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hp LaserJet 1200 series
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    hp LaserJet 1200 series service...

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    HP LaserJet 1200 Series Service...

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    MERCHANTABILITY AND guide. FITNESS FOR A PARTICULAR PURPOSE. Observe all warnings and instructions marked on the Hewlett-Packard shall not be product. liable for any direct, indirect, incidental, consequential, or Use only a grounded other damage alleged in electrical outlet when...

  • Page 5: Table Of Contents

    Contents 1 Product information Chapter contents ..........13 Introduction .

  • Page 6: Table Of Contents

    3 Maintenance Chapter contents ..........39 Life expectancies of consumables .

  • Page 7: Table Of Contents

    Covers ............80 Left side cover .

  • Page 8: Table Of Contents

    Service mode functions ......... . . 156 NVRAM initialization/cold reset .

  • Page 9: Table Of Contents

    Figures Figure 1. Model and serial number labels ......19 Figure 2. Front and side view .

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    Figure 42. Removing the formatter (2 of 2) ......98 Figure 43. Removing the laser/scanner (1 of 2) .

  • Page 11: Table Of Contents

    Figure 89. Internal components (1 of 2)....... . 176 Figure 90. Internal components (2 of 2).

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    10 Figures...

  • Page 13: Table Of Contents

    Tables Table 1. Physical specifications ........16 Table 2.

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    12 Chapter - Tables...

  • Page 15: Chapter Contents

    Product information Chapter contents Introduction ........14 Hardware description .

  • Page 16: Introduction, Hardware Description

    Introduction The HP LaserJet 1200 printer is designed to: Print—Print documents easily with the laser-quality you have come to expect from an HP LaserJet printer. With the optional copier/scanner, you can: Copy—Make superior laser-quality copies. With the software, you can make up to 99 copies of a 30-page original. You can also enlarge, reduce, adjust contrast, and collate.

  • Page 17: Firmware Description

    Firmware description The firmware in the printer includes: Enhanced PCL 6 with status readback 80 TrueType™ fonts, plus Cyrillic, Greek, Hebrew, and Arabic Pixel placement, mosaic characters Memory Enhancement technology (MEt) with hardware compression and decompression The printer firmware also has REt and EconoMode functionality. Scan capability includes 600 dpi and 24-bit color.

  • Page 18: Product Specifications

    Product specifications Table 1. Physical specifications Category Specification Height 253 mm (10 inches) without optional copier/ scanner 416 mm (16.4 inches) with optional copier/ scanner Depth 486 mm (19.1 inches) Width 415 mm (16.3 inches) Weight (cartridge 7.3 kg (16.1 lb) without optional copier/scanner installed) 8.7 kg (19.2 lb) with optional copier/scanner Table 2.

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    Table 3. Power specifications Category Specification Power 110 Vac (± 12%), 60 (± 3) Hz; 127 Vac requirements (± 12%), 60 (± 3) Hz -Or- 220 Vac (± 12%), 50/60 (± 3) Hz 240 Vac (± 12%), 50 (± 3) Hz Note Power sources are not interchangeable.

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    Table 6. Print operating acoustical emissions specifications Category Specification Sound Power Level, 6.1 B(A) (1 bel = 10 decibels) Sound Pressure Level, 56 dB(A) (operator position) Sound Pressure Level, 48 dB(A) (bystander position) Table 7. Copy operating acoustical emissions specifications Category Specification Sound Power Level,...

  • Page 21: Model And Serial Numbers, Figure 1. Model And Serial Number Labels

    Model and serial numbers The model number and serial number are listed on an identification label located on the inside of the toner cartridge door. The serial number contains information about the country of origin, revision level, production code, and production number of the printer. The label also contains power rating and regulatory information.

  • Page 22: Overview Of Printer, Front And Side View, Figure 2. Front And Side View

    Overview of printer Front and side view Figure 2. Front and side view Printer control panel Long media extension (output bin) Toner cartridge door Priority input tray Side media guides for the main input tray Media support for the main input tray Main input tray Side media guides for the priority input tray 20 Chapter 1 - Product information...

  • Page 23: Back And Side View, Figure 3. Back And Side View

    Back and side view Figure 3. Back and side view Fuser pressure release levers 10 Connection to optional copier/scanner 11 Left side cover 12 Parallel port 13 USB port 14 Power receptacle 15 Power switch (220-240 volt printers) 16 Straight-through output door Overview of printer 21...

  • Page 24: Overview Of Optional Copier/scanner, Top View, Figure 4. Top View

    Overview of optional copier/scanner Top view Figure 4. Top view Media input tray guides Copier/scanner door Straight-through output door Copier/scanner door release button Long media extensions Media output bin Copier/scanner control panel Media input tray Note See “Optional copier/scanner” on page 81 for more information about removing the optional copier/scanner from the printer.

  • Page 25: Warranty Statement

    Warranty statement DURATION OF WARRANTY: One year from date of purchase. HP warrants to you, the end-user customer, that HP hardware, accessories, and supplies, will be free from defects in materials and workmanship after the date of purchase, for the period specified above. If HP receives notice of such defects during the warranty period, HP will, at its option, either repair or replace products which prove to be defective.

  • Page 26: Extended Warranty

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

  • Page 27: Toner Cartridge Information, Refilled Toner Cartridges, Recycling Toner Cartridges

    Refilled toner cartridges While Hewlett-Packard does not prohibit the use of refilled toner cartridges during the warranty period or while the printer is under a maintenance contract, it is not recommended for the following...

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    26 Chapter 1 - Product information...

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    Installation and operation Chapter contents Operating environment......28 Identifying printer components ......29 Printer control panel .

  • Page 30: Operating Environment, Figure 5. Dimensions Of Printer, Figure 6. Dimensions Of Printer With Optional Copier/scanner

    Operating environment Place the printer 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 humidity: 20% to 80% relative humidity (no condensation) away from direct sunlight, open flames, and ammonia fumes sufficient space around the printer to allow for proper access and ventilation...

  • Page 31: Identifying Printer Components, Printer Control Panel, Figure 7. Printer Control Panel

    Identifying printer components Printer control panel The printer control panel has two lights and one lighted button. These lights produce patterns that identify the printer status. Ready light (green) Go button and light (green) Attention light (amber) Figure 7. Printer control panel button and light—Prints self-test pages.

  • Page 32: Control Panel Light Patterns, Figure 8. Light Status Legend

    Control panel light patterns Light off Light on Light blinking Figure 8. Light status legend Table 9. Control panel light messages Light Condition of the printer Action status Ready No action is necessary. To print a self-test The printer is ready to print. page, press and release the button on the printer control panel.

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    Table 9. Control panel light messages (continued) Light Condition of the printer Action status Door open, media out, no Make sure that the toner cartridge door toner cartridge, or paper jam is completely closed. The printer is in an error state Make sure that the media is loaded that requires operator correctly.

  • Page 34: Copier/scanner Control Panel, Figure 9. Copier/scanner Control Panel

    Copier/scanner control panel The control panel on the optional copier/scanner has two buttons, Figure 9. Copier/scanner control panel Copy—To perform Quick Copies, even if your computer is turned off, press the button. Scan—To launch HP LaserJet Director, press the button. If HP LaserJet Director is configured correctly, you can perform the following tasks: •...

  • Page 35: Selecting Media, Selecting Media To Print

    Selecting media Selecting media to print You can use paper with up to 100 percent recycled fiber content if it meets specifications. To order HP paper or the Print Media Guide for the HP LaserJet printer family, see the user guide. Highly textured stock might not print evenly.

  • Page 36: Selecting Media To Copy Or Scan

    Selecting media to copy or scan The copier/scanner for the printer can handle a broader range of media sizes and types than the printer itself can. The following are the supported media sizes: Minimum: 45 by 89 mm (1.7 by 3.5 inches) Maximum: 216 by 356 mm (8.5 by 14 inches) In addition, you can scan and copy many different types of media that are typically not used for printing, such as newsprint, photographs,...

  • Page 37: Loading Media, Loading Media To Print

    Loading media Loading 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 inches) stack of heavier media. Load media with the top forward and the side to be printed facing up. To prevent jams and skew, always adjust the side media guides.

  • Page 38: Loading Media To Copy Or Scan, Figure 10. Scanning A Business Card

    Loading media to copy or scan To load originals in the optional copier/scanner: Load the original with the side to be scanned facing up. If you scan a business card: a Load it with the long side (callout 1) facing forward and the text facing up.

  • Page 39: Printer Output Paths, Figure 11. Output Bin, Figure 12. Straight-through Output Door

    Printer output paths Output bin The output bin is located on the top of the printer. Printed media is collected here in the correct sequence when the straight-through output door is closed. Use the output bin when printing normal and large, collated documents.

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    38 Chapter 2 - Installation and operation...

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    Maintenance Chapter contents Life expectancies of consumables ..... 40 User-replaceable parts ......40 Replacing the printer pickup roller .

  • Page 42: Life Expectancies Of Consumables, User-replaceable Parts

    Life expectancies of consumables Inspect consumables when servicing the printer. Replace consumables as needed, based on failure or wear, rather than on usage. The following table lists approximate schedules for replacing consumables. Table 11. Life expectancies of consumables Description Part number Estimated life Remarks (pages)

  • Page 43: Replacing The Printer Pickup Roller

    Replacing the printer pickup roller If the printer regularly misfeeds (no media feeds through), you might have to replace or clean the pickup roller. CAUTION Failure to complete this procedure might damage the printer. Unplug the power cord from the printer, and allow the printer to cool.

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    Position the new pickup roller in the slot of the previous pickup roller. Note Circular and rectangular pegs on each side prevent you from incorrectly positioning the pickup roller. 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.

  • Page 45: Replacing The Printer Separation Pad

    Replacing the printer separation pad Note Before you change the separation pad, clean the pickup roller. See “Cleaning the printer pickup roller” on page 49 for instructions. If the input tray feeds more than one page at a time, you might have to replace the printer separation pad.

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    With one hand, reach through the input tray opening, and push the spring-loaded base down. With the other hand, position the new separation pad in the slot of the previous separation pad. Note The tab on the right is larger to help you position the separation pad correctly.

  • Page 47: Replacing The Copier/scanner Separation Pad

    Replacing the copier/ scanner separation pad If the optional copier/scanner feeds more than one page at a time, you might have to replace the copier/scanner separation pad. Recurring feed problems indicate that the pad is worn. Unplug the printer to turn the power off, and wait for the copier/scanner to cool.

  • Page 48: Cleaning The Equipment

    Cleaning the equipment WARNING! Before you perform these steps, unplug the printer to avoid shock hazard. To maintain quality, thoroughly clean the printer: Any time a new toner cartridge is installed. After printing approximately 2,500 pages. Whenever print quality problems appear. Clean the outside of the printer with a water-dampened cloth.

  • Page 49: Cleaning The Print Path

    Cleaning the print path Use this process if you discover toner specks or dots on printouts. This process produces a transparency with toner debris, which should be discarded. Note This process requires a transparency to remove dust and toner from the print paper path.

  • Page 50: Cleaning The Toner Cartridge Area

    Cleaning the toner cartridge area Cleaning the toner cartridge area can improve the quality of your printed sheets. WARNING! Before cleaning the printer, disconnect it from the power source and wait for the printer to cool. Open the toner cartridge door, and remove the toner cartridge.

  • Page 51: Cleaning The Printer Pickup Roller

    Cleaning the printer pickup roller If you want to clean the pickup roller rather than replace it, follow the instructions below: Remove the pickup roller as described in steps 1 through 5 of “Replacing the printer pickup roller” on page 41. Dampen a lint-free cloth in isopropyl alcohol, and scrub the roller.

  • Page 52: Cleaning The Printer Separation Pad

    Cleaning the printer separation pad If you want to clean the separation pad rather than replacing it, follow the instructions below: Remove the separation pad as described in steps 1 through 5 of “Replacing the printer separation pad” on page 43. Dab a lint-free cloth in isopropyl alcohol, and scrub the pad.

  • Page 53: Cleaning And Recalibrating The Copier/scanner, Cleaning The Scanner Path

    Cleaning and recalibrating the copier/scanner Recalibrating the copier/scanner The optional copier/scanner automatically calibrates to the white sheet opposite the image sensor at the beginning of each scan or copy job. Keep the white sheet clean to make sure the optional copier/scanner calibrates correctly.

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    Dampen a clean cotton cloth with isopropyl alcohol (pH7 or neutral pH). With the damp cloth, gently rub back and forth on the white sheet. Also, use the damp cloth to gently rub the rollers. WARNING! Alcohol is flammable. Keep the alcohol and cloth away from an open flame.

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    Operational overview Chapter contents Basic functions ........54 Formatter system .

  • Page 56: Basic Functions, Figure 13. Basic Configuration

    Basic functions This chapter presents a functional overview of the printer’s processes. The following systems are discussed: formatter printer functions • engine control unit (ECU) system/power system • image formation system • paper-feed system (printer) and optical system (optional copier/scanner) The printer has an optional copier/scanner.

  • Page 57: Formatter System

    Formatter system The formatter is responsible for the following: controlling the optional copier/scanner formatting and controlling copies receiving and processing print data from the printer interface monitoring the control panel and relaying printer status information developing and coordinating data placement and timing with the print engine communicating with the host computer through the bidirectional interface...

  • Page 58: Control Panel, Draft Mode, Enhanced I/o

    Control panel three front panel status lights (one contained in the button) button Draft mode Depending on which printer driver is used, selecting draft or EconoMode from the printer driver allows the printer to use approximately fifty percent less toner, extending the life of the toner cartridge.

  • Page 59: Pjl Overview

    PJL overview Printer Job Language (PJL) is an integral part of configuration, in addition to the standard Printer Command Language (PCL). With standard ECP cabling, PJL allows the printer to perform functions such as: Two-way communication with the host computer through a bidirectional parallel or USB connection.

  • Page 60: Printer Functions, Figure 14. Printer Unit Functional Block Diagram

    Printer functions 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 unit: Figure 14. Printer unit functional block diagram 58 Chapter 4 - Operational overview...

  • Page 61: Engine Control Unit/power System

    Engine control unit/power system The engine control unit (ECU) coordinates all print engine activities, drives the laser, and coordinates print data from the formatter with the image formation process. The ECU also includes power supply and distribution circuitry. Note In several other HP LaserJet products, the ECU is also known as the controller PCA or the DC controller PCA.

  • Page 62: Figure 15. Ecu Loads

    The following figure shows the various ECU loads: Figure 15. ECU loads 60 Chapter 4 - Operational overview...

  • Page 63: Figure 16. Overview Of Laser/scanner Operation

    Printer engine control system Paper motion monitoring and control The ECU controls paper motion in the printer by continuously monitoring the various paper sensors and coordinating the timing with the other print processes. For a detailed explanation of paper movement and the interaction of the photosensors and solenoid with the paper movement process, see “Printer paper-feed system”...

  • Page 64: Power System On Ecu

    Power system on ECU The AC, DC, and high-voltage power supply circuits are all contained within the ECU. AC power distribution The AC power circuitry supplies AC voltage whenever the power cord is connected to the AC power source. 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 65: Figure 17. High-voltage Power Supply Circuit

    High-voltage power distribution The high-voltage power supply applies an overlap of DC and AC voltage to the primary charging roller and the developing roller. This circuit also applies a positive or negative DC voltage to the transfer roller according to the instructions from the engine control unit. This circuit also controls the image density by changing the primary AC voltage and the developing AC bias according to the print density setting.

  • Page 66: Image Formation System, Figure 18. Image Formation Block Diagram

    Image formation system Laser printing requires the interaction of several different technologies including 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 seven processes: Figure 18.

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    Breakdown of the seven image formation processes 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 toner cartridge. The primary charging roller is coated with conductive rubber. An AC bias is applied to the roller to erase any residual charges from any previous image.

  • Page 68

    Separation stage—During this process, the media separates from the drum. To stabilize the feed system and prevent toner dropouts on the printed image at low temperature and humidity, the static eliminator reduces the charge on the back of the media. Fusing stage—During this process, the heat and pressure fuse the toner into the media to produce a permanent image.

  • Page 69: Printer Paper-feed System

    Printer paper-feed system Step 1 The main input tray and the priority input tray merge into one, main input area. Media placed in any of these areas enables the paper-out sensor (PS201), which informs the ECU that media is present. The following steps occur when the printer receives a print job: Step 2 The ECU enables the laser/scanner assembly and the motor.

  • Page 70: Figure 19. Printer Path

    Figure 19. Printer path 68 Chapter 4 - Operational overview...

  • Page 71: Jam Detection

    Jam detection The paper-out sensor (PS201) detects the presence of media in either the priority input tray or the main input tray. The paper top sensor (PS402) and the paper delivery sensor (PS401) detect media moving through the printer. If a jam is detected, the ECU immediately stops the printing process and displays a jam message on the control panel.

  • Page 72: Figure 20. Solenoid, Photosensors, And Switches

    Solenoid, photosensors, and switches The following figure shows the locations of the solenoid, photosensors, and switches. Figure 20. Solenoid, photosensors, and switches Paper delivery sensor (PS401) senses when paper has successfully moved out of the fusing area. Power switch. Note Products sold in North America do not have power switches.

  • Page 73: Optional Copier/scanner, Optical System, Document Pickup And Feed Systems

    Optional copier/scanner The optional copier/scanner consists of the optical system and the document pickup and feed systems. Optical system The optical system, also known as the contact image sensor, contains the following: light-emitting diode (LED) array contact glass rod lens array sensor array The light source has three LEDs and is controlled by the formatter.

  • Page 74: Figure 21. Copier/scanner Path

    Copier/scanner path The following figure shows the copier/scanner path. Figure 21. Copier/scanner path 72 Chapter 4 - Operational overview...

  • Page 75: Basic Sequence Of Operation (formatter-to-printer)

    Basic sequence of operation (formatter-to- printer) The operation sequence of the printer is controlled by the microprocessor (CPU) on the ECU. The following events take place during normal printer operation: Table 12. Basic sequence of operation Period Purpose Remarks WAIT To clear the drum surface of Detects whether or not the After the printer is turned on...

  • Page 76: Figure 22. General Timing Diagram

    Figure 22. General timing diagram 74 Chapter 4 - Operational overview...

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    Removal and replacement Chapter contents Removal and replacement strategy ....77 Required tools ....... 77 Before performing service .

  • Page 78: Table Of Contents

    Pickup roller shaft ......117 Paper lift plate assembly ..... . 118 Left plate assembly .

  • Page 79: Removal And Replacement Strategy, Required Tools

    Removal and replacement strategy This chapter documents the removal and replacement of field replaceable units (FRUs) only. Replacement is generally the reverse of removal. Occasionally, notes are included to provide directions for difficult or critical replacement procedures. WARNING! Unplug the power cord from the power outlet before attempting to service the printer.

  • Page 80: Before Performing Service, Toner Cartridge, Figure 23. Removing The Toner Cartridge

    Before performing service Remove all media from the printer. Unplug the power cable. Place the printer on an ESD mat. Remove the main input tray. If the optional copier/scanner is attached, remove the copier/ scanner media input tray and the copier/scanner output bin. Remove the toner cartridge (see page 78).

  • Page 81: Parts Removal Order

    Parts removal order Use the following diagram to determine which parts must be removed before removing other parts: Pickup roller Separation pad Transfer roller Left side cover Optional copier/scanner Back cover Right side cover Top cover Formatter Solenoid Fan assembly Control panel Front cover assembly Right plate assembly...

  • Page 82: Covers, Left Side Cover, Figure 24. Removing The Left Side Cover

    Covers Left side cover Open the toner cartridge door. Pull out on the notch (callout 1) on the back of the cover. Rotate the cover away from the printer. Figure 24. Removing the left side cover 80 Chapter 5 - Removal and replacement...

  • Page 83: Figure 25. Removing The Optional Copier/scanner, Optional Copier/scanner

    Optional copier/scanner CAUTION You must unplug the printer before removing or reinstalling the optional copier/scanner, or you might damage both the printer and the optional copier/scanner. Remove the left side cover (see page 80). Pull up on the ribbon cable to disconnect it from the connector (callout 1) on the formatter.

  • Page 84: Back Cover, Figure 26. Removing The Back Cover (1 Of 2)

    Back cover Remove the left side cover (see page 80). Open the straight-through output door. Remove two screws (callout 1) from the back of the printer. Figure 26. Removing the back cover (1 of 2) 82 Chapter 5 - Removal and replacement...

  • Page 85: Figure 27. Removing The Back Cover (2 Of 2)

    Press down and hold the two release levers (callout 1) and pull the cover off of the printer. Note The back cover has two tabs (not shown), one on each side of the printer. Step 4 releases these two tabs. Figure 27.

  • Page 86: Right Side Cover, Figure 28. Removing The Right Side Cover (1 Of 3)

    Right side cover Open the toner cartridge door. Remove the back cover (see page 82). Remove one screw (callout 1) on the back of the printer. Figure 28. Removing the right side cover (1 of 3) 84 Chapter 5 - Removal and replacement...

  • Page 87: Figure 29. Removing The Right Side Cover (2 Of 3)

    Lift the right side of the printer and release the tab (callout 1) on the bottom of the cover. Figure 29. Removing the right side cover (2 of 3) Covers 85...

  • Page 88: Figure 30. Removing The Right Side Cover (3 Of 3)

    While continuing to press the release tab, grasp the top of the cover and rotate it away from the printer. Figure 30. Removing the right side cover (3 of 3) 86 Chapter 5 - Removal and replacement...

  • Page 89: Top Cover, Figure 31. Removing The Top Cover

    Top cover If the printer has the optional copier/scanner attached, remove it (see page 81). Remove the left side, back, and right side covers (see pages 80 through 86), and open the toner cartridge door. Loosen two screws (callout 1) on the back of the printer. Remove two screws (callout 2) on the top of the printer.

  • Page 90: Control Panel Assembly, Figure 32. Removing The Control Panel

    Control panel assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Disconnect the control panel cable (callout 1) from the formatter. Remove two screws (callout 2 and callout 3) from the top of the control panel assembly.

  • Page 91: Front Cover Assembly, Figure 33. Removing The Front Cover (1 Of 2)

    Front cover assembly The front cover assembly is composed of three pieces: front cover (the frame that surrounds the main input tray) toner cartridge door front guide assembly (the internal shelf that attaches the front cover and the toner cartridge door to the printer) Front cover Remove the left side, back, right side, and top covers (see pages 80 through 87).

  • Page 92: Figure 34. Removing The Front Cover (2 Of 2)

    Pull the top of the front cover away from the printer to release the three tabs (callout 1). Lift the front of the printer to release the tabs on the bottom of the front cover. Remove the front cover. Figure 34. Removing the front cover (2 of 2) 90 Chapter 5 - Removal and replacement...

  • Page 93: Figure 35. Removing The Toner Cartridge Door (1 Of 2)

    Toner cartridge door Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove the control panel assembly (see page 88). Remove the front cover (see page 89). Open the toner cartridge door. Remove one screw (callout 1) from the bracket on the right side of the printer, and remove the bracket.

  • Page 94: Figure 36. Removing The Toner Cartridge Door (2 Of 2)

    Unhook the toner cartridge door hinge on the right side, and slide the toner cartridge door toward the left to remove it. Figure 36. Removing the toner cartridge door (2 of 2) To reinstall Lift the toner cartridge door hinge above the stop (callout 1). Otherwise, the toner cartridge door will not close.

  • Page 95: Figure 37. Removing The Front Guide Assembly (1 Of 3)

    Front guide assembly From the front of the printer, remove two screws (callout 1). Figure 37. Removing the front guide assembly (1 of 3) Covers 93...

  • Page 96: Figure 38. Removing The Front Guide Assembly (2 Of 3)

    On the right side, release the lower tab (callout 1) and the upper tab (callout 2). Figure 38. Removing the front guide assembly (2 of 3) 94 Chapter 5 - Removal and replacement...

  • Page 97: Figure 39. Removing The Front Guide Assembly (3 Of 3)

    On the left side, release the upper tab (callout 1) and the lower tab (callout 2). Remove the front guide assembly. Figure 39. Removing the front guide assembly (3 of 3) Covers 95...

  • Page 98: Internal Assemblies, Transfer Roller, Figure 40. Removing The Transfer Roller

    Internal assemblies Transfer roller Open the toner cartridge door and remove the toner cartridge (see page 78). Use needle nose pliers to gently squeeze the two small tabs on the transfer roller. Lift the transfer roller up, slide it to the right, and lift it out of the printer.

  • Page 99: Formatter, Figure 41. Removing The Formatter (1 Of 2)

    Formatter Remove the left side cover (see page 80). If the optional copier/scanner assembly is attached to the printer, disconnect the copier/scanner cable (callout 1) from the formatter. Disconnect the two flat flexible cables (callout 2) from the zero insertion force (ZIF) connectors on the formatter. Unplug the laser/scanner cable (callout 3) and the control panel cable (callout 4) from the formatter.

  • Page 100: Figure 42. Removing The Formatter (2 Of 2)

    Remove five screws (callout 1). Rotate the formatter up and off of the hooks on the chassis and remove it from the printer. Disconnect and remove the formatter shield. Figure 42. Removing the formatter (2 of 2) To reinstall When you reconnect the cable, make sure you lock the ZIF connectors back into place.

  • Page 101: Laser/scanner Assembly, Figure 43. Removing The Laser/scanner (1 Of 2)

    Laser/scanner assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Disconnect the flat flexible cable from its socket (callout 1) on the laser/scanner. Disconnect the cable connector (callout 2) from the formatter. Figure 43. Removing the laser/scanner (1 of 2) Internal assemblies 99...

  • Page 102: Figure 44. Removing The Laser/scanner (2 Of 2)

    Release the two tabs (callout 1), one on each side of the shutter lever, and lift the shutter lever straight up to remove it. Note Make sure you do not misplace the small spring that is under the shutter lever. Remove four screws (callout 2) and then lift the assembly off of the printer.

  • Page 103: Fuser Assembly, Figure 45. Removing The Fuser Assembly (1 Of 4)

    Fuser assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove two screws (callout 1) from the right fuser plate. Remove a third screw (callout 2) from behind the large gear on the right fuser plate. Note You can access the third screw through the holes in the 69Tgear.

  • Page 104: Figure 46. Removing The Fuser Assembly (2 Of 4)

    Remove three screws (callout 1) from the left fuser plate. Remove the bracket. Figure 46. Removing the fuser assembly (2 of 4) 102 Chapter 5 - Removal and replacement...

  • Page 105: Figure 47. Removing The Fuser Assembly (3 Of 4)

    Remove two screws (callout 1), one from each side of the printer. Figure 47. Removing the fuser assembly (3 of 4) Internal assemblies 103...

  • Page 106: Figure 48. Removing The Fuser Assembly (4 Of 4)

    Unplug the fuser cable connector (callout 1) by pressing and releasing the tab on the back of the connector. Unplug five smaller cable connectors (callout 2) from the ECU and unwind the cables from the fuser assembly. 10 Unplug the spade connector (callout 3). 11 Remove one screw (callout 4) from the paper delivery sensor, and lift the paper delivery sensor out of the printer.

  • Page 107: Output Rollers, Figure 49. Removing The Output Rollers (1 Of 2)

    Output rollers Face-down delivery assembly Remove the fuser assembly (see page 101). Remove two screws (callout 1) and lift the face-down delivery assembly away from the fuser assembly. Figure 49. Removing the output rollers (1 of 2) Internal assemblies 105...

  • Page 108: Figure 50. Removing The Output Rollers (2 Of 2)

    Face-up roller Turn the fuser assembly over. Remove the gear (callout 1) from the face-up roller and release the tab (callout 2) on the face-up roller bushing. Rotate the face-up roller bushing forward until the pin releases. Slide the face-up roller away from the gear side, and lift it out of the fuser assembly.

  • Page 109: Motor, Figure 51. Removing The Motor

    Motor Note You might find it easier to remove the ECU pan (see page 120) before you remove the motor. Remove the left side, back, and right side covers (see pages 80 through 86). Remove the fuser assembly (see page 101). Disconnect the motor cable connector (callout 1) on the side of the motor.

  • Page 110: Solenoid, Figure 52. Removing The Solenoid (1 Of 2)

    Solenoid Remove the left side, back, and right side covers (see pages 80 through 86). Unplug five cable connectors (callout 1) from the ECU and separate the solenoid cable from the other four cables. Carefully unwind the solenoid cable from the cable guides (callout 2).

  • Page 111: Figure 53. Removing The Solenoid (2 Of 2)

    Remove the screw (callout 1) on the solenoid. Gently thread the solenoid cable through the hole (callout 2) in the right side plate. Lift the solenoid off of the printer. Figure 53. Removing the solenoid (2 of 2) To reinstall It might be easier to remove the ECU pan (see page 120) before rerouting the cables through the hole (callout 2) in the right side plate.

  • Page 112: Fan Assembly, Figure 54. Removing The Fan (1 Of 2)

    Fan assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Unplug the five cable connectors (callout 1) from the ECU and separate the fan cable from the other four cables. Carefully unwind the fan cable from the cable guides (callout 2). Figure 54.

  • Page 113: Figure 55. Removing The Fan (2 Of 2)

    Remove two screws (callout 1). Remove the fan assembly. Gently thread the fan cable through the hole (callout 2) in the right side plate. Lift the fan assembly off of the printer. Figure 55. Removing the fan (2 of 2) To reinstall It might be easier to remove the ECU pan (see page 120) before rerouting the cables through the hole (callout 2) in the right side plate.

  • Page 114: Right Plate Assembly, Figure 56. Removing The Right Plate Assembly (1 Of 2)

    Right plate assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove the front cover, toner cartridge door, and front guide assembly (see pages 89 through 95). Remove the solenoid (see page 108). Remove the fan assembly (see page 110).

  • Page 115: Figure 57. Removing The Right Plate Assembly (2 Of 2)

    Remove seven screws (callout 1). If you have not already removed the fuser, remove the fuser screw (callout 2). Lift the right plate assembly off of the printer. Figure 57. Removing the right plate assembly (2 of 2) Internal assemblies 113...

  • Page 116: Pickup Assembly, Figure 58. Removing The Pickup Assembly (1 Of 3)

    Pickup assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove the front cover, toner cartridge door, and front guide assembly (see pages 89 through 95). Remove the right plate assembly (see page 112). Remove one screw (callout 1).

  • Page 117: Figure 59. Removing The Pickup Assembly (2 Of 3)

    Remove two screws (figure 1) on the top of the assembly. Figure 59. Removing the pickup assembly (2 of 3) Internal assemblies 115...

  • Page 118: Figure 60. Removing The Pickup Assembly (3 Of 3)

    Lift the upper metal shield (callout 1) straight up and remove it from the printer. Lift the lower metal shield (callout 2) straight up and remove it from the printer. Figure 60. Removing the pickup assembly (3 of 3) 116 Chapter 5 - Removal and replacement...

  • Page 119: Pickup Roller Shaft, Figure 61. Removing The Pickup Roller Shaft

    Pickup roller shaft Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove the front cover, toner cartridge door, and front guide assembly (see pages 89 through 95). Remove the right plate assembly (see page 112). Remove the pickup assembly (see page 114).

  • Page 120: Paper Lift Plate Assembly, Figure 62. Removing The Paper Lift Plate Assembly

    Paper lift plate assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove the front cover, toner cartridge door, and front guide assembly (see pages 89 through 95). Remove the right plate assembly (see page 112), the pickup assembly (see page 114), and the pickup roller shaft (see page 117).

  • Page 121: Left Plate Assembly, Figure 63. Removing The Left Plate Assembly

    Left plate assembly Remove the left side, back, right side, and top covers (see pages 80 through 87). Remove the front cover, toner cartridge door, and front guide assembly (see pages 89 through 95). Remove the formatter (see page 97). Remove six screws (callout 1).

  • Page 122: Bottom Assemblies, Figure 64. Removing The Ecu Pan (1 Of 4), Ecu Pan

    Bottom assemblies ECU pan Remove the left side, back, and right side covers (see pages 80 through 86). Unplug the three spade connectors (callout 1). Disconnect the motor cable connector (callout 2) on the side of the motor. Unplug the fuser cable connector (callout 3) by pressing and releasing the tab on the back of the connector.

  • Page 123: Figure 65. Removing The Ecu Pan (2 Of 4)

    Unplug the flat flexible cable from the ZIF connector (callout 1) on the formatter. Remove two screws (callout 2) on each side of the printer. Figure 65. Removing the ECU pan (2 of 4) Bottom assemblies 121...

  • Page 124: Figure 66. Removing The Ecu Pan (3 Of 4)

    Gently pull the two sides of the printer away from the ECU pan to release the ECU pan. Slide the ECU pan out and away from the printer. Note The entire ECU board can be replaced as a single unit. (Only soldered cables ship with the replacement board;...

  • Page 125: Figure 67. Removing The Ecu Pan (4 Of 4)

    Remove five screws (callout 1). 10 Lift the ECU out of the ECU pan. Figure 67. Removing the ECU pan (4 of 4) Bottom assemblies 123...

  • Page 126: Paper-feed Assembly, Figure 68. Removing The Paper-feed Assembly (1 Of 4)

    Paper-feed assembly Remove the left side, back, and right side covers (see pages 80 through 86). Remove the right plate assembly (see page 112). Remove the ECU pan (see page 120). Unwind the fan and solenoid cables from the cable guides (callout 1) on the paper-feed mechanism.

  • Page 127: Figure 69. Removing The Paper-feed Assembly (2 Of 4)

    Separate two bushings (on the bottom of the paper-feed mechanism) from the paper-feed roller shaft (callout 1), and lift the paper-feed mechanism up and out of the printer. Figure 69. Removing the paper-feed assembly (2 of 4) To reinstall Insert the bottom of the sensor flag into the hole (callout 2) in front of the paper-feed roller shaft.

  • Page 128: Figure 70. Removing The Paper-feed Mechanism (3 Of 4)

    Use needle nose pliers to push the two tabs away from the end of the paper-feed roller shaft. Note You might find it easier to first remove the right plate assembly (see page 112). Do not remove the gear shield, because the gears and springs can easily separate and become misplaced.

  • Page 129: Figure 71. Removing The Paper-feed Mechanism (4 Of 4)

    To reinstall Insert the two tabs (callout 1) on the paper-feed assembly into the two recesses on the printer. Insert the bottom of the sensor flag into the hole in front of the paper- feed roller shaft (see callout 2 on page 125). The top of the sensor flag (callout 2) should move freely.

  • Page 130

    128 Chapter 5 - Removal and replacement...

  • Page 131

    Troubleshooting Chapter contents Basic troubleshooting ......130 Errors ......... . 132 Control panel light messages .

  • Page 132: Basic Troubleshooting

    Basic troubleshooting Table 13. Basic troubleshooting Verification steps Possible problems Solutions Does the printer turn No power. 1. Verify that the product is plugged in. 2. Verify that the power cable is functional on successfully? and that the power switch is on (220v only). When the product is 3.

  • Page 133

    Table 13. Basic troubleshooting (continued) Verification steps Possible problems Solutions Is the software Software is not installed, Uninstall and then reload the product or an error occurred software. Make sure you use the correct installed correctly? during software installation procedure and the correct port installation.

  • Page 134: Errors, Control Panel Light Messages, Figure 72. Control Panel Location

    Errors Control panel light messages Each control panel light message is listed, along with possible causes and steps to resolve identified errors. Figure 72. Control panel location 132 Chapter 6 - Troubleshooting...

  • Page 135

    Table 15. Control panel light messages Message Possible causes Solutions No action is needed. The printer is ready to print. To print a self-test page, press and release the button on the control panel. The printer is receiving or processing Wait for the job to print.

  • Page 136

    Table 15. Control panel light messages (continued) Message Possible causes Solutions A printer initialization is taking place. If all No action is necessary. lights blink for a half second or longer in a sequence: The printing is initializing. All previously sent print jobs are being deleted from the printer memory.

  • Page 137: Fatal Error Secondary Messages

    Fatal error secondary messages If the printer has a fatal error, press and hold the button to see the secondary error message. Table 16. Fatal error secondary messages Message Cause Solution Engine error. The formatter and engine 1. Unplug the printer and plug it back in. are not communicating.

  • Page 138

    Table 16. Fatal error secondary messages (continued) Message Cause Solution Formatter internal RAM or ROM error. 1. Unplug the printer and plug it back in. The RAM or ROM has an error. 2. Unplug the printer, remove any optional memory, and turn the printer back on.

  • Page 139: Checking The Toner Cartridge

    Checking the toner cartridge Image formation defects are many times the result of problems in the toner cartridge. If there is any doubt, always replace the toner cartridge before troubleshooting image defects. Use the following checklist to make sure that the toner cartridge is still operable.

  • Page 140: Solving Image-quality Problems, Solving Print Image-quality Problems

    Solving image-quality problems Use the following tables to help solve problems with printed pages. If the problem occurs when printing, see table 17, “Solving print image-quality problems,” on page 138. If the problem occurs when copying or scanning (and if the printer has the optional copier/scanner assembly attached), see table 18, “Solving copying and scanning image-quality problems,”...

  • Page 141

    Table 17. Solving print image-quality problems (continued) Problem Cause Solution Toner specks The media you are using does not meet Make sure that the media meets HP’s specifications (for example, it is too specifications detailed in the Print Media appear on the moist or too rough).

  • Page 142

    Table 17. Solving print image-quality problems (continued) Problem Cause Solution The printed The priority input tray is not in place. Adjust the priority input tray. page has a The print density setting is set too high. Decrease the amount of background gray shading through the device configuration background.

  • Page 143

    Table 17. Solving print image-quality problems (continued) Problem Cause Solution Repetitive If the repetitive mark occurs at equal Use the defect ruler to identify the distance between marks, either the toner spacing. Check the appropriate vertical cartridge or a printer roller is damaged. component and replace if necessary.

  • Page 144

    Table 17. Solving print image-quality problems (continued) Problem Cause Solution The printed The environment is too warm or too 1. Both high temperatures and high humid. humidity levels cause media to curl. page has curls Move the printer to a different or waves.

  • Page 145: Solving Copying And Scanning Image-quality Problems

    Solving copying and scanning image-quality problems Table 18. Solving copying and scanning image-quality problems Problem Cause Solution Pages do not The printer is not plugged in. Make sure that the printer is plugged into a live wall outlet or power strip. print.

  • Page 146

    Table 18. Solving copying and scanning image-quality problems (continued) Problem Cause Solution Copies or The contrast is not set correctly. 1. Adjust the contrast and resolution settings from the HP LaserJet Copier scanned software. images are too 2. Adjust the Quick Copy settings. light or too 3.

  • Page 147

    Table 18. Solving copying and scanning image-quality problems (continued) Problem Cause Solution Scanned text The contrast, resolution, or brightness 1. Adjust the contrast and resolution needs to be adjusted before scanning. settings from the HP LaserJet Copier. is not clear. 2.

  • Page 148: Solving Paper-feed Problems, Solving Print Paper-feed Problems

    Solving paper-feed problems Use the following tables to solve problems related to moving paper or documents through the printer. If the problem occurs when copying or scanning (and if the printer has the optional copier/scanner assembly attached), see table 20, “Solving copying and scanning paper-feed problems,”...

  • Page 149

    Table 19. Solving print paper-feed problems (continued) Problem Cause Solution The printer Paper guides are not adjusted properly. Slide the guides against the sides of the stack in the main input tray or the priority feeds multiple input tray to center the paper. Make sure sheets or jams the guides are not adjusted too tightly.

  • Page 150: Solving Copying And Scanning Paper-feed Problems

    Solving copying and scanning paper-feed problems Table 20. Solving copying and scanning paper-feed problems Problem Cause Solution Long pages The document is too long. The maximum document length is 889 mm (35 inches). If your document is too stop feeding long, copy each segment of it and scan through the the copies.

  • Page 151: Functional Checks, Engine Test, Figure 73. Engine Test Switch

    Functional checks Engine test The engine test is used to verify that the print engine is functioning correctly. The formatter is bypassed during an engine test, so the engine test is useful for isolating printer problems. The engine test prints horizontal lines down the entire printable area of a page and is also useful for checking and adjusting registration.

  • Page 152: Half Self-test Functional Check

    Half self-test functional check The electrophotographic 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) development stage (forms a toner image on the drum) transfer stage (transfers the image to paper) cleaning stage (removes excess toner from the drum) fusing stage (applies heat and pressure to make the image on...

  • Page 153: Drum Rotation Functional Check

    Drum rotation functional check The photosensitive drum, located in the toner cartridge, must rotate for the print process to work. The photosensitive drum receives its drive from the main drive assembly. Note This test is especially important if refilled toner cartridges have been used.

  • Page 154: Heating Element Check, Figure 74. Locating Connectors For The Heating Element Check

    Heating element check Paper passes between the heating element and a soft pressure roller to fuse toner to the paper. Unplug the printer for at least ten minutes. Verify that the thermistor connector is seated into both the printer chassis and the ECU. Remove the heating element connector (callout 1) from the ECU.

  • Page 155: High-voltage Power Supply Check, Figure 75. Toner Cartridge High-voltage Connection Points (right Side)

    High-voltage power supply check The high-voltage power supply PCA provides the necessary voltages for the electrophotographic processes. To check the toner cartridge connection points Turn the toner cartridge over and visually inspect the three connection points on the ends of the toner cartridge: drum ground (callout 1), charging (callout 2), and developing roller (callout 3).

  • Page 156: Figure 77. High-voltage Connector Assembly (right Side), Figure 78. High-voltage Connector Assembly (left Side)

    To check the high-voltage connector assembly The assembly uses three spring-loaded pins to contact the toner cartridge: drum ground (callout 1), charging (callout 2), and developing roller (callout 3). Verify that the pins are not dirty or corroded and that the spring-loading action is functional. If the pins are dirty, clean them using isopropyl alcohol only.

  • Page 157: Paper Path Check, Figure 79. Overriding Sw301

    Paper path check If paper is not being picked up or is not moving through the paper path, you might want to observe all of the paper motion activities. Overriding the door interlock (SW301) allows you to observe: motor rotation solenoid action kick plate motion paper pickup roller motion...

  • Page 158: Service Mode Functions, Nvram Initialization/cold Reset, Pjl Software Commands

    Service mode functions NVRAM initialization/cold reset NVRAM initializer sets all default variables stored in NVRAM back to factory default values or to a default ROM value, depending on the variable. It also performs a system reset. NVRAM initializer resets the following: all menu settings to factory default values factory settings such as formatter number, page counts, factory paper settings...

  • Page 159

    The table below provides a more detailed description of the NVRAM PJL factory variables and commands and shows possible settings for each. Table 21. NVRAM PJL factory variables NVRAM PJL variable or command Possible settings DEFAULT PAPER LETTER, LEGAL, A4, EXECUTIVE, COM10, MONARCH, DL, C5, B5, CUSTOM, JISB5, ISOB5, JPOST, JPOSTTD, A5, FOOLSCAP...

  • Page 160: Nvram Pjl Factory Variables

    NVRAM PJL factory variables To use these commands, you need some method to send PJL commands to the printer, either with a software tool or by copying a binary file that contains the commands from the host using a DOS box.

  • Page 161: Troubleshooting Tools, Internal Reports

    Troubleshooting tools Internal reports Use the control panel to print self-test pages, which show the print settings. To print a self-test page When the printer is in the ready state, press the button. A self-test page will print. Information found on the self-test page The self-test page has the following fields: Product Information, Memory, Installed Personalities and Options, Print Settings, and Page Counts (including pages jammed in printer, pages mispicked in...

  • Page 162: Figure 80. Self-test

    Note These fields are only visible with the optional copier/scanner installed or with the HP LaserJet 1220. Figure 80. Self-test page 160 Chapter 6 - Troubleshooting...

  • Page 163: Repetitive Image Defect Ruler, Figure 81. Repetitive Image Defect Ruler

    Repetitive image defect ruler First occurrence of print defect Toner/developing cylinder (37.7 mm) Toner/primary charging roller (37.7 mm) Transfer roller (45.2 mm) Heating element (56.5 mm) Pressure roller (62.8 mm) Toner/drum (75.4 mm) Figure 81. Repetitive image defect ruler Troubleshooting tools 161...

  • Page 164: Main Wiring, Figure 82. Main Wiring (1 Of 2)

    Main wiring Figure 82. Main wiring (1 of 2) 162 Chapter 6 - Troubleshooting...

  • Page 165: Figure 83. Main Wiring (2 Of 2)

    Figure 83. Main wiring (2 of 2) Troubleshooting tools 163...

  • Page 166: Locations Of Connectors, Figure 84. Locations Of Printer Connectors, Figure 85. Locations Of Copier/scanner Connectors

    Locations of connectors Figure 84. Locations of printer connectors Figure 85. Locations of copier/scanner connectors 164 Chapter 6 - Troubleshooting...

  • Page 167: Locations Of Leds, Jumpers, And Switches, Figure 86. Locations Of Leds, Jumpers, And Switches

    Locations of LEDs, jumpers, and switches Figure 86. Locations of LEDs, jumpers, and switches Table 22. Switch functions SW number Function Remarks SW101 Power switch 220-240V only SW201 Switch for test print SW301 Switch for detection of open door Troubleshooting tools 165...

  • Page 168

    166 Chapter 6 - Troubleshooting...

  • Page 169

    Parts and diagrams Chapter contents Ordering parts and supplies ......168 Parts ........168 Related documentation and software .

  • Page 170: Ordering Parts And Supplies, Parts, Related Documentation And Software, Consumables

    Ordering parts and supplies Parts Order replacement parts from the following website: http://www.hp.com/ssg/parts/direct_order.html Related documentation and software Order documentation and software from the companies listed in table 23; some documentation and software is available at the following websites: Table 23. Technical support websites HP Customer Care Online http://www.hp.com/go/support Software drivers, support...

  • Page 171: Accessories

    Accessories Table 24. Accessories Item Description Part number Dual in-line 8 MB C7842A memory modules 16 MB C7843A (DIMMs) 32 MB C7845A 64 MB C7846A Toner cartridge 2,500 page cartridge C7115A 3,500 page cartridge C7115X Cables and 2-meter IEEE-1284 parallel cable C2950A interface 3-meter IEEE-1284 parallel cable...

  • Page 172

    Table 24. Accessories (continued) Power modules Japan 0950-3173 (continued) INPUT: 100 Vac 50 Hz OUTPUT: 13 VDC @ 300 ma Japan 0950-3352 INPUT: 100 Vac 50 Hz OUTPUT: 13 VDC @ 800 ma South Korea 9100-5168 INPUT: 220-240 Vac 50 Hz OUTPUT: 13 VDC @ 625 ma South Korea 0950-3351...

  • Page 173: How To Use The Parts Lists And Diagrams, Common Hardware

    How to use the parts lists and diagrams The figures in this chapter illustrate the major subassemblies in the printer and their component parts. A table (material list) follows each exploded assembly diagram. Each table lists the reference designator, the associated part number for the item, and a description of the part.

  • Page 174: Assembly Locations, Printer Trays & Optional Copier/scanner, Figure 87. Assembly Locations

    Assembly locations Printer trays & optional copier/scanner Figure 87. Assembly locations 172 Chapter 7 - Parts and diagrams...

  • Page 175: Part Numbers

    Part numbers Table 26. Printer trays and optional copier/scanner Ref. Part number Description Qty. RG0-1013-000CN Printer pickup tray assembly RG0-1014-000CN Paper pickup cover assembly R37-5020-000CN Optional copier/scanner RG0-1069-000CN Copier/scanner pickup tray assembly RG0-1070-000CN Face-down tray assembly RY7-5055-000CN Copier/scanner separation pad Assembly locations 173...

  • Page 176: Figure 88. Covers, Covers

    Covers Figure 88. Covers 174 Chapter 7 - Parts and diagrams...

  • Page 177

    Part numbers Table 27. Covers Ref. Part number Description Qty. RA0-1177-000CN Cover, front RA0-1178-000CN Cover, right side RA0-1179-000CN Cover, left side RA0-1183-000CN Cover, connector RA0-1016-000CN Back cover assembly RG0-1017-000CN Top cover assembly RG0-1015-000CN Toner cartridge door assembly 7121-8042 HP Jewel RY7-5082-000CN Screw kit (contains a full set of screws for the LaserJet 1200...

  • Page 178: Internal Components (1 Of 2), Internal Assemblies, Figure 89. Internal Components (1 Of 2)

    Internal assemblies Internal components (1 of 2) Figure 89. Internal components (1 of 2) 176 Chapter 7 - Parts and diagrams...

  • Page 179

    Part numbers Table 28. Internal components (1 of 2) Ref. Part number Description Qty. RA0-1181-000CN Shutter guide RA0-1182-000CN Shutter lever RA0-1169-000CN Compression spring RG9-1486-000CN Laser/scanner assembly RG0-1074-000CN Cable, laser/scanner RG0-1020-000CN Pickup gear assembly RA0-1184-000CN Cover, right support RF0-1008-000CN Pickup roller RA0-1172-000CN Gear, 17T RG9-1483-000CN Transfer roller...

  • Page 180: Internal Components (2 Of 2), Figure 90. Internal Components (2 Of 2)

    Internal components (2 of 2) Figure 90. Internal components (2 of 2) 178 Chapter 7 - Parts and diagrams...

  • Page 181

    Part numbers Table 29. Internal components (2 of 2) Ref. Part number Description Qty. RG0-1022-000CN Front guide assembly RG0-1030-000CN Fan assembly RA0-1173-000CN Lever holder RA0-1174-000CN Lever RA0-1175-000CN Tension spring RA0-1185-000CN Fuser plate, left RA0-1186-000CN Fuser plate, right RH7-5284-000CN Solenoid, DC24V RA0-1176-000CN Gear, 69T RA0-1023-000CN...

  • Page 182: Electrical Components, Figure 91. Electrical Components

    Electrical components Figure 91. Electrical components 180 Chapter 7 - Parts and diagrams...

  • Page 183

    Part numbers Table 30. Electrical components Ref. Part number Description Qty. RA0-1127-000CN Engine controller case RA0-1128-000CN PCB spacer WT2-5694-000CN Clamp, cable RG0-1012-000CN Engine controller PCB assembly, 110-127V RG0-1029-000CN Engine controller PCB assembly, 220-240V Internal assemblies 181...

  • Page 184: Paper Pickup Assembly (1 Of 2), Figure 92. Paper Pickup Assembly (1 Of 2)

    Paper pickup assembly (1 of 2) Figure 92. Paper pickup assembly (1 of 2) 182 Chapter 7 - Parts and diagrams...

  • Page 185

    Part numbers Table 31. Paper pickup assembly (1 of 2) Ref. Part number Description Qty. RG0-1003-000CN Paper pickup assembly RA0-1072-000CN Grounding plate RA0-1035-000CN Torsion spring RY7-5081-000CN Clutch kit RG0-1007-000CN Paper pickup shaft assembly RG0-1005-000CN Feed roller holder assembly RG0-1072-000CN Paper sensor PCB assembly RA0-1200-000CN Torsion spring Internal assemblies 183...

  • Page 186: Paper Pickup Assembly (2 Of 2), Figure 93. Paper Pickup Assembly (2 Of 2)

    Paper pickup assembly (2 of 2) Figure 93. Paper pickup assembly (2 of 2) 184 Chapter 7 - Parts and diagrams...

  • Page 187

    Part numbers Table 32. Paper pickup assembly (2 of 2) Ref. Part number Description Qty. RA0-1003-000CN Foot, rubber (paper pickup assembly) RG0-1006-000CN Paper lift plate assembly RF0-1014-000CN Separation pad Internal assemblies 185...

  • Page 188: Figure 94. Fuser Assembly, Fuser Assembly

    Fuser assembly Figure 94. Fuser assembly 186 Chapter 7 - Parts and diagrams...

  • Page 189

    Part numbers Table 33. Fuser assembly Ref. Part number Description RG0-1008-000CN Fuser assembly, 110V RG0-1026-000CN Fuser assembly, 220V RF0-1003-000CN Face-up roller RG0-1010-000CN Face-down delivery assembly RA0-1088-000CN Gear, 29T RA0-1089-000CN Gear, 17T (fuser assembly) RA0-1104-000CN Bushing RG0-1082-000CN Delivery sensor PCB assembly Internal assemblies 187...

  • Page 190: Alphabetical Parts List

    Alphabetical parts list Table 34. Alphabetical parts list Description Part number Ref. Figure Back cover assembly RA0-1016-000CN Bushing RA0-1104-000CN Cable, laser/scanner RG0-1074-000CN Cable, laser/scanner flat flexible RH2-5440-000CN Clamp, cable WT2-5694-000CN Clutch kit RY7-5081-000CN Compression spring RA0-1169-000CN Connecting Link RA0-1023-000CN Control panel assembly RG0-1024-000CN Copier/scanner pickup tray assembly RG0-1069-000CN...

  • Page 191

    Table 34. Alphabetical parts list (continued) Description Part number Ref. Figure Front guide assembly RG0-1022-000CN Fuser assembly, 110V RG0-1008-000CN Fuser assembly, 220V RG0-1026-000CN Fuser plate, left RA0-1185-000CN Fuser plate, right RA0-1186-000CN Gear, 17T RA0-1172-000CN Gear, 17T (fuser assembly) RA0-1089-000CN Gear, 29T RA0-1088-000CN Gear, 69T RA0-1176-000CN...

  • Page 192

    Table 34. Alphabetical parts list (continued) Description Part number Ref. Figure Toner cartridge door assembly RG0-1015-000CN Top cover assembly RG0-1017-000CN Torsion spring RA0-1035-000CN Torsion spring RA0-1200-000CN Transfer roller RG9-1483-000CN 190 Chapter 7 - Parts and diagrams...

  • Page 193: Numerical Parts List

    Numerical parts list Table 35. Numerical parts list Part Number Description Ref. Figure 7121-8042 HP jewel C515-2672 Formatter screws C7044-00001 RFI shield C7044-0001 Formatter shield C7857-60001 Formatter R37-5020-000CN Optional copier/scanner RA0-1003-000CN Foot, rubber (paper pickup assembly) RA0-1016-000CN Back cover assembly RA0-1023-000CN Connecting Link RA0-1035-000CN...

  • Page 194

    Table 35. Numerical parts list (continued) Part Number Description Ref. Figure RA0-1200-000CN Torsion spring RF0-1003-000CN Face-up roller RF0-1008-000CN Pickup roller RF0-1014-000CN Separation pad RG0-1001-000CN Right plate assembly RG0-1002-000CN Left plate assembly RG0-1003-000CN Paper pickup assembly RG0-1005-000CN Feed roller holder assembly RG0-1006-000CN Paper lift plate assembly RG0-1007-000CN...

  • Page 195

    Table 35. Numerical parts list (continued) Part Number Description Ref. Figure RY7-5081-000CN Clutch kit RY7-5082-000CN Screw kit (contains a full set of screws for the LaserJet 1200 product) WT2-5694-000CN Clamp, cable Numerical parts list 193...

  • Page 196

    194 Chapter 7 - Parts and diagrams...

  • Page 197

    Index Numerics blinking lights 132 block diagrams 69T gear, removing 101 image formation 64 printer functions 58 bpp (bits per pixel), maximum 14 AC bias 65 breaking paper reams 147 AC power distribution 62 buffer memory 56 accessories, ordering 169 business cards, copying or scanning 34 accessory errors, troubleshooting 134 buttons...

  • Page 198

    checklists control panel, printer preservice 78 buttons and lights 29 toner cartridge inspection 137 light messages 132 troubleshooting 130 locating 20 checks removing 88 drum rotation 151 troubleshooting 130 engine 149 controller PCA. See ECU half-self-test 150 copier/scanner heating element 152 cleaning 51 high-voltage power supply 153 connection, locating 21...

  • Page 199

    delivery sensor, paper (PS401) feeding operations 67 cables 122 jam detection operations 69 electrical components 181 delivery-stationary jams 69 errors 135 density functions 59 operations 63 jam detection operations 69 troubleshooting 139 laser/scanner operations 61 developing roller 63 loads 60 developing stage, image formation process 65 paper feeding operations 67 dimensions, product 16, 28...

  • Page 200

    feed assembly, removing 124 guide assembly, removing 93 feed system, paper 67 guides feeding problems, troubleshooting cleaning 140 copier/scanner 148 locating 20, 22 frequent 40 troubleshooting 148 printer 146 field replaceable units (FRUs) part numbers 171 half-self-test functional check 150 procedures for replacing 77 hardware features 14 film, transparency...

  • Page 201

    INTR (Initial Rotation Period) 73 light copies or scans, troubleshooting 144 isolated job settings 57 lights, printer control panel isopropyl alcohol, cleaning with error messages 132 high-voltage connection points 153, 154 locating 29 pickup roller 49 lines, troubleshooting printer separation pad 50 copies or scans 143, 144 scanner path 52 printed pages 139...

  • Page 202

    model number 19 ordering parts and supplies 168 motor originals, loading 34, 36 copier/scanner (M1) 71 output bin errors 135 capacity 14 operations 61 locating 22 removing 107 long media extension, locating 20 rotation, observing 155 printing to 37 troubleshooting 130 output path MS-DOS commands, PJL 158 cleaning 47...

  • Page 203

    paper path pins cleaning 47 heating element 152 selecting 37 high-voltage power supply 154 testing 155 PJL (Printer Job Language) paper pickup assembly commands, using 158 diagrams and part numbers 172, 182 features 57 removing 114 NVRAM variables 156, 157 paper pickup roller.

  • Page 204

    printer pickup roller reports, printing 159 cleaning 49 residual paper jams 69 life expectancy 40 resistance, heating element 152 observing 155 resizing scanned images 145 operations 67 Resolution Enhancement technology (REt) 15 replacing 41 resolution, maximum 14 shaft, removing 117 restoring factory defaults 156 printer separation pad revision level 19...

  • Page 205

    sequence star screws 171 operations 73 static eliminator, operations 66 printed pages 37 static, precautions for 77 removing parts 79 stationary jams 69 troubleshooting steps 130 status information, relaying 55, 57 serial number 19 STBY (Standby) period 73 SERVICEMODE 158 storage environment, specifications 16 settings storing paper 146...

  • Page 206

    toner cloth, ordering 170 vacuums, cautions against 48 image formation operations 65 variables, NVRAM 156, 157 loose, troubleshooting 140 ventilation requirements 28 redistributing 137 vertical black streaks, troubleshooting 144 scattered, troubleshooting 142 vertical defects, troubleshooting 141 smears, troubleshooting 140 vertical lines, troubleshooting 139 specks, troubleshooting 139, 142 vertical white stripes, troubleshooting 143 waste cleaning operations 66...

  • Page 208

    © 2001 Hewlett-Packard Company http://www.hp.com/support/lj1200 *C7044-90906* *C7044-90906* C7044-90906...

This manual also for:

Laserjet 1200 series

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