LASERJET PRO MFP
Repair Manual
M125-126
M127-128
M127-128
HP LaserJet Pro MFP M125, M126, M127,
M128
Repair Manual
Copyright and License
Trademark Credits
© 2013 Copyright Hewlett-Packard
Development Company, L.P.
Microsoft®, Windows®, Windows® XP, and
Windows Vista® are U.S. registered trademarks
of Microsoft Corporation.
Reproduction, adaptation, or translation
without prior written permission is prohibited,
except as allowed under the copyright laws.
The information contained herein is subject to
change without notice.
The only warranties for HP products and
services are set forth in the express warranty
statements accompanying such products and
services. Nothing herein should be construed
as constituting an additional warranty. HP shall
not be liable for technical or editorial errors or
omissions contained herein.
Part number: CZ183-90905
Edition 1, 9/2013
Conventions used in this guide
TIP:
NOTE:
Tips provide helpful hints or shortcuts.
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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Conventions used in this guide
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Table of contents
1 Removal and replacement .............................................................................................................................. 1
Removal and replacement strategy ...................................................................................................................... 2
Introduction ......................................................................................................................................... 2
Required tools ..................................................................................................................................... 2
Types of screws ................................................................................................................................... 3
Service approach ................................................................................................................................................... 4
Before performing service .................................................................................................................. 4
After performing service ..................................................................................................................... 4
Parts removal order ............................................................................................................................ 4
Removal and replacement procedures ................................................................................................................. 5
Customer-replaceable parts ............................................................................................................... 5
Toner cartridge ................................................................................................................. 5
Input tray ........................................................................................................................... 6
Short-media extender ...................................................................................................... 7
Pickup roller ...................................................................................................................... 7
Separation pad ................................................................................................................ 10
Handset (M128fp model only) ........................................................................................ 11
Covers and external components ..................................................................................................... 12
Paper-delivery tray (output bin extension) ................................................................... 12
Left cover ........................................................................................................................ 13
Remove the left cover .................................................................................. 13
Scanner assembly ........................................................................................................... 14
Remove the scanner assembly .................................................................... 14
Cartridge door ................................................................................................................. 17
Remove the cartridge door .......................................................................... 17
Front cover and control-panel assembly ....................................................................... 19
Remove the front cover ............................................................................... 19
Remove the control-panel assembly ........................................................... 22
Right cover ...................................................................................................................... 24
Remove the right cover ................................................................................ 24
Top cover and image scanner lock ................................................................................. 27
Remove the top cover and image scanner lock ........................................... 27
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Rear cover ....................................................................................................................... 29
Remove the rear cover ................................................................................. 29
Reinstall the rear cover ................................................................................ 30
Main assemblies ................................................................................................................................ 31
Transfer roller ................................................................................................................. 31
Left-side PCAs ................................................................................................................. 33
Wireless PCA (wireless models only) ........................................................... 35
Formatter PCA .............................................................................................. 37
Fax PCA (fax models only) ............................................................................ 42
Laser scanner assembly and cable ................................................................................. 43
Remove the laser scanner assembly and cable ........................................... 43
Motor PCA and motor ...................................................................................................... 45
Remove the motor PCA and motor .............................................................. 45
Engine controller PCA ..................................................................................................... 51
Remove the engine controller PCA .............................................................. 51
Reinstall the engine controller PCA ............................................................. 57
Fuser and delivery sensor PCA ....................................................................................... 60
Remove the fuser and delivery sensor PCA ................................................. 60
Reinstall the fuser ........................................................................................ 62
Pickup assembly and pickup sensor PCA ....................................................................... 64
Remove the pickup assembly and pickup sensor PCA ................................ 64
Reinstall tips for the grounding spring and lifting plate ............................. 66
Scanner and document feeder components .................................................................................... 69
Separate the scanner lid or document feeder from the scan base ............................... 69
Scanner components ...................................................................................................... 71
Scan bezel ..................................................................................................... 71
Scan drive system ........................................................................................ 73
Scan FFC cable .............................................................................................. 74
Scan motor ................................................................................................... 76
Scanner spring assembly ............................................................................. 78
Document feeder components ....................................................................................... 80
Document feeder (ADF) top cover ................................................................ 80
ADF core ........................................................................................................ 81
ADF separation pad ...................................................................................... 82
ADF inner tray ............................................................................................... 86
ADF input guides and gear ........................................................................... 86
ADF pre-pickup arm assembly ..................................................................... 89
2 Parts and diagrams ...................................................................................................................................... 91
Order parts by authorized service providers ...................................................................................................... 92
Order replacement parts ................................................................................................................... 92
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Related documentation .................................................................................................................... 92
Supplies part numbers ...................................................................................................................... 92
Customer replaceable units (CRU) kit part numbers ........................................................................ 93
Whole-unit replacement part numbers ............................................................................................ 94
How to use the parts lists and diagrams ............................................................................................................. 95
Covers and external components ....................................................................................................................... 96
Internal assemblies ............................................................................................................................................. 98
Internal assemblies (1 of 3) .............................................................................................................. 98
Internal assemblies (2 of 3) ............................................................................................................ 100
Internal assemblies (3 of 3) ............................................................................................................ 102
Scanner and document feeder components ..................................................................................................... 104
Scanner lid, base models ................................................................................................................ 104
Scanner assembly, base models .................................................................................................... 106
Scan drive system, all models ........................................................................................................ 108
Scanner and document feeder assembly, fax models ................................................................... 110
Scanner assembly, fax models ....................................................................................................... 112
Document feeder assembly, fax models ........................................................................................ 114
Document feeder top cover, fax models ........................................................................................ 116
Document feeder core, fax models ................................................................................................ 118
Alphabetical parts list ....................................................................................................................................... 120
Numerical parts list ........................................................................................................................................... 124
Index ........................................................................................................................................................... 129
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List of tables
Table 1-1 Types of screws .................................................................................................................................................... 3
Table 2-1 Order parts, accessories, and supplies .............................................................................................................. 92
Table 2-2 Related documentation ..................................................................................................................................... 92
Table 2-3 Supplies part numbers ....................................................................................................................................... 92
Table 2-4 Customer replaceable units (CRU) kit part numbers ......................................................................................... 93
Table 2-5 Whole-unit replacement part numbers ............................................................................................................. 94
Table 2-6 Covers and external components ...................................................................................................................... 97
Table 2-7 Internal assemblies (1 of 3) ............................................................................................................................... 99
Table 2-8 Internal assemblies (2 of 3) ............................................................................................................................. 101
Table 2-9 Internal assemblies (3 of 3) ............................................................................................................................. 103
Table 2-10 Scanner lid, base models ............................................................................................................................... 105
Table 2-11 Scanner assembly, base models ................................................................................................................... 107
Table 2-12 Scan drive system, all models ....................................................................................................................... 109
Table 2-13 Scanner and document feeder assembly, fax models .................................................................................. 111
Table 2-14 Scanner assembly, fax models ...................................................................................................................... 113
Table 2-15 Document feeder assembly, fax models ...................................................................................................... 115
Table 2-16 Document feeder top cover, fax models ....................................................................................................... 117
Table 2-17 Document feeder core, fax models ............................................................................................................... 119
Table 2-18 Alphabetical parts list .................................................................................................................................... 120
Table 2-19 Numerical parts list ........................................................................................................................................ 124
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List of figures
Figure 1-1 Screwdrivers ........................................................................................................................................................ 2
Figure 1-2 Remove the toner cartridge (1 of 3) ................................................................................................................... 5
Figure 1-3 Remove the toner cartridge (2 of 3) ................................................................................................................... 5
Figure 1-4 Remove the toner cartridge (3 of 3) ................................................................................................................... 6
Figure 1-5 Remove the input tray ........................................................................................................................................ 6
Figure 1-6 Remove the short-media extender .................................................................................................................... 7
Figure 1-7 Remove the pickup roller (1 of 5) ....................................................................................................................... 7
Figure 1-8 Remove the pickup roller (2 of 5) ....................................................................................................................... 8
Figure 1-9 Remove the pickup roller (3 of 5) ....................................................................................................................... 8
Figure 1-10 Remove the pickup roller (4 of 5) ..................................................................................................................... 9
Figure 1-11 Remove the pickup roller (5 of 5) ..................................................................................................................... 9
Figure 1-12 Remove the separation pad (1 of 2) ............................................................................................................... 10
Figure 1-13 Remove the separation pad (2 of 2) ............................................................................................................... 10
Figure 1-14 Remove the handset (1 of 2) .......................................................................................................................... 11
Figure 1-15 Remove the handset (2 of 2) .......................................................................................................................... 11
Figure 1-16 Remove the paper-delivery tray .................................................................................................................... 12
Figure 1-17 Remove the left cover (1 of 2) ........................................................................................................................ 13
Figure 1-18 Remove the left cover (2 of 2) ........................................................................................................................ 13
Figure 1-19 Remove the scanner assembly (1 of 4) .......................................................................................................... 14
Figure 1-20 Remove the scanner assembly (2 of 4) .......................................................................................................... 15
Figure 1-21 Remove the scanner assembly (3 of 4) .......................................................................................................... 15
Figure 1-22 Remove the scanner assembly (4 of 4) .......................................................................................................... 16
Figure 1-23 Remove the cartridge door (1 of 3) ................................................................................................................ 17
Figure 1-24 Remove the cartridge door (2 of 3) ................................................................................................................ 17
Figure 1-25 Remove the cartridge door (3 of 3) ................................................................................................................ 18
Figure 1-26 Remove the front cover (1 of 5) ..................................................................................................................... 19
Figure 1-27 Remove the front cover (2 of 5) ..................................................................................................................... 20
Figure 1-28 Remove the front cover (3 of 5) ..................................................................................................................... 20
Figure 1-29 Remove the front cover (4 of 5) ..................................................................................................................... 21
Figure 1-30 Remove the front cover (5 of 5) ..................................................................................................................... 21
Figure 1-31 Remove the control-panel assembly (1 of 4) ................................................................................................ 22
Figure 1-32 Remove the control-panel assembly (2 of 4) ................................................................................................ 22
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Figure 1-33 Remove the control-panel assembly (3 of 4) ................................................................................................ 23
Figure 1-34 Remove the control-panel assembly (4 of 4) ................................................................................................ 23
Figure 1-35 Remove the right cover (1 of 5) ...................................................................................................................... 24
Figure 1-36 Remove the right cover (2 of 5) ...................................................................................................................... 25
Figure 1-37 Remove the right cover (3 of 5) ...................................................................................................................... 25
Figure 1-38 Remove the right cover (4 of 5) ...................................................................................................................... 26
Figure 1-39 Remove the right cover (5 of 5) ...................................................................................................................... 26
Figure 1-40 Remove the top cover ..................................................................................................................................... 27
Figure 1-41 Remove the image scanner lock ..................................................................................................................... 28
Figure 1-42 Reinstall the top cover .................................................................................................................................... 28
Figure 1-43 Remove the rear cover ................................................................................................................................... 29
Figure 1-44 Reinstall the rear cover .................................................................................................................................. 30
Figure 1-45 Remove the transfer roller (1 of 4) ................................................................................................................ 31
Figure 1-46 Remove the transfer roller (2 of 4) ................................................................................................................ 31
Figure 1-47 Remove the transfer roller (3 of 4) ................................................................................................................ 32
Figure 1-48 Remove the transfer roller (4 of 4) ................................................................................................................ 32
Figure 1-49 PCA layout for the base models (M125a, M125r, M125ra) ............................................................................ 33
Figure 1-50 PCA layout for the base + wireless models (M125nw, M126nw, M125rnw) ................................................. 33
Figure 1-51 PCA layout for the fax models (M127fn, M128fn, M128fp) ........................................................................... 34
Figure 1-52 PCA layout for the fax + wireless models (M127fw, M128fw) ....................................................................... 34
Figure 1-53 Remove the wireless PCA (1 of 3) ................................................................................................................... 19
Figure 1-54 Remove the wireless PCA (2 of 3) ................................................................................................................... 35
Figure 1-55 Remove the wireless PCA (3 of 3) ................................................................................................................... 36
Figure 1-56 Reinstall the wireless PCA .............................................................................................................................. 36
Figure 1-57 Remove the formatter PCA for base models (1 of 2) ..................................................................................... 37
Figure 1-58 Remove the formatter PCA for base models (2 of 2) ..................................................................................... 37
Figure 1-59 Remove the formatter PCA for base + wireless models (1 of 2) ................................................................... 38
Figure 1-60 Remove the formatter PCA for base + wireless models (2 of 2) ................................................................... 38
Figure 1-61 Remove the formatter PCA for fax models (1 of 2) ....................................................................................... 39
Figure 1-62 Remove the formatter PCA for fax models (2 of 2) ....................................................................................... 39
Figure 1-63 Remove the formatter PCA for fax + wireless models (1 of 4) ...................................................................... 40
Figure 1-64 Remove the formatter PCA for fax + wireless models (2 of 4) ...................................................................... 40
Figure 1-65 Remove the formatter PCA for fax + wireless models (3 of 4) ...................................................................... 41
Figure 1-66 Remove the formatter PCA for fax + wireless models (4 of 4) ...................................................................... 41
Figure 1-67 Remove the fax PCA (1 of 2) ........................................................................................................................... 42
Figure 1-68 Remove the fax PCA (2 of 2) ........................................................................................................................... 42
Figure 1-69 Remove the laser scanner assembly and cable (1 of 2) ................................................................................ 43
Figure 1-70 Remove the laser scanner assembly and cable (2 of 2) ................................................................................ 44
Figure 1-71 Remove the motor PCA (1 of 2) ...................................................................................................................... 45
Figure 1-72 Remove the motor PCA (2 of 2) ...................................................................................................................... 46
Figure 1-73 Remove the motor PCA bracket ..................................................................................................................... 46
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Figure 1-74 Remove the motor, simple method (1 of 4) ................................................................................................... 47
Figure 1-75 Remove the motor, simple method (2 of 4) ................................................................................................... 47
Figure 1-76 Remove the motor, simple method (3 of 4) ................................................................................................... 48
Figure 1-77 Remove the motor, simple method (4 of 4) ................................................................................................... 48
Figure 1-78 Remove the motor, complex method (1 of 3) ................................................................................................ 49
Figure 1-79 Remove the motor, complex method (2 of 3) ................................................................................................ 49
Figure 1-80 Remove the motor, complex method (3 of 3) ................................................................................................ 50
Figure 1-81 Remove the engine controller PCA (1 of 12) .................................................................................................. 51
Figure 1-82 Remove the engine controller PCA (2 of 12) .................................................................................................. 52
Figure 1-83 Remove the engine controller PCA (3 of 12) .................................................................................................. 52
Figure 1-84 Remove the engine controller PCA (4 of 12) .................................................................................................. 53
Figure 1-85 Remove the engine controller PCA (5 of 12) .................................................................................................. 53
Figure 1-86 Remove the engine controller PCA (6 of 12) .................................................................................................. 54
Figure 1-87 Remove the engine controller PCA (7 of 12) .................................................................................................. 54
Figure 1-88 Remove the engine controller PCA (8 of 12) .................................................................................................. 55
Figure 1-89 Remove the engine controller PCA (9 of 12) .................................................................................................. 55
Figure 1-90 Remove the engine controller PCA (10 of 12) ................................................................................................ 56
Figure 1-91 Remove the engine controller PCA (11 of 12) ................................................................................................ 56
Figure 1-92 Remove the engine controller PCA (12 of 12) ................................................................................................ 57
Figure 1-93 Reinstall the engine controller PCA (1 of 4) ................................................................................................... 57
Figure 1-94 Reinstall the engine controller PCA (2 of 4) ................................................................................................... 58
Figure 1-95 Reinstall the engine controller PCA (3 of 4) ................................................................................................... 58
Figure 1-96 Reinstall the engine controller PCA (4 of 4) ................................................................................................... 59
Figure 1-97 Remove the fuser and delivery sensor PCA (1 of 4) ....................................................................................... 60
Figure 1-98 Remove the fuser and delivery sensor PCA (2 of 4) ....................................................................................... 61
Figure 1-99 Remove the fuser and delivery sensor PCA (3 of 4) ....................................................................................... 61
Figure 1-100 Remove the fuser and delivery sensor PCA (4 of 4) ..................................................................................... 62
Figure 1-101 Reinstall the fuser; correct wire harness installation ................................................................................. 62
Figure 1-102 Reinstall the fuser; incorrect wire harness installation .............................................................................. 63
Figure 1-103 Remove the pickup assembly and pickup sensor PCA (1 of 4) .................................................................... 64
Figure 1-104 Remove the pickup assembly and pickup sensor PCA (2 of 4) .................................................................... 65
Figure 1-105 Remove the pickup assembly and pickup sensor PCA (3 of 4) .................................................................... 65
Figure 1-106 Remove the pickup assembly and pickup sensor PCA (4 of 4) .................................................................... 66
Figure 1-107 Reinstall the pickup assembly; correct ground spring position (1 of 4) ..................................................... 66
Figure 1-108 Reinstall the pickup assembly; incorrect ground spring position (2 of 4) .................................................. 67
Figure 1-109 Reinstall the pickup assembly; lift plate in raised position (3 of 4) ............................................................ 68
Figure 1-110 Reinstall the pickup assembly; lift plate in lowered position (4 of 4) ......................................................... 68
Figure 1-111 Separate the scanner lid or document feeder from the scan base (1 of 2) ................................................. 69
Figure 1-112 Separate the scanner lid or document feeder from the scan base (2 of 2) ................................................. 70
Figure 1-113 Remove the scan bezel (1 of 2) .................................................................................................................... 71
Figure 1-114 Remove the scan bezel (2 of 2) .................................................................................................................... 72
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Figure 1-115 Remove the scan drive system .................................................................................................................... 73
Figure 1-116 Remove the scan FFC cable (1 of 3) .............................................................................................................. 74
Figure 1-117 Remove the scan FFC cable (2 of 3) .............................................................................................................. 75
Figure 1-118 Remove the scan FFC cable (3 of 3) .............................................................................................................. 75
Figure 1-119 Remove the scan motor (1 of 2) ................................................................................................................... 76
Figure 1-120 Remove the scan motor (2 of 2) ................................................................................................................... 77
Figure 1-121 Reinstall the scan motor .............................................................................................................................. 77
Figure 1-122 Remove the scanner spring assembly (1 of 2) ............................................................................................. 78
Figure 1-123 Remove the scanner spring assembly (2 of 2) ............................................................................................. 78
Figure 1-124 Reinstall the scanner spring assembly ........................................................................................................ 79
Figure 1-125 Remove the ADF top cover (1 of 2) ............................................................................................................... 80
Figure 1-126 Remove the ADF top cover (2 of 2) ............................................................................................................... 80
Figure 1-127 Remove the ADF core (1 of 2) ....................................................................................................................... 81
Figure 1-128 Remove the ADF core (2 of 2) ....................................................................................................................... 81
Figure 1-129 Remove the ADF separation pad assembly (1 of 3) ..................................................................................... 80
Figure 1-130 Remove the ADF separation pad assembly (2 of 3) ..................................................................................... 82
Figure 1-131 Remove the ADF separation pad assembly (3 of 3) ..................................................................................... 83
Figure 1-132 Reinstall the ADF separation pad assembly (1 of 5) .................................................................................... 83
Figure 1-133 Reinstall the ADF separation pad assembly (2 of 5) .................................................................................... 84
Figure 1-134 Reinstall the ADF separation pad assembly (3 of 5) .................................................................................... 84
Figure 1-135 Reinstall the ADF separation pad assembly (4 of 5) .................................................................................... 85
Figure 1-136 Reinstall the ADF separation pad assembly (5 of 5) .................................................................................... 85
Figure 1-137 Remove the ADF inner tray ........................................................................................................................... 86
Figure 1-138 Remove the ADF input guides and gear (1 of 3) .......................................................................................... 87
Figure 1-139 Remove the ADF input guides and gear (2 of 3) .......................................................................................... 87
Figure 1-140 Remove the ADF input guides and gear (3 of 3) .......................................................................................... 88
Figure 1-141 Remove the ADF pre-pickup arm assembly (1 of 2) .................................................................................... 89
Figure 1-142 Remove the ADF pre-pickup arm assembly (2 of 2) .................................................................................... 89
Figure 2-1 Covers and external components ..................................................................................................................... 96
Figure 2-2 Internal assemblies (1 of 3) .............................................................................................................................. 98
Figure 2-3 Internal assemblies (2 of 3) ............................................................................................................................ 100
Figure 2-4 Internal assemblies (3 of 3) ............................................................................................................................ 102
Figure 2-5 Scanner lid, base models ................................................................................................................................ 104
Figure 2-6 Scanner assembly, base models .................................................................................................................... 106
Figure 2-7 Scan drive system, all models ........................................................................................................................ 108
Figure 2-8 Scanner and document feeder assembly, fax models ................................................................................... 110
Figure 2-9 Scanner assembly, fax models ....................................................................................................................... 112
Figure 2-10 Document feeder assembly, fax models ..................................................................................................... 114
Figure 2-11 Document feeder top cover, fax models ...................................................................................................... 116
Figure 2-12 Document feeder core, fax models .............................................................................................................. 118
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Removal and replacement
●
Removal and replacement strategy
●
Service approach
●
Removal and replacement procedures
1
Removal and replacement strategy
Introduction
This chapter describes the removal and replacement of field-replaceable units (FRUs) only.
Replacing FRUs is generally the reverse of removal. Notes are included to provide directions for difficult or
critical replacement procedures.
HP does not support repairing individual subassemblies or troubleshooting to the component level.
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: 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.
CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation.
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.
Required tools
●
#2 Phillips screwdriver with a magnetic tip and a 152-mm (6-inch) shaft length
●
Small flat-blade screwdriver
●
Torx® drivers, sizes T9 and T10
●
Needle-nose pliers
●
ESD strap (if one is available)
●
Penlight
CAUTION: Always use a Phillips screwdriver (callout 1). Do not use a pozidrive screwdriver (callout 2) or any
motorized screwdriver. These can damage screws or screw threads.
Figure 1-1 Screwdrivers
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CAUTION: Do not pull directly on the wires to disconnect them. Always 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 an 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.
Table 1-1 Types of screws
Illustration
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Description
Size
Part number
Use
Screw, pan head, silver
M3×6
0515-2908
Used to secure electrical
boards and ground wires
Screw, pan head, black
M3×8
0515-4681
Used to secure the left
cover
Screw, tapping, pan head,
black
M4×10
0515-4680
Used to secure the front
cover
Removal and replacement strategy
3
Service approach
Before performing service
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 and damage to the device can result. The
power must be on for certain functional checks during troubleshooting. However, the power supply should be
disconnected during parts removal.
●
Remove all media.
●
Place the product on an ESD mat (if available).
●
Remove the toner cartridge. See Toner cartridge on page 5.
●
Remove the input tray. See Input tray on page 6.
After performing service
●
Reinstall the input tray.
●
Load paper in the tray.
●
Reinstall the toner cartridge.
●
Plug in the power cable and turn on the product.
Parts removal order
If multiple components must be removed to gain access to an assembly, the first step of the removal
procedure lists all of the components that must be removed to gain access to that assembly. Use these lists
to determine which parts must be removed before removing other parts.
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Removal and replacement procedures
Customer-replaceable parts
Toner cartridge
1.
Open the scanner assembly.
Figure 1-2 Remove the toner cartridge (1 of 3)
2.
Open the cartridge door.
Figure 1-3 Remove the toner cartridge (2 of 3)
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Removal and replacement procedures
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3.
Remove the toner cartridge.
Figure 1-4 Remove the toner cartridge (3 of 3)
Input tray
▲
Pull the input tray straight out to remove it.
Figure 1-5 Remove the input tray
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Short-media extender
▲
Pull the short media extender straight out to remove it.
Figure 1-6 Remove the short-media extender
Pickup roller
CAUTION: Do not touch the sponge portion of the roller. Skin oils can cause paper handling problems.
1.
Open the scanner assembly.
Figure 1-7 Remove the pickup roller (1 of 5)
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Removal and replacement procedures
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2.
Open the cartridge door.
Figure 1-8 Remove the pickup roller (2 of 5)
3.
Remove the toner cartridge.
Figure 1-9 Remove the pickup roller (3 of 5)
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4.
Release two tabs.
Figure 1-10 Remove the pickup roller (4 of 5)
5.
Rotate the roller away from the product to remove it.
Figure 1-11 Remove the pickup roller (5 of 5)
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9
Separation pad
CAUTION: Do not touch the sponge portion of the pad. Skin oils can cause paper handling problems.
1.
Rotate the product on to the left side.
Figure 1-12 Remove the separation pad (1 of 2)
2.
On the bottom of the product, remove two screws (callout 1), and then remove the separation pad
(callout 2).
Figure 1-13 Remove the separation pad (2 of 2)
2
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Handset (M128fp model only)
1.
Disconnect the phone cable from the bottom fax port.
Figure 1-14 Remove the handset (1 of 2)
2.
Open the scanner assembly, and then lift the handset platform straight up to remove it.
Figure 1-15 Remove the handset (2 of 2)
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Covers and external components
Paper-delivery tray (output bin extension)
▲
Slide the paper-delivery tray to one side, and carefully flex it to release two tabs. Remove the paperdelivery tray.
Figure 1-16 Remove the paper-delivery tray
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Left cover
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
Remove the left cover
1.
On the rear of the product, remove one screw (callout 1).
Figure 1-17 Remove the left cover (1 of 2)
1
2.
Rotate the product onto the right side. On the bottom of the product, release one tab (callout 1), and
remove the left cover.
Figure 1-18 Remove the left cover (2 of 2)
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Removal and replacement procedures
13
Scanner assembly
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
Remove the scanner assembly
NOTE: The M127fw and M128fw models are shown in the following photos. Other models look slightly
different, but the procedure is the same. For photos that show the differences, see Left-side PCAs
on page 33.
1.
Disconnect the scanner FFC (callout 1).
M127 and M128 models only: Disconnect one wire harness connector (callout 2), and remove it from
the cable guide (callout 3).
Figure 1-19 Remove the scanner assembly (1 of 4)
3
2
1
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2.
Support the scanner assembly, release one tab (callout 1), and then remove the scanner support
(callout 2).
CAUTION: The scanner assembly is not captive and can easily be separated from the product base if it
is opened too far.
Figure 1-20 Remove the scanner assembly (2 of 4)
1
2
3.
Carefully feed the FFC through the slot in the chassis (callout 1).
M127 and M128 models only: Remove the document-feeder grounding-cable screw (callout 2).
Figure 1-21 Remove the scanner assembly (3 of 4)
2
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Removal and replacement procedures
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4.
Lift the scanner assembly up and off of the product base.
Figure 1-22 Remove the scanner assembly (4 of 4)
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Cartridge door
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
Remove the cartridge door
1.
Open the cartridge door. Use a small flat-blade screwdriver to release the tab on the support arm on the
right.
Figure 1-23 Remove the cartridge door (1 of 3)
2.
Release the two hinges by pulling outward on the supports.
Figure 1-24 Remove the cartridge door (2 of 3)
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Removal and replacement procedures
17
3.
Remove the cartridge door.
Figure 1-25 Remove the cartridge door (3 of 3)
18
Chapter 1 Removal and replacement
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Front cover and control-panel assembly
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
Remove the front cover
1.
Disconnect the control-panel FFC from the top of the formatter PCA (callout 1), and unwind it from the
cable guides (callout 2).
Figure 1-26 Remove the front cover (1 of 5)
1
2
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Removal and replacement procedures
19
2.
On the top of the product, remove two black screws (callout 1) and one silver grounding screw (callout
2).
Figure 1-27 Remove the front cover (2 of 5)
1
3.
2
On the bottom of the product, use a flat-blade screwdriver to release two tabs (callout 1).
Figure 1-28 Remove the front cover (3 of 5)
1
20
Chapter 1 Removal and replacement
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4.
Release one tab (callout 1), and then release one boss (callout 2).
Figure 1-29 Remove the front cover (4 of 5)
2
5.
1
Remove the front cover.
NOTE: The control panel is still attached to the front cover at this point.
Figure 1-30 Remove the front cover (5 of 5)
Reinstallation tip
cover.
ENWW
For easier reinstallation, fully extend the control panel before reinstalling the front
Removal and replacement procedures
21
Remove the control-panel assembly
Follow this procedure to separate the control-panel assembly from the front cover.
1.
Unthread the control-panel FFC from the guide (callout 1), and loosen the adhesive along the length of
the FFC (callout 2).
Figure 1-31 Remove the control-panel assembly (1 of 4)
2
1
2.
Rotate the control panel to the fully open position.
3.
Simultaneously push down on the control-panel support arm and push up on the spring assembly. Push
the support arm through the opening.
NOTE: This photo shows a white spring assembly. However, the spring assembly is actually black.
Figure 1-32 Remove the control-panel assembly (2 of 4)
22
Chapter 1 Removal and replacement
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4.
Slide the control panel toward the right to release it, and then pull the FFC and grounding cable through
the opening.
Figure 1-33 Remove the control-panel assembly (3 of 4)
5.
Push up on the support arm to remove it from the control panel.
NOTE: If you are replacing the control panel, reinstall this support arm onto the new control panel.
Figure 1-34 Remove the control-panel assembly (4 of 4)
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Removal and replacement procedures
23
Right cover
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
Remove the right cover
1.
Remove one screw (callout 1).
Figure 1-35 Remove the right cover (1 of 5)
1
24
Chapter 1 Removal and replacement
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2.
Release one tab at the back of the product (callout 1).
Figure 1-36 Remove the right cover (2 of 5)
1
3.
Rotate the product onto the front side, and release one tab at the bottom of the product (callout 1).
Figure 1-37 Remove the right cover (3 of 5)
1
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Removal and replacement procedures
25
4.
Release a second tab on the bottom of the product.
Figure 1-38 Remove the right cover (4 of 5)
1
5.
Remove the cover.
Figure 1-39 Remove the right cover (5 of 5)
1
26
Chapter 1 Removal and replacement
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Top cover and image scanner lock
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
Remove the top cover and image scanner lock
1.
Remove four black screws (callout 1) and two dull, silver screws (callout 2), and remove the top cover
(callout 3).
Figure 1-40 Remove the top cover
3
2
1
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Removal and replacement procedures
27
2.
To remove the image scanner lock, remove one screw (callout 1) and remove the lock mechanism
(callout 2).
Figure 1-41 Remove the image scanner lock
1
2
Reinstallation tip When reinstalling the top cover, insert the two tabs (callout 1) at the front of the top
cover into the slots (callout 2).
Figure 1-42 Reinstall the top cover
1
2
28
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Rear cover
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
●
Top cover. See Top cover and image scanner lock on page 27.
Remove the rear cover
▲
Pull the rear cover straight off to remove it (callout 1).
Figure 1-43 Remove the rear cover
1
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Removal and replacement procedures
29
Reinstall the rear cover
Reinstallation tip When reinstalling the rear cover, insert the two hooks (callout 1) into the slots at the
bottom of the product (callout 2).
Figure 1-44 Reinstall the rear cover
2
1
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Main assemblies
Transfer roller
CAUTION: Do not touch the sponge portion of the roller. Skin oils can cause print quality problems.
1.
Open the scanner assembly.
Figure 1-45 Remove the transfer roller (1 of 4)
2.
Open the cartridge door.
Figure 1-46 Remove the transfer roller (2 of 4)
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Removal and replacement procedures
31
3.
Remove the toner cartridge.
Figure 1-47 Remove the transfer roller (3 of 4)
4.
Release two tabs (callout 1), and then remove the transfer roller (callout 2).
Figure 1-48 Remove the transfer roller (4 of 4)
2
1
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Left-side PCAs
The configuration of PCAs on the left side of the product varies by model. Most of the photos in the
component removal procedures in this guide are from the M127fw model. Other models have a slightly
different appearance.
The following photos depict the left-side PCA layouts for the four possible configurations.
Figure 1-49 PCA layout for the base models (M125a, M125r, M125ra)
1
1
Formatter PCA
Figure 1-50 PCA layout for the base + wireless models (M125nw, M126nw, M125rnw)
2
1
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1
Formatter PCA
2
Wireless PCA
Removal and replacement procedures
33
Figure 1-51 PCA layout for the fax models (M127fn, M128fn, M128fp)
1
2
1
Formatter PCA
2
Fax PCA
Figure 1-52 PCA layout for the fax + wireless models (M127fw, M128fw)
3
1
2
34
1
Formatter PCA
2
Fax PCA
3
Wireless PCA
Chapter 1 Removal and replacement
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Wireless PCA (wireless models only)
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
Remove the wireless PCA
1.
Disconnect the control-panel FFC from the top of the formatter PCA (callout 1), and unwind it from the
cable guides (callout 2).
Figure 1-53 Remove the wireless PCA (1 of 3)
1
2
2.
Remove two screws (callout 1), and remove the wireless PCA and holder (callout 2).
Figure 1-54 Remove the wireless PCA (2 of 3)
2
1
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Removal and replacement procedures
35
3.
Separate the PCA from the holder by releasing the tab at the top of the PCA and pulling the PCA up.
Figure 1-55 Remove the wireless PCA (3 of 3)
Reinstallation tip When reinstalling the wireless PCA, insert the hook on the back of the holder (callout 1)
into the square slot on the sheet-metal frame that is behind the formatter (callout 2).
Figure 1-56 Reinstall the wireless PCA
2
1
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Formatter PCA
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
Remove the formatter PCA for base models (M125a, M125r, M125ra)
1.
Disconnect the black scanner FFC from the bottom of the formatter (callout 1). Disconnect the white
control-panel FFC from the top of the formatter (callout 2), and unwind it from the cable guide (callout
3).
Figure 1-57 Remove the formatter PCA for base models (1 of 2)
2
1
2.
3
Disconnect three connectors (callout 1). Remove three screws (callout 2). Remove the formatter PCA
(callout 3).
Figure 1-58 Remove the formatter PCA for base models (2 of 2)
3
2
1
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Removal and replacement procedures
37
Remove the formatter PCA for base + wireless models (M125nw, M126nw, M125rnw)
1.
Disconnect the black scanner FFC from the bottom of the formatter (callout 1). Disconnect the white
control-panel FFC from the top of the formatter (callout 2), and unwind it from the cable guide (callout
3). Remove two screws on the wireless PCA holder (callout 4), and remove the wireless PCA and holder
(callout 5).
Figure 1-59 Remove the formatter PCA for base + wireless models (1 of 2)
2
5
4
1
2.
3
Disconnect three connectors (callout 1). Remove three screws (callout 2). Remove the formatter PCA
(callout 3).
Figure 1-60 Remove the formatter PCA for base + wireless models (2 of 2)
3
2
1
Remove the formatter PCA for fax models (M127fn, M128fn, M128fp)
1.
38
Disconnect the black scanner FFC from the bottom of the formatter (callout 1). Disconnect the red and
black document-feeder connector at the top of the formatter (callout 2). Disconnect the white control-
Chapter 1 Removal and replacement
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panel FFC from the top of the formatter (callout 3), and unwind it from the cable guide (callout 4).
Remove one screw on the support bracket (callout 5), and remove the support bracket (callout 6).
Figure 1-61 Remove the formatter PCA for fax models (1 of 2)
3
2
4
1
6
5
2.
Remove four screws (callout 1), and remove the formatter PCA (callout 2).
Figure 1-62 Remove the formatter PCA for fax models (2 of 2)
2
1
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Removal and replacement procedures
39
Remove the formatter PCA for fax + wireless models (M127fw, M128fw)
1.
Disconnect the black scanner FFC from the bottom of the formatter (callout 1). Disconnect the red and
black document-feeder connector at the top of the formatter (callout 2). Disconnect the white controlpanel FFC from the top of the formatter (callout 3), and unwind it from the cable guide (callout 4).
Figure 1-63 Remove the formatter PCA for fax + wireless models (1 of 4)
3
2
1
4
2.
Remove two screws (callout 1), and remove the wireless PCA and holder (callout 2).
Figure 1-64 Remove the formatter PCA for fax + wireless models (2 of 4)
2
1
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Chapter 1 Removal and replacement
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3.
Disconnect two connectors (callout 1). Disconnect the fax FFC (callout 2). Disconnect one FFC (callout 3).
Figure 1-65 Remove the formatter PCA for fax + wireless models (3 of 4)
3
1
2
4.
Remove three screws (callout 1). Remove the formatter PCA (callout 2).
Figure 1-66 Remove the formatter PCA for fax + wireless models (4 of 4)
2
1
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Removal and replacement procedures
41
Fax PCA (fax models only)
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
Remove the fax PCA
1.
Disconnect one connector (callout 1), and remove four screws (callout 2).
Figure 1-67 Remove the fax PCA (1 of 2)
2
2.
1
Pull down the rubber cap on the bottom fax port (callout 1). Remove the fax PCA (callout 2).
Figure 1-68 Remove the fax PCA (2 of 2)
1
42
Chapter 1 Removal and replacement
2
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Laser scanner assembly and cable
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
●
Top cover. See Top cover and image scanner lock on page 27.
●
Formatter PCA. See Formatter PCA on page 37.
Remove the laser scanner assembly and cable
1.
Remove four screws (callout 1), and lift the laser scanner cover (callout 2) up to remove it.
Figure 1-69 Remove the laser scanner assembly and cable (1 of 2)
1
2
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Removal and replacement procedures
43
2.
To remove the laser scanner cable, disconnect the laser scanner FFC (callout 1) and unthread it from the
guide on the product left side to remove it.
To remove the laser scanner, remove four screws (callout 2), disconnect one connector (callout 3), and
remove the laser scanner (callout 4).
Figure 1-70 Remove the laser scanner assembly and cable (2 of 2)
1
2
3
4
44
Chapter 1 Removal and replacement
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Motor PCA and motor
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
●
Top cover. See Top cover and image scanner lock on page 27.
●
Formatter PCA. See Formatter PCA on page 37.
●
Laser scanner. See Laser scanner assembly and cable on page 43.
Remove the motor PCA and motor
1.
Disconnect the connector at the front of the motor PCA (callout 1). Release two tabs (callout 2), and
slide the motor PCA (callout 3) forward to remove it from the bracket.
Figure 1-71 Remove the motor PCA (1 of 2)
2
3
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1
Removal and replacement procedures
45
2.
Pull the FFC out from under the motor PCA bracket (callout 1), and loosen the adhesive to remove the
FFC (callout 2).
Figure 1-72 Remove the motor PCA (2 of 2)
1
2
3.
Remove one screw (callout 1), and pull the motor PCA bracket up to remove it (callout 2).
Figure 1-73 Remove the motor PCA bracket
1
2
4.
There are two methods for removing the motor. Try the simple method first, which requires a Phillips
head screwdriver that has a narrow shaft. If the simple method does not work or if you do not have the
correct tool, use the complex method.
NOTE: Both methods are easier to perform if you rotate the product so that the right side is facing up.
46
Chapter 1 Removal and replacement
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Remove the motor, simple method
a.
Remove two screws (callout 1).
Figure 1-74 Remove the motor, simple method (1 of 4)
1
b.
Carefully lift up the gear cover, and lift up the gear that is exposed (callout 1). The gear needs to
clear the motor drive shaft (callout 2).
Figure 1-75 Remove the motor, simple method (2 of 4)
1
2
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Removal and replacement procedures
47
c.
Hold the gear up while you remove the screw with washer that is closest to the gear.
Figure 1-76 Remove the motor, simple method (3 of 4)
d.
Support the motor while you remove the second screw with washer (callout 1), and then pull the
motor down to remove it (callout 2).
Figure 1-77 Remove the motor, simple method (4 of 4)
1
2
48
Chapter 1 Removal and replacement
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Remove the motor, complex method
a.
Remove four screws (callout 1), and remove the gear cover (callout 2).
Figure 1-78 Remove the motor, complex method (1 of 3)
2
1
b.
Remove two gears (callout 1) by pulling them straight up.
CAUTION:
The gears are greasy.
Figure 1-79 Remove the motor, complex method (2 of 3)
1
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Removal and replacement procedures
49
c.
Support the motor while you remove two screws with washers (callout 1), and pull the motor
down to remove it (callout 2).
Figure 1-80 Remove the motor, complex method (3 of 3)
1
2
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Chapter 1 Removal and replacement
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Engine controller PCA
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
●
Top cover. See Top cover and image scanner lock on page 27.
●
Rear cover. See Rear cover on page 29.
●
Left-side PCAs. See Left-side PCAs on page 33.
Remove the engine controller PCA
1.
Remove the formatter cover. Release one tab (callout 1) and slide the formatter cover up to remove it
(callout 2).
Figure 1-81 Remove the engine controller PCA (1 of 12)
1
2
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Removal and replacement procedures
51
2.
On the front of the product, remove two screws (callout 1).
Figure 1-82 Remove the engine controller PCA (2 of 12)
1
3.
On the left side of the product, remove one screw with washer (callout 1), two black screws (callout 2),
and then remove the formatter stay (callout 3).
Figure 1-83 Remove the engine controller PCA (3 of 12)
2
1
3
52
Chapter 1 Removal and replacement
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4.
Remove the black, plastic support bracket (callout 1).
Figure 1-84 Remove the engine controller PCA (4 of 12)
1
5.
On the rear of the product, remove three screws (callout 1), and then remove the sheet-metal bracket
(callout 2).
Figure 1-85 Remove the engine controller PCA (5 of 12)
2
1
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Removal and replacement procedures
53
6.
Release the cable (callout 1) from the cable guide (callout 2). Disconnect one connector (callout 3).
Release the cable (callout 1) from the cable guide (callout 4).
Figure 1-86 Remove the engine controller PCA (6 of 12)
4
3
1
7.
2
On the left side of the product, disconnect one connector (callout 1). Release the cable from the cable
guide (callout 2). Disconnect three connectors (callout 3). Release the cables from the guides.
Figure 1-87 Remove the engine controller PCA (7 of 12)
2
1
3
54
Chapter 1 Removal and replacement
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8.
Unhook the end of the wire spring (callout 1) from the hole (callout 2) on the metal plate. Remove the
spring from the pink wire.
Figure 1-88 Remove the engine controller PCA (8 of 12)
1
2
9.
Disconnect one connector (callout 1) and two FFCs (callout 2).
Figure 1-89 Remove the engine controller PCA (9 of 12)
2
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1
Removal and replacement procedures
55
10. On the back of the product, remove the silver “star” screw (callout 1), and remove the black screw
below the power connection (callout 2).
Figure 1-90 Remove the engine controller PCA (10 of 12)
1
2
11. Remove three grounding screws (callout 1) from the engine controller PCA, and then remove the engine
controller PCA (callout 2).
Figure 1-91 Remove the engine controller PCA (11 of 12)
2
1
56
Chapter 1 Removal and replacement
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12. Release one tab (callout 1), and slide the cable guide up to remove it (callout 2).
Figure 1-92 Remove the engine controller PCA (12 of 12)
1
2
Reinstall the engine controller PCA
NOTE:
1.
Follow these steps to correctly install the transfer-wire harness.
Set the ground spring (callout 1) on the transfer-wire harness (callout 2).
Figure 1-93 Reinstall the engine controller PCA (1 of 4)
1
2
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Removal and replacement procedures
57
2.
Position the transfer-wire harness (callout 1) in the guide (callout 2).
Figure 1-94 Reinstall the engine controller PCA (2 of 4)
2
1
3.
Connect one connector (callout 1).
Figure 1-95 Reinstall the engine controller PCA (3 of 4)
1
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Chapter 1 Removal and replacement
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4.
Position the transfer-wire harness (callout 1) in the guides (callout 2).
Figure 1-96 Reinstall the engine controller PCA (4 of 4)
2
1
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Removal and replacement procedures
59
Fuser and delivery sensor PCA
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
●
Top cover. See Top cover and image scanner lock on page 27.
●
Rear cover. See Rear cover on page 29.
●
Left-side PCAs. See Left-side PCAs on page 33.
Remove the fuser and delivery sensor PCA
1.
Follow the procedure to remove the engine controller PCA through step 9. See Engine controller PCA
on page 51.
2.
Release the cables (callout 1) from the guides (callout 2).
Figure 1-97 Remove the fuser and delivery sensor PCA (1 of 4)
2
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Chapter 1 Removal and replacement
1
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3.
Release one tab (callout 1), and remove the cable guide (callout 2).
Figure 1-98 Remove the fuser and delivery sensor PCA (2 of 4)
2
1
4.
Remove three screws (callout 1), and then remove the fuser (callout 2).
Figure 1-99 Remove the fuser and delivery sensor PCA (3 of 4)
1
2
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Removal and replacement procedures
61
5.
To separate the delivery sensor PCA from the fuser, disconnect one connector (callout 1) and remove
the delivery sensor PCA (callout 2).
Figure 1-100 Remove the fuser and delivery sensor PCA (4 of 4)
1
2
Reinstall the fuser
▲
To avoid damage to wire harnesses, make sure that they are correctly installed in the guides when the
fuser is reinstalled.
Figure 1-101 Reinstall the fuser; correct wire harness installation
62
Chapter 1 Removal and replacement
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Figure 1-102 Reinstall the fuser; incorrect wire harness installation
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Removal and replacement procedures
63
Pickup assembly and pickup sensor PCA
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
●
Cartridge door. See Cartridge door on page 17.
●
Front cover. See Front cover and control-panel assembly on page 19.
●
Right cover. See Right cover on page 24.
●
Top cover. See Top cover and image scanner lock on page 27.
●
Rear cover. See Rear cover on page 29.
●
Left-side PCAs. See Left-side PCAs on page 33.
Remove the pickup assembly and pickup sensor PCA
1.
Follow the procedure to remove the engine controller PCA through step 9. See Engine controller PCA
on page 51.
2.
Release the cables (callout 1) from the guides (callout 2).
Figure 1-103 Remove the pickup assembly and pickup sensor PCA (1 of 4)
2
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Chapter 1 Removal and replacement
1
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3.
On the right side of the product, release the tab (callout 1) on the white bushing, rotate the bushing
clockwise, and remove it
Figure 1-104 Remove the pickup assembly and pickup sensor PCA (2 of 4)
1
4.
Remove three black screws (callout 1) and four silver screws (callout 2). Remove the pickup assembly.
CAUTION: Do not let the grounding spring drop.
Figure 1-105 Remove the pickup assembly and pickup sensor PCA (3 of 4)
1
2
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Removal and replacement procedures
65
5.
To remove the pickup sensor PCA, release the wire harness (callout 1) from the cable guide (callout 2),
and remove the pickup sensor PCA (callout 3).
Figure 1-106 Remove the pickup assembly and pickup sensor PCA (4 of 4)
1
2
3
Reinstall tips for the grounding spring and lifting plate
●
Make sure that the pickup assembly ground spring is correctly positioned when the assembly is
reinstalled.
Figure 1-107 Reinstall the pickup assembly; correct ground spring position (1 of 4)
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Chapter 1 Removal and replacement
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Figure 1-108 Reinstall the pickup assembly; incorrect ground spring position (2 of 4)
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Removal and replacement procedures
67
●
Push down the lift plate before installing the pickup assembly.
TIP: Reach in from the front of the product to push and hold the plate down as the pickup unit is
installed.
Figure 1-109 Reinstall the pickup assembly; lift plate in raised position (3 of 4)
Figure 1-110 Reinstall the pickup assembly; lift plate in lowered position (4 of 4)
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Scanner and document feeder components
Before proceeding, remove the following components:
●
Paper-delivery tray. See Paper-delivery tray (output bin extension) on page 12.
●
Left cover. See Left cover on page 13.
●
Scanner assembly. See Scanner assembly on page 14.
Separate the scanner lid or document feeder from the scan base
NOTE: The photos in the following procedure are of a model that has a document feeder. Other models
might look slightly different, but the procedure is the same.
1.
Document feeder models only: Pull the document-feeder cable through the opening.
Figure 1-111 Separate the scanner lid or document feeder from the scan base (1 of 2)
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Removal and replacement procedures
69
2.
Open the scanner lid or document feeder, and tilt it slightly forward. Push down and back on each of the
two hinges to release them.
NOTE: This step requires some force, but it is easier to first tilt the scanner lid or document feeder
forward.
Figure 1-112 Separate the scanner lid or document feeder from the scan base (2 of 2)
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Scanner components
Before proceeding, separate the scanner lid or document feeder from the scan base. See Separate the
scanner lid or document feeder from the scan base on page 69.
Scan bezel
NOTE: The photos in the following procedure are of a model that has a document feeder. Other models
might look slightly different, but the procedure is the same.
CAUTION: Perform these procedures in a dust-free environment.
CAUTION: The components inside of the scan assembly are not captive when the bezel is removed.
1.
Place the scan assembly glass-side-down, and remove three Torx T9 screws (callout 1).
Figure 1-113 Remove the scan bezel (1 of 2)
1
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Removal and replacement procedures
71
2.
Turn the scan assembly over, and remove five Torx T10 screws (callout 1), and lift the scan bezel
(callout 2) off the scan assembly.
Figure 1-114 Remove the scan bezel (2 of 2)
2
1
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Scan drive system
Before proceeding, remove the following components:
●
Scan bezel. See Scan bezel on page 71.
NOTE: The photos in the following procedure are of a model that has a document feeder. Other models
might look slightly different, but the procedure is the same.
CAUTION: Perform these procedures in a dust-free environment.
CAUTION: The components inside of the scan assembly are not captive when the bezel is removed.
Remove the scan drive system
1.
Lift the scan drive system out of the scanner, and turn it over.
CAUTION: The scan drive system is still connected to the scanner assembly by the FFC.
2.
Disconnect the two FFC connectors (callout 1) and unthread the FFC from the guide (callout 2), and then
remove the scan drive system.
Figure 1-115 Remove the scan drive system
2
1
ENWW
Removal and replacement procedures
73
Scan FFC cable
Before proceeding, remove the following components:
●
Scan bezel. See Scan bezel on page 71.
●
Scan drive system. See Scan drive system on page 73.
NOTE: The photos in the following procedure are of a model that has a document feeder. Other models
might look slightly different, but the procedure is the same.
CAUTION: Perform these procedures in a dust-free environment.
CAUTION: The components inside of the scan assembly are not captive when the bezel is removed.
Remove the scan FFC cable
1.
From the bottom of the scan assembly, push the tab on the FFC cover through the opening.
Figure 1-116 Remove the scan FFC cable (1 of 3)
74
Chapter 1 Removal and replacement
ENWW
2.
Pull the FFC cover off of the FFC.
Figure 1-117 Remove the scan FFC cable (2 of 3)
3.
Unthread the FFC through the ferrite and the guides (callout 1), and then loosen the adhesive to remove
the FFC (callout 2).
Figure 1-118 Remove the scan FFC cable (3 of 3)
1
ENWW
2
Removal and replacement procedures
75
Scan motor
Before proceeding, remove the following components:
●
Scan bezel. See Scan bezel on page 71.
●
Scan drive system. See Scan drive system on page 73.
CAUTION: Perform these procedures in a dust-free environment.
Remove the scan motor
1.
On the bottom of the scan drive system, remove one Torx T10 screw (callout 1), and lift off the metal
bracket (callout 2).
Figure 1-119 Remove the scan motor (1 of 2)
2
1
76
Chapter 1 Removal and replacement
ENWW
2.
Pull the motor straight up to remove it (callout 1).
Figure 1-120 Remove the scan motor (2 of 2)
1
Reinstallation tip When reinstalling the scan motor, position the metal bracket so the tab is visible in the
notch on the opposite side of the scan drive system.
Figure 1-121 Reinstall the scan motor
ENWW
Removal and replacement procedures
77
Scanner spring assembly
Before proceeding, remove the following components:
●
Scan bezel. See Scan bezel on page 71.
●
Scan drive system. See Scan drive system on page 73.
CAUTION: Perform these procedures in a dust-free environment.
Remove the scanner spring assembly
1.
Release one tab (callout 1).
Figure 1-122 Remove the scanner spring assembly (1 of 2)
1
2.
Pivot the spring assembly away from the scan drive chassis.
Figure 1-123 Remove the scanner spring assembly (2 of 2)
78
Chapter 1 Removal and replacement
ENWW
Reinstallation tip When reinstalling the scanner spring assembly, position the spring at each end so that
the short wire rests in the notch on the bottom of the scan drive chassis.
Figure 1-124 Reinstall the scanner spring assembly
ENWW
Removal and replacement procedures
79
Document feeder components
Before proceeding, separate the scanner lid or document feeder from the scan base. See Separate the
scanner lid or document feeder from the scan base on page 69.
Document feeder (ADF) top cover
1.
Open the ADF top cover. Use a small flat blade screwdriver to release one hinge pin (callout 1), and then
fully open the ADF cover.
Figure 1-125 Remove the ADF top cover (1 of 2)
1
2.
Slide the cover toward the rear of the ADF to release the rear hinge pins, and then lift up to remove the
cover.
Figure 1-126 Remove the ADF top cover (2 of 2)
80
Chapter 1 Removal and replacement
ENWW
ADF core
Before proceeding, remove the following components:
●
ADF top cover. See Document feeder (ADF) top cover on page 80.
Remove the ADF core
1.
At the rear of the ADF core, carefully feed the wire harness (callout 1) through the slot in the guides
(callout 2).
Figure 1-127 Remove the ADF core (1 of 2)
1
2
2.
Open the ADF core, and then flex the chassis to release one hinge pin (callout 1). Lift the ADF core
(callout 2) straight up to remove it.
Figure 1-128 Remove the ADF core (2 of 2)
2
1
ENWW
Removal and replacement procedures
81
ADF separation pad
Remove the ADF separation pad
1.
Open the ADF top cover. Use a small flat blade screwdriver to release one hinge pin (callout 1), and then
fully open the ADF cover.
Figure 1-129 Remove the ADF separation pad assembly (1 of 3)
1
2.
Push down on the edges of the assembly (callout 1), and then move it toward the right side of the
product (callout 2).
Figure 1-130 Remove the ADF separation pad assembly (2 of 3)
1
1
2
82
Chapter 1 Removal and replacement
ENWW
3.
Remove the assembly.
Figure 1-131 Remove the ADF separation pad assembly (3 of 3)
Reinstall the ADF separation pad assembly
1.
Place the base of the spring (callout 1) on the pedestal (callout 2).
Figure 1-132 Reinstall the ADF separation pad assembly (1 of 5)
2
1
ENWW
Removal and replacement procedures
83
2.
Place the assembly hinge pins in the slots in the ADF core.
Figure 1-133 Reinstall the ADF separation pad assembly (2 of 5)
3.
Slightly slide the assembly down and into the slots in the product to engage the hinge pins.
Figure 1-134 Reinstall the ADF separation pad assembly (3 of 5)
84
Chapter 1 Removal and replacement
ENWW
4.
Locate the upper locking pins.
NOTE: When the assembly is correctly installed, these pins are engaged in a slot in the ADF core, and
the spring underneath the assembly keeps the assembly in the raised position.
Figure 1-135 Reinstall the ADF separation pad assembly (4 of 5)
5.
Push down on the assembly until the pins reach the bottom of the slot in the ADF core, and then slightly
slide the assembly toward the left side of the product to engage the locking pins in the closed slot.
Release the assembly.
CAUTION: The pins on the assembly are fragile and can easily be broken off. Do not force the
assembly into place, or the pins might break.
TIP: Slightly tip the assembly and engage one pin, and then tip the assembly in the opposite direction
to engage the second pin.
Figure 1-136 Reinstall the ADF separation pad assembly (5 of 5)
ENWW
Removal and replacement procedures
85
ADF inner tray
Before proceeding, remove the following components:
●
ADF top cover. See Document feeder (ADF) top cover on page 80.
●
ADF core. See ADF core on page 81.
Remove the ADF inner tray
▲
Remove three Torx T10 screws (callout 1), and then lift the ADF inner tray off.
Figure 1-137 Remove the ADF inner tray
1
ADF input guides and gear
Before proceeding, remove the following components:
86
●
ADF top cover. See Document feeder (ADF) top cover on page 80.
●
ADF core. See ADF core on page 81.
●
ADF inner tray. ADF inner tray on page 86.
Chapter 1 Removal and replacement
ENWW
Remove the ADF input guides and gear
1.
Pull the input-guide gear (callout 1) straight up to remove it
Figure 1-138 Remove the ADF input guides and gear (1 of 3)
1
2.
Slide each ADF input guide all the way outward.
Figure 1-139 Remove the ADF input guides and gear (2 of 3)
ENWW
Removal and replacement procedures
87
3.
Push each guide down, rotate it, and push it through the slot to remove it.
Figure 1-140 Remove the ADF input guides and gear (3 of 3)
88
Chapter 1 Removal and replacement
ENWW
ADF pre-pickup arm assembly
Before proceeding, remove the following components:
●
ADF top cover. See Document feeder (ADF) top cover on page 80.
●
ADF core. See ADF core on page 81.
●
ADF inner tray. ADF inner tray on page 86.
Remove the ADF pre-pickup arm assembly
1.
Release two tabs (callout 1).
Figure 1-141 Remove the ADF pre-pickup arm assembly (1 of 2)
1
2.
Lift the pre-pickup arm assembly up to remove it.
Figure 1-142 Remove the ADF pre-pickup arm assembly (2 of 2)
ENWW
Removal and replacement procedures
89
90
Chapter 1 Removal and replacement
ENWW
2
ENWW
Parts and diagrams
●
Order parts by authorized service providers
●
How to use the parts lists and diagrams
●
Covers and external components
●
Internal assemblies
●
Scanner and document feeder components
●
Alphabetical parts list
●
Numerical parts list
91
Order parts by authorized service providers
Order replacement parts
Table 2-1 Order parts, accessories, and supplies
Order supplies and paper
www.hp.com/go/suresupply
Order genuine HP parts or accessories
www.hp.com/buy/parts
Order through service or support providers
Contact an HP-authorized service or support provider.
Related documentation
Table 2-2 Related documentation
Item
Description
Part number
HP LaserJet Pro MFP M125, M126, M127, M128 User Guide
Product user guide (English)
CZ172-90910
HP LaserJet Pro MFP M125, M126, M127, M128 Repair Manual
English repair manual (this
manual)
CZ183-90905
HP LaserJet Pro MFP M125, M126, M127, M128 Troubleshooting
Manual
English troubleshooting
manual
CZ183-90907
HP LaserJet Pro MFP M125, M126, M127, M128 Removal and
Troubleshooting Manual
Simplified Chinese removal and
troubleshooting manual
CZ183-90906
Supplies part numbers
Table 2-3 Supplies part numbers
92
Item
Description
Part number
HP 83A Toner Cartridge
Replacement toner cartridge
CF283A
HP 88A Toner Cartridge
Replacement toner cartridge for China and
India only
CC388A
Chapter 2 Parts and diagrams
ENWW
Customer replaceable units (CRU) kit part numbers
Table 2-4 Customer replaceable units (CRU) kit part numbers
Item
Description
Part number
Kit, pickup roller
Pickup roller
CZ172-65001
Instruction sheet
Kit, separation pad
Separation pad
CZ172-65010
Instruction sheet
Kit, paper pickup tray
Paper pickup tray
CZ172-65011
Instruction sheet
Kit, short-media extender tool
Short-media extender tool
CZ172-65012
Instruction sheet
Kit, China handset
Handset
CZ185-65001
Instruction sheet
ENWW
Order parts by authorized service providers
93
Whole-unit replacement part numbers
Table 2-5 Whole-unit replacement part numbers
Item
Description
Replacement part number
Exchange part number
M125a
110V Taiwan, Latin America (#BGJ)
CZ172-67901
CZ172-69001
220V Asia Pacific Countries/
Regions, Europe (#BBU)
CZ172-67902
CZ172-69002
M125nw
220V Europe (#B19)
CZ173-67901
CZ173-69001
M125r
220V Russia (#ACB)
CZ176-67901
CZ176-69001
M126nw
220V China, Indonesia (#AB2)
CZ175-67901
CZ175-69001
M127fn
110V Taiwan, Latin America, North
America (#BGJ)
CZ181-67901
CZ181-69001
220V Asia Pacific Countries/
Regions, Latin America (#BBU)
CZ181-67903
CZ181-69003
220V Europe (#B19)
CZ181-67904
CZ181-69004
110V North America (#BGJ)
CZ183-67901
CZ183-69001
220V Europe (#B19)
CZ183-67902
CZ183-69002
M128fn
220V China, Indonesia (#AB2)
CZ184-67901
CZ184-69001
M128fp
220V China, Indonesia (#AB2)
CZ185-67901
CZ185-69001
M128fw
220V China, Indonesia (#AB2)
CZ186-67901
CZ186-69001
M127fw
94
Chapter 2 Parts and diagrams
ENWW
How to use the parts lists and diagrams
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. Doing so will make sure that the part number selected is for the
correct 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.
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 replacement
part.
ENWW
How to use the parts lists and diagrams
95
Covers and external components
Figure 2-1 Covers and external components
8
A02
6
10
A04
A02
7
A03
A01
4
3
1
9
5
2
96
Chapter 2 Parts and diagrams
ENWW
Table 2-6 Covers and external components
ENWW
Ref
Description
Part number
Qty
1
Front cover assembly
RM2-5127-000CN
1
2
Paper pickup tray assembly
RM1-9958-000CN
1
3
Paper delivery tray assembly (output bin)
RM1-9905-000CN
1
4
Cover, top
RL1-3872-000CN
1
5
Cover, left
RL2-0395-000CN
1
6
Cover, right
RC3-5011-000CN
1
7
Image scanner lock assembly
RM1-9953-000CN
1
8
Door, cartridge
RC3-5015-000CN
1
9
Stopper, paper (short media extension)
RC3-4904-000CN
1
10
Cover, rear
RL1-3874-000CN
1
Handset (not shown)
CZ185-60101
1
Control panel, base models, no wireless (not shown)
CZ172-60110
1
Control panel, base plus wireless models (not shown)
CZ183-60101
1
Control panel, base model, no wireless, Russia (not shown)
CZ176-60101
1
Control panel, fax models, no wireless (not shown)
CZ181-60117
1
Control panel, fax plus wireless models (not shown)
CF484-60109
1
Assembly link for base models (hinge to support the scanner) (not
shown)
CE847-60110
1
Assembly link for fax models (hinge to support the scanner) (not
shown)
CE841-60119
1
Covers and external components
97
Internal assemblies
Internal assemblies (1 of 3)
Figure 2-2 Internal assemblies (1 of 3)
A12
1
4
(PS701,702)
(J552)
(J702)
A07
A12
(J101)
3
A10
A12
A13
A12
A04
A11
A12
A01
A05
A08
A06
A12
A09
2
A03
A12
A03
98
A02
Chapter 2 Parts and diagrams
A12
ENWW
Table 2-7 Internal assemblies (1 of 3)
ENWW
Ref
Description
Part number
Qty
1
Fuser paper delivery assembly (110 V)
RM2-5133-000CN
1
1
Fuser paper delivery assembly (220 V)
RM2-5134-000CN
1
2
Engine control PCA (110 V)
RM2-7381-000CN
1
2
Engine control PCA (220 V)
RM2-7382-000CN
1
2
Engine control PCA (220 V) for China/India
RM2-7378-000CN
1
3
Fuser film assembly (110 V)
RM1-9914-000CN
1
3
Fuser film assembly (220 V)
RM1-9915-000CN
1
4
Delivery sensor PCA assembly
RM2-7629-000CN
1
WiFi board (wireless PCA) (not shown)
1150-7953
1
Formatter PCA, base models, no wireless (not shown)
CZ172-60001
1
Formatter PCA, base plus wireless models (not shown)
CZ173-60001
1
Formatter PCA, fax models, no wireless (not shown)
CZ183-60001
1
Formatter PCA, fax plus wireless models (not shown)
CZ181-60001
1
Fax rubber cap (not shown)
CZ185-40001
1
Fax module, Asia countries/regions and U.S. (not shown)
CF206-60001
1
Fax module, Europe (not shown)
CF207-60001
1
Fax module, Brazil (not shown)
CF208-60001
1
Internal assemblies
99
Internal assemblies (2 of 3)
Figure 2-3 Internal assemblies (2 of 3)
220-240V
A18
A15
A07
110-127V
A18
A07
A11
A16
A06
1
A08
3
A03
A10
(PS751)
(J551)
A12
A05
A09
(J562)
A17
A13
A06
A01
4
A14
2
5
A04
A01
A02
100 Chapter 2 Parts and diagrams
ENWW
Table 2-8 Internal assemblies (2 of 3)
ENWW
Ref
Description
Part number
Qty
1
Pickup transfer frame assembly
RM2-5135-000CN
1
2
Roller, transfer
RM1-4023-000CN
1
3
Paper pickup sensor PCA assembly
RM2-7384-000CN
1
4
Roller, paper pickup
RL1-2593-000CN
1
5
Separation pad assembly
RM2-5131-000CN
1
Internal assemblies 101
Internal assemblies (3 of 3)
Figure 2-4 Internal assemblies (3 of 3)
A03
A01
A03
2
(J1)
(J571)
A02
A04
A02
A05
1
(J801)
(J542)
3
A06
(M1)
(J902)
102 Chapter 2 Parts and diagrams
4
ENWW
Table 2-9 Internal assemblies (3 of 3)
ENWW
Ref
Description
Part number
Qty
1
Laser scanner assembly
RM2-5126-000CN
1
2
Motor PCA assembly
RM2-7385-000CN
1
3
Cable, flat (laser scanner)
RM2-7377-000CN
1
4
Motor, DC 24 V
RL2-0396-000CN
1
Internal assemblies 103
Scanner and document feeder components
Scanner lid, base models
Figure 2-5 Scanner lid, base models
2
1
3
104 Chapter 2 Parts and diagrams
ENWW
Table 2-10 Scanner lid, base models
ENWW
Ref
Description
Part number
Qty
1
Scanner assembly (base models)
CZ172-60107
1
2
Scanner lid (base models)
CZ172-60102
1
3
Scanner lid assembly (base models)
CZ172-60101
1
Scanner lid assembly, bulk pack (base models) (not shown)
CZ172-60106
1
Scanner and document feeder components 105
Scanner assembly, base models
Figure 2-6 Scanner assembly, base models
5
4
6
7
3
2
1
106 Chapter 2 Parts and diagrams
ENWW
Table 2-11 Scanner assembly, base models
Ref
Description
Part number
Qty
3
SSA FFC Cable, 20 pin
CZ186-60104
1
4
Scan bezel assembly (base models)
CZ172-60103
1
6
Scan drive system assembly
CZ181-60104
1
7
Scanner base assembly (base models)
CZ172-60104
1
CAUTION: Replace the internal scanner assemblies only in a dust-free environment.
ENWW
Scanner and document feeder components 107
Scan drive system, all models
Figure 2-7 Scan drive system, all models
9
8
10
7
11
6
5
4
12
3
2
13
1
108 Chapter 2 Parts and diagrams
ENWW
Table 2-12 Scan drive system, all models
Ref
Description
Part number
Qty
7
Scan motor encoder assembly
CN503-60006
1
13
Scanner with spring assembly
CZ181-60113
1
CAUTION: Replace the internal scanner assemblies only in a dust-free environment.
ENWW
Scanner and document feeder components 109
Scanner and document feeder assembly, fax models
Figure 2-8 Scanner and document feeder assembly, fax models
2
1
3
110 Chapter 2 Parts and diagrams
ENWW
Table 2-13 Scanner and document feeder assembly, fax models
ENWW
Ref
Description
Part number
Qty
1
Scanner assembly (fax models)
CZ181-60112
1
2
Document feeder assembly
CZ181-60110
1
3
Scanner and document feeder assembly
CZ181-60101
1
Scanner and document feeder assembly, bulk pack (not shown)
CZ181-60111
1
Scanner and document feeder components 111
Scanner assembly, fax models
Figure 2-9 Scanner assembly, fax models
6
5
7
2
4
9
8
3
1
112 Chapter 2 Parts and diagrams
ENWW
Table 2-14 Scanner assembly, fax models
Ref
Description
Part number
Qty
2
SSA FFC Cable, 20-pin
CZ186-60104
1
5
Scan bezel (fax models)
CZ181-60102
1
7
Scan drive system assembly
CZ181-60104
1
9
Scanner base assembly (fax models)
CZ181-60103
1
CAUTION: Replace the internal scanner assemblies only in a dust-free environment.
ENWW
Scanner and document feeder components 113
Document feeder assembly, fax models
Figure 2-10 Document feeder assembly, fax models
3
2
1
114 Chapter 2 Parts and diagrams
ENWW
Table 2-15 Document feeder assembly, fax models
ENWW
Ref
Description
Part number
Qty
2
ADF core assembly
CZ181-60107
1
3
ADF top cover assembly
CZ181-60105
1
Scanner and document feeder components 115
Document feeder top cover, fax models
Figure 2-11 Document feeder top cover, fax models
4
3
2
5
1
6
116 Chapter 2 Parts and diagrams
ENWW
Table 2-16 Document feeder top cover, fax models
ENWW
Ref
Description
Part number
Qty
5
Pre-pick arm assembly
CB780-60032
1
6
Top cover with guide assembly
CZ181-60122
1
Scanner and document feeder components 117
Document feeder core, fax models
Figure 2-12 Document feeder core, fax models
2
1
118 Chapter 2 Parts and diagrams
ENWW
Table 2-17 Document feeder core, fax models
ENWW
Ref
Description
Part number
Qty
2
Separator pad assembly (document feeder)
CB780-60009
1
Scanner and document feeder components 119
Alphabetical parts list
Table 2-18 Alphabetical parts list
Description
Part number
Table and page
ADF core assembly
CZ181-60107
Document feeder assembly, fax
models on page 115
ADF top cover assembly
CZ181-60105
Document feeder assembly, fax
models on page 115
Assembly link for base models (hinge to support the scanner) (not
shown)
CE847-60110
Covers and external components
on page 97
Assembly link for fax models (hinge to support the scanner) (not
shown)
CE841-60119
Covers and external components
on page 97
Cable, flat (laser scanner)
RM2-7377-000CN
Internal assemblies (3 of 3)
on page 103
Control panel, base model, no wireless, Russia (not shown)
CZ176-60101
Covers and external components
on page 97
Control panel, base models, no wireless (not shown)
CZ172-60110
Covers and external components
on page 97
Control panel, base plus wireless models (not shown)
CZ183-60101
Covers and external components
on page 97
Control panel, fax models, no wireless (not shown)
CZ181-60117
Covers and external components
on page 97
Control panel, fax plus wireless models (not shown)
CF484-60109
Covers and external components
on page 97
Cover, left
RL2-0395-000CN
Covers and external components
on page 97
Cover, rear
RL1-3874-000CN
Covers and external components
on page 97
Cover, right
RC3-5011-000CN
Covers and external components
on page 97
Cover, top
RL1-3872-000CN
Covers and external components
on page 97
Delivery sensor PCA assembly
RM2-7629-000CN
Internal assemblies (1 of 3)
on page 99
Document feeder assembly
CZ181-60110
Scanner and document feeder
assembly, fax models
on page 111
Door, cartridge
RC3-5015-000CN
Covers and external components
on page 97
Engine control PCA (110 V)
RM2-7381-000CN
Internal assemblies (1 of 3)
on page 99
Engine control PCA (220 V)
RM2-7382-000CN
Internal assemblies (1 of 3)
on page 99
Engine control PCA (220 V) for China/India
RM2-7378-000CN
Internal assemblies (1 of 3)
on page 99
120 Chapter 2 Parts and diagrams
ENWW
Table 2-18 Alphabetical parts list (continued)
ENWW
Description
Part number
Table and page
Fax module, Asia countries/regions and U.S. (not shown)
CF206-60001
Internal assemblies (1 of 3)
on page 99
Fax module, Brazil (not shown)
CF208-60001
Internal assemblies (1 of 3)
on page 99
Fax module, Europe (not shown)
CF207-60001
Internal assemblies (1 of 3)
on page 99
Fax rubber cap (not shown)
CZ185-40001
Internal assemblies (1 of 3)
on page 99
Formatter PCA, base models, no wireless (not shown)
CZ172-60001
Internal assemblies (1 of 3)
on page 99
Formatter PCA, base plus wireless models (not shown)
CZ173-60001
Internal assemblies (1 of 3)
on page 99
Formatter PCA, fax models, no wireless (not shown)
CZ183-60001
Internal assemblies (1 of 3)
on page 99
Formatter PCA, fax plus wireless models (not shown)
CZ181-60001
Internal assemblies (1 of 3)
on page 99
Front cover assembly
RM2-5127-000CN
Covers and external components
on page 97
Fuser film assembly (110 V)
RM1-9914-000CN
Internal assemblies (1 of 3)
on page 99
Fuser film assembly (220 V)
RM1-9915-000CN
Internal assemblies (1 of 3)
on page 99
Fuser paper delivery assembly (110 V)
RM2-5133-000CN
Internal assemblies (1 of 3)
on page 99
Fuser paper delivery assembly (220 V)
RM2-5134-000CN
Internal assemblies (1 of 3)
on page 99
Handset (not shown)
CZ185-60101
Covers and external components
on page 97
Image scanner lock assembly
RM1-9953-000CN
Covers and external components
on page 97
Laser scanner assembly
RM2-5126-000CN
Internal assemblies (3 of 3)
on page 103
Motor PCA assembly
RM2-7385-000CN
Internal assemblies (3 of 3)
on page 103
Motor, DC 24 V
RL2-0396-000CN
Internal assemblies (3 of 3)
on page 103
Paper delivery tray assembly (output bin)
RM1-9905-000CN
Covers and external components
on page 97
Paper pickup sensor PCA assembly
RM2-7384-000CN
Internal assemblies (2 of 3)
on page 101
Paper pickup tray assembly
RM1-9958-000CN
Covers and external components
on page 97
Alphabetical parts list 121
Table 2-18 Alphabetical parts list (continued)
Description
Part number
Table and page
Pickup transfer frame assembly
RM2-5135-000CN
Internal assemblies (2 of 3)
on page 101
Pre-pick arm assembly
CB780-60032
Document feeder top cover, fax
models on page 117
Roller, paper pickup
RL1-2593-000CN
Internal assemblies (2 of 3)
on page 101
Roller, transfer
RM1-4023-000CN
Internal assemblies (2 of 3)
on page 101
Scan bezel (fax models)
CZ181-60102
Scanner assembly, fax models
on page 113
Scan bezel assembly (base models)
CZ172-60103
Scanner assembly, base models
on page 107
Scan drive system assembly
CZ181-60104
Scanner assembly, base models
on page 107
Scan drive system assembly
CZ181-60104
Scanner assembly, fax models
on page 113
Scan motor encoder assembly
CN503-60006
Scan drive system, all models
on page 109
Scanner and document feeder assembly
CZ181-60101
Scanner and document feeder
assembly, fax models
on page 111
Scanner and document feeder assembly, bulk pack (not shown)
CZ181-60111
Scanner and document feeder
assembly, fax models
on page 111
Scanner assembly (base models)
CZ172-60107
Scanner lid, base models
on page 105
Scanner assembly (fax models)
CZ181-60112
Scanner and document feeder
assembly, fax models
on page 111
Scanner base assembly (base models)
CZ172-60104
Scanner assembly, base models
on page 107
Scanner base assembly (fax models)
CZ181-60103
Scanner assembly, fax models
on page 113
Scanner lid (base models)
CZ172-60102
Scanner lid, base models
on page 105
Scanner lid assembly (base models)
CZ172-60101
Scanner lid, base models
on page 105
Scanner lid assembly, bulk pack (base models) (not shown)
CZ172-60106
Scanner lid, base models
on page 105
Scanner with spring assembly
CZ181-60113
Scan drive system, all models
on page 109
Separation pad assembly
RM2-5131-000CN
Internal assemblies (2 of 3)
on page 101
122 Chapter 2 Parts and diagrams
ENWW
Table 2-18 Alphabetical parts list (continued)
ENWW
Description
Part number
Table and page
Separator pad assembly (document feeder)
CB780-60009
Document feeder core, fax
models on page 119
SSA FFC Cable, 20 pin
CZ186-60104
Scanner assembly, base models
on page 107
SSA FFC Cable, 20-pin
CZ186-60104
Scanner assembly, fax models
on page 113
Stopper, paper (short media extension)
RC3-4904-000CN
Covers and external components
on page 97
Top cover with guide assembly
CZ181-60122
Document feeder top cover, fax
models on page 117
WiFi board (wireless PCA) (not shown)
1150-7953
Internal assemblies (1 of 3)
on page 99
Alphabetical parts list 123
Numerical parts list
Table 2-19 Numerical parts list
Part number
Description
Table and page
1150-7953
WiFi board (wireless PCA) (not shown)
Internal assemblies (1 of 3)
on page 99
CB780-60009
Separator pad assembly (document feeder)
Document feeder core, fax
models on page 119
CB780-60032
Pre-pick arm assembly
Document feeder top cover, fax
models on page 117
CE841-60119
Assembly link for fax models (hinge to support the scanner) (not
shown)
Covers and external components
on page 97
CE847-60110
Assembly link for base models (hinge to support the scanner) (not
shown)
Covers and external components
on page 97
CF206-60001
Fax module, Asia countries/regions and U.S. (not shown)
Internal assemblies (1 of 3)
on page 99
CF207-60001
Fax module, Europe (not shown)
Internal assemblies (1 of 3)
on page 99
CF208-60001
Fax module, Brazil (not shown)
Internal assemblies (1 of 3)
on page 99
CF484-60109
Control panel, fax plus wireless models (not shown)
Covers and external components
on page 97
CN503-60006
Scan motor encoder assembly
Scan drive system, all models
on page 109
CZ172-60001
Formatter PCA, base models, no wireless (not shown)
Internal assemblies (1 of 3)
on page 99
CZ172-60101
Scanner lid assembly (base models)
Scanner lid, base models
on page 105
CZ172-60102
Scanner lid (base models)
Scanner lid, base models
on page 105
CZ172-60103
Scan bezel assembly (base models)
Scanner assembly, base models
on page 107
CZ172-60104
Scanner base assembly (base models)
Scanner assembly, base models
on page 107
CZ172-60106
Scanner lid assembly, bulk pack (base models) (not shown)
Scanner lid, base models
on page 105
CZ172-60107
Scanner assembly (base models)
Scanner lid, base models
on page 105
CZ172-60110
Control panel, base models, no wireless (not shown)
Covers and external components
on page 97
CZ173-60001
Formatter PCA, base plus wireless models (not shown)
Internal assemblies (1 of 3)
on page 99
CZ176-60101
Control panel, base model, no wireless, Russia (not shown)
Covers and external components
on page 97
124 Chapter 2 Parts and diagrams
ENWW
Table 2-19 Numerical parts list (continued)
ENWW
Part number
Description
Table and page
CZ181-60001
Formatter PCA, fax plus wireless models (not shown)
Internal assemblies (1 of 3)
on page 99
CZ181-60101
Scanner and document feeder assembly
Scanner and document feeder
assembly, fax models
on page 111
CZ181-60102
Scan bezel (fax models)
Scanner assembly, fax models
on page 113
CZ181-60103
Scanner base assembly (fax models)
Scanner assembly, fax models
on page 113
CZ181-60104
Scan drive system assembly
Scanner assembly, base models
on page 107
CZ181-60104
Scan drive system assembly
Scanner assembly, fax models
on page 113
CZ181-60105
ADF top cover assembly
Document feeder assembly, fax
models on page 115
CZ181-60107
ADF core assembly
Document feeder assembly, fax
models on page 115
CZ181-60110
Document feeder assembly
Scanner and document feeder
assembly, fax models
on page 111
CZ181-60111
Scanner and document feeder assembly, bulk pack (not shown)
Scanner and document feeder
assembly, fax models
on page 111
CZ181-60112
Scanner assembly (fax models)
Scanner and document feeder
assembly, fax models
on page 111
CZ181-60113
Scanner with spring assembly
Scan drive system, all models
on page 109
CZ181-60117
Control panel, fax models, no wireless (not shown)
Covers and external components
on page 97
CZ181-60122
Top cover with guide assembly
Document feeder top cover, fax
models on page 117
CZ183-60001
Formatter PCA, fax models, no wireless (not shown)
Internal assemblies (1 of 3)
on page 99
CZ183-60101
Control panel, base plus wireless models (not shown)
Covers and external components
on page 97
CZ185-40001
Fax rubber cap (not shown)
Internal assemblies (1 of 3)
on page 99
CZ185-60101
Handset (not shown)
Covers and external components
on page 97
CZ186-60104
SSA FFC Cable, 20 pin
Scanner assembly, base models
on page 107
CZ186-60104
SSA FFC Cable, 20-pin
Scanner assembly, fax models
on page 113
Numerical parts list 125
Table 2-19 Numerical parts list (continued)
Part number
Description
Table and page
RC3-4904-000CN
Stopper, paper (short media extension)
Covers and external components
on page 97
RC3-5011-000CN
Cover, right
Covers and external components
on page 97
RC3-5015-000CN
Door, cartridge
Covers and external components
on page 97
RL1-2593-000CN
Roller, paper pickup
Internal assemblies (2 of 3)
on page 101
RL1-3872-000CN
Cover, top
Covers and external components
on page 97
RL1-3874-000CN
Cover, rear
Covers and external components
on page 97
RL2-0395-000CN
Cover, left
Covers and external components
on page 97
RL2-0396-000CN
Motor, DC 24 V
Internal assemblies (3 of 3)
on page 103
RM1-4023-000CN
Roller, transfer
Internal assemblies (2 of 3)
on page 101
RM1-9905-000CN
Paper delivery tray assembly (output bin)
Covers and external components
on page 97
RM1-9914-000CN
Fuser film assembly (110 V)
Internal assemblies (1 of 3)
on page 99
RM1-9915-000CN
Fuser film assembly (220 V)
Internal assemblies (1 of 3)
on page 99
RM1-9953-000CN
Image scanner lock assembly
Covers and external components
on page 97
RM1-9958-000CN
Paper pickup tray assembly
Covers and external components
on page 97
RM2-5126-000CN
Laser scanner assembly
Internal assemblies (3 of 3)
on page 103
RM2-5127-000CN
Front cover assembly
Covers and external components
on page 97
RM2-5131-000CN
Separation pad assembly
Internal assemblies (2 of 3)
on page 101
RM2-5133-000CN
Fuser paper delivery assembly (110 V)
Internal assemblies (1 of 3)
on page 99
RM2-5134-000CN
Fuser paper delivery assembly (220 V)
Internal assemblies (1 of 3)
on page 99
RM2-5135-000CN
Pickup transfer frame assembly
Internal assemblies (2 of 3)
on page 101
RM2-7377-000CN
Cable, flat (laser scanner)
Internal assemblies (3 of 3)
on page 103
126 Chapter 2 Parts and diagrams
ENWW
Table 2-19 Numerical parts list (continued)
ENWW
Part number
Description
Table and page
RM2-7378-000CN
Engine control PCA (220 V) for China/India
Internal assemblies (1 of 3)
on page 99
RM2-7381-000CN
Engine control PCA (110 V)
Internal assemblies (1 of 3)
on page 99
RM2-7382-000CN
Engine control PCA (220 V)
Internal assemblies (1 of 3)
on page 99
RM2-7384-000CN
Paper pickup sensor PCA assembly
Internal assemblies (2 of 3)
on page 101
RM2-7385-000CN
Motor PCA assembly
Internal assemblies (3 of 3)
on page 103
RM2-7629-000CN
Delivery sensor PCA assembly
Internal assemblies (1 of 3)
on page 99
Numerical parts list 127
128 Chapter 2 Parts and diagrams
ENWW
Index
A
accessories
ordering 92
ADF core
removal 81
ADF input guides and gear
removal 86
ADF pre-pickup arm assembly
removal 89
ADF separation pad
removal 82
ADF top cover
removal 80
after-service checklist 4
document feeder
part number 104
document feeder top cover
removal 80
doors
part number 96
B
before-service checklist
F
fax PCA
removal 42
field-replaceable units (FRUs)
replacing 2
formatter PCA
removal 37
front cover
removal 19
FRUs (field-replaceable units)
replacing 2
fuser
removal 60
4
C
cartridge
part number 92
cartridge door
removal 17
cautions iii
control panel
removal 19
conventions, document iii
covers
part number 96
CRUs (customer replaceable units)
kit part numbers 93
customer replaceable units (CRUs)
kit part numbers 93
D
delivery sensor PCA
removal 60
document conventions iii
ENWW
E
electrostatic discharge (ESD) 2
engine controller PCA
removal 51
ESD electrostatic discharge (ESD)
exchange units
part numbers 94
H
handset kit
part number
93
I
image scanner lock
removal 27
input tray
removal 6
installation 2
screws 2
See also replacing parts
K
kits
part number
2
93
L
laser scanner
cautions for servicing 2
removal 43
laser scanner cable
removal 43
left cover
removal 13
M
motor
removal 45
motor PCA
removal 45
N
notes iii
O
ordering
accessories, parts, and supplies
92
handset kit 93
kits 93
paper pickup tray kit 93
pickup roller kit 93
product documents 92
separation pad kit 93
short-media extender tool kit
93
toner cartridge 92
whole-unit replacement 94
Index 129
output bin
removal 12
P
paper pickup tray kit
part number 93
paper-delivery tray
removal 12
part numbers
covers and external
components 96
handset kit 93
internal assemblies 98
kits 93
paper pickup tray kit 93
pickup roller kit 93
product documents 92
scanner and document feeder
components 104
separation pad kit 93
short-media extender tool kit
93
toner cartridge 92
whole-unit replacement 94
parts
ordering 92
pickup assembly
removal 64
pickup assembly PCA
removal 64
pickup roller
removal 7
pickup roller kit
part number 93
R
rear cover
removal 29
removing parts
about 2
after-service checklist 4
before-service checklist 4
service approach 4
tools, required 2
repair approach 4
replacement units
part numbers 94
replacing parts
about 2
after-service checklist 4
130 Index
before-service checklist 4
screws 2
service approach 4
tools, required 2
right cover
removal 24
W
warnings iii
wireless PCA
removal 35
S
scan bezel
removal 71
scan drive system
removal 73
scan FFC cable
removal 74
scan motor
removal 76
scanner
part number 104
scanner assembly
removal 14
scanner spring assembly
removal 78
screwdrivers, required 2
screws
installing 2
types of 3
separation pad
removal 10
separation pad kit
part number 93
service approach 4
short media extender
removal 7
short-media extender tool kits
part number 93
static, precautions for 2
supplies
ordering 92
T
tips iii
toner cartridge
part number 92
removal 5
tools, required 2
top cover
removal 27
troubleshooting
service approach 4
ENWW
© 2013 Hewlett-Packard Development Company, L.P.
www.hp.com
*CZ183-90905*
*CZ183-90905*
CZ183-90905
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