartridge Distribution 2-6 Figure 3-1 Self-test Page for HP LaserJet 5L 3-7 Figure 3-2 Self-test Page for HP LaserJet 6L 3-8 Figure 3-3 Engine Test Button 3-10 Figure
  • HP LaserJet 6L | Service Manual - Page 7
    Inside/Front View) 6-29 Figure 6-26 Paper Feed Frame Removal (1 of 4 6-30 Figure 6-27 Paper Feed Frame Removal (2 of 4 6-31 Figure 6-28 Paper Feed Frame Removal (3 of 4 6-32 Figure 6-29 Paper Feed Frame Removal (4 of 4 6-33 Figure 6-30 Transfer Roller Guide & Transfer Roller Removal (Inside/Back
  • HP LaserJet 6L | Service Manual - Page 8
    of 2 7-8 Printer Status Messages (Continued 2 of 2 7-9 Unclearable Error 7-9 Service and Error Messages (1 of 3 7-10 Service and Error Messages (Continued 2 of 3 7-11 Service and Error Messages (Continued 3 of 3 7-12 High-Voltage Power Supply Check 7-24 Paper Curl Troubleshooting 7-26 Cable
  • HP LaserJet 6L | Service Manual - Page 9
    viii
  • HP LaserJet 6L | Service Manual - Page 10
    1-7 Front Door Assemblies 1-8 Back View of the Printer 1-9 Service Approach 1-10 Parts Exchange Program 1-10 Ordering Parts 1-10 Ordering Consumables 1-10 Ordering Related Documentation 1-10 Technical Assistance 1-12 Worldwide Support 1-13 North American Response Center 1-13 Warranty 1-14
  • HP LaserJet 6L | Service Manual - Page 11
    1-2 Product Information
  • HP LaserJet 6L | Service Manual - Page 12
    Printer Features Printer Features Features Descriptions Print Speed 4 ppm (HP LaserJet 5L); 6 ppm (HP LaserJet 6L) Text & Graphics Resolution 300 or 600 dpi Printer Language Enhanced PCL 5 Monthly Usage (pages) 4,000 pages (HP LaserJet 5L); 6,000 pages (HP LaserJet 6L) Memory: Standard1
  • HP LaserJet 6L | Service Manual - Page 13
    serial numbers are listed on identification labels located on the bottom of the printer. The model number is alphanumeric, such as C3941A for the HP LaserJet 5L printer, and C3990A for the HP LaserJet 6L printer. The serial number contains information about the Country of Origin, the Revision Level
  • HP LaserJet 6L | Service Manual - Page 14
    Product 1 Information Figure 1-2 HP LaserJet 6L Model and Serial Numbers Product Information 1-5
  • HP LaserJet 6L | Service Manual - Page 15
    HP LaserJet 5L Monthly Usage (Duty Cycle): HP LaserJet 6L 4,000 pages 6,000 pages Life Expectancy of Toner Cartridge (pages)** 2,500 pages @ 5% coverage First Print A4
  • HP LaserJet 6L | Service Manual - Page 16
    Overview Front/Side Views of the Printer 1. Paper Input Support 2. Paper Output Support 3. Paper Guides 4. Error (top) Light 5. Data (middle) Light 6. Ready (bottom) Light 7. Front Panel Button 13. Front Output Slot (face-up) 8. Paper Output Bin 9. Paper Path Lever 10. Serial and Model
  • HP LaserJet 6L | Service Manual - Page 17
    Figure 1-4 Front Door Assemblies 14. Paper Release Lever 15. Toner Cartridge Compartment 16. Transfer Roller (do not touch) 17. EP Door 1-8 Product Information
  • HP LaserJet 6L | Service Manual - Page 18
    Figure 1-5 I Product 1 Information Back View of the Printer 18. Power Cable Connector 19. Parallel Cable Connector 20. Memory Expansion Cover Product Information 1-9
  • HP LaserJet 6L | Service Manual - Page 19
    found in Chapter 8 of this manual. Replacement parts may be ordered through HP's Parts Direct Ordering (PDO), or Parts Center Europe (PCE). Ordering Consumables The printer has no consumables other than the toner cartridge, which may be ordered directly from Hewlett-Packard. Refer to Chapter 8 for
  • HP LaserJet 6L | Service Manual - Page 20
    HP LaserJet 5L Printer User's Manual HP LaserJet 6L Printer User's Manual HP PCL5 Printer Language Technical Reference Information Package HP LaserJet Printer Family Paper Specifications Guide LaserJet Basic Hardware Training Course HPLJ 5L and 6L Hardware Training Kit HP LaserJet 6L Printer Service
  • HP LaserJet 6L | Service Manual - Page 21
    www.jpn.hp.com/drivers/. Korea: www.hp.co.kr. Taiwan: www.hp.com.tw, with a local driver website of www.dds.com.tw. HP Bulletin Board Service-Our electronic download service provides convenient access to HP printer drivers, updated HP printer software, product information, and troubleshooting hints
  • HP LaserJet 6L | Service Manual - Page 22
    Assistance (Please refer to the warranty chapter of this manual for additional product repair information.) Post-warranty telephone assistance available for technical support to assist service technicians. The NARC can be reached at 1-800-544-9976. To access this service, HP resellers must have
  • HP LaserJet 6L | Service Manual - Page 23
    . • Use of non-HP toner cartridges (see explanation) or DRAM (JEDIA) memory cards. The use of non-Hewlett-Packard toner cartridges does not affect either the warranty or any maintenance contract purchased from Hewlett-Packard. However, if an HP LaserJet printer failure or printer damage is found to
  • HP LaserJet 6L | Service Manual - Page 24
    be serviced by an authorized repair depot or reseller within the country where the printer was originally purchased. Because of the different specifications and warranty coverage limitations, Hewlett-Packard does not offer a conversion, or support the conversion, of HP LaserJet family printers. We
  • HP LaserJet 6L | Service Manual - Page 25
    1-16 Product Information
  • HP LaserJet 6L | Service Manual - Page 26
    2 Site Requirements Contents Site Requirements 2-3 Operating Environment 2-3 Printer Space Requirements 2-4 The HP C3906A/F Toner Cartridge 2-5 Storage Conditions 2-5 Storing Opened Toner Cartridges 2-5 Toner Cartridge Handling Suggestions 2-6 Site Requirements 2 -1
  • HP LaserJet 6L | Service Manual - Page 27
    2 -2 Site Requirements
  • HP LaserJet 6L | Service Manual - Page 28
    maintained to ensure the proper operation of this printer. Environmental Requirements LaserJet 5L/6L & Cartridge Operating Temperature 50 to 90.5° F (10 this printer. • Install away from direct sunlight, open flames, or ammonia fumes. If the printer is placed near a window, make sure the window
  • HP LaserJet 6L | Service Manual - Page 29
    Table 2-2 Printer Space Requirements Printer Dimensions Description Dimension Width 13.2 in. (335.5 mm) Depth 12.3 in. (311.2 mm) Height (storage) (operational) 8.9 in. (227.5 mm) 14.6 in. (372.7 mm)* Weight (with toner cartridge) 15.9 lbs. (7.2 kg) Toner cartridge weight** 1.5 lbs
  • HP LaserJet 6L | Service Manual - Page 30
    the highest quality and longest life of HP toner cartridges. Keep the printer within the following environmental conditions for optimum performance. Storage Conditions The toner cartridge is affected by its environment. Packaging protects the toner cartridge from light and increases its storage life
  • HP LaserJet 6L | Service Manual - Page 31
    for too long. This causes permanent damage to the photosensitive drum. Replace the cartridge. • Never manually rotate the drum, especially in the reverse directions; internal damage and toner spills may result. • Do not install the toner cartridge in the printer for shipping. 2 -6 Site Requirements
  • HP LaserJet 6L | Service Manual - Page 32
    3 Operating Overview Contents Using the Control Panel 3-3 Control Panel Layout 3-3 LED Lights 3-4 The Front Panel Button 3-6 Printing a Self-Test Page 3-7 Continuous Self Test 3-9 Printing an Engine Test 3-10 Resetting the Printer 3-11 To Reset the Printer 3-11 Operating Overview 3-1
  • HP LaserJet 6L | Service Manual - Page 33
    3-2 Operating Overview
  • HP LaserJet 6L | Service Manual - Page 34
    the Control Panel Control Panel Layout The Control Panel consists of three status lights and a Front Panel Button located at the front of the printer. The Control Panel consists of one button and + three status lights. ERROR (Yellow) DATA (Green) READY (Green) These lights can be in only
  • HP LaserJet 6L | Service Manual - Page 35
    door. Toner cartridge is either missing Install a cartridge, being careful to position it or not installed correctly. correctly. There is paper jammed in the printer. Clear the jam and resume printing. If the Error light remains lit after checking for these problems, and there's no paper jam
  • HP LaserJet 6L | Service Manual - Page 36
    completing the tasks above, see Chapter 7, "Troubleshooting." Memory Error An incompatible memory card has been installed. For memory card specifications, see the HP LaserJet 5L User's Manual, appendix D, or the HP LaserJet 6L User's Manual, page 1-10. The memory card must be a 70 nsec or faster
  • HP LaserJet 6L | Service Manual - Page 37
    . The reset will return the printer to the factory default settings. This clears all data from memory, including any downloaded fonts and macros. The Data (middle) Light blinks. Briefly push and release the Override manual feed to print button. from paper cassette. Error (top) light blinks
  • HP LaserJet 6L | Service Manual - Page 38
    Figure 3-1 Printing a Self-Test Page A self-test page can be useful in troubleshooting printer problems and determining which fonts have been downloaded to the printer. Installation and 3 Configuration Self-test Page for HP LaserJet 5L Operating Overview 3-7
  • HP LaserJet 6L | Service Manual - Page 39
    Figure 3-2 Self-test Page for HP LaserJet 6L The self-test page lists the current printer configuration. (If any fonts have been downloaded to the printer a second page will print.) To print a self-test page: 1 Make sure the Ready (bottom) Light is on, and all other lights are off. Wake up the
  • HP LaserJet 6L | Service Manual - Page 40
    can be useful for troubleshooting paper path and other problems. To print a continuous self test: 1 Disconnect the printer from the power source print at the printer's rated speed of four pages per minute (HP LaserJet 5L) or six pages per minute (HP LaserJet 6L). The engine test prints at the printer
  • HP LaserJet 6L | Service Manual - Page 41
    correctly. The Formatter PCA is completely bypassed during an engine test. Consequently, this test is useful for isolating engine printer problems. The engine test prints a full page of vertical lines down the entire printable area. This page is useful for checking and adjusting registration
  • HP LaserJet 6L | Service Manual - Page 42
    : • Clears all data from the printer's memory (including unprinted data, downloaded fonts, and macros). • Stops any printing that is taking place and ejects the page. • Removes some error conditions. • Resets the printer to its factory default settings. To Reset the Printer Press and hold the Front
  • HP LaserJet 6L | Service Manual - Page 43
    3-12 Operating Overview
  • HP LaserJet 6L | Service Manual - Page 44
    4 Printer Maintenance Contents Life Expectancy of Consumables 4-3 Toner Cartridge Life 4-4 Saving Toner with EconoMode 4-4 Refilled Toner Cartridges 4-5 Recycling Toner Cartridges 4-5 Cleaning the Printer 4-6 Cleaning Printer Components 4-7 Cleaning Spilled Toner 4-8 Printer Maintenance 4-1
  • HP LaserJet 6L | Service Manual - Page 45
    4-2 Printer Maintenance
  • HP LaserJet 6L | Service Manual - Page 46
    components as needed, based on printer failures or wear, not strictly on usage. Life Expectancy of Consumables Description HP LaserJet 5L HP LaserJet 6L Est Life Part Number Part Number (pgs) Remarks Toner Cartridge C3906A (user replaceable) C3906A 2,500* When print becomes faint, shake
  • HP LaserJet 6L | Service Manual - Page 47
    has been designed to simplify the replacement of the printer's major "consumable" parts. The toner cartridge contains the printing mechanism and a supply of toner. When using a typical word-processing application, a toner cartridge will print approximately 2500 pages where the text covers about
  • HP LaserJet 6L | Service Manual - Page 48
    long-term reliability effect on the printer is from using different toner formulations found in refilled cartridges. • Hewlett-Packard has no control over the actual print quality of a refilled toner cartridge. The print quality of HP LaserJet toner cartridges influences the customer's perception of
  • HP LaserJet 6L | Service Manual - Page 49
    WARNING! Cleaning the Printer To maintain the print quality, thoroughly clean the printer: • Every time you change the toner cartridge. • After printing approximately 2,500 pages. • Whenever print quality problems occur. Clean the outside of the printer with a lightly water-dampened cloth. Clean
  • HP LaserJet 6L | Service Manual - Page 50
    To avoid permanent damage to the toner cartridge, do not use ammonia-based cleaners on or around the printer. Do not touch the transfer roller with your fingers. Contaminants on the roller can cause print quality problems. Cleaning Printer Components COMPONENT Outside Covers Inside General
  • HP LaserJet 6L | Service Manual - Page 51
    roller) Cleaning Spilled Toner Defective toner cartridges can develop leaks. In addition, after a paper jam has occurred, there may be some toner remaining on the rollers and guides inside the printer. The pages that print immediately after the jam may pick up this toner. Clean spilled toner with
  • HP LaserJet 6L | Service Manual - Page 52
    11 Image Formation System 5-12 Toner Cartridge 5-13 Step 1: Drum Cleaning 5-13 Step 2: Drum Conditioning 5-13 Step 3: Image Writing 5-13 Step 4: Image Developing 5-14 Step 5: Image Transferring 5-14 Step 6: Image Fusing 5-14 Paper Feed System 5-15 Paper Jam Detection 5-18 Basic Sequence of
  • HP LaserJet 6L | Service Manual - Page 53
    5 - 2 Functional Overview
  • HP LaserJet 6L | Service Manual - Page 54
    This chapter presents a generalized functional overview of the printer and the printing processes. The following printer systems are discussed: • DC Controller System/ Power System • Formatter System • Image Formation System • Paper Feed System • Laser/Scanner System Figure 5-1 is a generalized
  • HP LaserJet 6L | Service Manual - Page 55
    and distribution circuitry. The DC Controller controls the following systems and functions: • Print Engine Control • Laser and Scanner Drive • Paper Motion Photosensors (Paper Out, Paper Registration, and Paper Exit Sensors) • Motor • Power System • AC Power Distribution • DC Power Distribution
  • HP LaserJet 6L | Service Manual - Page 56
    manually through an access hole at the front of the printer. This switch causes the print engine to perform a self-test diagnostic which bypasses the Formatter PCA and prints a full page of black vertical lines. This test is useful for troubleshooting printer problems because it isolates the print
  • HP LaserJet 6L | Service Manual - Page 57
    supply circuitry and to the AC driver circuitry, which controls AC voltage to overcurrent devices in this printer: • Fuse F101 units) provides overcurrent protection to the printer DC power supply circuitry. • In power switch, the printer has a SleepMode function. After the printer has been idle for
  • HP LaserJet 6L | Service Manual - Page 58
    roller according to the instructions from the CPU on the DC Controller PCA. This circuit also controls the image density by changing the primary AC voltage and the developing AC bias according to the setting of the print density dial. High voltage is disabled when the printer's EP Door is open
  • HP LaserJet 6L | Service Manual - Page 59
    System with the Paper Feed System and signals the Formatter to send the print image data. The Formatter sends the print image data (dots) in the form of a VIDEO signal and the printing process begins. The Formatter PCA also provides mounting locations for additional memory. CPU The Formatter
  • HP LaserJet 6L | Service Manual - Page 60
    mounted under the printer cover to communicate printer status to the user. Refer to "Using the Control Panel" in Chapter 3 and "Printer Error Troubleshooting" in Chapter boundaries. REt is user-adjustable from some software applications. Available settings are On or Off. Functional Overview 5 - 9 Functional
  • HP LaserJet 6L | Service Manual - Page 61
    "draft mode," is user-selectable through some software applications. The default setting is Off. Note EconoMode vs Normal Mode EconoMode does not affect print speed or memory usage. Memory Enhancement technology (MEt) The Hewlett-Packard Memory Enhancement technology (Met) effectively doubles the
  • HP LaserJet 6L | Service Manual - Page 62
    page image in page buffer memory before physically moving the paper through the printer. This process ensures that the entire page will be printed. Page Protect applies only to PCL printing. The default setting is Auto. PJL Overview Printer Job Language (PJL) is an integral part of configuration, in
  • HP LaserJet 6L | Service Manual - Page 63
    as electronics, optics, and electrophotographics) to provide a printed page. Each process functions independently and must be coordinated with the other printer processes. Image formation consists of six processes: • Step 1. Drum Cleaning • Step 2. Drum Conditioning • Step 3. Image Writing • Step
  • HP LaserJet 6L | Service Manual - Page 64
    consumed in the replaceable toner cartridge, eliminates the need for a service call when replacement is required. The special photosensitive properties of the drum allow an image to be formed on the drum surface and then transferred to paper. The printer's toner cartridge does not include a light
  • HP LaserJet 6L | Service Manual - Page 65
    on the drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged toner on the drum surface to be attracted to the paper. After separation, the drum is cleaned and conditioned for the next image. Step 6: Image
  • HP LaserJet 6L | Service Manual - Page 66
    Paper Feed System Both the Paper Input Bin and the Single Sheet Input Slot merge into one, main input area. Paper placed in either of these areas enables the Paper Out Sensor (sensor 202), which informs the DC Controller that paper is present. When the printer receives a print job and is ready to
  • HP LaserJet 6L | Service Manual - Page 67
    Figure 5-5 Figure 5-5 shows a simplified paper path and the locations of the photosensors and rollers. Simplified Paper Path 5 - 16 Functional Overview
  • HP LaserJet 6L | Service Manual - Page 68
    Open/Cartridge Sensor (HP LaserJet 5L only) In the HP LaserJet 6L, SW101 performs the functions of 5L's PS204. Detects whether printer door is open and cartridge is in place. If the door is open or the cartridge is not in place, the control panel LEDs will display an error message. Printing cannot
  • HP LaserJet 6L | Service Manual - Page 69
    Exit Sensor (PS201) detect when paper is moving through the printer. (See Figure 5-5 for roller and sensor locations.) If a paper jam is detected, the DC Controller immediately stops the printing process and causes a paper jam indication on the front panel. A paper jam can be detected under any of
  • HP LaserJet 6L | Service Manual - Page 70
    the printer in ready state. Stabilize the photosensitive drum sensitivity in preparation for printing. Also clean the Transfer Roller. Form images on the photosensitive drum based on the /VDO signal from the Formatter and transfer the image to paper. Deliver the last sheet of paper. Also clean the
  • HP LaserJet 6L | Service Manual - Page 71
    Figure 5-7 General Timing Diagram - HP LaserJet 5L 5 - 20 Functional Overview
  • HP LaserJet 6L | Service Manual - Page 72
    Figure 5-8 Functional 5 Overview General Timing Diagram - HP LaserJet 6L Functional Overview 5 - 21
  • HP LaserJet 6L | Service Manual - Page 73
    5 - 22 Functional Overview
  • HP LaserJet 6L | Service Manual - Page 74
    Assembly 6-24 Solenoid 6-25 Pickup Roller Assembly 6-27 Paper Feed Frame 6-30 Transfer Roller Guide & Transfer Roller 6-34 Kick Plate 6-35 Separation Pad 6-37 Subpads 6-38 Feed Assembly 6-39 Bottom Assemblies 6-42 Memory Door Guide 6-42 Motor 6-43 DC Controller 6-44 Formatter Board
  • HP LaserJet 6L | Service Manual - Page 75
    6 - 2 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 76
    this printer can be sharp! Exercise caution when working with the printer. The printer contains parts that are electrostatic discharge (ESD) sensitive. Always service printers at affected assembly. Always remove the toner cartridge before removing or replacing parts. Removal and Replacement 6 - 3
  • HP LaserJet 6L | Service Manual - Page 77
    screwdriver with a magnetic tip • 5.5 mm hexhead nutdriver • small flathead screwdriver • needlenose pliers A Posidriv screwdriver will damage the printer's screw heads. Use Phillips only. Figure 6-1 shows the difference between a Phillips and a Posidriv screwdriver. Note that a Phillips tip
  • HP LaserJet 6L | Service Manual - Page 78
    Push it firmly into the printer. Replace the Memory Expansion Cover, set the printer upright, reinstall the toner cartridge, reinsert paper, and reconnect to the power source. Print a self-test page (see Chapter 3) to check that the printer recognizes the additional memory you have added. Your Total
  • HP LaserJet 6L | Service Manual - Page 79
    Caution Figure 6-2 Covers and Doors Back Cover 1 Unplug the power cord and remove the parallel cable from the back of the printer. 2 Remove the toner cartridge. 3 Lift the Input Extender assembly. You must lift the Input Extender when the covers are removed or it will break. After you have removed
  • HP LaserJet 6L | Service Manual - Page 80
    Removal and 6 Replacement Figure 6-3 5 Separate the rear panel from the main cover, pulling the lower corners away from the printer first. Then, insert the small flathead screwdriver into the openings at the top to pop the upper corners (Figure 6-3, callout 1). 6 Remove the cover by grabbing
  • HP LaserJet 6L | Service Manual - Page 81
    Figure 6-4 EP Door Assembly 1 Unplug the power cord and remove the parallel cable from the back of the printer. 2 Open the EP door. 3 Remove the toner cartridge. 4 Along the door hinge, there is a flex point. Firmly press the left tab inward to release it. The right tab will fall out easily (Figure
  • HP LaserJet 6L | Service Manual - Page 82
    the back of the printer. 2 Remove the toner cartridge. 3 Gently tip the printer onto its side so that the Control Panel is on top. 4 Carefully pull the door tab out (Figure 6-5, callout 1) and away from the printer in a gentle rocking motion (Figure 6-5, callout 2). Memory Door Removal Removal and
  • HP LaserJet 6L | Service Manual - Page 83
    and Paper Input Assembly 1 Remove the toner cartridge. 2 Remove memory door. Remove the memory door first. The door will break if you remove the Main Cover without removing the memory door. 3 Remove the EP Door Assembly. 4 Remove the Back Cover. 5 Remove the (2) screws from the top of the printer
  • HP LaserJet 6L | Service Manual - Page 84
    and 6 Replacement Figure 6-7 Internal Assemblies Control Panel 1 Remove the Printer Covers. 2 Use the needlenose pliers to release the Control Panel 6-7, callout 2). The Control Panel will pop out of the printer chassis. 4 Lift the Control Panel out. Control Panel Removal Removal and Replacement 6 -
  • HP LaserJet 6L | Service Manual - Page 85
    pull inward. This will release the tabs from the printer chassis (Figure 6-8, callout 1). 3 Rotate the tabs 90 degrees, clear of the printer chassis (Figure 6-8, callout 2). 4 Lift the roller opposite side of the printer; this placement would cause paper path problems. 6 - 12 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 86
    2 Remove the EP Right-Hand assembly by pressing the tab in (Figure 6-9, callout 1) and sliding the assembly toward the front of the printer (Figure 6-9, callout 2). The EP Right-Hand assembly must be removed to access any fuser components. Delivery Assembly Removal (1 of 2) Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 87
    (Figure 6-10, callout 1). Once the screws have been removed, rotate the rear of the Delivery Assembly up and forward and lift it out of the printer. Note Delivery Assembly Removal (2 of 2) Upon reinstallation, the tabs on the front end of the Delivery Assembly must fit under the sheet metal fuser
  • HP LaserJet 6L | Service Manual - Page 88
    Removal and 6 Replacement Figure 6-11 Fuser Pressure Plate 1 Remove Printer Covers and Delivery Assembly (Figures 6-9 and 6-10). 2 Remove the (2) screws (Figure 6-11, callout 1). 3 Press the Fuser Plate retainer clips out to release the Pressure Plate (
  • HP LaserJet 6L | Service Manual - Page 89
    Fuser Pressure Plate (Figure 6-12, callout, 2). It is important that the spring is placed over the positioning pin (callout 3) because inadequate pressure will cause fusing problems. Replace the screws. Fuser Pressure Plate Replacement 6 - 16 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 90
    Covers, Delivery Assembly (Figures 6-9 and 6-10), and Fuser Pressure Plate (Figure 6-11). 2 Remove the wire cover (on the right side of the printer) for the Heating Element wires by pressing in on the tab and pulling outward (Figure 6-13, callout 1). Heating Element Removal (1 of 3) Removal and
  • HP LaserJet 6L | Service Manual - Page 91
    Figure 6-14 3 Disconnect the AC voltage to the Heating Element by releasing the connector located on the DC Controller. Press down on the connector release with a small, flathead screwdriver (Figure 6-14, callout 1). (Since this is a small space, it is much easier to reach the connector with a
  • HP LaserJet 6L | Service Manual - Page 92
    Removal and 6 Replacement Figure 6-15 4 Remove the wire from the wire guides along the right-side of the printer. 5 Disconnect the thermistor feedback connector in the left front side of the Fusing Assembly (Figure 6-15). Heating Element Removal (3 of 3) 6 Lift the Heating Element out.
  • HP LaserJet 6L | Service Manual - Page 93
    (Figure 6-16, callout 1) and then rolling it gently backward (Figure 6-16, callout 2). Note Note Pressure Roller Guide Removal 3 Lift the right end of the Pressure Roller up and out of the printer chassis. The right end of the Pressure Roller is greased. 4 The left side will follow easily with the
  • HP LaserJet 6L | Service Manual - Page 94
    and pull it straight out the front of the printer. To reinstall 1 Make sure the lever arm Guide Assembly. The machined ridges on the lever will face you. 4 Release the spring so it falls in place in front of the square tab (Figure 6-17). While the shape of the lever was changed for the HP LaserJet 6L
  • HP LaserJet 6L | Service Manual - Page 95
    the white tab was changed for the HP LaserJet 6L, these procedures for Fuser Exit Roller Assembly removal remain unchanged. Figure 6-18 shows the white tab from an HP LaserJet 5L. 4 Slide the Exit Roller Assembly forward and out to the right of the printer. Fuser Exit Roller Removal 6 - 22 Removal
  • HP LaserJet 6L | Service Manual - Page 96
    Removal and 6 Replacement Caution Note Figure 6-19 Paper Exit Sensor Flag 1 Remove the Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), and Fuser Pressure Plate (Figure 6-11). Before proceeding to Step 2, examine the Paper Exit Sensor flag. It is important to note the position of the
  • HP LaserJet 6L | Service Manual - Page 97
    Note Figure 6-20 Top Assemblies Laser/Scanner Assembly 1 Remove the Printer Covers. 2 Remove both Laser/Scanner connectors (Figure 6-20, callout 1). 3 Remove all (4) screws and lift the assembly straight off (Figure 6-20, callout 2). One of the four
  • HP LaserJet 6L | Service Manual - Page 98
    Removal and 6 Replacement Figure 6-21 Solenoid 1 Remove the Printer Covers. 2 On the left side of the printer, remove the paper pickup gear (Figure 6-21, callout 1) by pressing the tabs in the center of the gear outward and pulling the gear off (Figure 6-21). Solenoid Removal (1
  • HP LaserJet 6L | Service Manual - Page 99
    self-tapping screw that holds the Solenoid in place (Figure 6-22, callout 2). 5 Unthread the wires from the printer chassis. 6 Lift the Solenoid off. Note Solenoid Removal (2 of 2) When reinstalling this part, the Paper Pickup Gear is keyed to go on the shaft in only one way. 6 - 26 Removal and
  • HP LaserJet 6L | Service Manual - Page 100
    roller grounding clip on the right of the printer by lifting each end of the clip up and over the two metal guides and sliding the clip off. Figure 6-23 depicts the clip from an HP LaserJet 5L. The clip from an HP LaserJet 6L (and some HP LaserJet 5Ls) is shaped differently. Pickup Roller Assembly
  • HP LaserJet 6L | Service Manual - Page 101
    turn it counter clockwise to release it (Figure 6-24, callout 2). Pickup Roller Assembly Removal (2 of 2) 5 Lift the bushing out. 6 From inside the front of the printer, slide the right side of the Pickup Roller Assembly forward, then lift the left side out. 6 - 28 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 102
    with the two Idler Roller tabs up, so that they fit into the underside of the metal chassis behind the Laser/Scanner assembly (Figure 6-25). Paper Pickup Roller Assembly Replacement (Inside/Front View) Removal and Replacement 6 - 29
  • HP LaserJet 6L | Service Manual - Page 103
    Figure 6-26 Paper Feed Frame 1 Remove the Printer Covers. 2 Remove the Pickup Roller Assembly (Figures 6-23 Cartridge Sensor on HP LaserJet 5L only (Figure 6-26, callout 2) • Connector from Switch 101 (Figure 6-26, callout 3) • Connector from Front Control Panel (Figure 6-26, callout 4) Paper Feed
  • HP LaserJet 6L | Service Manual - Page 104
    Removal and 6 Replacement Figure 6-27 4 Release the catch on the control panel cable guide by using the small flathead screwdriver to push on the tab (Figure 6-27). Then slide the guide off. Paper Feed Frame Removal (2 of 4) Removal and Replacement 6 - 31
  • HP LaserJet 6L | Service Manual - Page 105
    Figure 6-28 5 Remove the self-tapping screw from the back sheet metal plate and lift it off (Figure 6-28, callout 1). 6 Remove the (4) hex head screws from the Paper Feed Frame (Figure 6-28, callout 2). Paper Feed Frame Removal (3 of 4) 6 - 32 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 106
    that all cables are clear of the frame and pull the frame straight back to remove it. To reinstall The Paper Feed Frame may be easier to reinstall if you place the printer on its front, so that you can apply pressure while putting the screws back in place. Removal and Replacement 6 - 33
  • HP LaserJet 6L | Service Manual - Page 107
    Paper Feed Frame (Figures 6-26 through 6-29). 2 Looking at the back of the printer, note the two small, hook-shaped release tabs on each end of the Transfer Roller guide Some of the HP LaserJet 5L Printers contain a small metal spring under the Transfer Roller Guide. Upon reinstallation with
  • HP LaserJet 6L | Service Manual - Page 108
    Kick Plate, but it is also likely to spring away from the Kick Plate. Place the spring aside for Separation Plate disassembly. 1 Remove the Printer Covers and the Pickup Roller Assembly (Figures 6-23 and 6-24). 2 Press the Separation Pad (Figure 6-31). Allow the Kick Plate to pivot upward (a spring
  • HP LaserJet 6L | Service Manual - Page 109
    the third pin. Use needlenose pliers to place the spring correctly. (See Figure 6-32.) Kick Plate Spring Replacement While rotating the Kick Plate into place, guide the other end of the spring onto the silver grounding plate located on the Paper Feed Frame. 6 - 36 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 110
    6-33 Separation Pad 1 Remove the Printer Covers, Pickup Roller Assembly (Figures 6-23 and 6-24), and Kick Plate (Figure 6-31). 2 Lift the bottom of the white plastic tab on the rear of the Paper Feed Frame up slightly and slide it up, toward the top of the Paper Feed Frame. This will release the
  • HP LaserJet 6L | Service Manual - Page 111
    Note Figure 6-34 Subpads When you replace the Separation Pad, you should also replace the smaller subpads at the same time. 1 Place your index finger on the subpad. 2 Press toward the top of the printer. Subpad Removal 6 - 38 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 112
    Replacement Figure 6-35 Feed Assembly The Feed Assembly is located in the Paper Feed Frame. 1 Remove the Printer Covers, Pickup Roller Assembly (Figures 6-23 through 6-25), and Paper Feed Frame (Figures 6-26 through 6-29). 2 Turn the Paper Feed Frame upside down. 3 Remove the Feed Roller Shaft by
  • HP LaserJet 6L | Service Manual - Page 113
    Step 5, examine the tabs and how they fit into their slots (Figure 6-36, callout 2). The tabs must be reinstalled to exactly this position. 5 Remove the Feed Assembly. Feed Assembly Removal (2 of 3) 6 - 40 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 114
    into your hand (Figure 6-37). Feed Assembly Removal (3 of 3) To reinstall Before securing the screw, ensure the tabs on the Feed Assembly are positioned in their slots on the Paper Feed Frame (Figure 6-35, callout 2). Failure to do so will cause paper feed problems. Removal and Replacement 6 - 41
  • HP LaserJet 6L | Service Manual - Page 115
    Figure 6-38 Bottom Assemblies Memory Door Guide 1 Remove the Printer Covers. 2 Remove any extra memory. 3 Two tabs hold the memory door guide on the printer chassis. Press each tab inward (Figure 6-38). 4 Pull the memory door guide out. Memory Door Guide Removal 6 - 42 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 116
    Removal and 6 Replacement Figure 6-39 Motor 1 Remove the Printer Covers. 2 Remove the motor connector (Figure 6-39, callout 1). 3 Remove the memory door guide to expose the two motor screws. 4 Remove the motor screws (Figure 6-39, callout 2). 5 Lift the Motor out. Motor Removal Removal and
  • HP LaserJet 6L | Service Manual - Page 117
    /PS204 connector (Figure 6-29). 5 Remove the AC Cable cover and disconnect the AC Cable from the DC Controller (Figures 6-13 and 6-14). 6 Tip the printer on its top, with the front facing you. 7 Remove the (4) screws (Figure 6-40, callout 1). One of the screws is a grounding screw. The location of
  • HP LaserJet 6L | Service Manual - Page 118
    Removal and 6 Replacement Caution Figure 6-41 8 Lift the bottom plate, rotating the plate toward you from the back as if hinged on the front. Release the Fusing Assembly connector (J206) (Figure 6-41, callout 1). ESD SENSITIVE! DC Controller Removal (2 of 3) Removal and Replacement 6 - 45
  • HP LaserJet 6L | Service Manual - Page 119
    Figure 6-42 9 Remove the (7) remaining connectors (Figure 6-42, callout 1). 10 Remove the screws (5) that secure the DC Controller to the metal case (Figure 6-42, callout 2). Caution Note DC Controller Removal (3 of 3) 11 Remove the DC Controller by lifting gently on the side opposite the
  • HP LaserJet 6L | Service Manual - Page 120
    Removal and 6 Replacement Caution Figure 6-43 Formatter PCA ESD SENSITIVE! 1 Remove the Printer Covers and complete the DC Controller removal direction up to step 8 (Figures 6-40 and 6-41). 2 Remove the two cable clips (Figure 6-43, callout 1). 3 Remove all (4)
  • HP LaserJet 6L | Service Manual - Page 121
    6 - 48 Removal and Replacement
  • HP LaserJet 6L | Service Manual - Page 122
    Contents General Troubleshooting Flowchart 7-3 Paper Path and Components 7-5 DC Controller Diagram 7-6 Printer Error Troubleshooting 7-7 Priority of Errors 7-7 Printer Status Messages 7-8 Service and Error Messages 7-10 Image Formation Troubleshooting 7-13 Check the Toner Cartridge 7-13
  • HP LaserJet 6L | Service Manual - Page 123
    7-2 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 124
    the Printer Door is firmly closed, and the toner cartridge is installed, but the motor does NOT rotate when AC power is applied to the printer: 1 the Formatter PCA is firmly seated into the DC Controller PCA. 3 Perform an Print Engine Test. (See Figure 7-4.) 4 If the engine test is successful,
  • HP LaserJet 6L | Service Manual - Page 125
    Perform a Front Panel Self Test Refer to the section "Image Formation Troubleshooting," later in this chapter. Is the Self Test image No being printed clearly ? Yes EXIT 7-4 Troubleshooting If the engine test produces a clear print image, yet a Self Test is not generated by initiating the Control
  • HP LaserJet 6L | Service Manual - Page 126
    Fusing Unit Delivery Roller PS201 Paper Exit Sensor Transfer Roller Motor Paper Path and Components Manual Input Slot Paper Input Bin Pick-up Roller SL1 Paper Pick-up Solenoid Feed Sub Roller PS202 Paper Paper PS203 Out Sensor Registration Sensor Feed Roller Troubleshooting 7-5
  • HP LaserJet 6L | Service Manual - Page 127
    FU102 INL101 Paper Registration and Paper-Out Photosensors (PS203 and PS202) Fusing Assembly (thermistor feedback) Scanner Motor Laser Driver/Beam Detect Circuitry Door Open/No Toner Cartridge Photosensor (PS204) (HP LaserJet 5L only) Motor 110 volt only Input Power Receptacle 7-6 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 128
    Printer messages are categorized into two basic types: • Status Messages • Service and Error Messages Before troubleshooting the printer, cycle the power to the printer errors is: 1 Service Errors 2 Door Open/No Toner Cartridge 3 Paper Jam 4 Paper Out 5 Memory Error 6 Manual Feed Troubleshooting 7-7
  • HP LaserJet 6L | Service Manual - Page 129
    your HP LaserJet 5L User's Manual or the HP LaserJet Printer Family Paper Specifications Guide for more information.) 2. Press and release the Front Panel Button. 3. Turn off manual feed within your software application if you do not wish the printer to pause between sheets. 7-8 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 130
    you may add paper, close the printer door, add the toner cartridge, and clear a paper jam, only to find that the printer still displays an error message. If this happens, troubleshoot using Table 7-3 below. If the error appears and persists only after you attempt to print a page, verify that
  • HP LaserJet 6L | Service Manual - Page 131
    is pressed.) Use Table 7-4, "Service and Error Messages," to identify what type of service error has occurred. Service and Error Messages (1 of 3) 2. Unplug the printer, remove any optional memory, then power the printer back on. If the message clears, replace the memory card. 3. 10 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 132
    7 Troubleshooting Table 7-4 LEDs Heating Element Resistance Check Service and Error Messages (Continued 2 of 3 ) Description Recommended Action Beam Error. There are a number of causes for this error, and some of the causes may be transient. (They may disappear.) 1. Power-cycle the printer by
  • HP LaserJet 6L | Service Manual - Page 133
    error code. Contact HP technical support with this information as well as a description of what data was sent, the errors encountered prior to the firmware error, the condition of the printer prior to the error, and any other information that may help isolate the error. 7-12 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 134
    are many times the result of toner cartridge problems. If there is any doubt, always replace the toner cartridge before troubleshooting image defects. Use the following check list to ensure that the toner cartridge is still operable. • Ensure that the toner cartridge is seated properly in the cavity
  • HP LaserJet 6L | Service Manual - Page 135
    the toner, or replace the cartridge. • The paper may not meet HP's paper specifications (for example, too moist or too rough). (See the HP LaserJet 5L User's Manual or the HP LaserJet Printer Family Paper Specifications Guide.) • Adjust toner density setting through your software or printer driver
  • HP LaserJet 6L | Service Manual - Page 136
    streaks or smears can appear. • The toner cartridge may not be installed properly. Remove the cartridge and reinsert it. • The toner cartridge may be defective. Replace it. • If the printer still has print quality problems, the printer may require cleaning. • Replace the heating element. Repetitive
  • HP LaserJet 6L | Service Manual - Page 137
    , try adjusting the print density through your software or printer driver. • If this problem occurs on the back of a printed page, it may be caused by spilled toner inside the printer. See "Cleaning Your Printer" in Chapter 4. Black Page A page is completely black. • The toner cartridge may not be
  • HP LaserJet 6L | Service Manual - Page 138
    's Manual or the HP LaserJet Printer Family Paper Specifications Guide.) • Turn the paper over. • Use the Front Output Slot by pushing the Paper Path Lever to the lower position. This provides the straightest paper path. • Use Paper Input Support located behind the Paper Input Tray. Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 139
    the toner density setting through your software or printer driver. • There may be discontinuities in the high-voltage contact points. Clean the high voltage contact points on the toner cartridge and transfer roller. • Replace the Laser/Scanner unit. • Replace the DC Controller. 7-18 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 140
    7 Troubleshooting Dots • Clean the static charge eliminator. (See Chapter 4, "Printer Maintenance.") • There may be discontinuities in the high-voltage contact points. Clean the high voltage contact points on the toner cartridge and transfer roller. • Replace the transfer roller. Dirt on the Back
  • HP LaserJet 6L | Service Manual - Page 141
    Distorted Image or BD Failure • Make certain the printer is not facing the sunlight. • The paper may not meet HP's paper specifications. Select different paper. • Clean the Laser/Scanner Assembly by blowing compressed air in the slot on the bottom of the assembly. • Make sure the two Laser/Scanner
  • HP LaserJet 6L | Service Manual - Page 142
    7 Troubleshooting Figure 7-4 Troubleshooting Checks Engine Test The engine test print is used to verify that the print engine is functioning correctly. The Formatter PCA is completely bypassed during an engine test, so this test is useful for isolating printer problems. The engine test prints a
  • HP LaserJet 6L | Service Manual - Page 143
    self test. 2 Open the Printer Door after the paper advances half-way through the printer (about 8 seconds after the Motor begins rotation). The leading edge of the paper should have advanced past the toner cartridge. 3 Remove the toner cartridge. 4 Open the toner cartridge's drum shield to view the
  • HP LaserJet 6L | Service Manual - Page 144
    drum, located in the toner cartridge, must rotate for the print process to work. The photosensitive drum receives its drive from the Main Drive assembly. To verify whether the drum is rotating: 1 Open the Printer Door. 2 Remove the toner cartridge. 3 Mark the cartridge's drive gear with a felt
  • HP LaserJet 6L | Service Manual - Page 145
    corroded and that the spring-loading action is functional. If the pins are dirty, clean using alcohol only; if damaged, replace the High Voltage Connector Assembly. Toner Cartridge High Voltage Connection Points (1 of 2) • Charging (1) • Drum Ground (2) • Developing Roller (3) 7-24 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 146
    7 Troubleshooting Figure 7-6 Toner Cartridge High Voltage Connection Points (2 of 2) • Charging (1) • Drum Ground (2) • Developing Roller (3) Troubleshooting 7-25
  • HP LaserJet 6L | Service Manual - Page 147
    to lessen its impact, as suggested in the following table. Paper Curl Troubleshooting Possible Cause Recommended Action Paper Path Try using the front output slot to shorten and straighten the paper path. Paper Surface The recommended printing surface of the page is usually marked on the end
  • HP LaserJet 6L | Service Manual - Page 148
    of the Laser/Scanner assembly. For both HP LaserJet 5L and 6L Printers: Press SW101 (Figure 7-7, callout 3). Overriding PS204 and SW101 3 While holding the flags up, perform either an Engine Test or a Self Test to observe paper motion. (See procedures earlier in this chapter.) Troubleshooting 7-27
  • HP LaserJet 6L | Service Manual - Page 149
    Figure 7-8 Repetitive Image Defect Ruler Repetitive Image Defect Ruler 7-28 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 150
    Main Wiring Diagram 7 Troubleshooting Figure 7-9 Main Wiring Diagram Troubleshooting 7-29
  • HP LaserJet 6L | Service Manual - Page 151
    Motor Drive Signal Motor Drive Signal Motor Drive Signal 5L only Solenoid SL1 Pickup Drive (5L only) "L" when PS202 detects paper "L" when PS203 detects paper Scanner tachometer pulses "L" to rotate scanner motor Scanner clock reference APC sample hold Laser Enable Laser Drive Signal Beam Detect
  • HP LaserJet 6L | Service Manual - Page 152
    pin 3 J305 pin 1 J305 pin 2 J305 pin 3 J206 pin 1 J206 pin 2 J102 pin 1 J102 pin 2 Signal Name DOSNS +12A V N/U +12 V FRSTH FG Remarks "H" when cartridge is not installed or the front door is open at PS204. Fusing temperature feedback Fusing assembly drive voltage Fusing assembly drive voltage
  • HP LaserJet 6L | Service Manual - Page 153
    7-32 Troubleshooting
  • HP LaserJet 6L | Service Manual - Page 154
    8 Parts and Diagrams Contents How to Use the Part Lists and Diagrams 8-3 Ordering Parts 8-3 Ordering Consumables 8-4 Accessories and Supplies 8-5 Common Hardware 8-6 Parts and Diagrams 8-1
  • HP LaserJet 6L | Service Manual - Page 155
    8-2 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 156
    800-227-8164 (U.S. Only) Hewlett-Packard Co. Support Materials, Europe Wolf-Hirth Strasse 33 D-7030 Böblingen, Germany (49 7031) 14-2253 You can also contact HP at 916-783-0804 to find out part numbers for the LaserJet 5L and 6L. Contact your local HP Parts Coordinator for other local phone numbers
  • HP LaserJet 6L | Service Manual - Page 157
    on Table 8-1 may be ordered from Hewlett-Packard. The phone numbers are: U.S.: 1-800-538-8787 Canada: 1-800-387-3154 (Toronto) 516-671-8383 United Kingdom: 0734-441212 Germany: 0130-3322 Contact your local HP Parts Coordinator for other local phone numbers. Parts that have no reference designator or
  • HP LaserJet 6L | Service Manual - Page 158
    upgrades Parallel cable (IEEE 1284) Product Number Description C3906A Replacement toner cartridge. 1 MByte - C3939A 2 MByte - C3938A 4 MByte - C3148A You can upgrade to a total of 9 MBytes of memory in the HP LaserJet 5L/6L. C2950A 2 meter, A to B C2951A 3 meter, A to B You can upgrade to
  • HP LaserJet 6L | Service Manual - Page 159
    Table 8-2 Common Hardware Common Fasteners Used in the Printer Example Description Screw, Machine, Trus Head M3x4, M3x6, M3x8 Screw, Star, 3x6 Screw, Self-tap, 4x10 Screw, Hex-head, 3x8 Screw, Hexhead, 3x6,m 3x8, 3x10 8-6 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 160
    Figure 8-1 Parts and 8 Diagrams Major Assembly Locations Parts and Diagrams 8-7
  • HP LaserJet 6L | Service Manual - Page 161
    Figure 8-2 Covers and Doors 8-8 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 162
    4A 5 6 7 8 8B 9 10 11 13 14 501 502 LaserJet 5L Part No. LaserJet 6L Part No. RB1-7211-000CN RB2-1637-000CN RB1-7212-000CN RB2-1638- Door Assembly 1 Nameplate 1 Input Assembly 1 1 Input Assembly 2 2 Screw RS, M3x8 1 Memory Door 1 Output Tray Fin 2 Screw, Tp, PH, M4x10 2 Screw, Tp, M3x8
  • HP LaserJet 6L | Service Manual - Page 163
    Figure 8-3 Internal Components (1 of 3) 8-10 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 164
    Table 8-4 Internal Components (1 of 3) Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 RY7-5005-000CN Gear Case 6 RY7-5007-000CN RY7-5007-000CN 1 Fuser Release Kit 7 RH7-1282-000CN RH7-1320-000CN 1 Main Motor 8 RY7-5006-000CN RY7-5036-000CN 1 Gear Kit #2 16 RG5-1984-
  • HP LaserJet 6L | Service Manual - Page 165
    Figure 8-4 Internal Components (2 of 3) 8-12 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 166
    -7401-007CN RB1-7176-000CN RB1-7305-000CN XB4-7401-007CN 502 XB1-1300-807CN XB1-1300-807CN Qty Description 1 Memory Door Guide 1 Fuser Paper Guide 1 AC Cable Cover 1 Back Sheet Metal 1 Control Panel Cable Guide 1 Fuser Cable Guide 1 Cap 1 Cap 6 Screw, RS, M3x8 2 Screw, RS, M3x8 (with star washer
  • HP LaserJet 6L | Service Manual - Page 167
    Figure 8-5 Internal Components (3 of 3) 8-14 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 168
    Parts and 8 Diagrams Table 8-6 Internal Components (3 of 3) Ref LaserJet 5LPart No. LaserJet 6LPart No. 1 RB1-7223-000CN RB1-7223 Hand Guide #2 1 Pressure Roller 1 Fuser Pressure Plate 1 Transfer Roller Guide 1 Transfer Roller 1 Case Ground Metal 1 EP Right Hand Guide #1 1 EP Left Hand Guide 1
  • HP LaserJet 6L | Service Manual - Page 169
    Figure 8-6 DC Controller/Formatter and Cables 8-16 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 170
    Table 8-7 DC Controller Case Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 RG5-2024-000CN RB2-1719 XA9-0828-000CN XA9-0828-000CN 1 Screw, WStar 8 RG5-2029-000CN RG5-2029-000CN 1 Paper Pickup Cable 9 RG5-2031-000CN RG5-3662-000CN 1 Door Sensor Cable 10 RG5-2032-000CN
  • HP LaserJet 6L | Service Manual - Page 171
    Figure 8-7 Pickup Roller Assembly 8-18 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 172
    Table 8-8 Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description 1 RB1-7177-000CN RB1-7177-000CN 1 Paper Feed Frame 2 RY7-5008-000CN RY7-5008-000CN 1 Separation Pad Assembly 3 RY7-5009-000CN RY7-5009-000CN 1 Input Sensor Assembly 4 RG5-1951-000CN RG5-3486-000CN 1
  • HP LaserJet 6L | Service Manual - Page 173
    Figure 8-8 Feed Assembly 8-20 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 174
    Table 8-9 Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description RG5-1942-000CN RG5-3485-000CN 1 Feed Assembly 9 RB1-7226-000CN RB2-1699-000CN 1 Idler Roller Parts and 8 Diagrams Parts and Diagrams 8-21
  • HP LaserJet 6L | Service Manual - Page 175
    Figure 8-9 Separation Guide Assembly 8-22 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 176
    Table 8-10 Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description RG5-2013-000CN RG5-3475-000CN 1 Separation Guide Assembly 2 RB1-7276-000CN RG5-3476-000CN 1 Face-Up/Face-Down Lever 4 RB1-7289-000CN RB2-1690-000CN 1 Fuser Roller Bushing 7 RF5-1522-000CN RF5-
  • HP LaserJet 6L | Service Manual - Page 177
    Figure 8-10 Delivery Assembly 8-24 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 178
    Table 8-11 Ref LaserJet 5L Part No. LaserJet 6L Part No. Qty Description RG5-2012-000CN RG5-3474-000CN 1 Delivery Assembly 1 RB1-7284-000CN RB1-7284-000CN RG5-3478-000CN 2 Spur Assembly Inside 8 RB1-7334-000CN RB1-7334-000CN 1 JP Protector Parts and 8 Diagrams Parts and Diagrams 8-25
  • HP LaserJet 6L | Service Manual - Page 179
    8-26 Parts and Diagrams
  • HP LaserJet 6L | Service Manual - Page 180
    A Parts Index Parts Index A-1
  • HP LaserJet 6L | Service Manual - Page 181
    Guide RB1-7343-000CN Control Panel PCA Assembly RG5-2028-000CN Control Panel PCA Cable (5L) RG5-2036-000CN Control Panel PCA Cable (6L Cable (5L) RG5-2031-000CN Door Sensor Cable (6L) RG5-3662-000CN A-2 Parts Index Fig. Ref. 8-4 3 8-2 3 8-2 3 8-7 7 8-4 4 8-4 7 8-4 8 8-5 8
  • HP LaserJet 6L | Service Manual - Page 182
    6L) Feed Assembly (5L) Feed Assembly (6L) Flag Flag Spring Formatter Shield (5L) Formatter Shield (6L) Formatter (Exchange) (5L) Formatter (New) (5L) Formatter (New) (6L Fuser Cable Guide Fuser Connector Fuser Exit Roller Assembly (5L) Fuser Exit Roller Assembly (6L) Fuser Paper Guide Part No. RG5-
  • HP LaserJet 6L | Service Manual - Page 183
    Sensor Assembly JP Protector Kick Plate Spring Laser Cable (5L) Laser\Scanner (Exchange) (5L) Laser\Scanner (New) (5L) Laser\Scanner (New) (6L) Left Leg Part No. RF5-1517-000CN RY7-5007-000CN RB1-7105-000CN RB1-7289-000CN RB2-1690-000CN RY7-5005-000CN RY7-5006-000CN RY7-5036-000CN
  • HP LaserJet 6L | Service Manual - Page 184
    Motor (6L) Memory Door (5L) Memory Door (6L) Memory Door Guide Motor Cable Mylar Guide Nameplate (5L) Nameplate (6L) Output Extender 1 (5L) Output Extender 1 (6L) Output Extender 2 (5L) Output Extender 2 (6L) Output Tray Fin Paper Feed Frame Paper Kick Plate (5L) Paper Kick Plate (6L) Paper Pickup
  • HP LaserJet 6L | Service Manual - Page 185
    ) Spur Assembly Outside (5L) Spur Assembly Outside (6L) Thermistor Cable Transfer Guide Assembly (5L) Transfer Guide Assembly (6L) Transfer Roller Transfer Roller Guide (5L) Transfer Roller Guide (6L) Part No. XA9-0724-000CN XA9-0855-000CN XB1-1300-807CN XA9-0267-000CN XA9-0824-000CN XA9-0686-000CN
  • HP LaserJet 6L | Service Manual - Page 186
    Table A-2 Numerical Parts Index Part No. C3941-69001 C3941-69002 6L) 8-6 2 Pressure Roller Grease 8-5 Fuser Release Tab 8-3 3 Gear Plate (5L) 8-3 4 Front Gear Case 8-3 5 Memory Door Guide 8-4 1 Case Ground Metal 8-5 8 Fuser Cable Guide 8-4 6 Mylar Guide 8-4 11 Paper Feed
  • HP LaserJet 6L | Service Manual - Page 187
    2 (6L) Memory Door (6L) Nameplate (6L) Face-up/Face-down Switch (6L) Delivery Roller #2 (6L) Fuser Roller Bushing (6L) Output Extender 1 (6L) Output Extender 2 (6L) EP Door Chimney (6L) Idler Roller (6L) Formatter Shield (6L) Paper Kick Plate (5L) EP Door Assembly (5L) Back Sheet Metal A-8 Parts
  • HP LaserJet 6L | Service Manual - Page 188
    Table A-2 Numerical Parts List (continued) Part No. RF5-1514-000CN RF5-1515-000CN Transfer Roller Guide (5L) PR Ground Guide Transfer Roller EP Door Assembly (6L) Transfer Roller Guide (6L) Pressure Roller (6L) Exit Roller (6L) Fuser Exit Roller Assembly (6L) Paper Kick Plate (6L) Feed Assembly (5L
  • HP LaserJet 6L | Service Manual - Page 189
    -000CN RH7-1320-000CN RH7-5139 6L) Transfer Guide Assembly (6L) EP/Cover Interlock (6L) Heating Element (110 V) (6L) Heating Element (220 V) (6L) Delivery Assembly (6L) Separation Guide Assembly (6L) Face-up/Face-down Shaft (6L) Spur Assembly Inside (6L) Spur Assembly Outside (6L) Feed Assembly (6L
  • HP LaserJet 6L | Service Manual - Page 190
    Parts List (continued) Part -0824-000CN XA9-0828-000CN XA9-0855-000CN XA9-0890-000CN XB1-1300-807CN XB4-7401-007CN XB4-7401-007CN XB6-7300-607CN XB6-7300- Pad Kit Input Sensor Assembly Gear Kit #2 (6L) Fuse 101 (110 V) Fuse 101 (220 V) Fuser Connector Screw (6L) Screw Screw (DC Controller PCA) (5L
  • HP LaserJet 6L | Service Manual - Page 191
    A-12 Parts Index
  • HP LaserJet 6L | Service Manual - Page 192
    within protective housings and external covers, the laser beam cannot escape during any phase of normal user operation. Never operate or service the printer with the protective cover removed from the Laser/Scanner Assembly. The reflected beam, although invisible, can damage your eyes. Regulatory
  • HP LaserJet 6L | Service Manual - Page 193
    Laser Statement (Finland) The following applies to printer operation and servicing in Finland. LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet(s) 4V and 4MV laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite. Normaalissa käyt"ssä kirjoittimen suojakotelointi
  • HP LaserJet 6L | Service Manual - Page 194
    for the HP C3906A toner cartridges by fax, call HP ASAP (Automated Support Access Program) at 1-800-333-1917 and follow the instructions for using the HP FIRST fax service. See "Technical Assistance" in chapter one for more information on the HP FIRST service. Ozone Emission These printers do not
  • HP LaserJet 6L | Service Manual - Page 195
    , if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there Hewlett-Packard could void the user's authority to operate this equipment. Use of a shielded interface cable is required to comply within the Class B limits in Part
  • HP LaserJet 6L | Service Manual - Page 196
    LaserJet 5L Printer Fuser Accordion Jams To Be Performed By: HP-Authorized personnel or Customer Parts required: RB1-7332-000CN output tray fin General Description: Under some conditions the paper can be pushed back down into the fuser. This results in a paper jam in the fuser area. The paper jam
  • HP LaserJet 6L | Service Manual - Page 197
    printer must be disassembled. Fusers and pressure rollers should be checked for damage from the paper jam or the customers attempts to remove the paper jam. The output tray fin should be installed in all LaserJet 5L's in the affected serial number range that are returned for any service, paper jam
  • HP LaserJet 6L | Service Manual - Page 198
    CNVM000000 / CNVM175233 CNVN000000 / CNVN189964 LaserJet 5L Printer Fuser Jam Clearing Countermeasure To Be Performed By: HP-Authorized Personnel Parts required: RB1-7334-000CN JP (Jam Prevention) Protector General Description: When a paper jam occurs in the LaserJet 5L it will commonly occur
  • HP LaserJet 6L | Service Manual - Page 199
    be checked for damage from the paper jam or the customer's attempts to remove the paper jam. See chapter 6 in the service manual for disassembly instructions. This JP protector and the output tray fin (from service note C3941A-01) should be installed in all LaserJet 5L's in the affected serial
  • HP LaserJet 6L | Service Manual - Page 200
    15 HPD, HP's Distribution Center 1-11 I identification, labels 1-4 identification, printer 1-4 image defects 7-28 image developing 5-12, 5-14 image formation system block diagram 5-12 DC controller 5-8 described 5-12 features 5-12 toner cartridge 5-13, 7-13 image formation troubleshooting 7-13 image
  • HP LaserJet 6L | Service Manual - Page 201
    job language, PJL 5-11 printer message troubleshooting 7-7 printer messages control panel 7-8 error 7-8 manual feed 7-7 memory error 7-7 paper out 7-7 Ready 7-8 self test 7-8 status 7-8 toner cartridge 7-7 troubleshooting 7-7 printer space requirements 2-4 printer timing 5-19 INTR 5-19 LSTR 5-19
  • HP LaserJet 6L | Service Manual - Page 202
    print quality problems 7-14 space requirements 2-4 specifications electrical 1-6 paper 1-11 printer 1-6, 2-3 staining 7-14 standard interfaces 1-3 standard printer memory 1-3 status messages door open or no EP cartridge 7-8 incompatible memory card 7-8 manual feed 7-8 memory error 7-8 paper jam
  • HP LaserJet 6L | Service Manual - Page 203
    Index warning messages 6-3 warranty exclusions 1-14 limitations 1-15 start date 1-15 voltage 1-15 warranty 1-14 wiring diagram 7-29 wiring diagrams, main 7-29 writing process 5-13 Index-4
  • HP LaserJet 6L | Service Manual - Page 204
    Printed on Recycled Paper Copyright© 1997 Hewlett Packard Co. Printed in USA 9/97 Manual Part No. C3990-90991 *C3990-90991* *C3990-90991* C3990-90991
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HP LaserJet 5L and 6L Printer
Service Manual
HP LaserJet 5L and 6L Printer (C3941/C3990) Service Manual