Loading...HP LaserJet Pro MFP M125, LaserJet Pro MFP M126, LaserJet Pro MFP M127, LaserJet Pro MFP M128 Repair Manual
LASERJET PRO MFP
Repair Manual
M125-126 |
M127-128 |
M127-128 |
HP LaserJet Pro MFP M125, M126, M127,
M128
Repair Manual
Copyright and License
© 2013 Copyright Hewlett-Packard
Development Company, L.P.
Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.
The information contained herein is subject to change without notice.
The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
Part number: CZ183-90905
Edition 1, 9/2013
Trademark Credits
Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation.
Conventions used in this guide
TIP: Tips provide helpful hints or shortcuts.
NOTE: Notes provide important information to explain a concept or to complete a task.
CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the product.
WARNING! Warnings alert you to specific procedures that you should follow to avoid personal injury, catastrophic loss of data, or extensive damage to the product.
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iii |
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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1 Removal and replacement
●Removal and replacement strategy
●Service approach
●Removal and replacement procedures
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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 |
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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 |
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, |
M4×10 |
0515-4680 |
Used to secure the front |
|
black |
|
|
cover |
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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.
4 Chapter 1 Removal and replacement |
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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 5 |
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
6 Chapter 1 Removal and replacement |
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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 7 |
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 |
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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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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)
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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)
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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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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)
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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)
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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)
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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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3.Remove the cartridge door.
Figure 1-25 Remove the cartridge door (3 of 3)
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