HP M401 a, n, d, dn, dw LaserJet Pro 400 Printer Repair Manual

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.

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

● 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.

4 Chapter 1 Removal and replacement ENWW

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)

8 Chapter 1 Removal and replacement ENWW

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

ENWW

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 .

14 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 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

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

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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

20 Chapter 1 Removal and replacement 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

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

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 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