HP m125, m126, m127, m128 Repair Manual

LASERJET PRO MFP

Repair Manual

M125-126 M127-128 M127-128

HP LaserJet Pro MFP M125, M126, M127, M128

Repair Manual

Trademark Credits

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

Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation.

Conventions used in this guide

TIP: Tips provide helpful hints or shortcuts.

NOTE: Notes provide important information to explain a concept or to complete a task.

CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the

product.

WARNING! Warnings alert you to specific procedures that you should follow to avoid personal injury,

catastrophic loss of data, or extensive damage to the product.

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iv Conventions used in this guide ENWW

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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viii ENWW

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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x ENWW

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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1 Removal and replacement

●

Removal and replacement strategy

●

Service approach

●

Removal and replacement procedures

ENWW 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

2 Chapter 1 Removal and replacement ENWW

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 Description Size Part number Use

Screw, pan head, silver M3×6 0515-2908 Used to secure electrical

Screw, pan head, black M3×8 0515-4681 Used to secure the left

Screw, tapping, pan head, black

M4×10 0515-4680 Used to secure the front

boards and ground wires

cover

ENWW 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

●

Remove the input tray. See

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.

Toner cartridge on page 5.

Input tray on page 6.

4 Chapter 1 Removal and replacement ENWW

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)

ENWW Removal and replacement procedures 5

Input tray

3. Remove the toner cartridge.

Figure 1-4 Remove the toner cartridge (3 of 3)

▲

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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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)

8 Chapter 1 Removal and replacement ENWW

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)

ENWW Removal and replacement procedures 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)

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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)

ENWW Removal and replacement procedures 11

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

12 Chapter 1 Removal and replacement ENWW

Left cover

Before proceeding, remove the following components:

●

Paper-delivery tray. See

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)

Paper-delivery tray (output bin extension) on page 12.

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)

ENWW 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

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

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)

Left cover on page 13.

Left-side PCAs

14 Chapter 1 Removal and replacement ENWW

+ 118 hidden pages