HP LaserJet Pro 400 M401 Printer Series Repair Manual ENWW Laser Jet
User Manual: HP LaserJet Pro 400 M401 shared.swissparts.ch - /Manuals/HP/LaserJet/Mono Laserjet/
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LASERJET PRO 400 Repair Manual M401 HP LaserJet Pro 400 M401 Printer Series Repair Manual Copyright and License Trademark Credits © 2012 Copyright Hewlett-Packard Development Company, L.P. Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Part number: CF270-90977 Edition 2, 10/2012 Conventions used in this guide TIP: Tips provide helpful hints or shortcuts. NOTE: Notes provide important information to explain a concept or to complete a task. CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the product. WARNING! Warnings alert you to specific procedures that you should follow to avoid personal injury, catastrophic loss of data, or extensive damage to the product. ENWW iii iv Conventions used in this guide ENWW Table of contents 1 Removal and replacement ................................................................................................ 1 Removal and replacement strategy ............................................................................................. 2 Electrostatic discharge ............................................................................................... 2 Required tools ........................................................................................................... 3 Types of screws ........................................................................................................ 3 Service approach ..................................................................................................................... 3 Before performing service .......................................................................................... 3 After performing service ............................................................................................. 4 Post-service test ......................................................................................................... 4 Print-quality test .......................................................................................... 4 Parts removal order ................................................................................................... 5 Removal and replacement procedures ........................................................................................ 6 Rollers ..................................................................................................................... 6 Multipurpose (MP) tray pickup roller ............................................................. 6 Multipurpose (MP) tray separation pad ......................................................... 6 Tray 2 and optional Tray 3 pickup roller ....................................................... 8 Tray 2 and optional Tray 3 separation pad ................................................... 9 Covers and control panel ......................................................................................... 10 Left cover ................................................................................................ 10 Right cover .............................................................................................. 12 Top cover with LCD control-panel module .................................................... 13 LCD control panel .................................................................................... 14 Top cover with touchscreen control-panel module ......................................... 16 Touchscreen control panel ......................................................................... 18 Rear cover, rear door, and feed assembly ................................................... 20 Cartridge door and front cover assembly .................................................... 23 Main assemblies ..................................................................................................... 26 Laser scanner assembly ............................................................................. 26 Registration roller assembly ....................................................................... 27 Fuser assembly and paper feed guide ......................................................... 29 Face down drive or duplex drive assembly .................................................. 32 Solenoids ............................................................................................................... 34 ENWW v Tray 1 solenoid ........................................................................................ 34 Duplex solenoid ....................................................................................... 35 Motors and fans ...................................................................................................... 37 Main motor ............................................................................................. 37 Fan ........................................................................................................ 39 Printed circuit-board assemblies (PCAs) ...................................................................... 41 Engine controller assembly (DC controller) PCA ............................................ 41 Universal serial bus (USB) PCA .................................................................. 46 Formatter PCA ......................................................................................... 48 Wireless PCA .......................................................................................... 48 Power switch PCA .................................................................................... 49 Connecting PCA ...................................................................................... 51 Miscellaneous parts ................................................................................................. 52 Transfer roller .......................................................................................... 52 Multipurpose (MP) tray pickup gear assembly .............................................. 52 Optional paper feeder (Tray 3) ................................................................................. 53 Optional paper feeder right cover .............................................................. 54 Optional paper feeder driver PCA .............................................................. 54 Optional paper feeder paper sensor PCA ................................................... 55 2 Parts and diagrams ........................................................................................................ 59 Order parts by authorized service providers .............................................................................. 60 Order replacement parts .......................................................................................... 60 Related documentation and software ......................................................................... 60 Supplies part numbers ............................................................................................. 60 Whole-unit replacement part numbers ........................................................................ 60 How to use the parts lists and diagrams .................................................................................... 62 Assembly locations ................................................................................................................. 63 HP LaserJet M401a, M401n, M401d models ............................................................. 63 HP LaserJet M401dn and M401dw models ................................................................ 64 Optional paper feeder ............................................................................................. 65 Covers, panels, and doors ...................................................................................................... 66 Internal assemblies ................................................................................................................. 70 Input devices ......................................................................................................................... 82 500-sheet paper feeder ........................................................................................... 82 Paper feeder covers .................................................................................. 82 Paper feeder main body (1 of 2) ................................................................ 84 Paper feeder main body (2 of 2) ................................................................ 86 Alphabetical parts list ............................................................................................................. 88 Numerical parts list ................................................................................................................ 93 vi ENWW Index ................................................................................................................................. 99 ENWW vii viii ENWW List of tables Table 2-1 Order parts, accessories, and supplies .................................................................................... 60 Table 2-2 Related documentation and software ...................................................................................... 60 Table 2-3 Supplies part numbers ........................................................................................................... 60 Table 2-4 Whole-unit replacement part numbers ..................................................................................... 60 Table 2-5 Assembly locations: HP LaserJet M401a, M401n, M401d models ............................................. 63 Table 2-6 Assembly locations: HP LaserJet M401dn and M401dw models ................................................ 64 Table 2-7 Assembly locations: optional paper feeder .............................................................................. 65 Table 2-8 Covers, panels, and doors (LCD control panel models) .............................................................. 67 Table 2-9 Covers, panels, and doors (touchscreen control panel models) ................................................... 69 Table 2-10 Internal components (1 of 5) ................................................................................................ 71 Table 2-11 Internal components (2 of 5) ................................................................................................ 73 Table 2-12 Internal components (3 of 5) ................................................................................................ 75 Table 2-13 Internal components (4 of 5) ................................................................................................ 77 Table 2-14 Internal components (5 of 5) ................................................................................................ 79 Table 2-15 PCA location ..................................................................................................................... 81 Table 2-16 Paper feeder covers ............................................................................................................ 83 Table 2-17 Paper feeder main body (1 of 2) .......................................................................................... 85 Table 2-18 Paper feeder main body (2 of 2) .......................................................................................... 87 Table 2-19 Alphabetical parts list ......................................................................................................... 88 Table 2-20 Numerical parts list ............................................................................................................. 93 ENWW ix x ENWW List of figures Figure 1-1 Phillips and Pozidriv screwdriver comparison ............................................................................ 3 Figure 1-2 Parts-removal order ................................................................................................................ 5 Figure 1-3 Remove the MP tray pickup roller ............................................................................................ 6 Figure 1-4 Remove the MP tray separation pad (1 of 5) ............................................................................. 7 Figure 1-5 Remove the MP tray separation pad (2 of 5) ............................................................................. 7 Figure 1-6 Remove the MP tray separation pad (3 of 5) ............................................................................. 8 Figure 1-7 Remove the MP tray separation pad (4 of 5) ............................................................................. 8 Figure 1-8 Remove the MP tray separation pad (5 of 5) ............................................................................. 8 Figure 1-9 Remove the Tray 2 or Tray 3 pickup roller (1 of 2) .................................................................... 9 Figure 1-10 Remove the Tray 2 or Tray 3 pickup roller (2 of 2) .................................................................. 9 Figure 1-11 Remove the Tray 2 or Tray 3 separation pad ........................................................................ 10 Figure 1-12 Remove the left cover ......................................................................................................... 11 Figure 1-13 Remove the right cover ....................................................................................................... 12 Figure 1-14 Remove the top-cover assembly and LCD control-panel module (1 of 3) .................................... 13 Figure 1-15 Remove the top-cover assembly and LCD control-panel module (2 of 3) .................................... 13 Figure 1-16 Remove the top-cover assembly and LCD control-panel module (3 of 3) .................................... 14 Figure 1-17 Remove the LCD control panel (1 of 2) ................................................................................. 15 Figure 1-18 Remove the LCD control panel (2 of 2) ................................................................................. 15 Figure 1-19 Remove the top-cover assembly (1 of 3) ............................................................................... 16 Figure 1-20 Remove the top-cover assembly (2 of 3) ............................................................................... 17 Figure 1-21 Remove the top-cover assembly (3 of 3) ............................................................................... 17 Figure 1-22 Remove the touchscreen control panel (1 of 3) ...................................................................... 18 Figure 1-23 Remove the touchscreen control panel (2 of 3) ...................................................................... 19 Figure 1-24 Remove the touchscreen control panel (3 of 3) ...................................................................... 19 Figure 1-25 Remove the rear cover, rear door, and feed assembly (1 of 3) ................................................ 20 Figure 1-26 Remove the rear cover, rear door, and feed assembly (2 of 3) ................................................ 21 Figure 1-27 Remove the rear cover, rear door, and feed assembly (3 of 3) ................................................ 22 Figure 1-28 Remove the cartridge door assembly and front cover (1 of 4) .................................................. 23 Figure 1-29 Remove the cartridge door assembly and front cover (2 of 4) .................................................. 24 Figure 1-30 Remove the cartridge door assembly and front cover (3 of 4) .................................................. 24 Figure 1-31 Remove the cartridge door assembly and front cover (4 of 4) .................................................. 25 Figure 1-32 Remove the laser scanner assembly (1 of 2) .......................................................................... 26 ENWW xi Figure 1-33 Remove the laser scanner assembly (2 of 2) .......................................................................... 27 Figure 1-34 Remove the registration assembly (1 of 3) ............................................................................ 28 Figure 1-35 Remove the registration assembly (2 of 3) ............................................................................ 28 Figure 1-36 Remove the registration assembly (3 of 3) ............................................................................ 29 Figure 1-37 Remove the fuser (1 of 5) ................................................................................................... 30 Figure 1-38 Remove the fuser (2 of 5) ................................................................................................... 30 Figure 1-39 Remove the fuser (3 of 5) ................................................................................................... 31 Figure 1-40 Remove the fuser (4 of 5) ................................................................................................... 31 Figure 1-41 Remove the fuser (5 of 5) ................................................................................................... 32 Figure 1-42 Remove the face-down-drive or duplex drive assembly (1 of 2) ................................................ 33 Figure 1-43 Remove the face-down-drive or duplexing-paper-feed assembly (2 of 2) ................................... 33 Figure 1-44 Remove the Tray 1 pickup solenoid (1 of 2) .......................................................................... 34 Figure 1-45 Remove the Tray 1 pickup solenoid (2 of 2) .......................................................................... 35 Figure 1-46 Remove the duplex solenoid ............................................................................................... 36 Figure 1-47 Remove the main motor (1 of 4) .......................................................................................... 37 Figure 1-48 Remove the main motor (2 of 4) .......................................................................................... 38 Figure 1-49 Remove the main motor (3 of 4) .......................................................................................... 38 Figure 1-50 Remove the main motor (4 of 4) .......................................................................................... 39 Figure 1-51 Remove the fan (1 of 2) ...................................................................................................... 40 Figure 1-52 Remove the fan (2 of 2) ...................................................................................................... 40 Figure 1-53 Allow the engine controller assembly to cool ......................................................................... 41 Figure 1-54 Remove the engine controller assembly (1 of 9) ..................................................................... 42 Figure 1-55 Remove the engine controller assembly (2 of 9) ..................................................................... 42 Figure 1-56 Remove the engine controller assembly (3 of 9) ..................................................................... 43 Figure 1-57 Remove the engine controller assembly (4 of 9) ..................................................................... 43 Figure 1-58 Remove the engine controller assembly (5 of 9) ..................................................................... 44 Figure 1-59 Remove the engine controller assembly (6 of 9) ..................................................................... 44 Figure 1-60 Remove the engine controller assembly (7 of 9) ..................................................................... 45 Figure 1-61 Remove the engine controller assembly (8 of 9) ..................................................................... 45 Figure 1-62 Remove the engine controller assembly (9 of 9) ..................................................................... 46 Figure 1-63 Remove the USB PCA (1 of 2) ............................................................................................. 47 Figure 1-64 Remove the USB PCA (2 of 2) ............................................................................................. 47 Figure 1-65 Remove the formatter ......................................................................................................... 48 Figure 1-66 Remove the wireless PCA ................................................................................................... 49 Figure 1-67 Remove the power-switch PCA (1 of 3) ................................................................................. 50 Figure 1-68 Remove the power-switch PCA (2 of 3) ................................................................................. 50 Figure 1-69 Remove the power-switch PCA (3 of 3) ................................................................................. 51 Figure 1-70 Remove the connecting PCA ............................................................................................... 51 Figure 1-71 Remove the transfer roller ................................................................................................... 52 Figure 1-72 Remove the paper-pickup-gear assembly .............................................................................. 53 Figure 1-73 Remove the optional paper feeder right cover ....................................................................... 54 xii ENWW Figure 1-74 Remove the optional paper feeder driver PCA (1 of 2) ........................................................... 54 Figure 1-75 Remove the optional paper feeder driver PCA (2 of 2) ........................................................... 55 Figure 1-76 Remove the optional paper feeder paper sensor PCA (1 of 4) ................................................. 55 Figure 1-77 Remove the optional paper feeder paper sensor PCA (2 of 4) ................................................. 56 Figure 1-78 Remove the optional paper feeder paper sensor PCA (3 of 4) ................................................. 56 Figure 1-79 Remove the optional paper feeder paper sensor PCA (4 of 4) ................................................. 57 Figure 2-1 Assembly locations: HP LaserJet M401a, M401n, M401d models ............................................ 63 Figure 2-2 Assembly locations: HP LaserJet M401dn and M401dw models ............................................... 64 Figure 2-3 Assembly locations: optional paper feeder ............................................................................. 65 Figure 2-4 Covers, panels, and doors (LCD control panel models) ............................................................. 66 Figure 2-5 Covers, panels, and doors (touchscreen control panel models) .................................................. 68 Figure 2-6 Internal components (1 of 5) ................................................................................................. 70 Figure 2-7 Internal components (2 of 5) ................................................................................................. 72 Figure 2-8 Internal components (3 of 5) ................................................................................................. 74 Figure 2-9 Internal components (4 of 5) ................................................................................................. 76 Figure 2-10 Internal components (5 of 5) ............................................................................................... 78 Figure 2-11 PCA location .................................................................................................................... 80 Figure 2-12 Paper feeder covers ........................................................................................................... 82 Figure 2-13 Paper feeder main body (1 of 2) ......................................................................................... 84 Figure 2-14 Paper feeder main body (2 of 2) ......................................................................................... 86 ENWW xiii xiv ENWW 1 ENWW Removal and replacement ● Removal and replacement strategy ● Service approach ● Removal and replacement procedures 1 Removal and replacement strategy WARNING! Turn the product off, wait 5 seconds, and then remove the power cord before attempting to service the product. If this warning is not followed, severe injury can result, in addition to damage to the product. The power must be on for certain functional checks during problem solving. However, the power supply should be disconnected during parts removal. Never operate or service the product with the protective cover removed from the laser scanner assembly. The reflected beam, although invisible, can damage your eyes. The sheet-metal parts can have sharp edges. Be careful when handling sheet-metal parts. CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do not straighten pre-folds in the FFCs. You must Make sure that all FFCs are fully seated in their connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA. NOTE: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, and then carefully turn it clockwise to tighten. Do not overtighten. If a self-tapping screw-hole becomes stripped, repair the screw-hole or replace the affected assembly. Electrostatic discharge CAUTION: Some parts are sensitive to electrostatic discharge (ESD). Look for the ESD reminder when removing product parts. Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part. Protect the ESD-sensitive parts by placing them in ESD pouches when they are out of the product. 2 Chapter 1 Removal and replacement ENWW Required tools ● #2 Phillips screwdriver with a magnetic tip and a 152 mm (6 in) shaft length ● Small flatblade screwdriver ● Needle-nose pliers ● ESD mat (if one is available) or ESD strap ● Penlight (optional) CAUTION: Always use a Phillips screwdriver (callout 1). Do not use a Pozidriv® screwdriver (callout 2) or any motorized screwdriver. These can damage screws or screw threads. Figure 1-1 Phillips and Pozidriv screwdriver comparison CAUTION: Avoid pulling directly on wires to disconnect wire-harness connectors. Pull on the plastic body of a connector to avoid damaging the connector wires. Types of screws WARNING! Make sure that components are replaced with the correct screw type. Using the incorrect screw (for example, substituting a long screw for the correct shorter screw) can cause damage to the product or interfere with product operation. Do not intermix screws that are removed from one component with the screws that are removed from another component. For a complete list of screw types and part numbers, see the Parts chapter. Service approach Before performing service ENWW ● Remove all paper from the product. ● Turn off the power using the power switch. ● Unplug the power cable and interface cable or cables. ● Place the product on an ESD workstation or mat, or use an ESD strap (if one is available). If an ESD workstation, mat, or strap is not available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part. Service approach 3 ● Remove the toner cartridge. ● Remove the Tray 2 cassette. After performing service ● Plug in the power cable. ● Reinstall the toner cartridge. ● Reinstall the Tray 2 cassette. ● Load paper in the product. Post-service test Perform the following test to verify that the repair or replacement was successful. Print-quality test 4 1. Verify that you have completed the necessary reassembly steps. 2. Make sure that the tray contains clean, unmarked paper. 3. Attach the power cord and interface cable or interface cables, and then turn on the product. 4. Verify that the expected startup sounds occur. 5. Print a configuration page, and then verify that the expected printing sounds occur. 6. Print a demo page, and then verify that the print quality is as expected. 7. Send a print job from the host computer, and then verify that the output meets expectations. 8. Clean the outside of the product with a damp cloth. Chapter 1 Removal and replacement ENWW ENWW Component Left cover Left cover Left cover Left cover Fan Engine controller unit (ECU) PCA Formatter PCA USB PCA (touchscreen CP model) Wireless PCA Service approach Optional paper feeder paper sensor PCA Tray 3 right cover Tray 3 right cover Left cover Main motor Optional paper feeder driver PCA Left cover Duplex solenoid Left cover Left cover Tray 2 solenoid Right cover Right cover Tray 1 solenoid Connecting PCA Left cover Face down drive or duplex drive assembly Power switch PCA Left cover Left cover Fuser assembly and paper feed guide Left cover Left cover Front-door and front-cover assembly Left cover Left cover Touchscreen control-panel Registration roller assembly Left cover LCD control-panel Laser scanner assembly Left cover Left cover Toner cartridge Transfer roller Top cover Tray 2/3 cassette Tray 2/3 separation roller Rear cover and feed assembly Left cover Tray 2/3 cassette Left cover Tray 2/3 pickup roller Tray 2 cassette Tray 1 separation pad Tray 1 pickup gear assembly Tray 2 cassette Right cover Remove Left cover Tray 1 pickup roller Tray 2 cassette Toner cartridge Right cover Wireless PCA (wireless models) Right cover Right cover Right cover Right cover Right cover Right cover Right cover Right cover Right cover Right cover Right cover Right cover Right cover Remove Front cover assembly Top cover Top cover Top cover Top cover Top cover Rear cover and feed assembly Top cover Top cover Top cover Top cover Remove Rear cover and feed assembly Rear cover and feed assembly Rear cover and feed assembly Rear cover and feed assembly Remove Fuser Remove ECU Remove Parts removal order Use the following diagram to determine which parts must be removed before removing other parts. Figure 1-2 Parts-removal order 5 Removal and replacement procedures Rollers Multipurpose (MP) tray pickup roller 1. Open the toner cartridge door, and then remove the toner cartridge. 2. Pull back and hold the pickup roller cover (callout 1), press the tabs (callout 2) on both ends of the pickup roller away from the roller — which should cause the roller to move up — and then remove the roller. Figure 1-3 Remove the MP tray pickup roller 1 2 Multipurpose (MP) tray separation pad To remove the separation pad, you must first remove the pickup roller assembly. 1. 2. 6 Remove the following components: ● Tray 2 cassette ● Left cover. See Left cover on page 10. Open the toner cartridge door, and then remove the toner cartridge. Chapter 1 Removal and replacement ENWW 3. On the left side of the product, release the innermost tab (callout 1) at the center of the gear, and then remove the gear (callout 2). NOTE: The gear is composed of two pieces. Releasing the outer tab does not remove the entire gear assembly and exposes an internal spring in the gear. Figure 1-4 Remove the MP tray separation pad (1 of 5) 1 3 2 Reinstallation tip Press and hold back the gear arm (callout 3) when reinstalling the pickup gear. 4. In the toner cartridge cavity, pull back the pickup roller cover, and then use a small flat-blade screwdriver to release the tab (callout 1) on the pickup roller shaft. Figure 1-5 Remove the MP tray separation pad (2 of 5) 1 ENWW Removal and replacement procedures 7 5. Move the pickup roller shaft to the left to free the right end of the shaft from the holder, and then remove the pickup roller shaft assembly to expose the separation pad. Figure 1-6 Remove the MP tray separation pad (3 of 5) Reinstallation tip The spring at the right end of the shaft is not captive and might fall off during this process. Make sure that the spring is positioned correctly when reinstalling, as shown in the following figure. Figure 1-7 Remove the MP tray separation pad (4 of 5) 6. Pull up on the top edge of the separation pad to release it from the product. Figure 1-8 Remove the MP tray separation pad (5 of 5) Reinstallation tip When reinstalling the pickup roller shaft assembly, make sure that the flat part of the pickup roller is directly over the separation pad. Tray 2 and optional Tray 3 pickup roller 1. 8 Remove the tray cassette from the product. Chapter 1 Removal and replacement ENWW 2. Locate the pickup roller at the top of the cassette cavity. On the left roller holder, release the tab (callout 1), and then turn the holder away from you. Figure 1-9 Remove the Tray 2 or Tray 3 pickup roller (1 of 2) 1 3. Push the pickup roller to the left to release the right side roller, and then pull the roller out of the product. Figure 1-10 Remove the Tray 2 or Tray 3 pickup roller (2 of 2) 4. Tray 2 and optional Tray 3 separation pad 1. ENWW Remove the tray cassette from the product. Removal and replacement procedures 9 2. Locate the separation pad at the front of the cassette. On the separation pad, remove two screws (callout 1), and then remove the pad from the tray cassette. Figure 1-11 Remove the Tray 2 or Tray 3 separation pad 1 3. Covers and control panel Left cover NOTE: No tools are necessary to remove this cover. However, a small flat-blade screwdriver might be helpful in releasing some of the tabs that hold the cover to the product chassis. 10 1. Remove the Tray 2 cassette. 2. Open the toner cartridge door and the rear jam access door. Chapter 1 Removal and replacement ENWW 3. Grasp the front edge of the cover, and then pull the cover toward the front to release the four tabs (callout 1). Figure 1-12 Remove the left cover 1 4. ENWW With the top and front edges loose, carefully slide the cover toward the back of the product, and then remove it. Removal and replacement procedures 11 Right cover NOTE: No tools are necessary to remove this cover. However, a small flat-blade screwdriver might be helpful in releasing some of the tabs that hold the cover to the product chassis. 1. Remove the Tray 2 cassette. 2. Open the toner cartridge door and the rear jam access door. 3. Grasp the rear edge of the cover, and then pull that edge toward the rear to release the four tabs (callout 1). Figure 1-13 Remove the right cover 1 4. 12 With the back and top edges loose, carefully slide the cover toward the front of the product, and then remove it. Chapter 1 Removal and replacement ENWW Top cover with LCD control-panel module 1. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. 2. Open the toner cartridge door and the rear jam access door. 3. On the left side of the product, disconnect one flat cable (callout 1) from the formatter. Figure 1-14 Remove the top-cover assembly and LCD control-panel module (1 of 3) 1 4. At the rear and on the right side of the product, remove three screws (callout 1). Figure 1-15 Remove the top-cover assembly and LCD control-panel module (2 of 3) 1 ENWW Removal and replacement procedures 13 5. On the top of the top-cover assembly, remove two screws (callout 1). Figure 1-16 Remove the top-cover assembly and LCD control-panel module (3 of 3) 1 6. Lift the top-cover assembly off of the product to remove it. NOTE: You do not need to remove the control panel from the top cover assembly, unless you are replacing the control panel. LCD control panel 1. 14 Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Top cover assembly. See Top cover with LCD control-panel module on page 13. Chapter 1 Removal and replacement ENWW 2. On the underside of the top cover assembly, disconnect the flat cable (callout 1), and then release the two tabs (callout 2) at the back of the control panel assembly. You might need to use a small, flatblade screwdriver to release the tabs. Figure 1-17 Remove the LCD control panel (1 of 2) 2 1 3. Pull the back of the control panel assembly away from the top cover assembly. Figure 1-18 Remove the LCD control panel (2 of 2) ENWW Removal and replacement procedures 15 Top cover with touchscreen control-panel module 1. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. 2. Open the toner cartridge door and the rear jam access door. 3. On the left side of the product, disconnect one flat cable (callout 1) from the formatter, and then remove two screws (callout 2). Figure 1-19 Remove the top-cover assembly (1 of 3) 2 1 16 Chapter 1 Removal and replacement ENWW 4. On the right side of the product, remove two screws (callout 1). Figure 1-20 Remove the top-cover assembly (2 of 3) 1 5. On the top-cover assembly, remove three screws (callout 1). NOTE: The screw behind the control panel has a protective cover over it. Remove the cover to remove the screw, but keep the cover in order to reinstall it after installing the control panel. Figure 1-21 Remove the top-cover assembly (3 of 3) 1 6. ENWW Lift the top-cover assembly off of the product to remove it. Removal and replacement procedures 17 Touchscreen control panel 1. 2. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16. On the underside of the top cover assembly, remove six screws (callout 1) and the protective plate (callout 2). Figure 1-22 Remove the touchscreen control panel (1 of 3) 1 2 1 1 3. 18 Disconnect the flat cable (callout 1), and then remove the following parts: ● Holder (callout 2) ● Pin (callout 3) Chapter 1 Removal and replacement ENWW ● Spring (callout 4) ● Sheet (callout 5) Figure 1-23 Remove the touchscreen control panel (2 of 3) 5 4 3 2 1 4. Pull the back of the control panel assembly away from the top cover assembly. Figure 1-24 Remove the touchscreen control panel (3 of 3) ENWW Removal and replacement procedures 19 Rear cover, rear door, and feed assembly CAUTION: The fuser can be hot while the product is in use. Wait for the fuser to cool before working in that area. 1. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. 2. Open the toner cartridge door and the rear jam access door. 3. Duplex models only: At the front of the product, in the Tray 2 cassette cavity, pull down on the green duplex-paper-feed-assembly release tab (callout 1), and then lower the assembly (callout 2). Figure 1-25 Remove the rear cover, rear door, and feed assembly (1 of 3) 2 20 Chapter 1 Removal and replacement 1 ENWW 4. At the rear of the product, remove five screws (callout 1), release one tab (callout 2) near the bottom corner, and release two tabs (callout 3) from under the top cover assembly. Figure 1-26 Remove the rear cover, rear door, and feed assembly (2 of 3) 3 1 1 2 5. Carefully separate the rear cover and rear door from the product, and then remove them. NOTE: For the duplex models, the duplex-paper-feed assembly is removed with the cover and door Reinstallation tip When you reinstall the rear cover assembly, open the rear door to make sure that the rear cover fits even against the product chassis before you install the mounting screws. ENWW Removal and replacement procedures 21 6. Duplex models only: There are two hinge pins (callout 1). Release the shorter left pin first, and then separate the rear cover and rear door assembly (callout 2) from the duplex-paper-feed assembly (callout 3). Figure 1-27 Remove the rear cover, rear door, and feed assembly (3 of 3) 2 3 1 22 Chapter 1 Removal and replacement ENWW Cartridge door and front cover assembly NOTE: The cartridge door assembly includes the cartridge door, Tray 1, and the front cover. 1. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. 2. Open the toner cartridge door and the rear jam access door. 3. Disconnect one connector (callout 1), and then release two tabs in the pivot joint (callout 2) to disengage the cartridge-door assembly link arm (callout 3). TIP: The link arm releases the fuser-pressure lever when the cartridge door is opened. Figure 1-28 Remove the cartridge door assembly and front cover (1 of 4) 2 3 ENWW 1 Removal and replacement procedures 23 4. Remove two screws (callout 1). Figure 1-29 Remove the cartridge door assembly and front cover (2 of 4) 1 5. Pull the bottom of the assembly up in order to release two hooked tabs (callout 1), and then pull the assembly away from the product. Figure 1-30 Remove the cartridge door assembly and front cover (3 of 4) 1 24 Chapter 1 Removal and replacement ENWW 6. Release two hinge pins (callout 1), and then separate the front cover (callout 2) from the cartridge door assembly (callout 3). Figure 1-31 Remove the cartridge door assembly and front cover (4 of 4) 1 3 2 ENWW Removal and replacement procedures 25 Main assemblies Laser scanner assembly WARNING! ESD sensitive component. CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do not straighten pre-folds in the FFCs. You must make sure that all FFCs are fully seated in their connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA. 1. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. 2. Open the toner cartridge door and the rear jam access door. 3. On the top of the product, remove the antistatic foam pad and disconnect one connector (callout 1), and then disconnect the flat cable (callout 2). Figure 1-32 Remove the laser scanner assembly (1 of 2) 2 1 26 Chapter 1 Removal and replacement ENWW 4. Remove four screws (callout 1), and then remove the laser scanner assembly. Figure 1-33 Remove the laser scanner assembly (2 of 2) 1 Registration roller assembly 1. 2. ENWW Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Rear cover, rear door, and feed assembly. See Rear cover, rear door, and feed assembly on page 20. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. Open the toner cartridge door and the rear jam access door. Removal and replacement procedures 27 3. On the left side of the product, release one tab (callout 1), and then remove the gear. Figure 1-34 Remove the registration assembly (1 of 3) 1 4. Inside the product chassis, on the formatter side, release two tabs (callout 1), and then lift up on the guide (callout 2) to release it and remove it from the product. Figure 1-35 Remove the registration assembly (2 of 3) 2 1 28 Chapter 1 Removal and replacement ENWW 5. Remove four screws (callout 1), and then remove the gear cover (callout 2). Figure 1-36 Remove the registration assembly (3 of 3) 1 3 6. 2 Slightly raise the right end of the assembly (callout 3), and then slide it to the right and lift it up to release it and remove it from the product. Reinstallation tip Insert the left end of the assembly first to reinstall the assembly. Fuser assembly and paper feed guide CAUTION: The fuser might be hot. Allow enough time for the fuser to cool after the product power is turned off. NOTE: The toner cartridge door assembly should be in the closed position when the fuser is removed to make sure that the fuser-drive gear is correctly aligned for reinstallation. 1. 2. ENWW Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Rear cover, rear door, and feed assembly. See Rear cover, rear door, and feed assembly on page 20. Open the rear jam access door Removal and replacement procedures 29 3. On the right side of the product, remove three gears (callout 1). Figure 1-37 Remove the fuser (1 of 5) 1 4. Remove two screws (callout 1). Figure 1-38 Remove the fuser (2 of 5) 1 30 Chapter 1 Removal and replacement ENWW 5. At the rear of the product, disconnect seven connectors (callout 1), and then pull the cable guide (callout 2) away from the product. Figure 1-39 Remove the fuser (3 of 5) 1 6. Remove one screw (callout 1), remove the paper feed guide (callout 2), and unroute the wire at the corner of the engine controller assembly (callout 3). Figure 1-40 Remove the fuser (4 of 5) 1 2 3 ENWW Removal and replacement procedures 31 7. Disconnect three connectors (callout 1), remove two screws (callout 2), and then remove the fuser (callout 3). Figure 1-41 Remove the fuser (5 of 5) 2 3 1 Face down drive or duplex drive assembly Simplex products have a face-down-drive assembly installed. Duplex products have a duplexing-paperfeed assembly installed. These components appear identical from the outside, but they have different internal gears and functions. The same procedure is used to remove either component. 1. 2. 32 Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. Open the toner cartridge door and the rear jam access door. Chapter 1 Removal and replacement ENWW 3. On the right side of the product, remove the grounding spring (callout 1), disconnect five connectors (callout 2), remove two screws (callout 3), and then remove the fan holder (callout 4) and the main fan (callout 5) together. Figure 1-42 Remove the face-down-drive or duplex drive assembly (1 of 2) 2 3 4 5 1 3 4. Remove three screws (callout 1), and then pull the assembly (callout 2) away from the product. Figure 1-43 Remove the face-down-drive or duplexing-paper-feed assembly (2 of 2) 1 2 CAUTION: Some of the gears and the solenoid arm are not captive. Do not lose the gears or the arm when you remove the assembly. ENWW Removal and replacement procedures 33 Solenoids Tray 1 solenoid 1. Remove the following components: ● Tray 2 cassette ● Left cover. See Left cover on page 10. 2. Open the toner cartridge door and the rear jam access door. 3. On the left side of the product, disconnect one connector (callout 1), and then release the wires from the wire harness (callout 2). Figure 1-44 Remove the Tray 1 pickup solenoid (1 of 2) 1 34 2 Chapter 1 Removal and replacement ENWW 4. Remove one screw (callout 1), and then remove the Tray 1 pickup solenoid. Figure 1-45 Remove the Tray 1 pickup solenoid (2 of 2) 1 Duplex solenoid NOTE: This section applies to duplex models only. 1. 2. ENWW Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Rear cover, rear door, and duplex-paper-feed assembly. See Rear cover, rear door, and feed assembly on page 20. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. ● Fan. See Fan on page 39. Open the toner cartridge door and the rear jam access door. Removal and replacement procedures 35 3. On the right side of the product, disconnect one connector (callout 1) from the connecting PCA, and then remove one screw (callout 2). Figure 1-46 Remove the duplex solenoid 1 2 36 Chapter 1 Removal and replacement ENWW Motors and fans Main motor 1. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. ● Rear cover, rear door, and duplex-paper-feed assembly. See Rear cover, rear door, and feed assembly on page 20. ● Fuser. See Fuser assembly and paper feed guide on page 29. ● Engine controller assembly (DC controller). See Engine controller assembly (DC controller) PCA on page 41. 2. Open the toner cartridge door and the rear jam access door. 3. At the rear of the product, release the cables (callout 1) from the cable guides (callout 2), and then pull out the paper feed assembly (callout 3). Figure 1-47 Remove the main motor (1 of 4) 3 ENWW 1 2 Removal and replacement procedures 37 4. Release the cables (callout 1) from the cable guides (callout 2), remove one screw (callout 3), and then remove the cable guide (callout 4). Figure 1-48 Remove the main motor (2 of 4) 2 3 5. 4 1 Remove one screw (callout 1), remove the duct (callout 2), and then disconnect one connector (callout 3). Figure 1-49 Remove the main motor (3 of 4) 2 3 1 38 Chapter 1 Removal and replacement ENWW 6. Remove three black-screws (callout 1) and one silver-screw (callout 2), release two tabs (callout 3), and then remove the main motor (callout 4) and the cable guide (callout 5) together. Figure 1-50 Remove the main motor (4 of 4) 2 3 4 5 1 Reinstallation tip Remember the location from where you removed the silver screw. The silver screw needs to be reinstalled in the same place. Fan 1. 2. ENWW Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. Open the toner cartridge door and the rear jam access door. Removal and replacement procedures 39 3. On the right side of the product, remove the grounding spring (callout 1), disconnect one connector (callout 2), release two tabs (callout 3), and then remove the main fan. Figure 1-51 Remove the fan (1 of 2) 2 1 3 Reinstallation tip When reassembling the main fan to the duct, make sure that the fan cable (callout 1) is positioned as shown in the figure below. Also, make sure that the label (callout 2) on the fan is facing inside. Figure 1-52 Remove the fan (2 of 2) 2 1 40 Chapter 1 Removal and replacement ENWW Printed circuit-board assemblies (PCAs) Engine controller assembly (DC controller) PCA WARNING! ESD sensitive component. CAUTION: When removing the engine controller assembly (callout 1) from the rear of the product, the portion (callout 2) on the left side of the assembly might be hot. Allow enough time for the engine controller assembly to cool after the product power is turned off. Figure 1-53 Allow the engine controller assembly to cool 1 2 1. ENWW Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Rear cover, rear door, and feed assembly. See Rear cover, rear door, and feed assembly on page 20. ● Top cover assembly. See Top cover with touchscreen control-panel module on page 16 or Top cover with LCD control-panel module on page 13. Removal and replacement procedures 41 2. At the rear of the product, disconnect seven connectors (callout 1). Figure 1-54 Remove the engine controller assembly (1 of 9) 1 3. Remove one screw (callout 1), and then remove the paper feed guide (callout 2). Figure 1-55 Remove the engine controller assembly (2 of 9) 1 42 Chapter 1 Removal and replacement 2 1 ENWW 4. Disconnect seven connectors (callout 1). Figure 1-56 Remove the engine controller assembly (3 of 9) 1 5. Release the cables (callout 1) from the cable guide (callout 2). Figure 1-57 Remove the engine controller assembly (4 of 9) 1 ENWW 2 1 Removal and replacement procedures 43 6. On the right side of the product, remove one screw (callout 1). Figure 1-58 Remove the engine controller assembly (5 of 9) 1 7. On the left side of the product, disconnect the two cartridge-door interlock switch connectors (callout 1), release the cables (callout 2) from the cable guides (callout 3), and then disconnect one connector (callout 4) and one flat cable (callout 5) on the formatter PCA. NOTE: Place a mark on one of the cartridge-door interlock switch wires before you disconnect them, so that you can reconnect the connectors to the same switch lugs. Figure 1-59 Remove the engine controller assembly (6 of 9) 1 2 3 5 44 4 Chapter 1 Removal and replacement ENWW 8. Remove three screws (callout 1). Figure 1-60 Remove the engine controller assembly (7 of 9) 1 9. On both sides of the product, use a small flat blade screwdriver to release the sheet-metal tabs (callout 1) in the product chassis to lower the engine controller assembly (DC controller) PCA (callout 2). NOTE: It might be easier to release the right side tab from inside the chassis. CAUTION: Carefully push the tab toward the outside of the product to release it. Do not bend the tab so much that it will not engage the mounting bracket when the engine controller assembly is reinstalled. Figure 1-61 Remove the engine controller assembly (8 of 9) 2 ENWW 1 Removal and replacement procedures 45 10. Pull the cable (callout 1) and the flat cable (callout 2) into the product chassis, and then carefully slide the engine controller assembly (callout 3) out of the product. Figure 1-62 Remove the engine controller assembly (9 of 9) 1 2 3 Universal serial bus (USB) PCA NOTE: This section applies to walkup USB-equipped models only. 1. 46 Remove the following components: ● Tray 2 cassette ● Left cover. See Left cover on page 10. Chapter 1 Removal and replacement ENWW 2. On the left side of the product, remove two screws (callout 1) on the USB PCA, and then pull the PCA away from the product. Figure 1-63 Remove the USB PCA (1 of 2) 1 3. Disconnect the connector (callout 1) on the back of the PCA. Figure 1-64 Remove the USB PCA (2 of 2) 1 ENWW Removal and replacement procedures 47 Formatter PCA WARNING! 1. 2. ESD sensitive component. Remove the following components: ● Tray 2 cassette ● Left cover. See Left cover on page 10. ● Wireless PCA (wireless models only). See Wireless PCA on page 48. On the left side of the product, disconnect any connectors and flat cables (callout 1) on the formatter, and then remove four screws (callout 2). Figure 1-65 Remove the formatter 2 1 NOTE: Wireless models only: The screw in the upper-right corner also fastens the wireless PCA holder to the formatter PCA. Keep this screw, which is longer, with the holder for reinstallation. Wireless PCA NOTE: This section applies to wireless models only. The wireless PCA is located at the top of the formatter PCA. 1. 48 Remove the following components: ● Tray 2 cassette ● Left cover. See Left cover on page 10. Chapter 1 Removal and replacement ENWW 2. On the left side of the product, release two tabs (callout 1), pull the lower left-hand corner of the PCA to disconnect the connector on the back of the PCA, and then pull the PCA away from the product. Figure 1-66 Remove the wireless PCA 1 Power switch PCA The power switch PCA is located in the product front cover. 1. ENWW Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. ● Left cover. See Left cover on page 10. ● Cartridge door and front cover assembly. See Cartridge door and front cover assembly on page 23. Removal and replacement procedures 49 2. On the back of the front cover, use a small flat-blade screwdriver to release two tabs (callout 1) to separate the two pieces of the cover. Figure 1-67 Remove the power-switch PCA (1 of 3) 1 3. Release two tabs (callout 1) to remove the PCA shield. Figure 1-68 Remove the power-switch PCA (2 of 3) 1 50 Chapter 1 Removal and replacement ENWW 4. Release one tab (callout 1), and then pull the PCA out of the front cover. Figure 1-69 Remove the power-switch PCA (3 of 3) 1 Connecting PCA The connecting PCA is located on the product right side, below the control panel. 1. 2. Remove the following components: ● Tray 2 cassette ● Right cover. See Right cover on page 12. On the right side of the product, disconnect any connectors (callout 1) on the PCA, remove one screw (callout 2), and then remove the connecting PCA. Figure 1-70 Remove the connecting PCA 1 2 ENWW Removal and replacement procedures 51 Miscellaneous parts Transfer roller CAUTION: Do not touch the sponge surface of the roller unless you are replacing the roller. Skin oils on the roller can cause print-quality problems. Always wear latex gloves when handling a transfer roller for reinstallation or replacement. 1. Open the toner cartridge door, and then remove the toner cartridge. 2. In the toner cartridge cavity, pull the sheet-metal jam plate toward the Tray 1 pickup roller cover (callout 1) and hold it, release the two tabs of the black locking clip on the right-side bushing (callout 2), pull the bushing up, and then slide the transfer roller (callout 3) to the right and remove it. Figure 1-71 Remove the transfer roller 3 2 1 CAUTION: The black locking clip on the right side of the transfer-roller shaft is not captive. Do not lose the locking clip when you remove the transfer roller. Multipurpose (MP) tray pickup gear assembly NOTE: The multipurpose tray is referred to as Tray 1 in user documentation. 1. 52 Remove the following components. ● Tray 2 cassette ● Left cover. See Left cover on page 10. Chapter 1 Removal and replacement ENWW 2. On the left side of the product, release the tab (callout 1) at the center of the gear, and then remove the gear (callout 2). Figure 1-72 Remove the paper-pickup-gear assembly 1 3 2 Reinstallation tip Press and hold back the gear arm (callout 3) when reinstalling the pickup gear. Optional paper feeder (Tray 3) When replacing any parts on the optional paper feeder (Tray 3), remove the tray cassette before removing any other parts. NOTE: To view the procedures for removing the optional paper feeder pickup roller or separation pad, see Rollers on page 6. ENWW Removal and replacement procedures 53 Optional paper feeder right cover ▲ Starting at the back of the unit, release six tabs (callout 1), and then slide the right cover toward the front of the unit to remove it. Figure 1-73 Remove the optional paper feeder right cover 1 Optional paper feeder driver PCA 1. Remove the right cover. 2. On the right side of the unit, remove one screw (callout 1), release one tab (callout 2) from the driver PCA cover (callout 3), and then slide the PCA cover to the right to remove it. Figure 1-74 Remove the optional paper feeder driver PCA (1 of 2) 3 2 1 54 Chapter 1 Removal and replacement ENWW 3. Disconnect three connectors (callout 1), and then remove one screw (callout 2) to remove the driver PCA. Figure 1-75 Remove the optional paper feeder driver PCA (2 of 2) 2 1 Optional paper feeder paper sensor PCA 1. Remove the right cover. 2. On the right side of the unit, remove one screw (callout 1), release one tab (callout 2) from the driver PCA cover (callout 3), and then slide the PCA cover to the right to remove it. Figure 1-76 Remove the optional paper feeder paper sensor PCA (1 of 4) 3 2 1 ENWW Removal and replacement procedures 55 3. On the driver PCA, disconnect one connector (callout 1). Figure 1-77 Remove the optional paper feeder paper sensor PCA (2 of 4) 1 4. At the front of the paper feeder, remove two screws (callout 1), remove the two plastic positioning pins (callout 2), and then lift the metal cover (callout 3) off the paper feeder. Figure 1-78 Remove the optional paper feeder paper sensor PCA (3 of 4) 1 2 56 Chapter 1 Removal and replacement 3 ENWW 5. Remove one screw (callout 1), and then release the PCA cable from the cable guides to remove the sensor PCA. Figure 1-79 Remove the optional paper feeder paper sensor PCA (4 of 4) 1 2 ENWW Removal and replacement procedures 57 58 Chapter 1 Removal and replacement ENWW 2 Parts and diagrams NOTE: In this chapter, part numbers are listed only for available replaceable parts. ENWW ● Order parts by authorized service providers ● How to use the parts lists and diagrams ● Assembly locations ● Covers, panels, and doors ● Internal assemblies ● Input devices ● Alphabetical parts list ● Numerical parts list 59 Order parts by authorized service providers Order replacement parts Table 2-1 Order parts, accessories, and supplies Order supplies and paper www.hp.com/go/suresupply Order genuine HP parts or accessories www.hp.com/buy/parts Order through service or support providers Contact an HP-authorized service or support provider. Related documentation and software Table 2-2 Related documentation and software Item Description Part number HP LaserJet Pro 400 M401 Printer Series User Guide Product user guide CF270-90908 (English) HP LaserJet Pro 400 M401 Printer Series Repair Manual English repair manual (this manual) CF270-90977 HP LaserJet Pro 400 M401 Printer Series Troubleshooting Manual English troubleshooting manual CF270-91001 Supplies part numbers Table 2-3 Supplies part numbers Part Part number Type/size Toner cartridge CF280-67901 (standard) Black toner cartridge CF280-67902 (extended) Paper feeder CF284A 500-sheet Tray 3 USB 2.0 cable C6518A (2-meter standard) A-to-B cable Whole-unit replacement part numbers NOTE: Whole-unit replacement products include the formatter PCA. Table 2-4 Whole-unit replacement part numbers 60 Item Description Part number HP LaserJet Pro 400 M401a Printer 220v WUR EMEA CF270-69001 (exchange) Chapter 2 Parts and diagrams ENWW Table 2-4 Whole-unit replacement part numbers (continued) Item Description Part number HP LaserJet Pro 400 M401d Printer 220v WUR EMEA CF274-69001 (exchange) 220v WUR CN/MY CF274-67058 (replace) 220v WUR AP CF274-69002 (exchange) 110v WUR NAR/TW CZ195-69001 (exchange) 220v WUR CN/MY CZ195-67058 (replace) 220v WUR AP/LAR CZ195-69002 (exchange) 220v WUR CL/AR CZ195-69003 (exchange) 110v WUR BR CZ195-69004 (exchange) 110v WUR NAR/TW CF278-69001 (exchange) 220v WUR EMEA CF278-69002 (exchange) 220v WUR CN/MY CF278-67059 (replace) 220v WUR AP/LAR CF278-69003 (exchange) 220v WUR CL/AR CF278-69004 (exchange) 110v WUR BR CF278-69005 (exchange) 110v WUR NAR/TW CF285-69001 (exchange) 220v WUR EMEA CF285-69002 (exchange) 220v WUR CN/MY CF285-67059 (replace) 220v WUR AP/LAR CF285-69003 (exchange) 110v WUR BR CF285-69004 (exchange) HP LaserJet Pro 400 M401n Printer HP LaserJet Pro 400 M401dn Printer HP LaserJet Pro 400 M401dw Printer ENWW Order parts by authorized service providers 61 How to use the parts lists and diagrams The figures in this chapter show the major subassemblies in the product and their component parts. A parts list table follows each exploded view assembly diagram. Each table lists the item number, the associated part number, and the description of each part. If a part is not listed in the table, then it is not a field replacement unit (FRU). CAUTION: Be sure to order the correct part. When looking for part numbers for electrical components, pay careful attention to the voltage that is listed in the description column. Doing so will ensure that the part number selected is for the correct all-in-one model. NOTE: In this manual, the abbreviation “PCA” stands for “printed circuit-board assembly.” Components described as a PCA might consist of a single circuit board or a circuit board plus other parts, such as cables and sensors. 62 Chapter 2 Parts and diagrams ENWW Assembly locations HP LaserJet M401a, M401n, M401d models Figure 2-1 Assembly locations: HP LaserJet M401a, M401n, M401d models 1 11 10 2 3 9 8 4 5 7 6 Table 2-5 Assembly locations: HP LaserJet M401a, M401n, M401d models ENWW Item Description Item Description 1 Cartridge door 7 Rear cover (HP LaserJet M401a and M401n models) or duplex cover (HP LaserJet M401d model) 2 LCD control panel 8 Power receptacle 3 Jam removal door 9 Power switch 4 Rear output door 10 Tray 2 cassette 5 Output bin 11 Multipurpose tray (Tray 1) 6 DIMM door Assembly locations 63 HP LaserJet M401dn and M401dw models Figure 2-2 Assembly locations: HP LaserJet M401dn and M401dw models 1 11 10 2 3 9 8 4 7 5 6 Table 2-6 Assembly locations: HP LaserJet M401dn and M401dw models 64 Item Description Item Description 1 Toner cartridge door 7 Duplex cover 2 Touchscreen control panel 8 Power receptacle 3 Jam removal door 9 Power button 4 Rear output door 10 Tray 2 cassette 5 Output bin 11 Multipurpose tray (Tray 1) 6 DIMM cover Chapter 2 Parts and diagrams ENWW Optional paper feeder Figure 2-3 Assembly locations: optional paper feeder 1 3 2 Table 2-7 Assembly locations: optional paper feeder ENWW Item Description Item Description 1 Positioning pins 3 Tray 3 cassette 2 Option interface connector Assembly locations 65 Covers, panels, and doors Figure 2-4 Covers, panels, and doors (LCD control panel models) 11 2 SIMPLEX MODEL 3 4 A02 3 1 DUPLEX MODEL A01 (J215) 10 (J1001) 9 7 8 5 A02 66 Chapter 2 Parts and diagrams 6 ENWW Table 2-8 Covers, panels, and doors (LCD control panel models) ENWW Ref Description Part number Qty 1 Cartridge door assembly RM1-9145-000CN 1 2 Cover, top RM1-9180-000CN 1 3 Cover, rear (duplex model) RM1-9161-000CN 1 3 Cover, rear (simplex model) RM1-9163-000CN 1 4 Cover, right RM1-9171-000CN 1 5 Cover, left RM1-9174-000CN 1 6 Cover, outer, front RC3-2533-000CN 1 7 Switch, power button assembly RM1-9125-000CN 1 8 Cover, inner, front RC3-2532-000CN 1 9 Lever, power supply button RC3-2545-000CN 1 10 Power button PCA RM1-9039-000CN 1 11 Control-panel assembly RM1-9149-000CN 1 Covers, panels, and doors 67 Figure 2-5 Covers, panels, and doors (touchscreen control panel models) 14 11 12 A10 A03 2 13 A02 A04 A05 A06 A11 3 A07 (J2) 4 A09 A08 A08 A02 1 A01 (J215) 10 (J1001) 9 7 8 5 A02 68 Chapter 2 Parts and diagrams 6 ENWW Table 2-9 Covers, panels, and doors (touchscreen control panel models) ENWW Ref Description Part number Qty 1 Cartridge door assembly RM1-9145-000CN 1 2 Cover, top RM1-9179-000CN 1 3 Cover, rear RM1-9161-000CN 1 4 Cover, right RM1-9171-000CN 1 5 Cover, left RM1-9123-000CN 1 6 Cover, outer, front RC3-2533-000CN 1 7 Switch, power button assembly RM1-9125-000CN 1 8 Cover, inner, front RC3-2532-000CN 1 9 Lever, power supply button RC3-2545-000CN 1 10 Power button PCA RM1-9039-000CN 1 11 Arm, control panel RC3-2584-000CN 1 12 Cover, cable RC3-2585-000CN 1 13 Plate, base RC3-2586-000CN 1 14 Control-panel assembly CF285-60101 1 Covers, panels, and doors 69 Internal assemblies Figure 2-6 Internal components (1 of 5) A06 A05 A02 A04 A07 1 A03 A A12 A13 A14 A15 A03 A03 A11 A08 A10 A01 A14 A16 A17 A A09 A18 70 Chapter 2 Parts and diagrams ENWW Table 2-10 Internal components (1 of 5) ENWW Ref Description Part number Qty 1 Fuser (110V) RM1-8808-000CN 1 1 Fuser (220V) RM1-8809-000CN 1 Internal assemblies 71 Figure 2-7 Internal components (2 of 5) A21 A12 (J101) 3 A07 A02 A01 (J202) A04 A03 A05 1 A08 (M1) (J1202) A06 A09 (J1202) 5 A11 A13 A15 A31 A10 TOUCHSCREEN MODEL A15 A38 A14 A15 A39 A16 A37 A15 A17 A29 A31 A36 A15 A34 A28 A27 A15 A33 A19 A23 A24 A35 A15 A26 A18 A15 A22 A20 A25 A15 4 A15 A15 A30 6 A31 A32 2 A31 72 Chapter 2 Parts and diagrams ENWW Table 2-11 Internal components (2 of 5) ENWW Ref Description Part number Qty 1 Main motor assembly RM1-9042-000CN 1 2 Bushing RC2-8263-000CN 1 3 Separation pad, multipurpose tray RL1-2115-000CN 1 4 Bushing RC2-6131-000CN 1 5 Paper pickup gear assembly RM1-7360-000CN 1 6 Paper pickup roller assembly RM1-9168-000CN 1 Internal assemblies 73 Figure 2-8 Internal components (3 of 5) A13 A03 (J1103) A13 (J802) A04 4 A02 A01 A12 1 3 (J801) (J5) A05 A07 A24 A22 A06 A08 A09 A23 (J581) A10 2 A26 A17 A12 A14 A19 A21 5 A16 A18 A15 A20 A25 A11 (J203) A12 6 A13 74 Chapter 2 Parts and diagrams ENWW Table 2-12 Internal components (3 of 5) ENWW Ref Description Part number Qty 1 Cable, flexible, flat RK2-4452-000CN 1 2 Paper feed guide assembly RM1-9122-000CN 1 3 Laser scanner assembly RM1-9135-000CN 1 4 Registration roller assembly RM1-8806-000CN 1 5 Transfer roller assembly RM1-9175-000CN 1 6 Sensor assembly RM1-8807-000CN 1 Internal assemblies 75 Figure 2-9 Internal components (4 of 5) A03 1 A02 A24 (FM1) (J1105) (J211) A04 (J1205D) A11 A24 2 (J1205F) A01 A05 A01 (J207) (J207) A12 A06 A01 (J1102) (SL2) (J1104) A01 A10 A07 (SW301) A24 A08 A22 A13 A14 A21 A09 3 A23 A01 4 A19 (SL1) (J6) 8 A15 5 7 A16 A17 A18 76 A16 Chapter 2 Parts and diagrams 6 ENWW Table 2-13 Internal components (4 of 5) ENWW Ref Description Part number Qty 1 Fan RK2-4418-000CN 1 2 Connecting PCA RM1-9047-000CN 1 4 Solenoid RK2-2731-000CN 1 5 Separation pad holder assembly RM1-7365-000CN 1 6 Cassette assembly (Tray 2) RM1-9137-000CN 1 7 Pickup roller, multipurpose tray (Tray 1) RL1-3307-000CN 1 8 Multipurpose tray pickup gear assembly RM1-9127-000CN 1 Internal assemblies 77 Figure 2-10 Internal components (5 of 5) (FT3) DUPLEX MODEL A 1 (J7) (FT2) SIMPLEX MODEL (FT1) 3 A03 A01 A04 DUPLEX MODEL (SL3) (J1101) A01 4 DUPLEX MODEL 3 A01 A02 2 A A01 USB MODEL A08 A03 78 Chapter 2 Parts and diagrams ENWW Table 2-14 Internal components (5 of 5) ENWW Ref Description Part number Qty 1 Engine controller assembly (DC controller) — 110V RM1-9164-000CN 1 1 Engine controller assembly (DC controller) — 220V RM1-9165-000 1 2 Duplexing paper feed assembly (duplex models only) RM1-9153-000CN 1 3 Reverse drive assembly (duplex models only) RM1-9157-000CN 1 3 Face-down drive assembly (simplex models only) RM1-9160-000CN 1 4 Solenoid, duplex RK2-2733-000CN 1 Internal assemblies 79 Figure 2-11 PCA location 4 3 2 1 5 6 80 Chapter 2 Parts and diagrams ENWW Table 2-15 PCA location ENWW Ref Description Part number Qty 1 Formatter PCA (HP LaserJet M401a, M401d models) CF148-60001 1 1 Formatter PCA (HP LaserJet M401n model) CF149-60001 1 1 Formatter PCA (HP LaserJet M401dn, M401dw models) CF150-60001 1 1 Formatter PCA (China, HP LaserJet M401a, M401d models) CF148-69001 1 1 Formatter PCA (China, HP LaserJet M401n model) CF149-69001 1 1 Formatter PCA (China, HP LaserJet M401dn, M401dw models) CF150-69001 1 1 Formatter PCA (HP LaserJet M401dne model with LCD) CF399-60001 1 2 Wireless PCA (HP LaserJet M401dw model only) 1150-7940 1 2 Wireless PCA holder (not pictured — HP LaserJet M401dw model only) CF286-40014 1 3 Engine controller assembly (DC controller) PCA — 110V RM1-9164-000CN 1 3 Engine controller assembly (DC controller) PCA — 220V RM1-9165-000CN 1 4 Connecting PCA RM1-9047-000CN 1 5 Power switch PCA RM1-9039-000CN 1 6 Universal serial bus (USB) PCA (HP LaserJet M401dn and M401dw models only) CF368-60001 1 Internal assemblies 81 Input devices 500-sheet paper feeder Paper feeder covers Figure 2-12 Paper feeder covers 3 2 1 82 Chapter 2 Parts and diagrams ENWW Table 2-16 Paper feeder covers ENWW Ref Description Part number Qty 1 Cover, left RC3-2618-000CN 1 2 Cover, right RM1-9316-000CN 1 3 Cover, rear RC3-2621-000CN 1 Input devices 83 Paper feeder main body (1 of 2) Figure 2-13 Paper feeder main body (1 of 2) A07 A07 A04 A05 A18 A06 A02 1 A01 A07 A03 A13 A04 A09 (SL4) (J1202) A08 A07 2 A07 A16 A07 A14 A07 A07 A10 A17 A07 A15 A07 A07 A12 A11 A12 84 Chapter 2 Parts and diagrams ENWW Table 2-17 Paper feeder main body (1 of 2) ENWW Ref Description Part number Qty 1 Paper pickup gear assembly RM1-7360-000CN 1 2 Solenoid RK2-0426-000CN 1 Input devices 85 Paper feeder main body (2 of 2) Figure 2-14 Paper feeder main body (2 of 2) A04 A03 A01 A04 A02 1 A09 (J1205) A04 A10 A07 A07 2 A04 A13 (PS1201) (J1203) A04 5 A11 (J1205) A04 A12 A06 A08 A05 A06 4 3 86 Chapter 2 Parts and diagrams ENWW Table 2-18 Paper feeder main body (2 of 2) ENWW Ref Description Part number Qty 1 Paper feeder pickup roller assembly RM1-9168-000CN 1 2 Paper feeder driver PCA RM1-9297-000CN 1 3 Paper feeder cassette (Tray 3) RM1-9313-000CN 1 4 Paper feeder separation pad holder assembly RM1-6303-000CN 1 5 Paper feeder paper sensor PCA RM1-1267-000CN 1 Input devices 87 Alphabetical parts list Table 2-19 Alphabetical parts list 88 Description Part number Table and page Arm, control panel RC3-2584-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Bushing RC2-8263-000CN Internal components (2 of 5) on page 73 Bushing RC2-6131-000CN Internal components (2 of 5) on page 73 Cable, flexible, flat RK2-4452-000CN Internal components (3 of 5) on page 75 Cartridge door assembly RM1-9145-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cartridge door assembly RM1-9145-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Cassette assembly (Tray 2) RM1-9137-000CN Internal components (4 of 5) on page 77 Connecting PCA RM1-9047-000CN Internal components (4 of 5) on page 77 Connecting PCA RM1-9047-000CN PCA location on page 81 Control-panel assembly RM1-9149-000CN Covers, panels, and doors (LCD control panel models) on page 67 Control-panel assembly CF285-60101 Covers, panels, and doors (touchscreen control panel models) on page 69 Cover, cable RC3-2585-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Cover, inner, front RC3-2532-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, inner, front RC3-2532-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Cover, left RM1-9174-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, left RM1-9123-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Chapter 2 Parts and diagrams ENWW Table 2-19 Alphabetical parts list (continued) ENWW Description Part number Table and page Cover, left RC3-2618-000CN Paper feeder covers on page 83 Cover, outer, front RC3-2533-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, outer, front RC3-2533-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Cover, rear RM1-9161-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Cover, rear RC3-2621-000CN Paper feeder covers on page 83 Cover, rear (duplex model) RM1-9161-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, rear (simplex model) RM1-9163-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, right RM1-9171-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, right RM1-9171-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Cover, right RM1-9316-000CN Paper feeder covers on page 83 Cover, top RM1-9180-000CN Covers, panels, and doors (LCD control panel models) on page 67 Cover, top RM1-9179-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Duplexing paper feed assembly (duplex models only) RM1-9153-000CN Internal components (5 of 5) on page 79 Engine controller assembly (DC controller) PCA — 110V RM1-9164-000CN PCA location on page 81 Engine controller assembly (DC controller) PCA — 220V RM1-9165-000CN PCA location on page 81 Engine controller assembly (DC controller) — 110V RM1-9164-000CN Internal components (5 of 5) on page 79 Engine controller assembly (DC controller) — 220V RM1-9165-000 Internal components (5 of 5) on page 79 Alphabetical parts list 89 Table 2-19 Alphabetical parts list (continued) 90 Description Part number Table and page Face-down drive assembly (simplex models only) RM1-9160-000CN Internal components (5 of 5) on page 79 Fan RK2-4418-000CN Internal components (4 of 5) on page 77 Formatter PCA (China, HP LaserJet M401a, M401d models) CF148-69001 PCA location on page 81 Formatter PCA (China, HP LaserJet M401dn, M401dw models) CF150-69001 PCA location on page 81 Formatter PCA (China, HP LaserJet M401n model) CF149-69001 PCA location on page 81 Formatter PCA (HP LaserJet M401a, M401d models) CF148-60001 PCA location on page 81 Formatter PCA (HP LaserJet M401dn, M401dw models) CF150-60001 PCA location on page 81 Formatter PCA (HP LaserJet M401dne model with LCD) CF399-60001 PCA location on page 81 Formatter PCA (HP LaserJet M401n model) CF149-60001 PCA location on page 81 Fuser (110V) RM1-8808-000CN Internal components (1 of 5) on page 71 Fuser (220V) RM1-8809-000CN Internal components (1 of 5) on page 71 Laser scanner assembly RM1-9135-000CN Internal components (3 of 5) on page 75 Lever, power supply button RC3-2545-000CN Covers, panels, and doors (LCD control panel models) on page 67 Lever, power supply button RC3-2545-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Main motor assembly RM1-9042-000CN Internal components (2 of 5) on page 73 Multipurpose tray pickup gear assembly RM1-9127-000CN Internal components (4 of 5) on page 77 Paper feed guide assembly RM1-9122-000CN Internal components (3 of 5) on page 75 Paper feeder cassette (Tray 3) RM1-9313-000CN Paper feeder main body (2 of 2) on page 87 Paper feeder driver PCA RM1-9297-000CN Paper feeder main body (2 of 2) on page 87 Paper feeder paper sensor PCA RM1-1267-000CN Paper feeder main body (2 of 2) on page 87 Paper feeder pickup roller assembly RM1-9168-000CN Paper feeder main body (2 of 2) on page 87 Paper feeder separation pad holder assembly RM1-6303-000CN Paper feeder main body (2 of 2) on page 87 Chapter 2 Parts and diagrams ENWW Table 2-19 Alphabetical parts list (continued) ENWW Description Part number Table and page Paper pickup gear assembly RM1-7360-000CN Internal components (2 of 5) on page 73 Paper pickup gear assembly RM1-7360-000CN Paper feeder main body (1 of 2) on page 85 Paper pickup roller assembly RM1-9168-000CN Internal components (2 of 5) on page 73 Pickup roller, multipurpose tray (Tray 1) RL1-3307-000CN Internal components (4 of 5) on page 77 Plate, base RC3-2586-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Power button PCA RM1-9039-000CN Covers, panels, and doors (LCD control panel models) on page 67 Power button PCA RM1-9039-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Power switch PCA RM1-9039-000CN PCA location on page 81 Registration roller assembly RM1-8806-000CN Internal components (3 of 5) on page 75 Reverse drive assembly (duplex models only) RM1-9157-000CN Internal components (5 of 5) on page 79 Sensor assembly RM1-8807-000CN Internal components (3 of 5) on page 75 Separation pad holder assembly RM1-7365-000CN Internal components (4 of 5) on page 77 Separation pad, multipurpose tray RL1-2115-000CN Internal components (2 of 5) on page 73 Solenoid RK2-2731-000CN Internal components (4 of 5) on page 77 Solenoid RK2-0426-000CN Paper feeder main body (1 of 2) on page 85 Solenoid, duplex RK2-2733-000CN Internal components (5 of 5) on page 79 Switch, power button assembly RM1-9125-000CN Covers, panels, and doors (LCD control panel models) on page 67 Switch, power button assembly RM1-9125-000CN Covers, panels, and doors (touchscreen control panel models) on page 69 Transfer roller assembly RM1-9175-000CN Internal components (3 of 5) on page 75 Alphabetical parts list 91 Table 2-19 Alphabetical parts list (continued) 92 Description Part number Table and page Universal serial bus (USB) PCA (HP LaserJet M401dn and M401dw models only) CF368-60001 PCA location on page 81 Wireless PCA (HP LaserJet M401dw model only) 1150-7940 PCA location on page 81 Wireless PCA holder (not pictured — HP LaserJet M401dw model only) CF286-40014 PCA location on page 81 Chapter 2 Parts and diagrams ENWW Numerical parts list Table 2-20 Numerical parts list ENWW Part number Description Table and page CF148-60001 Formatter PCA (HP LaserJet M401a, M401d models) PCA location on page 81 CF148-69001 Formatter PCA (China, HP LaserJet M401a, M401d models) PCA location on page 81 CF149-60001 Formatter PCA (HP LaserJet M401n model) PCA location on page 81 CF149-69001 Formatter PCA (China, HP LaserJet M401n model) PCA location on page 81 CF150-60001 Formatter PCA (HP LaserJet M401dn, M401dw models) PCA location on page 81 CF150-69001 Formatter PCA (China, HP LaserJet M401dn, M401dw models) PCA location on page 81 1150-7940 Wireless PCA (HP LaserJet M401dw model only) PCA location on page 81 CF285-60101 Control-panel assembly Covers, panels, and doors (touchscreen control panel models) on page 69 CF286-40014 Wireless PCA holder (not pictured — HP LaserJet M401dw model only) PCA location on page 81 CF368-60001 Universal serial bus (USB) PCA (HP LaserJet M401dn and M401dw models only) PCA location on page 81 CF399-60001 Formatter PCA (HP LaserJet M401dne model with LCD) PCA location on page 81 RC2-6131-000CN Bushing Internal components (2 of 5) on page 73 RC2-8263-000CN Bushing Internal components (2 of 5) on page 73 RC3-2532-000CN Cover, inner, front Covers, panels, and doors (LCD control panel models) on page 67 RC3-2532-000CN Cover, inner, front Covers, panels, and doors (touchscreen control panel models) on page 69 RC3-2533-000CN Cover, outer, front Covers, panels, and doors (LCD control panel models) on page 67 RC3-2533-000CN Cover, outer, front Covers, panels, and doors (touchscreen control panel models) on page 69 RC3-2545-000CN Lever, power supply button Covers, panels, and doors (LCD control panel models) on page 67 RC3-2545-000CN Lever, power supply button Covers, panels, and doors (touchscreen control panel models) on page 69 Numerical parts list 93 Table 2-20 Numerical parts list (continued) 94 Part number Description Table and page RC3-2584-000CN Arm, control panel Covers, panels, and doors (touchscreen control panel models) on page 69 RC3-2585-000CN Cover, cable Covers, panels, and doors (touchscreen control panel models) on page 69 RC3-2586-000CN Plate, base Covers, panels, and doors (touchscreen control panel models) on page 69 RC3-2618-000CN Cover, left Paper feeder covers on page 83 RC3-2621-000CN Cover, rear Paper feeder covers on page 83 RK2-0426-000CN Solenoid Paper feeder main body (1 of 2) on page 85 RK2-2731-000CN Solenoid Internal components (4 of 5) on page 77 RK2-2733-000CN Solenoid, duplex Internal components (5 of 5) on page 79 RK2-4418-000CN Fan Internal components (4 of 5) on page 77 RK2-4452-000CN Cable, flexible, flat Internal components (3 of 5) on page 75 RL1-2115-000CN Separation pad, multipurpose tray Internal components (2 of 5) on page 73 RL1-3307-000CN Pickup roller, multipurpose tray (Tray 1) Internal components (4 of 5) on page 77 RM1-1267-000CN Paper feeder paper sensor PCA Paper feeder main body (2 of 2) on page 87 RM1-6303-000CN Paper feeder separation pad holder assembly Paper feeder main body (2 of 2) on page 87 RM1-7360-000CN Paper pickup gear assembly Internal components (2 of 5) on page 73 RM1-7360-000CN Paper pickup gear assembly Paper feeder main body (1 of 2) on page 85 RM1-7365-000CN Separation pad holder assembly Internal components (4 of 5) on page 77 RM1-8806-000CN Registration roller assembly Internal components (3 of 5) on page 75 RM1-8807-000CN Sensor assembly Internal components (3 of 5) on page 75 Chapter 2 Parts and diagrams ENWW Table 2-20 Numerical parts list (continued) ENWW Part number Description Table and page RM1-8808-000CN Fuser (110V) Internal components (1 of 5) on page 71 RM1-8809-000CN Fuser (220V) Internal components (1 of 5) on page 71 RM1-9039-000CN Power button PCA Covers, panels, and doors (LCD control panel models) on page 67 RM1-9039-000CN Power button PCA Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9039-000CN Power switch PCA PCA location on page 81 RM1-9042-000CN Main motor assembly Internal components (2 of 5) on page 73 RM1-9047-000CN Connecting PCA Internal components (4 of 5) on page 77 RM1-9047-000CN Connecting PCA PCA location on page 81 RM1-9122-000CN Paper feed guide assembly Internal components (3 of 5) on page 75 RM1-9123-000CN Cover, left Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9125-000CN Switch, power button assembly Covers, panels, and doors (LCD control panel models) on page 67 RM1-9125-000CN Switch, power button assembly Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9127-000CN Multipurpose tray pickup gear assembly Internal components (4 of 5) on page 77 RM1-9135-000CN Laser scanner assembly Internal components (3 of 5) on page 75 RM1-9137-000CN Cassette assembly (Tray 2) Internal components (4 of 5) on page 77 RM1-9145-000CN Cartridge door assembly Covers, panels, and doors (LCD control panel models) on page 67 RM1-9145-000CN Cartridge door assembly Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9149-000CN Control-panel assembly Covers, panels, and doors (LCD control panel models) on page 67 Numerical parts list 95 Table 2-20 Numerical parts list (continued) 96 Part number Description Table and page RM1-9153-000CN Duplexing paper feed assembly (duplex models only) Internal components (5 of 5) on page 79 RM1-9157-000CN Reverse drive assembly (duplex models only) Internal components (5 of 5) on page 79 RM1-9160-000CN Face-down drive assembly (simplex models only) Internal components (5 of 5) on page 79 RM1-9161-000CN Cover, rear (duplex model) Covers, panels, and doors (LCD control panel models) on page 67 RM1-9161-000CN Cover, rear Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9163-000CN Cover, rear (simplex model) Covers, panels, and doors (LCD control panel models) on page 67 RM1-9164-000CN Engine controller assembly (DC controller) — 110V Internal components (5 of 5) on page 79 RM1-9164-000CN Engine controller assembly (DC controller) PCA — 110V PCA location on page 81 RM1-9165-000 Engine controller assembly (DC controller) — 220V Internal components (5 of 5) on page 79 RM1-9165-000CN Engine controller assembly (DC controller) PCA — 220V PCA location on page 81 RM1-9168-000CN Paper pickup roller assembly Internal components (2 of 5) on page 73 RM1-9168-000CN Paper feeder pickup roller assembly Paper feeder main body (2 of 2) on page 87 RM1-9171-000CN Cover, right Covers, panels, and doors (LCD control panel models) on page 67 RM1-9171-000CN Cover, right Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9174-000CN Cover, left Covers, panels, and doors (LCD control panel models) on page 67 RM1-9175-000CN Transfer roller assembly Internal components (3 of 5) on page 75 RM1-9179-000CN Cover, top Covers, panels, and doors (touchscreen control panel models) on page 69 RM1-9180-000CN Cover, top Covers, panels, and doors (LCD control panel models) on page 67 Chapter 2 Parts and diagrams ENWW Table 2-20 Numerical parts list (continued) ENWW Part number Description Table and page RM1-9297-000CN Paper feeder driver PCA Paper feeder main body (2 of 2) on page 87 RM1-9313-000CN Paper feeder cassette (Tray 3) Paper feeder main body (2 of 2) on page 87 RM1-9316-000CN Cover, right Paper feeder covers on page 83 Numerical parts list 97 98 Chapter 2 Parts and diagrams ENWW Index A accessories ordering 60 after-service checklist 4 C cartridge ordering 60 part number 60 cautions iii checklists after-service 4 preservice 3 conventions, document iii covers left, removing 10 locations 66 parts list 66 right, removing 12 top, removing 13, 16 covers, removing rear 20 D diagrams 59 covers. panels, and doors 66 internal assemblies 70 document conventions iii doors front, removing 23 parts list 66 Tray 1, removing 23 doors, removing rear 20 duplex paper-feed assembly (duplex model) replacing 32 paper-feed assembly, removing 20 ENWW E electrostatic discharge (ESD) 2 engine controller assembly, removing 41 ESD (electrostatic discharge) precaution during parts removal 2 F face-down-drive assembly (base model) replacing 32 formatter PCA, removing 48 front door, removing 23 fuser, removing 29 I internal assembly locations 70 parts list 70 L left cover, removing 10 location assemblies 0 M main motor replacing N notes 37 iii O ordering product documents 60 supplies and accessories 60 toner cartridge 60 whole-unit replacement 60 P panels parts list 66 paper-pickup-gear assembly replacing 52 part number toner cartridge 60 whole-unit replacement 60 parts 59 assemblies 0 cover locations 66 door locations 66 internal assembly locations 70 panel locations 66 screws 3 pliers, required 3 post-service tests 4 preservice checklist 3 print quality test 4 R rear cover, removing 20 rear door, removing 20 removing parts cautions for 2 checklists 3 duplex-paper-feed assembly 20 engine controller assembly 41 formatter PCA 48 front doors 23 fuser 29 left cover 10 order of 5 rear cover 20 rear door 20 right cover 12 Index 99 tools, required 3 top cover 13, 16 replacing duplexing-paper-feed assembly (duplex model) 32 face-down-drive assembly (base model) 32 main motor 37 paper-pickup-gear assembly 52 parts 2 right cover, removing 12 rollers, pickup and separation; removing 6 S screwdrivers, required screws replacing 2 service tools, required 3 static precautions 2 supplies ordering 60 3 T tests post-service 4 print-quality 4 tips iii toner cartridge ordering 60 part number 60 tools, required 3 top cover, removing 13, 16 Tray 1 door, removing 23 W warnings iii 100 Index ENWW © 2012 Hewlett-Packard Development Company, L.P. www.hp.com *CF270-90977* *CF270-90977* CF270-90977
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.7 Linearized : No Author : HP LaserJet Content Design & Delivery Create Date : 2012:10:29 14:45:25-06:00 Keywords : Edition, 2, 11/2012 Modify Date : 2013:09:26 09:10:40-06:00 XMP Toolkit : Adobe XMP Core 5.4-c005 78.147326, 2012/08/23-13:03:03 Metadata Date : 2013:09:26 09:10:40-06:00 Format : application/pdf Title : HP LaserJet Pro 400 M401 Printer Series Repair Manual - ENWW Creator : HP LaserJet Content Design & Delivery Subject : Edition 2 11/2012 Document ID : uuid:835949c1-fd45-4fc7-a2f0-5667b733ca5b Instance ID : uuid:f81653c4-cdfa-4d5a-9234-12d6681fdf5e Startup Profile : Print Page Layout : SinglePage Page Mode : UseOutlines Page Count : 118EXIF Metadata provided by EXIF.tools