LASERJET PRO 400
Repair Manual
M401
HP LaserJet Pro 400 M401 Printer Series
Repair Manual
Copyright and License
© 2012 Copyright Hewlett-Packard
Development Company, L.P.
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 1, 4/2012
Trademark Credits
Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation.
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.
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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 ....................................................... 9
Tray 2 and optional Tray 3 separation pad ................................................. 10
Covers and control panel ......................................................................................... 11
Left cover ................................................................................................ 11
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
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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
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Index ................................................................................................................................. 99
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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
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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) ............................................................................. 9
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) ................................................................ 10
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
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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
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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
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1 Removal and replacement
●
Removal and replacement strategy
●
Service approach
●
Removal and replacement procedures
ENWW 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.
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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
● 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.
ENWW 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
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.
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Parts removal order
Use the following diagram to determine which parts must be removed before removing other parts.
Figure 1-2 Parts-removal order
ENWW Service approach 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.
Remove the following components:
● Tray 2 cassette
● Left cover. See
Left cover on page 11 .
2.
Open the toner cartridge door, and then remove the toner cartridge.
6 Chapter 1 Removal and replacement ENWW
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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
2
3
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
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)
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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.
Remove the tray cassette from the product.
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
ENWW Removal and replacement procedures 9
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.
Remove the tray cassette from the product.
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
3.
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1
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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.
1.
Remove the Tray 2 cassette.
2.
Open the toner cartridge door and the rear jam access door.
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.
With the top and front edges loose, carefully slide the cover toward the back of the product, and then remove it.
ENWW 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.
With the back and top edges loose, carefully slide the cover toward the front of the product, and then remove it.
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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 11 .
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)
11
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)
11
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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● Top cover assembly. See
Top cover with LCD control-panel module on page 13 .
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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 11 .
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
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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
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6.
Lift the top-cover assembly off of the product to remove it.
Removal and replacement procedures 17
Touchscreen control panel
1.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● Top cover assembly. See
Top cover with touchscreen control-panel module on page 16 .
2.
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)
11
12
11
3.
Disconnect the flat cable (callout 1), and then remove the following parts:
● Holder (callout 2)
● Pin (callout 3)
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● 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 11 .
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 1
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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
2
1
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
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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 11 .
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 1
ENWW 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
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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 11 .
● 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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● 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 .
2.
Open the toner cartridge door and the rear jam access door.
ENWW 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 2
6.
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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● Rear cover, rear door, and feed assembly. See
Rear cover, rear door, and feed assembly on page 20 .
2.
Open the rear jam access door
ENWW 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
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)
11
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
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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● 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.
32 Chapter 1 Removal and replacement ENWW
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
1
5
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.
Removal and replacement procedures 33
Solenoids
Tray 1 solenoid
1.
Remove the following components:
● Tray 2 cassette
● Left cover. See
Left cover on page 11 .
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 2
34 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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● 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 .
2.
Open the toner cartridge door and the rear jam access door.
ENWW 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 11 .
● 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)
ENWW
3 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 4 1
5.
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)
3 2
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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● 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.
ENWW 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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● 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 .
ENWW 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)
11
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)
11
12
42 Chapter 1 Removal and replacement ENWW
4.
Disconnect seven connectors (callout 1).
Figure 1-56 Remove the engine controller assembly (3 of 9)
ENWW
11
5.
Release the cables (callout 1) from the cable guide (callout 2).
Figure 1-57 Remove the engine controller assembly (4 of 9)
11 12
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 4
44 Chapter 1 Removal and replacement ENWW
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 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.
Remove the following components:
● Tray 2 cassette
● Left cover. See
Left cover on page 11 .
46 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!
ESD sensitive component.
1.
Remove the following components:
● Tray 2 cassette
● Left cover. See
Left cover on page 11 .
● Wireless PCA (wireless models only). See
Wireless PCA on page 48 .
2.
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.
Remove the following components:
● Tray 2 cassette
● Left cover. See
Left cover on page 11 .
48 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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
● Left cover. See
Left cover on page 11 .
● Cartridge door and front cover assembly. See
Cartridge door and front cover assembly on page 23 .
ENWW 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.
Remove the following components:
● Tray 2 cassette
●
Right cover. See Right cover on page 12 .
2.
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.
Remove the following components.
● Tray 2 cassette
● Left cover. See
Left cover on page 11 .
52 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
2
3
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)
2
3
54 Chapter 1 Removal and replacement
1
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)
2
3
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)
2 3
1
56 Chapter 1 Removal and replacement 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.
●
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
ENWW 59
Order parts by authorized service providers
Order replacement parts
Table 2-1 Order parts, accessories, and supplies
Order supplies and paper
Order genuine HP parts or accessories
Order through service or support providers www.hp.com/go/suresupply www.hp.com/buy/parts
Contact an HP-authorized service or support provider.
Related documentation and software
Table 2-2 Related documentation and software
Item Description
HP LaserJet Pro 400 M401 Printer Series User Guide
HP LaserJet Pro 400 M401 Printer Series Repair Manual
HP LaserJet Pro 400 M401 Printer Series Troubleshooting
Manual
Product user guide
English repair manual (this manual)
English troubleshooting manual
Part number
CF270-90908 (English)
CF270-90977
CF270-91001
Supplies part numbers
Table 2-3 Supplies part numbers
Part Part number
Toner cartridge
Paper feeder
USB 2.0 cable
CF280A (standard)
CF280X (extended)
CF284A
C6518A
Type/size
Black toner cartridge
500-sheet Tray 3
(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
Item Description
HP LaserJet Pro 400 M401a Printer 220v WUR EMEA
Part number
CF270-69001 (exchange)
60 Chapter 2 Parts and diagrams ENWW
Table 2-4 Whole-unit replacement part numbers (continued)
Item Description
HP LaserJet Pro 400 M401d Printer
HP LaserJet Pro 400 M401n Printer
HP LaserJet Pro 400 M401dn Printer
HP LaserJet Pro 400 M401dw Printer
220v WUR EMEA
220v WUR CN/MY
220v WUR AP
110v WUR NAR/TW
220v WUR CN/MY
220v WUR AP/LAR
220v WUR CL/AR
110v WUR BR
110v WUR NAR/TW
220v WUR EMEA
220v WUR CN/MY
220v WUR AP/LAR
220v WUR CL/AR
110v WUR BR
110v WUR NAR/TW
220v WUR EMEA
220v WUR CN/MY
220v WUR AP/LAR
110v WUR BR
Part number
CF274-69001 (exchange)
CF274-67058 (replace)
CF274-69002 (exchange)
CZ195-69001 (exchange)
CZ195-67058 (replace)
CZ195-69002 (exchange)
CZ195-69003 (exchange)
CZ195-69004 (exchange)
CF278-69001 (exchange)
CF278-69002 (exchange)
CF278-67059 (replace)
CF278-69003 (exchange)
CF278-69004 (exchange)
CF278-69005 (exchange)
CF285-69001 (exchange)
CF285-69002 (exchange)
CF285-67059 (replace)
CF285-69003 (exchange)
CF285-69004 (exchange)
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 2 3 4 5
ENWW
2
5
6
3
4
11 10 9 8 7
Table 2-5 Assembly locations: HP LaserJet M401a, M401n, M401d models
Item Description Item Description
1 Cartridge door 7
LCD control panel
Jam removal door
Rear output door
Output bin
DIMM door
8
9
10
11
6
Rear cover (HP LaserJet M401a and M401n models) or duplex cover (HP LaserJet M401d model)
Power receptacle
Power switch
Tray 2 cassette
Multipurpose tray (Tray 1)
Assembly locations 63
HP LaserJet M401dn and M401dw models
Figure 2-2 Assembly locations: HP LaserJet M401dn and M401dw models
1 2 3 4 5
1
4
5
2
3
6
11 10 9 8 7
Table 2-6 Assembly locations: HP LaserJet M401dn and M401dw models
Item Description Item Description
Toner cartridge door
Touchscreen control panel
Jam removal door
Rear output door
Output bin
DIMM cover
7
8
9
10
11
Duplex cover
Power receptacle
Power button
Tray 2 cassette
Multipurpose tray (Tray 1)
6
64 Chapter 2 Parts and diagrams ENWW
Optional paper feeder
Figure 2-3 Assembly locations: optional paper feeder
1
1
2
3 2
Table 2-7 Assembly locations: optional paper feeder
Item Description Item Description
Positioning pins
Option interface connector
3 Tray 3 cassette
ENWW 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
66
5
3
DUPLEX MODEL
Chapter 2 Parts and diagrams
1
A02
8
A01
(J215)
10 9
(J1001)
7
6
ENWW
Table 2-8 Covers, panels, and doors (LCD control panel models)
5
6
3
4
2
3
Ref
1
7
8
9
10
11
Description
Cartridge door assembly
Cover, top
Cover, rear (duplex model)
Cover, rear (simplex model)
Cover, right
Cover, left
Cover, outer, front
Switch, power button assembly
Cover, inner, front
Lever, power supply button
Power button PCA
Control-panel assembly
Part number
RM1-9145-000CN
RM1-9180-000CN
RM1-9161-000CN
RM1-9163-000CN
RM1-9171-000CN
RM1-9174-000CN
RC3-2533-000CN
RM1-9125-000CN
RC3-2532-000CN
RC3-2545-000CN
RM1-9039-000CN
RM1-9149-000CN
1
1
1
1
1
1
Qty
1
1
1
1
1
1
ENWW Covers, panels, and doors 67
Figure 2-5 Covers, panels, and doors (touchscreen control panel models)
14
2
11
12
A03
A10
13
A02
A02
3
A11 (J2)
A09
A08
A08
A04
A05
A06
A07
1
4
A01
(J215)
10 9 (J1001)
7
8
5
A02
6
68 Chapter 2 Parts and diagrams ENWW
Table 2-9 Covers, panels, and doors (touchscreen control panel models)
12
13
14
14
8
9
10
11
6
7
4
5
2
3
Ref
1
Description
Cartridge door assembly
Cover, top
Cover, rear
Cover, right
Cover, left
Cover, outer, front
Switch, power button assembly
Cover, inner, front
Lever, power supply button
Power button PCA
Arm, control panel
Cover, cable
Plate, base
Control-panel assembly (HP Laserjet M401dn model only)
Control-panel assembly (HP Laserjet M401dw model only)
Part number
RM1-9145-000CN
RM1-9179-000CN
RM1-9161-000CN
RM1-9171-000CN
RM1-9123-000CN
RC3-2533-000CN
RM1-9125-000CN
RC3-2532-000CN
RC3-2545-000CN
RM1-9039-000CN
RC3-2584-000CN
RC3-2585-000CN
RC3-2586-000CN
CF270-60101
CF285-60101
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Qty
1
ENWW Covers, panels, and doors 69
Internal assemblies
Figure 2-6 Internal components (1 of 5)
A02 A04
1
A05
A06
A07
A14
A15
A03
A12
A14
A13
A
A16
A17
A
A10
A03
A11
A03
A08
A01
A09
A18
70 Chapter 2 Parts and diagrams ENWW
Table 2-10 Internal components (1 of 5)
Ref
1
1
Description
Fuser (110V)
Fuser (220V)
Part number
RM1-8808-000CN
RM1-8809-000CN
Qty
1
1
ENWW Internal assemblies 71
Figure 2-7 Internal components (2 of 5)
A21
A12
A01
(J202)
1
A02
A03
(M1)
(J1202)
(J1202)
A11
A15
A31 A10
TOUCHSCREEN
MODEL
(J101)
3
A04
A05
A06
A09
A07
A08
A15
A39
A15
A38
A37
A31
A36
A15
A34
A15
A15
A33
A15
A15
A15
A35
A15
A31
A30
A29
A28
A27 A26
A24
A25
A32
A31
2
A23
A22
6
A16
A17
A15
5
4
A13
A14
A18
A19
A20
72 Chapter 2 Parts and diagrams ENWW
Table 2-11 Internal components (2 of 5)
4
5
6
2
3
Ref
1
Description
Main motor assembly
Bushing
Separation pad, multipurpose tray
Bushing
Paper pickup gear assembly
Paper pickup roller assembly
Part number
RM1-9042-000CN
RC2-8263-000CN
RL1-2115-000CN
RC2-6131-000CN
RM1-7360-000CN
RM1-9168-000CN
1
1
1
1
1
Qty
1
ENWW Internal assemblies 73
Figure 2-8 Internal components (3 of 5)
A03
(J1103)
(J802)
A01
A02
A13 4
1
(J5)
(J801)
A23
A24
A22
3
A12
A05
A13
A04
A07
A06
A08
A09
(J581)
A10
2 A26
A17
A12
A14
A19
A21
A18
A20
A25 A11
A12
(J203)
A13
A16
A15
6
5
74 Chapter 2 Parts and diagrams ENWW
Table 2-12 Internal components (3 of 5)
4
5
6
2
3
Ref
1
Description
Cable, flexible, flat
Paper feed guide assembly
Laser scanner assembly
Registration roller assembly
Transfer roller assembly
Sensor assembly
Part number
RK2-4452-000CN
RM1-9122-000CN
RM1-9135-000CN
RM1-8806-000CN
RM1-9175-000CN
RM1-8807-000CN
1
1
1
1
1
Qty
1
ENWW Internal assemblies 75
Figure 2-9 Internal components (4 of 5)
(J207)
A12
(J1102)
A11
A24
A10
(SW301)
A24
A08
A22
A21
A09
A23
A01
4
8
7
A19
A03
A02
A24
1
2
(FM1)
(J1105)
A01
(J211)
A04
(J1205D)
(J1205F)
A05
(J207)
A06
A01
(SL2)
(J1104)
A01
A07
3
A01
A14
A13
A15
5
A18
A16
A17
A16
6
76 Chapter 2 Parts and diagrams ENWW
Table 2-13 Internal components (4 of 5)
7
8
5
6
2
4
Ref
1
Description
Fan
Connecting PCA
Solenoid
Separation pad holder assembly
Cassette assembly (Tray 2)
Pickup roller, multipurpose tray (Tray 1)
Multipurpose tray pickup gear assembly
Part number
RK2-4418-000CN
RM1-9047-000CN
RK2-2731-000CN
RM1-7365-000CN
RM1-9137-000CN
RL1-3307-000CN
RM1-9127-000CN
1
1
1
1
1
1
Qty
1
ENWW Internal assemblies 77
Figure 2-10 Internal components (5 of 5)
(FT3)
DUPLEX MODEL
A
(J7)
(FT1)
(FT2)
1
A03
A04
DUPLEX MODEL
SIMPLEX MODEL
3
A01
A02
4
A01
DUPLEX MODEL
3
A01
2
A
A01
USB MODEL
A08
A03
78 Chapter 2 Parts and diagrams ENWW
Table 2-14 Internal components (5 of 5)
3
3
4
1
2
Ref
1
Description
Engine controller assembly (DC controller) — 110V
Engine controller assembly (DC controller) — 220V
Duplexing paper feed assembly (duplex models only)
Reverse drive assembly (duplex models only)
Face-down drive assembly (simplex models only)
Solenoid, duplex
Part number
RM1-9164-000CN
RM1-9165-000
RM1-9153-000CN
RM1-9157-000CN
RM1-9160-000CN
RK2-2733-000CN
1
1
1
1
1
Qty
1
ENWW Internal assemblies 79
2
1
Figure 2-11 PCA location
3
4
5
6
80 Chapter 2 Parts and diagrams ENWW
4
5
3
3
6
Table 2-15 PCA location
1
2
1
1
2
1
1
Ref
1
Description
Formatter PCA (HP LaserJet M401a, M401d models)
Formatter PCA (HP LaserJet M401n model)
Formatter PCA (HP LaserJet M401dn, M401dw models)
Formatter PCA (China, HP LaserJet M401a, M401d models)
Formatter PCA (China, HP LaserJet M401n model)
Formatter PCA (China, HP LaserJet M401dn, M401dw models)
Wireless PCA (HP LaserJet M401dw model only)
Wireless PCA holder (not pictured — HP LaserJet M401dw model only)
Engine controller assembly (DC controller) PCA — 110V
Engine controller assembly (DC controller) PCA — 220V
Connecting PCA
Power switch PCA
Universal serial bus (USB) PCA (HP LaserJet M401dn and
M401dw models only)
Part number
CF148-60001
CF149-60001
CF150-60001
CF148-69001
CF149-69001
CF150-69001
CF270-60101
CF286-40014
RM1-9164-000CN
RM1-9165-000CN
RM1-9047-000CN
RM1-9039-000CN
CF368-60001
1
1
1
1
1
1
1
Qty
1
1
1
1
1
1
ENWW 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
2
3
Ref
1
Description
Cover, left
Cover, right
Cover, rear
Part number
RC3-2618-000CN
RM1-9316-000CN
RC3-2621-000CN
1
1
Qty
1
ENWW Input devices 83
Paper feeder main body (1 of 2)
Figure 2-13 Paper feeder main body (1 of 2)
A05
A13
A07
A07
A18
A04
A06
A02
1
A04
A03
A01 A07
(SL4)
(J1202)
A09
A08
A07
2
A07
A14
A07
A07
A17
A11
A12
A07
A07
A10
A07
A07
A16
A15
A12
84 Chapter 2 Parts and diagrams ENWW
Table 2-17 Paper feeder main body (1 of 2)
Ref
1
2
Description
Paper pickup gear assembly
Solenoid
Part number
RM1-7360-000CN
RK2-0426-000CN
Qty
1
1
ENWW Input devices 85
Paper feeder main body (2 of 2)
Figure 2-14 Paper feeder main body (2 of 2)
A04
A11
A04
A02
A04
A03
A01
1
A09
(J1205)
A04
A10
A07
A13
(PS1201)
(J1203)
5
A07
2
(J1205)
A04
A12
A04
A06
A08
A05
A06 4
3
86 Chapter 2 Parts and diagrams ENWW
Table 2-18 Paper feeder main body (2 of 2)
4
5
2
3
Ref
1
Description
Paper feeder pickup roller assembly
Paper feeder driver PCA
Paper feeder cassette (Tray 3)
Paper feeder separation pad holder assembly
Paper feeder paper sensor PCA
Part number
RM1-9168-000CN
RM1-9297-000CN
RM1-9313-000CN
RM1-6303-000CN
RM1-1267-000CN
1
1
1
1
Qty
1
ENWW Input devices 87
Alphabetical parts list
Table 2-19 Alphabetical parts list
Description
Arm, control panel
Bushing
Bushing
Cable, flexible, flat
Cartridge door assembly
Cartridge door assembly
Cassette assembly (Tray 2)
Connecting PCA
Connecting PCA
Control-panel assembly
Control-panel assembly (HP Laserjet M401dn model only)
Control-panel assembly (HP Laserjet M401dw model only)
Cover, cable
Cover, inner, front
Cover, inner, front
Cover, left
88 Chapter 2 Parts and diagrams
Part number
RC3-2584-000CN
RC2-8263-000CN
RC2-6131-000CN
RK2-4452-000CN
RM1-9145-000CN
RM1-9145-000CN
RM1-9137-000CN
RM1-9047-000CN
RM1-9047-000CN
RM1-9149-000CN
CF270-60101
CF285-60101
RC3-2585-000CN
RC3-2532-000CN
RC3-2532-000CN
RM1-9174-000CN
Table and page
Covers, panels, and doors
(touchscreen control panel models) on page 69
Internal components (2 of 5) on page 73
Internal components (2 of 5) on page 73
Internal components (3 of 5) on page 75
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Internal components (4 of 5) on page 77
Internal components (4 of 5) on page 77
PCA location on page 81
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
ENWW
ENWW
Table 2-19 Alphabetical parts list (continued)
Description
Cover, left
Cover, left
Cover, outer, front
Cover, outer, front
Cover, rear
Cover, rear
Cover, rear (duplex model)
Cover, rear (simplex model)
Cover, right
Cover, right
Cover, right
Cover, top
Cover, top
Duplexing paper feed assembly (duplex models only)
Engine controller assembly (DC controller) PCA — 110V
Engine controller assembly (DC controller) PCA — 220V
Engine controller assembly (DC controller) — 110V
Part number
RM1-9123-000CN
RC3-2618-000CN
RC3-2533-000CN
RC3-2533-000CN
RM1-9161-000CN
RC3-2621-000CN
RM1-9161-000CN
RM1-9163-000CN
RM1-9171-000CN
RM1-9171-000CN
RM1-9316-000CN
RM1-9180-000CN
RM1-9179-000CN
RM1-9153-000CN
RM1-9164-000CN
RM1-9165-000CN
RM1-9164-000CN
Table and page
Covers, panels, and doors
(touchscreen control panel models) on page 69
Paper feeder covers on page 83
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(touchscreen control panel models) on page 69
Paper feeder covers on page 83
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Paper feeder covers on page 83
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Internal components (5 of 5) on page 79
PCA location on page 81
PCA location on page 81
Internal components (5 of 5) on page 79
Alphabetical parts list 89
Table 2-19 Alphabetical parts list (continued)
Description
Engine controller assembly (DC controller) — 220V
Part number
RM1-9165-000
Face-down drive assembly (simplex models only)
Fan
RM1-9160-000CN
RK2-4418-000CN
Formatter PCA (China, HP LaserJet M401a, M401d models)
Formatter PCA (China, HP LaserJet M401dn, M401dw models)
Formatter PCA (China, HP LaserJet M401n model)
Formatter PCA (HP LaserJet M401a, M401d models)
Formatter PCA (HP LaserJet M401dn, M401dw models)
Formatter PCA (HP LaserJet M401n model)
Fuser (110V)
CF148-69001
CF150-69001
CF149-69001
CF148-60001
CF150-60001
CF149-60001
RM1-8808-000CN
Fuser (220V)
Laser scanner assembly
Lever, power supply button
RM1-8809-000CN
RM1-9135-000CN
RC3-2545-000CN
Lever, power supply button
Main motor assembly
Multipurpose tray pickup gear assembly
Paper feed guide assembly
Paper feeder cassette (Tray 3)
Paper feeder driver PCA
Paper feeder paper sensor PCA
Paper feeder pickup roller assembly
RC3-2545-000CN
RM1-9042-000CN
RM1-9127-000CN
RM1-9122-000CN
RM1-9313-000CN
RM1-9297-000CN
RM1-1267-000CN
RM1-9168-000CN
Table and page
Internal components (5 of 5) on page 79
Internal components (5 of 5) on page 79
Internal components (4 of 5) on page 77
PCA location on page 81
PCA location on page 81
PCA location on page 81
PCA location on page 81
PCA location on page 81
PCA location on page 81
Internal components (1 of 5) on page 71
Internal components (1 of 5) on page 71
Internal components (3 of 5) on page 75
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Internal components (2 of 5) on page 73
Internal components (4 of 5) on page 77
Internal components (3 of 5) on page 75
Paper feeder main body
(2 of 2) on page 87
Paper feeder main body
(2 of 2) on page 87
Paper feeder main body
(2 of 2) on page 87
Paper feeder main body
(2 of 2) on page 87
90 Chapter 2 Parts and diagrams ENWW
ENWW
Table 2-19 Alphabetical parts list (continued)
Description
Paper feeder separation pad holder assembly
Paper pickup gear assembly
Paper pickup gear assembly
Paper pickup roller assembly
Pickup roller, multipurpose tray (Tray 1)
Plate, base
Part number
RM1-6303-000CN
RM1-7360-000CN
RM1-7360-000CN
RM1-9168-000CN
RL1-3307-000CN
RC3-2586-000CN
Power button PCA
Power button PCA
Power switch PCA
Registration roller assembly
Reverse drive assembly (duplex models only)
Sensor assembly
Separation pad holder assembly
Separation pad, multipurpose tray
Solenoid
Solenoid
Solenoid, duplex
Switch, power button assembly
Switch, power button assembly
RM1-9039-000CN
RM1-9039-000CN
RM1-9039-000CN
RM1-8806-000CN
RM1-9157-000CN
RM1-8807-000CN
RM1-7365-000CN
RL1-2115-000CN
RK2-2731-000CN
RK2-0426-000CN
RK2-2733-000CN
RM1-9125-000CN
RM1-9125-000CN
Table and page
Paper feeder main body
(2 of 2) on page 87
Internal components (2 of 5) on page 73
Paper feeder main body
(1 of 2) on page 85
Internal components (2 of 5) on page 73
Internal components (4 of 5) on page 77
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
PCA location on page 81
Internal components (3 of 5) on page 75
Internal components (5 of 5) on page 79
Internal components (3 of 5) on page 75
Internal components (4 of 5) on page 77
Internal components (2 of 5) on page 73
Internal components (4 of 5) on page 77
Paper feeder main body
(1 of 2) on page 85
Internal components (5 of 5) on page 79
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Alphabetical parts list 91
Table 2-19 Alphabetical parts list (continued)
Description
Transfer roller assembly
Universal serial bus (USB) PCA (HP LaserJet M401dn and
M401dw models only)
Wireless PCA (HP LaserJet M401dw model only)
Wireless PCA holder (not pictured — HP LaserJet M401dw model only)
Part number
RM1-9175-000CN
CF368-60001
CF270-60101
CF286-40014
Table and page
Internal components (3 of 5) on page 75
PCA location on page 81
PCA location on page 81
PCA location on page 81
92 Chapter 2 Parts and diagrams ENWW
Numerical parts list
Table 2-20 Numerical parts list
Part number Description
CF148-60001
CF148-69001
CF149-60001
CF149-69001
CF150-60001
CF150-69001
CF270-60101
Formatter PCA (HP LaserJet M401a, M401d models)
Formatter PCA (China, HP LaserJet M401a, M401d models)
Formatter PCA (HP LaserJet M401n model)
Formatter PCA (China, HP LaserJet M401n model)
Formatter PCA (HP LaserJet M401dn, M401dw models)
Formatter PCA (China, HP LaserJet M401dn, M401dw models)
Control-panel assembly (HP Laserjet M401dn model only)
CF270-60101
CF285-60101
CF286-40014
Wireless PCA (HP LaserJet M401dw model only)
Control-panel assembly (HP Laserjet M401dw model only)
Table and page
PCA location on page 81
PCA location on page 81
PCA location on page 81
PCA location on page 81
PCA location on page 81
PCA location on page 81
Covers, panels, and doors
(touchscreen control panel models) on page 69
PCA location on page 81
Covers, panels, and doors
(touchscreen control panel models) on page 69
PCA location on page 81
CF368-60001
RC2-6131-000CN
Wireless PCA holder (not pictured — HP LaserJet M401dw model only)
Universal serial bus (USB) PCA (HP LaserJet M401dn and
M401dw models only)
Bushing
PCA location on page 81
RC2-8263-000CN
RC3-2532-000CN
RC3-2532-000CN
RC3-2533-000CN
RC3-2533-000CN
RC3-2545-000CN
Bushing
Cover, inner, front
Cover, inner, front
Cover, outer, front
Cover, outer, front
Lever, power supply button
Internal components (2 of 5) on page 73
Internal components (2 of 5) on page 73
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
ENWW Numerical parts list 93
Table 2-20 Numerical parts list (continued)
Part number Description
RC3-2545-000CN Lever, power supply button
RC3-2584-000CN
RC3-2585-000CN
Arm, control panel
Cover, cable
RC3-2586-000CN
RC3-2618-000CN
RC3-2621-000CN
RK2-0426-000CN
RK2-2731-000CN
RK2-2733-000CN
RK2-4418-000CN
RK2-4452-000CN
RL1-2115-000CN
RL1-3307-000CN
RM1-1267-000CN
RM1-6303-000CN
RM1-7360-000CN
RM1-7360-000CN
RM1-7365-000CN
RM1-8806-000CN
Plate, base
Cover, left
Cover, rear
Solenoid
Solenoid
Solenoid, duplex
Fan
Cable, flexible, flat
Separation pad, multipurpose tray
Pickup roller, multipurpose tray (Tray 1)
Paper feeder paper sensor PCA
Paper feeder separation pad holder assembly
Paper pickup gear assembly
Paper pickup gear assembly
Separation pad holder assembly
Registration roller assembly
94 Chapter 2 Parts and diagrams
Table and page
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(touchscreen control panel models) on page 69
Paper feeder covers on page 83
Paper feeder covers on page 83
Paper feeder main body
(1 of 2) on page 85
Internal components (4 of 5) on page 77
Internal components (5 of 5) on page 79
Internal components (4 of 5) on page 77
Internal components (3 of 5) on page 75
Internal components (2 of 5) on page 73
Internal components (4 of 5) on page 77
Paper feeder main body
(2 of 2) on page 87
Paper feeder main body
(2 of 2) on page 87
Internal components (2 of 5) on page 73
Paper feeder main body
(1 of 2) on page 85
Internal components (4 of 5) on page 77
Internal components (3 of 5) on page 75
ENWW
ENWW
Table 2-20 Numerical parts list (continued)
Part number Description
RM1-8807-000CN Sensor assembly
RM1-8808-000CN
RM1-8809-000CN
RM1-9039-000CN
Fuser (110V)
Fuser (220V)
Power button PCA
RM1-9039-000CN Power button PCA
RM1-9039-000CN
RM1-9042-000CN
RM1-9047-000CN
RM1-9047-000CN
RM1-9122-000CN
RM1-9123-000CN
RM1-9125-000CN
Power switch PCA
Main motor assembly
Connecting PCA
Connecting PCA
Paper feed guide assembly
Cover, left
Switch, power button assembly
RM1-9125-000CN
RM1-9127-000CN
RM1-9135-000CN
RM1-9137-000CN
RM1-9145-000CN
RM1-9145-000CN
Switch, power button assembly
Multipurpose tray pickup gear assembly
Laser scanner assembly
Cassette assembly (Tray 2)
Cartridge door assembly
Cartridge door assembly
Table and page
Internal components (3 of 5) on page 75
Internal components (1 of 5) on page 71
Internal components (1 of 5) on page 71
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
PCA location on page 81
Internal components (2 of 5) on page 73
Internal components (4 of 5) on page 77
PCA location on page 81
Internal components (3 of 5) on page 75
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Internal components (4 of 5) on page 77
Internal components (3 of 5) on page 75
Internal components (4 of 5) on page 77
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Numerical parts list 95
96
Table 2-20 Numerical parts list (continued)
Part number Description
RM1-9149-000CN Control-panel assembly
RM1-9153-000CN
RM1-9157-000CN
RM1-9160-000CN
RM1-9161-000CN
Duplexing paper feed assembly (duplex models only)
Reverse drive assembly (duplex models only)
Face-down drive assembly (simplex models only)
Cover, rear (duplex model)
RM1-9161-000CN
RM1-9163-000CN
RM1-9164-000CN
RM1-9164-000CN
RM1-9165-000
RM1-9165-000CN
RM1-9168-000CN
RM1-9168-000CN
RM1-9171-000CN
RM1-9171-000CN
RM1-9174-000CN
RM1-9175-000CN
RM1-9179-000CN
Cover, rear
Cover, rear (simplex model)
Engine controller assembly (DC controller) — 110V
Engine controller assembly (DC controller) PCA — 110V
Engine controller assembly (DC controller) — 220V
Engine controller assembly (DC controller) PCA — 220V
Paper pickup roller assembly
Paper feeder pickup roller assembly
Cover, right
Cover, right
Cover, left
Transfer roller assembly
Cover, top
Chapter 2 Parts and diagrams
Table and page
Covers, panels, and doors
(LCD control panel models) on page 67
Internal components (5 of 5) on page 79
Internal components (5 of 5) on page 79
Internal components (5 of 5) on page 79
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
Internal components (5 of 5) on page 79
PCA location on page 81
Internal components (5 of 5) on page 79
PCA location on page 81
Internal components (2 of 5) on page 73
Paper feeder main body
(2 of 2) on page 87
Covers, panels, and doors
(LCD control panel models) on page 67
Covers, panels, and doors
(touchscreen control panel models) on page 69
Covers, panels, and doors
(LCD control panel models) on page 67
Internal components (3 of 5) on page 75
Covers, panels, and doors
(touchscreen control panel models) on page 69
ENWW
Table 2-20 Numerical parts list (continued)
Part number Description
RM1-9180-000CN Cover, top
RM1-9297-000CN
RM1-9313-000CN
RM1-9316-000CN
Paper feeder driver PCA
Paper feeder cassette (Tray 3)
Cover, right
Table and page
Covers, panels, and doors
(LCD control panel models) on page 67
Paper feeder main body
(2 of 2) on page 87
Paper feeder main body
(2 of 2) on page 87
Paper feeder covers on page 83
ENWW 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 11
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
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 11
location assemblies 0
M main motor
replacing 37
N
notes 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 11
order of 5
rear cover 20 rear door 20
right cover 12
ENWW 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 3
screws
replacing 2
service
tools, required 3
static precautions 2
supplies
ordering 60
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
