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HP LaserJet 1022, 1022n, 1022nw
Service Manual

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   Summary of Contents for HP LaserJet 1022

  • Page 1

    HP LaserJet 1022, 1022n, 1022nw Service Manual...

  • Page 3

    HP LaserJet 1022 series printers Service Manual...

  • Page 4: Table Of Contents

    1 Product Information Product configurations..........................2 HP LaserJet 1022 printer.......................2 HP LaserJet 1022n printer.....................2 HP LaserJet 1022nw printer....................2 Overview of product..........................3 HP LaserJet 1022 series printers..................3 Model and serial numbers.....................5 Hardware description......................5 Firmware description ......................5 Product specifications..........................6 Physical specifications......................6 Printer performance.......................6 Environmental specification....................6...

  • Page 5: Table Of Contents

    Formatter system..........................43 Central processing unit .......................43 RAM.............................43 USB interface........................43 Control panel........................43 Draft mode (EconoMode)....................43 HP Memory Enhancement technology (MEt)..............44 Enhanced I/O ........................44 Printer operation...........................45 Engine control system (engine control unit and power assembly)........46 Printer-engine-control system................46 Printer laser/scanner unit ...................47 Power system on the engine-power assembly............48 Image-formation system......................49...

  • Page 6: Table Of Contents

    5 Removal and replacement Removal and replacement strategy......................58 Required tools ........................58 Before performing service....................58 Print cartridge ........................59 Parts removal order ......................60 User-replaceable parts ........................61 Replacing the pickup roller ....................61 Replacing the separation pad .....................64 Replacing the main input tray (paper-pickup tray assembly) ..........66 Replacing the output-bin extension (delivery-tray assembly) ..........67 Covers..............................68 Right-side cover........................68...

  • Page 7: Table Of Contents

    Repetitive-image-defect ruler.....................117 Circuit diagram ........................118 Solenoid, sensors, switches, and motor.....................119 7 Parts and diagrams Ordering parts and supplies.......................122 Parts..........................122 Related documentation and software................122 Parts that wear ........................122 Accessories and consumables......................123 Accessories........................123 Common hardware ......................124 How to use the parts lists and diagrams................125 Printer exchange/parts........................126 External covers and panel........................128 Internal components...........................130...

  • Page 8: Table Of Contents

    List of tables Table 1-1 Physical specifications........................6 Table 1-2 Performance............................6 Table 1-3 Environmental specifications ......................6 Table 1-4 Power requirements........................7 Table 1-5 Power consumption (average, in watts)..................7 Table 1-6 Acoustic emissions..........................7 Table 2-1 Media sizes...........................16 Table 3-1 Life expectancies of parts that wear....................24 Table 4-1 Basic sequence of operation......................55 Table 6-1...

  • Page 9

    viii ENWW...

  • Page 10: List Of Figures

    List of figures Figure 1-1 Front and right-side view.........................3 Figure 1-2 Back and left-side view........................4 Figure 1-3 Model- and serial-number label.......................5 Figure 2-1 Dimensions of product........................14 Figure 2-2 Control-panel lights and buttons....................15 Figure 3-1 Main input tray..........................35 Figure 3-2 Output-bin extension........................36 Figure 4-1 Basic configuration........................42 Figure 4-2...

  • Page 11

    Figure 5-26 Remove the fuser (fixing) assembly (2 of 2).................83 Figure 5-27 Remove the paper pickup assembly.....................84 Figure 5-28 Remove the ECU assembly (1 of 6)....................85 Figure 5-29 Remove the ECU assembly (2 of 6)....................86 Figure 5-30 Remove the ECU assembly (3 of 6)....................86 Figure 5-31 Remove the ECU assembly (4 of 6)....................87 Figure 5-32...

  • Page 12: Product Information

    Product Information This chapter provides general product information for HP LaserJet 1022 series printer. ● Product configurations ● Overview of product ● Product specifications ● Extended warranty ● Print-cartridge information ● Regulatory information ENWW...

  • Page 13: Product Configurations, Hp Laserjet 1022 Printer, Hp Laserjet 1022n Printer, Hp Laserjet 1022nw Printer

    HP LaserJet product. The following sections describe the configurations of the HP LaserJet 1022 series printers. HP LaserJet 1022 printer The HP LaserJet 1022 (HP LJ 1022) is the base model of the HP LaserJet 1022 series printers. It offers the following features: ■...

  • Page 14: Overview Of Product, Hp Laserjet 1022 Series Printers

    Overview of product HP LaserJet 1022 series printers Figure 1-1 Front and right-side view Output bin Input-tray cover 250-sheet main input tray Priority feed slot Output-media support Print-cartridge door button ANCEL button light light EADY light TTENTION light (HP LJ 1022nw printer only)

  • Page 15

    Figure 1-2 Back and left-side view Internal network port (HP LJ 1022n and HP LJ 1022nw printers only) USB port Power receptacle On/off switch Separation pad Chapter 1 Product Information ENWW...

  • Page 16: Model And Serial Numbers, Hardware Description, Firmware Description

    Model- and serial-number label Hardware description The HP LaserJet 1022 series printers provide ProRes technology for 1200 dpi resolution. The product prints at 19 ppm for letter-size paper and 18 ppm for A4-size paper. With 1200 dpi printing, the product has exceptional text and graphics print quality. The simple control panel and improved paper handling make this product very easy to use.

  • Page 17: Product Specifications, Physical Specifications, Printer Performance, Environmental Specification, Table 1-1 Physical Specifications, Table 1-2 Performance

    Product specifications This section details the specifications for the HP LaserJet 1022 series printers. Physical specifications Table 1-1 Physical specifications Model Height Depth Width Weight HP LaserJet 1022 series printers 241 mm (9.5 245 mm (9.6 370 mm (14.6 6.3 kg (13.9 lb)

  • Page 18: Electrical Specifications, Acoustic Emissions, Table 1-4 Power Requirements, Table 1-5 Power Consumption (average, In Watts)

    Configuration tested: HP LaserJet 1022 printer using the standard tray, A4 paper, and simplex, continuous printing. HP LaserJet 1022 printer print speed is 19 ppm (letter size) and 18 ppm (A4 size). During other operations, acoustic emissions might vary.

  • Page 19: Extended Warranty

    HP device and for all HP-supplied internal components. This hardware maintenance can uplift the standard warranty, for example, from next-day to same-day service, or extend it up to 5 years. The HP Care Pack can provide Express Exchange or onsite service. For more information, see the support flyer that came with the device for the appropriate phone numbers and information.

  • Page 20: Print-cartridge Information, Refilled Print Cartridges, Recycling Print Cartridges

    Hewlett-Packard has no control or process to ensure that a refilled cartridge functions at the high level of reliability of a new HP LaserJet print cartridge. Hewlett-Packard also cannot predict the long- term reliability effect on the product from using the different toner formulations that are found in refilled cartridges.

  • Page 21: Regulatory Information, Fcc Compliance, Canadian Doc Regulations, Korean Emi Statement

    Regulatory information FCC compliance This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 22: Laser Statement For Finland

    LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet 1022, HP LaserJet 1022n, HP LaserJet 1022nw -laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen ulkopuolelle. Laitteen turvallisuusluokka on määritetty standardin EN 60825-1 (1994) mukaisesti.

  • Page 23

    Chapter 1 Product Information ENWW...

  • Page 24: Installation And Operation

    Installation and Operation This chapter provides an overview of the appropriate operating environment, describes the control panel, describes media requirements, and describes how to load print media. ● Operating environment ● Identifying the control-panel components ● Media specifications ● Guidelines for using media ●...

  • Page 25: Operating Environment

    Operating environment Place the product on a sturdy, level surface in a well-ventilated area that meets the following environmental requirements: ■ Temperature: 10° to 32.5°C (50° to 90.5°F) ■ Humidity: 20 to 80% relative humidity (no condensation) ■ Away from direct sunlight, open flames, and ammonia fumes ■...

  • Page 26: Identifying The Control-panel Components

    Indicates that the input tray is empty, print-cartridge door is open, print cartridge is missing, or other errors. TTENTION light: (HP LJ 1022nw printer only) When the wireless light is on solid, a wireless connection has been IRELESS established. When the wireless light is off, wireless operation is disabled. When the wireless light is flashing, the product is trying to establish a wireless connection.

  • Page 27: Media Specifications, Supported Media Sizes, Table 2-1 Media Sizes

    Media should conform to the guidelines in the user guide. Media that does not meet HP guidelines might cause poor print quality, increased media jams, or premature wear on the product, which might require printer repair.

  • Page 28: Guidelines For Using Media, Paper And Transparencies, Common Media Problems Table, Labels

    Guidelines for using media HP LaserJet printers produce documents that have excellent print quality. They can print on a variety of media types, such as paper (including up to 100% recycled fiber content paper), envelopes, labels, transparencies, and custom-sized media.

  • Page 29: Envelopes, Envelopes With Double-side Seams, Envelopes With Adhesive Strips Or Flaps

    ■ Condition: Do not use labels with wrinkles, bubbles, or other indications of separation. Never use a sheet of labels that has already been run through the printer. Envelopes Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers but also within a box from the same manufacturer.

  • Page 30: Card Stock And Heavy Media, Card-stock Construction, Card-stock Guidelines

    Card stock and heavy media For optimum performance, do not use paper heavier than 157-g/m (42-lb). Paper that is too heavy might cause misfeeds, stacking problems, jams, poor toner fusing, poor print quality, or excessive mechanical wear. Card-stock construction ■ Smoothness: 135- to 157-g/m (36- to 42-lb) card stock should have a smoothness rating of 100 to 180 Sheffield.

  • Page 31: Loading Media, Main Input Tray, Priority Feed Slot, Specific Types Of Media

    Loading media Loading media in the HP LaserJet 1022 series printers is simple and straightforward. This section describes loading bulk media to print. Main input tray The main input tray holds up to 250 sheets of 75-g/m (20-lb) paper or a 25 mm (0.98 inch) stack of heavier media.

  • Page 32: Setting Media Types, Set The Media Type

    Setting media types Use the procedure in this section to select the correct type of media for the print job. An incorrect media type setting might cause image-quality problems. Set the media type Open the Printer Properties dialog box. Click Printer Preferences. Select the correct media type from the Type Is drop down menu.

  • Page 33

    Chapter 2 Installation and Operation ENWW...

  • Page 34

    Maintenance This chapter describes the life expectancy of parts that wear, printer cleaning, printer maintenance, and the replacement of user-replaceable parts. ● Life expectancies of parts that wear ● Cleaning the product ● User-replaceable parts ● Jams ENWW...

  • Page 35: Life Expectancies Of Parts That Wear, Table 3-1 Life Expectancies Of Parts That Wear

    Can affect print quality and paper movement Fuser assembly (220-240 V) RM1-2050-030CN 50,000 pages Can affect print quality and paper movement HP LJ 1022 printer 110 V Q5912-67056 (replacement) 50,000 pages Maximum life Q5912-69056 (refurbished) Q5912-67001 (exchange engine w/formatter) HP LJ 1022n printer 110 V...

  • Page 36

    Table 3-1 Life expectancies of parts that wear (continued) Description Part number Life (estimated) Remarks Q5913-67002 (exchange engine w/formatter) HP LJ 1022nw printer 220 V Q5914-67055 (replacement) 50,000 pages Maximum life Q5914-69055 (refurbished) Q5914-67002 (exchange engine w/formatter) ENWW Life expectancies of parts that wear...

  • Page 37: Cleaning The Product, Cleaning The Print Path

    Cleaning the print path The HP LJ 1022 series feature a special cleaning mode to clean the paper path. NOTE This process requires a transparency to remove dust and toner from the print paper path.

  • Page 38: Cleaning The Print-cartridge Area

    Cleaning the print-cartridge area You do not need to clean the print-cartridge area often. However, cleaning this area can improve the quality of your printed sheets. Turn off the printer, unplug and remove the power cord. Wait for the printer to cool. Open the print-cartridge door, and remove the print cartridge.

  • Page 39

    Replace the print cartridge, and close the print-cartridge door. Plug in the printer, and then turn it on. Chapter 3 Maintenance ENWW...

  • Page 40: Cleaning The Pickup Roller

    Cleaning the pickup roller If you want to clean the pickup roller rather than replace it, use the following instructions. Remove the pickup roller as described in steps 1 through 5 of Replacing the pickup roller on page 30. With the roller outside the printer, use the following steps to complete the cleaning. Dampen a lint-free cloth with water and scrub the roller.

  • Page 41: User-replaceable Parts, Replacing The Pickup Roller

    User-replaceable parts To order a new pickup roller or separation pad, go to www.partsdirect.hp.com. Replacing the pickup roller If the printer regularly misfeeds (no media feeds through) and cleaning the pickup roller does not fix the problem, replace the pickup roller.

  • Page 42

    Locate the pickup roller. Gently release the small, white tabs on each side of the pickup roller by pushing them away from the roller, and then rotate the pickup roller toward the front. CAUTION Use gentle pressure to release the small, white tabs to avoid breaking them. Gently pull the pickup roller up and out.

  • Page 43

    Rotate the top of the new pickup roller into position until the white tabs on each side of the roller snap the roller into place. Reinstall the print cartridge and close the print cartridge door. Plug in the printer, and then turn it on. Chapter 3 Maintenance ENWW...

  • Page 44: Replacing The Separation Pad

    Cleaning the pickup roller on page 29 for instructions. To order parts, go to www.partsdirect.hp.com. Turn off the printer, unplug and remove the power cord. Wait for the printer to cool. At the back of the printer, use a #2 Phillips screwdriver to unscrew the two screws that hold the separation pad in place.

  • Page 45

    Remove the separation pad. Insert the new separation pad, and screw it in place. Plug the printer in, and then turn it on. Chapter 3 Maintenance ENWW...

  • Page 46: Replacing The Main Input Tray (paper-pickup Tray Assembly)

    Replacing the main input tray (paper-pickup tray assembly) If you break or damage the main input tray (also called the paper-pickup tray assembly), you can replace it. To order parts, go to www.partsdirect.hp.com. Carefully flex the main input tray just enough to release one side.

  • Page 47: Replacing The Output-bin Extension (delivery-tray Assembly)

    Replacing the output-bin extension (delivery-tray assembly) If you break or damage the output-bin extension (also called the delivery-tray assembly), you can replace it. To order parts, go to www.partsdirect.hp.com. Carefully flex the sides of output-bin extension just enough to release the hinge pins.

  • Page 48: Jams, Clearing Jams, Typical Media Jam Locations

    This helps prevent multiple sheets of media from feeding through the printer at one time, reducing media jams. ■ The media does not meet HP specifications. See Media specifications on page Typical media jam locations ■...

  • Page 49: Removing A Jammed

    Removing a jammed page Use the procedures in this section to remove a jam. CAUTION Media jams might result in loose toner on the page. If you get any toner on your clothes, wash them in cold water. Hot water will permanently set the toner into the fabric. CAUTION To prevent damage to the printer when clearing jams, including jams in the output bin, always open the print cartridge door and remove the print cartridge.

  • Page 50

    When you have removed the jammed media, replace the print cartridge, and close the print cartridge door. After clearing a media jam, you might need to turn the printer off then on again. NOTE When you add new media, remove all of the media from the input tray and straighten the stack of new media.

  • Page 51

    Chapter 3 Maintenance ENWW...

  • Page 52: 4 Operational Overview

    Operational overview This chapter describes the general components of the HP LaserJet 1022 series printers, and the theory of operation. ● Basic functions ● Formatter system ● Printer operation ENWW...

  • Page 53: Basic Functions

    Basic functions The following are the major systems of the printer: ■ Formatter and I/O functions ■ Formatter system ■ Printer functions and operation ■ Engine control system (engine control unit [ECU] and engine power assembly) ■ Image-formation system ■ Paper-feed system PRINTER FORMATTER...

  • Page 54: Formatter System, Central Processing Unit, Usb Interface, Control Panel, Draft Mode (economode)

    NOTE HP does not recommend the full-time use of EconoMode. If EconoMode is used full-time when the average toner coverage is very low, it is possible that the toner supply will outlast the mechanical parts of the print cartridge.

  • Page 55: Hp Memory Enhancement Technology (met), Enhanced I/o

    HP Memory Enhancement technology (MEt) HP (MEt) effectively doubles the standard memory through a variety of font- and data-compression methods. Enhanced I/O The Enhanced I/O feature uses printer memory to store data that the printer received from the host computer. When Enhanced I/O is enabled, you can send more data to the product in less time, so that you can return to your application sooner.

  • Page 56: Printer Operation

    Printer operation Printer functions are divided into five groups: ■ Engine control ■ Formatter ■ Image formation ■ Laser/scanner ■ Pickup and feed The following figure is a block diagram of the printer: Figure 4-2 Printer functional-block diagram ENWW Printer operation...

  • Page 57: Engine Control System (engine Control Unit And Power Assembly), Printer-engine-control System

    In other HP LaserJet products, the ECU and power functions are combined onto one PCA known as the controller PCA or the dc controller PCA. In the HP LaserJet 1022 series printers, the control functions are primarily relegated to the ECU PCA and the power functions to the engine-power-assembly PCA.

  • Page 58: Printer Laser/scanner Unit

    Printer laser/scanner unit The ECU sends signals to the laser/scanner assembly to modulate the laser diode on and off modes and to drive the laser/scanner motor. Laser driver PCB /BDI Cylindrical lens VDO1 /VDO1 VDO2 /VDO2 sensor CNT0 CNT1 CNT2 Photosensitive /ACC drum...

  • Page 59: Power System On The Engine-power Assembly

    Power system on the engine-power assembly The engine-power assembly provides the ac, dc, and high-voltage power supply circuits. AC power distribution The ac power circuitry supplies ac voltage whenever the power cord is connected to the ac power source and the power switch is on. The ac voltage is distributed to the dc power supply circuitry and to the ac driver circuitry, which controls ac voltage to the fuser-assembly heating element.

  • Page 60: Image-formation System

    Engine controller PCB Power supply PCB High-voltage power supply circuit IC902 Primary charging bias circuit IC301 PRPWM DC voltage generation J902-12 J201-14 circuit Primary charging roller J304 Combined PRAC IC301 IC301 AC voltage J902-11 J201-15 generation Photosensitive circuit drum J303 Developing bias circuit DC voltage generation...

  • Page 61: The Seven Image-formation Processes

    The seven image-formation processes 2. Scanning exposure Paper direction Direction of drum rotation 1. Primary charging Developing stage 3. Developing 7. Drum cleaning Paper delivery Fusing stage 5. Separation 4. Transfer Paper Pickup 6. Fusing Transfer stage Figure 4-5 Image-formation block diagram Conditioning stage (primary charging)—This process applies a uniform negative charge to the surface of the drum with the primary charging roller, which is located in the print cartridge.

  • Page 62: Print Cartridge, Printer-paper Feed System

    Fusing stage—During this process, the heat and pressure fuse the toner into the media to produce a permanent image. The media passes between a heated fusing element and a soft pressure roller, which melt the toner and press it into the media. Drum-cleaning stage—During this process, the cleaning blade is in contact with the surface of the drum at all times.

  • Page 63

    Engine controller PCB Face-down delivery roller PS804 Formatter PS803 Fuser pressure roller Fuser film unit Transfer charging Photosensitive roller drum PS801 PS802 Manual feed tray Pickup tray Pick-up roller Separation PS801: Top-of-page sensor PS802: Paper width sensor PS803: Paper delivery sensor PS804: Fuser delivery paper width sensor M1: Main motor SL1: Pickup solenoid...

  • Page 64: Jam Detection, Conditions Of Jam Detection

    Jam detection The top-of-page sensor (PS801) and the paper-delivery sensor (PS803) detect media moving through the printer. If a jam is detected, the ECU immediately stops the printing process and the jam light on the control panel illuminates. Conditions of jam detection ■...

  • Page 65: Solenoid, Sensors, Switches, And Motor

    Solenoid, sensors, switches, and motor The following figure shows the locations of the solenoid, sensors, switches, and motor. Figure 4-7 Solenoid, sensors, switches, and motor The door switch detects whether or not the print-cartridge door is closed. Printing cannot continue until the print-cartridge door is closed.

  • Page 66: Basic Sequence Of Operation (formatter-to-printer), Table 4-1 Basic Sequence Of Operation

    Basic sequence of operation (formatter-to-printer) The microprocessor (CPU) on the ECU controls the printer operation sequence. The following events take place during normal printer operation. Table 4-1 Basic sequence of operation Period Purpose Remarks WAIT: After the product is turned on until To clear the drum surface of potential Detects whether or not the cartridge is the end of the initial rotation of the main...

  • Page 67

    Figure 4-8 Printer timing diagram NOTE The timing chart is for one sheet of A4-size media. Chapter 4 Operational overview ENWW...

  • Page 68: 5 Removal And Replacement

    Removal and replacement This chapter describes the removal and replacement of field-replaceable units (FRUs) only. ● Removal and replacement strategy ● User-replaceable parts ● Covers ● Internal assemblies ENWW...

  • Page 69: Removal And Replacement Strategy, Required Tools, Before Performing Service

    Removal and replacement strategy This chapter contains detailed steps and images that show parts removal. Replacement is generally the reverse of removal. Occasionally, notes are included to provide directions for difficult or critical replacement procedures. WARNING! Remove the power cord before attempting to service the product. If this warning is not followed, severe injury can result, as well as damage to the device.

  • Page 70

    Print cartridge Open the print-cartridge door on the top of the printer. Remove the print cartridge. CAUTION To prevent damage, do not expose the print cartridge to light. Cover it with a piece of paper. Figure 5-1 Removing the print cartridge ENWW Removal and replacement strategy...

  • Page 71: Parts Removal Order

    Parts removal order Use the following illustration to determine which parts must be removed before removing other parts. START Transfer-roller Right-side cover Left-side cover User-replaceable parts: assembly Output bin Main input tray Pickup roller Front-cover Rear-panel assembly assembly Engine-power ECU assembly assembly Laser/scanner Fuser (fixing)

  • Page 72: Replacing The Pickup Roller, User-replaceable Parts

    User-replaceable parts To order a new pickup roller or separation pad, go to www.partsdirect.hp.com. Replacing the pickup roller If the printer regularly misfeeds (no media feeds through) and cleaning the pickup roller does not fix the problem, replace the pickup roller.

  • Page 73

    Locate the pickup roller. Gently release the small, white tabs on each side of the pickup roller by pushing them away from the roller, and then rotate the pickup roller toward the front. CAUTION Use gentle pressure to release the small, white tabs to avoid breaking them. Gently pull the pickup roller up and out.

  • Page 74

    Rotate the top of the new pickup roller into position until the white tabs on each side of the roller snap the roller into place. Reinstall the print cartridge and close the print cartridge door. Plug in the printer, and then turn it on. ENWW User-replaceable parts...

  • Page 75

    Cleaning the pickup roller on page 29 for instructions. To order parts, go to www.partsdirect.hp.com. Turn off the printer, unplug and remove the power cord. Wait for the printer to cool. At the back of the printer, use a #2 Phillips screwdriver to unscrew the two screws that hold the separation pad in place.

  • Page 76

    Remove the separation pad. Insert the new separation pad, and screw it in place. Plug the printer in, and then turn it on. ENWW User-replaceable parts...

  • Page 77

    Replacing the main input tray (paper-pickup tray assembly) If you break or damage the main input tray (also called the paper-pickup tray assembly), you can replace Carefully flex the main input tray just enough to release one side. NOTE Be careful not to break the hinge points. Figure 5-3 Remove the main input tray Remove the main input tray.

  • Page 78

    Replacing the output-bin extension (delivery-tray assembly) If you break or damage the output-bin extension (also called the delivery-tray assembly), you can replace it. To order parts, go to www.partsdirect.hp.com. Carefully flex the output-bin extension just enough to release the hinge pins.

  • Page 79: Covers, Right-side Cover

    Covers Remove the covers to access the internal replaceable parts. Right-side cover Before removing the cover, examine Figure 5-5 Remove the right-side cover (1 of 4) on page 68 and note the location of tabs on the cover. Figure 5-5 Remove the right-side cover (1 of 4) Remove one screw (callout 1) and then release one tab (callout 2) Figure 5-6...

  • Page 80

    Open the print-cartridge door. Grasp the cover, and carefully pry up on the cover to release one tab. Figure 5-7 Remove the right-side cover (3 of 4) Slightly rotate the back of the cover away from the product, and then slide the cover forward to remove it.

  • Page 81: Left-side Cover, Rear Panel And Top-cover Assembly

    Left-side cover Removing the left-side cover is similar to removing the right-side cover. Use the steps and figures for removing the right-side cover, except start the procedure by examining the tabs on the left side and removing the screw on the left side. NOTE If the cover cannot be removed easily, release one additional tab that is located on the bottom of the printer near the center of the cover.

  • Page 82

    Squeeze the two retaining tabs on the plastic door-link clip to release it from the hinge arm on the print-cartridge door. Figure 5-10 Remove the rear panel and top-cover assembly (2 of 6) Hint Reinsert the plastic door-link clip in the hinge arm or store it with the screws to prevent losing it.

  • Page 83

    Remove one screw (callout 1) from the back of the product. Figure 5-12 Remove the rear panel and top-cover assembly (4 of 6) The top-cover assembly and metal rear panel are interlocked with plastic tabs. Plastic tabs also secure the metal rear panel at the bottom. Lift up the top cover assembly at the top and pull it back slightly.

  • Page 84

    Lift up on the top-cover assembly to remove it. Hint When the cover is reinstalled, make sure that the tab on the left side of the assembly is fitted into the slot in the printer chassis. Figure 5-14 Remove the rear panel and top-cover assembly (6 of 6) Reinstalling the top-cover assembly To reinstall the top-cover assembly, raise the two pressure-release levers.

  • Page 85

    Position the top-cover assembly over the pressure-release levers (callout 1), and lower it onto the chassis. Make sure that the pressure-release levers are inserted through the slots (callout 2) on the top-cover assembly. Figure 5-16 Reinstall the top-cover assembly (2 of 2) CAUTION Make sure that the two plastic antistatic tabs are correctly positioned.

  • Page 86: Front Cover

    Front cover Remove the following assemblies. ● Right-side cover. See Right-side cover on page ● Left-side cover. See Left-side cover on page Before removing the cover, examine Figure 5-17 Remove the front cover (1 of 3) on page 75 and note the locations of the plastic tabs at the top of the front cover. Open the print-cartridge door. Figure 5-17 Remove the front cover (1 of 3) ENWW...

  • Page 87

    Release the tab on the bottom right side of the front cover, and then pull the bottom of the cover away from the chassis. Repeat this step for the left side of the front cover. Figure 5-18 Remove the front cover (2 of 3) With the bottom of the front cover released, pull up and back at the top of the cover while gently rocking it to release all of the tabs at the top and remove the cover.

  • Page 88: Internal Assemblies, Transfer-roller Assembly

    Internal assemblies When replacing internal assemblies, make sure to transfer any component parts that are not provided with the new assembly from the failed assembly to the new assembly. For example, sensor PCBs are not included with the fuser assembly or the paper-pickup assembly. The sensor PCB from the failed assembly must be transferred to the new assembly Transfer-roller assembly Before proceeding, make sure it is absolutely necessary to remove the transfer roller.

  • Page 89

    The clamps on the paper guide fit over the bearings on each end of the transfer roller. Do not touch the black-sponge portion of the transfer roller. Grasp the right end of the paper guide and pull the clamp off the right bearing. Slide the paper guide slightly to the right, and the left clamp will slide off the left bearing.

  • Page 90

    Reinstallation tip A small grounding spring is under the right transfer-roller bearing. When reinstalling the transfer roller, position this spring correctly under the right bearing. Reverse the removal process to install the new transfer roller. Then reinstall the paper guide by gently pressing the two ends of the guide onto the transfer-roller bearings until the clamps snap into place.

  • Page 91: Engine-power Assembly

    Engine-power assembly Remove the following assemblies. ● Right-side cover. See Right-side cover on page ● Left-side cover. See Left-side cover on page ● Top-cover assembly. See Rear panel and top-cover assembly on page ● Front cover. See Front cover on page Disconnect the six cables (callout 1) near the top of the power assembly.

  • Page 92

    Remove two screws from the back of the printer (callout 3), disconnect the high-voltage wire (callout 4) and then remove the power supply. NOTE Be careful not to lose the two springs that are behind the engine-power assembly. Figure 5-24 Remove the engine-power assembly (2 of 2) Reinstallation tip When reinstalling the engine-power assembly, make sure that the cable...

  • Page 93: Fuser (fixing) Assembly

    Fuser (fixing) assembly Remove the following assemblies. ● Right-side cover. See Right-side cover on page ● Left-side cover. See Left-side cover on page ● Top-cover assembly. See Rear panel and top-cover assembly on page Disconnect cables, as necessary, from near the top of the engine-power assembly and disconnect the high-voltage wire (callout 1) from the back of the printer.

  • Page 94

    Remove three screws (callout 2). (This figure shows the delivery-sensor PCB removed, but it is not necessary to remove this PCB in order to remove the fuser). Figure 5-26 Remove the fuser (fixing) assembly (2 of 2) Lift the end of the fuser assembly from the right side of the printer, and then remove it. Reinstallation tip When replacing the fuser assembly, be sure to transfer the delivery sensor PCB from the old fuser to the new one.

  • Page 95: Paper-pickup Assembly

    Paper-pickup assembly Remove the following assemblies. ● Right-side cover. See Right-side cover on page ● Left-side cover. See Left-side cover on page ● Top-cover assembly. See Rear panel and top-cover assembly on page ● Front cover. See Front cover on page ●...

  • Page 96: Engine Control Unit (ecu) Assembly

    Engine control unit (ECU) assembly Remove the following assemblies. ● Right-side cover. See Right-side cover on page ● Left-side cover. See Left-side cover on page ● Top-cover assembly. See Rear panel and top-cover assembly on page ● Front cover. See Front cover on page Disconnect the flat flexible (ribbon) cable (callout 1) from the formatter, which is on the right side of the product.

  • Page 97

    Disconnect the flat flexible (ribbon) cable (callout 2) from the engine-power assembly. Figure 5-29 Remove the ECU assembly (2 of 6) Remove four screws (callout 3). Figure 5-30 Remove the ECU assembly (3 of 6) Lift the ECU cover up just enough to free it, and then tilt it back as far as it will go without forcing it. Chapter 5 Removal and replacement ENWW...

  • Page 98

    Two sheet-metal hook hinges (one on each side) secure the cover. Use a screwdriver to push both hooks free, and then remove the ECU cover. Figure 5-31 Remove the ECU assembly (4 of 6) Release the plastic wire-retainer tab (arrow 1), and rotate the retainer up and away from the chassis (arrow 2).

  • Page 99

    Disconnect one flat flexible (ribbon) cable and the connector to the step motor (callout 4). Remove two screws (callout 5). Loosen the tape (callout 6) that secures the cable to the chassis. As you remove the ECU, unplug the additional connector to the laser/scanner assembly. CAUTION Do not pull directly on the wires when a connector is disconnected.

  • Page 100: Laser/scanner Assembly

    Laser/scanner assembly Remove the following assemblies. ● Right-side cover. See Right-side cover on page ● Left-side cover. See Left-side cover on page ● Top-cover assembly. See Rear panel and top-cover assembly on page ● Front-cover. See Front cover on page ●...

  • Page 101

    Chapter 5 Removal and replacement ENWW...

  • Page 102: Troubleshooting

    Troubleshooting This chapter describes how to isolate and resolve printer problems, print-quality problems, and media problems. Troubleshooting details are provided to resolve problems or to isolate replaceable parts. ● Basic troubleshooting ● Reset the factory default settings (cold reset) ● Control-panel pages ●...

  • Page 103: Basic Troubleshooting, Table 6-1 Basic Troubleshooting

    Basic troubleshooting Basic troubleshooting Table 6-1 Basic troubleshooting Did the printer turn on? Cause Solution No power is available because the power source, cable, or Verify that the product is plugged in. Make sure that the switch failed. printer is plugged directly into a working wall receptacle. Verify that the power cable is functional and that the power switch is on.

  • Page 104

    Table 6-1 Basic troubleshooting (continued) Print a demo page by pressing the G button when the printer is idle. Does the demo page print? Cause Solution The media does not move smoothly through the paper path. If the media is consistently jamming and the paper path is clear, replace either the paper-pickup assembly or the fuser, depending on where it is jamming.

  • Page 105: Reset The Factory Default Settings (cold Reset), Control-panel, Table 6-2 Control-panel Pages: Time Ranges

    Reset the factory default settings (cold reset) Turning on the printer while pressing the buttons restores the factory default settings. ANCEL Turn off the printer. Press and hold the buttons. ANCEL Turn the printer on and continue to press and hold the buttons until all three LEDs are blinking. Release the buttons.

  • Page 106: Control-panel Lights, Control-panel Light Patterns, Table 6-3 Control-panel Light Patterns

    Control-panel lights The printer indicates status and errors through patterns of the , and lights. If any EADY TTENTION lights are blinking, the error can usually be resolved. If the error pattern occurs when printing, try pressing the button to continue. Make sure that the print cartridge is installed correctly and the print-cartridge door is closed.

  • Page 107: Chapter 6 Troubleshooting

    Table 6-3 Control-panel light patterns (continued) State of the printer Lights Action Out of memory - The product is out of The page you are printing might be too memory. complex for the product's memory capacity. Try lowering the resolution. Attention state - The print cartridge door Check the following: is open, the trays contain no media, no...

  • Page 108: Clearing Jams, Jams, Typical Media Jam Locations

    This helps prevent multiple sheets of media from feeding through the printer at one time, reducing media jams. ■ The media does not meet HP specifications. See Media specifications on page Typical media jam locations ■...

  • Page 109

    Removing a jammed page Use the procedures in this section to remove a jam. CAUTION Media jams might result in loose toner on the page. If you get any toner on your clothes, wash them in cold water. Hot water will permanently set the toner into the fabric. CAUTION To prevent damage to the printer when clearing jams, including jams in the output bin, always open the print cartridge door and remove the print cartridge.

  • Page 110

    When you have removed the jammed media, replace the print cartridge, and close the print cartridge door. After clearing a media jam, you might need to turn the printer off then on again. NOTE When you add new media, remove all of the media from the input tray and straighten the stack of new media.

  • Page 111: Print-quality Troubleshooting, Print-cartridge Problems, Checking The Print Cartridge, To Redistribute Toner In The Print Cartridge

    Print-quality troubleshooting Print-cartridge problems Checking the print cartridge Image-formation defects are frequently the result of problems in the print cartridge. If there is any doubt, always replace the print cartridge before troubleshooting image defects. Hint If the transfer roller was recently replaced, print-quality problems might be the result of skin oils on the black-sponge portion of the transfer roller.

  • Page 112

    Table 6-4 Solving print-quality problems (continued) Output pages are blank. Cause Solution The tape was not removed from the print cartridge. Remove the print cartridge, remove the tape, and reinstall the print cartridge. The print cartridge is depleted. Replace the print cartridge. The high-voltage connection between the printer and the print Perform a High-voltage-contacts check on page...

  • Page 113

    Random toner specks appear on the printed page. Cause Solution The media in use does not meet HP specifications (for Make sure that the media meets specifications detailed in example, it is too moist or too rough). the HP LaserJet Printer Family Print Media Guide.

  • Page 114

    Table 6-4 Solving print-quality problems (continued) Vertical black lines appear on the printed page. Cause Solution The print cartridge is depleted or damaged. Replace the print cartridge. The main input tray cover is not correctly installed. Make sure that the main input tray cover is correctly installed. Rarely, the fuser is defective.

  • Page 115

    The toner is loose, and it does not stay attached to the printed page. Cause Solution The media you are using does not meet HP specifications (for Make sure that the media meets the specifications detailed in example, it is too moist or too rough).

  • Page 116

    Table 6-4 Solving print-quality problems (continued) The toner is loose, and it does not stay attached to the printed page. Cause Solution Preferences dialog box, and then click OK again to close the Printer properties dialog box. The print path needs to be cleaned. Clean the print path (See Cleaning the print path on page 26).

  • Page 117

    Preferences dialog box, and then click OK again to close the Printer properties dialog box. The media is too slick or too thick. Try a different media. Make sure that the media meets the specifications detailed in the HP LaserJet Printer Family Print Media Guide. Chapter 6 Troubleshooting ENWW...

  • Page 118

    The media in use does not meet HP specifications (for Make sure that the media meets the specifications detailed in example, it is too moist or too rough).

  • Page 119

    (see the illustration on the print cartridge). Replace the print cartridge. The media you are using does not meet HP specifications (for Make sure that the media meets the specifications detailed in example, it is too moist or too rough).

  • Page 120

    Do not use media that is damaged or has already been put through a copier or printer. The media you are using does not meet HP specifications (for Make sure that the media meets the specifications detailed in example, it is too moist or too rough).

  • Page 121

    Table 6-4 Solving print-quality problems (continued) Droplets of water are deposited on the trailing edge Cause Solution Moisture in the printer is condensing on the fuser assembly. In Try moving the printer to a less humid area. Try a different excessively hot and humid areas, media retains moisture.

  • Page 122: Solving Paper-feed Problems, Table 6-5 Solving Paper-feed Problems

    Preferences dialog box, and then click OK again to close the Printer properties dialog box. The media you are using does not meet HP specifications (for Make sure that the media meets the specifications detailed in example, it is too moist or too rough).

  • Page 123

    The paper does not meet HP specifications for print media. Make sure that the media meets the specifications detailed in the HP LaserJet Printer Family Print Media Guide.

  • Page 124: Functional Checks, Half Self-test Functional Check, To Perform A Half Self-test Check

    Functional checks This section includes five functional checks for troubleshooting. Half self-test functional check The print process can be subdivided into the following stages: ■ Image-formation stage (charges the drum and writes a latent image to the drum with the laser) ■...

  • Page 125: Drum-rotation Functional Check

    Check the fuser connections (callout 1) on the engine-power assembly. Also check the fuser ground connection at the back side of the printer. Figure 6-2 Check the fuser connections If a transfer problem exists, replace the transfer roller (do not touch the black-sponge portion of the transfer roller).

  • Page 126: High-voltage-contacts Check, To Check The Print-cartridge Contacts

    High-voltage-contacts check The high-voltage contacts in the printer must have a good connection with the contacts on the print cartridge to provide the necessary voltages for the electrophotographic processes. To check the print-cartridge contacts Remove the print cartridge and visually inspect the three connection points (callout 1) on the end of the print cartridge.

  • Page 127: To Check The Printer High-voltage Contacts

    To check the printer high-voltage contacts The printer has three spring-loaded pins (callout 1) that make contact with the high-voltage points on the print cartridge. Verify that the pins are not dirty or corroded and that the spring-loading action is functional.

  • Page 128: Troubleshooting Tools, Repetitive-image-defect Ruler

    Troubleshooting tools If the printer output has a consistent, repetitive defect, then use the following ruler to predict which part needs to be replaced based on the measured distance between the repetitions of the defect. Repetitive-image-defect ruler First occurrence of print defect (0.00 inches) Print cartridge 32.0 mm (1.26 inches) Print cartridge 37.7 mm (1.48 inches) Fuser (fixing assembly) 41.0 mm (1.61 inches)

  • Page 129: Circuit Diagram

    Circuit diagram Figure 6-6 Circuit diagram Chapter 6 Troubleshooting ENWW...

  • Page 130

    Solenoid, sensors, switches, and motor The following figure shows the locations of the solenoid, sensors, switches, and motor. Figure 6-7 Solenoid, photosensors, switches, and motor The door switch detects whether or not the print-cartridge door is closed. Printing cannot continue until the print-cartridge door is closed.

  • Page 131

    Chapter 6 Troubleshooting ENWW...

  • Page 132: Parts And Diagrams

    Parts and diagrams This chapter provides an exploded view that shows the replaceable parts of the printer, tables of replaceable parts, and links to other resources. ● Ordering parts and supplies ● Accessories and consumables ● Printer exchange/parts ● External covers and panel ●...

  • Page 133: Parts, Related Documentation And Software, Parts That Wear, Table 7-1 Technical Support Websites

    122. Table 7-1 Technical support websites HP Customer Care Online www.hp.com/go/support Software drivers, support documentation, and answers to frequently asked questions HP Technical Training (North America) www.hp.com/go/resellertraining Classes and schedules Parts www.outfield.external.hp.com/spi/welcom.htm Parts information Parts that wear The parts that wear on the product are listed in chapter 3 of this manual. Parts are available directly from Hewlett-Packard at the following websites: ■...

  • Page 134: Accessories And Consumables, Accessories, Table 7-2 Accessories

    Accessories and consumables Accessories Table 7-2 Accessories Product name Description Product number Part number Print cartridges, cables, and HP Jetdirect Print Servers Print cartridge 2,000 page cartridge Q2612A Q2612–67901 Cables and interface 1.8-meter (6-feet) USB cable 8120-8485 accessories Cables and interface .6-meter (2-foot) USB cable...

  • Page 135: Common Hardware

    Common hardware The product uses common Phillips-head screws as fasteners. Chapter 7 Parts and diagrams ENWW...

  • Page 136: How To Use The Parts Lists And Diagrams

    How to use the parts lists and diagrams The figures in this chapter illustrate the major subassemblies in the product. A table follows the exploded assembly diagram. Each table lists the reference designator, the associated part number for the item, and a description of the part.

  • Page 137: Printer Exchange/parts

    Printer exchange/parts Chapter 7 Parts and diagrams ENWW...

  • Page 138: Table 7-3 Printer Exchange

    Description Part number HP LJ 1022-110V Printer (replacement) Q5912–67056 HP LJ 1022-110V Printer (refurbished) Q5912–69056 HP LJ 1022-110V Printer (exchange engine w/formatter) Q5912–67056 HP LJ 1022-220V Printer (replacement) Q5912–67055 HP LJ 1022-220V Printer (refurbished) Q5912–69055 HP LJ 1022-220V Printer (exchange engine w/formatter) Q5912–67055...

  • Page 139: External Covers And Panel

    External covers and panel Figure 7-1 External covers and panels Chapter 7 Parts and diagrams ENWW...

  • Page 140: Table 7-4 External Covers And Panels

    Table 7-4 External covers and panels Description Part number Cover, left RC1-5524-000CN Cover, front RL1-0784-000CN Paper pickup tray assembly (main input tray) RM1-2035-000CN Top cover assembly (includes fuser cover and print cartridge RM1-2036-000CN door) Cover, right assembly RM1-2054-000CN Output bin extension (delivery tray assembly) RM1-2055-000CN ENWW External covers and panel...

  • Page 141: Internal Components

    Internal components (J203) (PS803) (J904) (PS801) (PS802) Figure 7-2 Internal components (1 of 3) Chapter 7 Parts and diagrams ENWW...

  • Page 142

    Table 7-5 Internal components (1 of 3) Description Part number Panel, rear RC1-5520-000CN Separation pad assembly RM1-2048-000CN Transfer roller assembly RM1-2062-000CN Paper pickup assembly RM1-2043-000CN Fuser (fixing) assembly 110 to 127V RM1-2049-000CN Fuser (fixing) assembly 220 to 240 V RM1-2050-000CN Power supply 110 to 127 V RM1-2310-000CN Power supply 220 to 240 V...

  • Page 143

    (J2) (J904) (J801) (J201) (J001) (J002) Figure 7-3 Internal components (2 of 3) Chapter 7 Parts and diagrams ENWW...

  • Page 144

    Table 7-6 Internal components (2 of 3) Description Part number Laser/scanner assembly RM1-2033-000CN Engine controller unit (ECU) RM1-2309-000CN ENWW Internal components...

  • Page 145

    Figure 7-4 Internal components (3 of 3) Chapter 7 Parts and diagrams ENWW...

  • Page 146

    Table 7-7 Internal components (3 of 3) Description Part number Stopper, door link clip RC1–1957–000CN ENWW Internal components...

  • Page 147

    (J4) (SL1) Figure 7-5 Paper-pickup assembly Chapter 7 Parts and diagrams ENWW...

  • Page 148: Table 7-8 Paper-pickup Assembly

    Table 7-8 Paper-pickup assembly Description Part number Paper-pickup assembly RM1-2043-000CN Roller, pickup RL1-0266-000CN ENWW Internal components...

  • Page 149: Alphabetical Parts List, Table 7-9 Alphabetical Parts List

    Q5914–69055 Printer exchange on page 127 HP LJ 1022nw-220V (replacement) Q5914–67055 Printer exchange on page 127 HP LJ 1022-110V Printer (exchange engine w/formatter) Q5912–67056 Printer exchange on page 127 HP LJ 1022-110V Printer (refurbished) Q5912–69056 Printer exchange on page 127 HP LJ 1022-110V Printer (replacement) Q5912–67056...

  • Page 150

    Table 7-9 Alphabetical parts list (continued) Description Part number Table and page HP LJ 1022/1022n/1022nw network connector Q5914-60102 Printer exchange on page 127 HP LJ 1022nw formatter Q3969-60002 Printer exchange on page 127 HP LJ 1022nw wireless cable Q5914-60102 Printer exchange on page 127...

  • Page 151: Numerical Parts List, Table 7-10 Numerical Parts List

    Printer exchange on page 127 Q5912–67055 HP LJ 1022-220V Printer (replacement) Printer exchange on page 127 Q5912–67055 HP LJ 1022-220V Printer (exchange engine w/formatter) Printer exchange on page 127 Q5912–67056 HP LJ 1022-110V Printer (replacement) Printer exchange on page 127 Q5912–67056...

  • Page 152

    Table 7-10 Numerical parts list (continued) Part number Description Table and page RL1-0266-000CN Roller, pickup Paper-pickup assembly on page 137 RL1-0784-000CN Cover, front External covers and panels on page 129 RM1-2033-000CN Laser/scanner assembly Internal components (2 of 3) on page 133 RM1-2035-000CN Paper pickup tray assembly (main input tray) External covers and panels...

  • Page 153

    Chapter 7 Parts and diagrams ENWW...

  • Page 154: Index

    5 circuit diagram 118 cover front circuitry, power system 48 part numbers 129, 138, 141 cables, part numbers 123 classes, HP Technical Training cover left Canadian DOC regulations 10 part numbers 129, 138, 140 Cancel Job button 3, 15 cleaning...

  • Page 155

    51 connector assembly, checking operations 50, 51 feed system, paper 51 rotation functional check 114 feeding problems, troubleshooting operations 48 drum cleaning stage, image testing 115 formation process 51 HP Care Pack 8 duty cycle 5 Index ENWW...

  • Page 156

    HP Customer Care Online 122 feeding problems, HP Jetdirect print servers, ordering jams troubleshooting 111 clearing 37, 97 jams, clearing 37 HP Technical Training 122 detection operations 53 loading 20 humidity frequent 111 locating 3 specifications 6 Jetdirect print servers, ordering...

  • Page 157

    129, 139, sizes 16 specifications 16 transfer roller 131, 139, 141 on/off switch, locating 4 storing 111 voltage 125 Online Customer Care, HP 122 troubleshooting 17 partial characters, troubleshooting operating environment, type, setting 21 102, 106 specifications 6, 14...

  • Page 158

    disconnecting 58 repetitive image defect ruler engine power assembly 48 removing 80 scattered toner 108 base 5 testing high-voltage 115 skewed pages 107, 111 formatter 43 power supply 110 V smears 104 Ready light part numbers 131, 139, 141 specks 102 locating 3, 15 power supply 220 V water droplets 110...

  • Page 159

    50 speed top cover assembly scatter, toner 108 data transfer 44 part numbers 129, 139, 141 schedules, HP Technical Training printing 6 top cover assembly, removing 70 processor 43 trailing edge, detection 53 screwdrivers, required 58 spots 102, 108...

  • Page 160

    media sizes supported 16 vertical defects, troubleshooting multifeeds 111 replacing 35, 66 vertical lines, troubleshooting troubleshooting basic 92 vertical white stripes, blank pages 101 troubleshooting 108 characters, misprinted 106 VIDEO signals 55 control panel 92, 94 voltage control panel lights 95 dc power supply 48 control panel pages 94 high-voltage power supply 48...

  • Page 161

    Index ENWW...

  • Page 163

    © 2005 Hewlett-Packard Development Company, L.P. www.hp.com *Q5912-90901* *Q5912-90901* Q5912-90901...

This manual also for:

Laserjet 1022n, Laserjet 1022nw

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  • Jackie Dec 01, 2014 06:16:
    How do you clean the drum and roller?