HP Color Laserjet M351, M451 service manual
LASERJET PRO 300 COLOR
LASERJET PRO 400 COLOR
Service Manual
M351
M451
HP LaserJet Pro 300 color M351 and HP
LaserJet Pro 400 color M451 Printers
Service Manual
Copyright and License
Trademark Credits
© 2012 Copyright Hewlett-Packard
Development Company, L.P.
Reproduction, adaptation, or translation
without prior written permission is
prohibited, except as allowed under the
copyright laws.
The information contained herein is subject
to change without notice.
The only warranties for HP products and
services are set forth in the express warranty
statements accompanying such products and
services. Nothing herein should be
construed as constituting an additional
warranty. HP shall not be liable for technical
or editorial errors or omissions contained
herein.
Part number: CE955-90964
Edition 1, 1/2012
Microsoft®, Windows®, Windows® XP,
and Windows Vista® are U.S. registered
trademarks of Microsoft Corporation.
ENERGY STAR and the ENERGY STAR mark
are registered U.S. marks.
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
Removal and replacement strategy .............................................................................. 2
Electrostatic discharge ............................................................................................... 3
Required tools ........................................................................................................... 4
Types of screws ........................................................................................................ 5
Service approach ..................................................................................................................... 6
Before performing service .......................................................................................... 6
After performing service ............................................................................................. 6
Post-service test ......................................................................................................... 6
Print-quality test .......................................................................................... 6
Parts removal order ................................................................................................... 7
Removal and replacement procedures ........................................................................................ 8
Tray 2 cassette ......................................................................................................... 8
Rollers and pads ....................................................................................................... 9
Replace the transfer roller ............................................................................ 9
Replace the pickup roller ........................................................................... 10
Repalce the separation roller ..................................................................... 12
Reinstall the separation roller ...................................................... 14
Replace the pickup roller and separation pad (Tray 1) .................................. 15
Main assemblies ..................................................................................................... 18
Print-cartridge drawer ............................................................................... 18
DIMM cover ............................................................................................ 20
Right cover .............................................................................................. 21
Reinstall the right cover .............................................................. 23
Rear-upper cover (duplex product) .............................................................. 24
Rear-door stopper and link caps (simplex product) ........................................ 25
Rear door (simplex product) ....................................................................... 26
Rear door (duplex product) ........................................................................ 28
Rear cover and feed guide (simplex product) ............................................... 30
Remove the rear cover and feed guide (simplex product) ................ 30
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Rear-lower cover and rear-door links (duplex product) ................................... 34
Remove the rear-lower cover and rear-door links (duplex product) ... 34
Rear-door rib assembly (duplex product) ..................................................... 38
Remove the rear-door rib assembly (duplex product) ...................... 38
Link guide ............................................................................................... 40
Upper-cover assembly ............................................................................... 41
Reinstall the upper cover ............................................................ 43
Left cover ................................................................................................ 44
Remove the left cover ................................................................. 44
Reinstall the left cover ................................................................ 46
Right-front cover and power button ............................................................. 47
Remove the right-front cover and power button .............................. 47
Paper-feed guide assembly ........................................................................ 48
Control-panel assembly ............................................................................. 50
Remove the control-panel assembly .............................................. 50
Right panel .............................................................................................. 52
Remove the right panel .............................................................. 52
Front-door assembly ................................................................................. 57
Remove the front-door assembly .................................................. 57
Reinstall the front-door assembly .................................................. 62
Intermediate transfer belt (ITB) .................................................................... 64
Reinstall the ITB ......................................................................... 67
Drum motor (M1) and developer motor (M2) ............................................... 68
Reinstall the drum motor (M1) and developer motor (M2) ............... 71
Intermediate PCA ..................................................................................... 72
Remove the intermediate PCA ..................................................... 72
Formatter PCA ......................................................................................... 74
Special considerations ............................................................... 74
Remove the formatter PCA .......................................................... 74
DC controller PCA .................................................................................... 76
Special considerations ............................................................... 76
Remove the DC controller PCA .................................................... 76
Fuser motor assembly ............................................................................... 78
Remove the fuser motor assembly ................................................ 78
Reinstall the fuser motor assembly ................................................ 80
High-voltage power-supply PCA ................................................................. 81
Remove the high-voltage power-supply PCA .................................. 81
Color-misregistration sensor assembly PCA .................................................. 84
Remove the color-misregistration sensor assembly PCA ................... 84
Reinstall the color-misregistration sensor assembly ......................... 86
Fan ........................................................................................................ 88
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Duplex reverse-drive assembly ................................................................... 89
Remove the duplex reverse-drive assembly .................................... 89
Fuser ...................................................................................................... 92
Remove the fuser ....................................................................... 92
Reinstall the fuser ...................................................................... 97
Paper-delivery assembly ............................................................................ 98
Remove the paper-delivery assembly ............................................ 98
2 Solve problems ............................................................................................................................... 101
Solve problems checklist ....................................................................................................... 102
Menu map .......................................................................................................................... 102
Troubleshooting process ........................................................................................................ 103
Pretroubleshooting checklist .................................................................................... 103
Power-on checks ................................................................................................... 105
Tools for troubleshooting ....................................................................................................... 106
Engine diagnostics ................................................................................................ 106
Diagrams ............................................................................................................. 106
Plug/jack locations ................................................................................. 106
Location of connectors ............................................................................ 107
DC controller PCA ................................................................... 107
Location of major components ................................................................. 108
Major components .................................................................. 108
Solenoids, clutches, and sensors ............................................... 109
Rollers .................................................................................... 111
Motors and fans ...................................................................... 112
PCAs ..................................................................................... 113
General timing charts ............................................................................. 114
General circuit diagram .......................................................................... 115
CPU/ASIC diagrams .............................................................................. 116
HVT/Toner EMP diagram ........................................................................ 118
Driver PCA diagram ............................................................................... 119
Duplexer PCA diagram ........................................................................... 120
FSR diagram .......................................................................................... 121
Internal print quality test pages ............................................................................... 122
Print quality troubleshooting page ............................................................ 122
Print quality assessment page .................................................................. 122
Print the configuration page ..................................................................... 122
Print-quality troubleshooting tools ............................................................................ 123
Repetitive image defects .......................................................................... 123
Calibrate the product .............................................................................. 123
Control panel menus .............................................................................................. 124
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Reports menu ......................................................................................... 124
Quick Forms menu ................................................................................. 124
System Setup menu ................................................................................. 125
Service menu ......................................................................................... 129
Network Setup menu .............................................................................. 130
Interpret control panel messages ............................................................................. 132
Control panel message types ................................................................... 132
Control panel messages .......................................................................... 132
10.XXXX Supply error .............................................................. 132
49 Error Turn off then on .......................................................... 132
50.X Fuser error Turn off then on ............................................... 133
51.XX Error Turn off then on ..................................................... 133
54.XX Error Turn off then on ..................................................... 133
55.X Error Turn off then on ....................................................... 134
57 Fan error Turn off then on .................................................... 134
59.X Error Turn off then on ....................................................... 134
79 Error Turn off then on .......................................................... 134
79 Service error Turn off then on ............................................... 135
Black cartridge low ................................................................. 135
Black in wrong position ............................................................ 135
Black very low ........................................................................ 135
Cleaning . . . .......................................................................... 136
Cyan cartridge low ................................................................. 136
Cyan in wrong position ............................................................ 136
Cyan very low ........................................................................ 136
Device error Press [OK] ............................................................ 137
Front door open ...................................................................... 137
Genuine HP supply installed ..................................................... 137
Incompatible <color> ............................................................... 137
Incorrect supplies .................................................................... 137
Install <color> cartridge ........................................................... 138
Invalid driver Press [OK] .......................................................... 138
Jam in <location> .................................................................... 138
Jam in tray # Clear jam and then Press [OK] .............................. 138
Load tray # <TYPE> <SIZE> ..................................................... 138
Load tray 1 plain <SIZE> Cleaning Mode [OK] to start ................ 139
Load tray <X> Press [OK] for available media ............................ 139
Load tray 1 <TYPE> <SIZE> ..................................................... 139
Magenta cartridge low ............................................................ 139
Magenta in wrong position ...................................................... 139
Magenta very low ................................................................... 140
viii ENWW
Manual duplex Load tray <X> Press [OK] ................................... 140
Manual feed <TYPE> <SIZE> Press [OK] for available media ....... 140
Memory is low Press [OK] ........................................................ 140
Misprint Press [OK] ................................................................. 141
Print failure, press OK. If error repeats, turn off then on. ............... 141
Rear door open ....................................................................... 141
Remove shipping lock from <color> cartridge ............................. 141
Remove shipping locks from cartridges ...................................... 141
Replace <color> ..................................................................... 142
Supplies low ........................................................................... 142
Unexpected size in tray # Load <size> Press [OK] ...................... 142
Unsupported <color> Press [OK] to continue ............................... 142
Used <color> in use ................................................................ 143
Used <color> installed Press [OK] to continue ............................. 143
Used supplies in use ................................................................ 143
Yellow cartridge low ................................................................ 143
Yellow in wrong position .......................................................... 143
Yellow very low ...................................................................... 144
Event log messages ............................................................................................... 145
Clear jams .......................................................................................................................... 147
Common causes of jams ........................................................................................ 147
Jam locations ........................................................................................................ 147
Clear jams in Tray 1 .............................................................................................. 148
Clear jams in Tray 2 .............................................................................................. 149
Clear jams in the fuser area ................................................................................... 150
Clear jams in the output bin .................................................................................... 152
Clear jams in the duplexer (duplexing models only) ................................................... 152
Solve paper-handling problems .............................................................................................. 155
The product picks up multiple sheets of paper ........................................................... 155
The product does not pick up paper ........................................................................ 155
Solve image-quality problems ................................................................................................ 156
Print quality examples ............................................................................................ 156
Color image defects .............................................................................................. 160
Clean the product ................................................................................................................ 162
Clean the pickup and separation rollers ................................................................... 162
Clean the paper path ............................................................................................ 162
Solve performance problems ................................................................................................. 163
Factors affecting print performance ......................................................................... 163
Print speeds ........................................................................................... 164
The product does not print or it prints slowly ............................................................. 165
The product does not print ....................................................................... 165
ENWW ix
The product prints slowly ......................................................................... 166
Solve product connectivity problems ....................................................................................... 167
Solve direct-connect problems ................................................................................. 167
Solve network problems ......................................................................................... 167
Poor physical connection ......................................................................... 167
The computer is using the incorrect IP address for the product ...................... 167
The computer is unable to communicate with the product ............................ 168
The product is using incorrect link and duplex settings for the network .......... 168
New software programs might be causing compatibility problems ................ 168
The computer or workstation might be set up incorrectly .............................. 168
The product is disabled, or other network settings are incorrect .................... 168
Solve wireless network problems ............................................................................. 169
Wireless connectivity checklist ................................................................. 169
The control panel displays the message: The wireless feature on this product
has been turned off ................................................................................ 170
The product does not print after the wireless configuration completes ............ 170
The product does not print, and the computer has a third-party firewall
installed ................................................................................................ 170
The wireless connection does not work after moving the wireless router or
product ................................................................................................. 170
Cannot connect more computers to the wireless product .............................. 171
The wireless product loses communication when connected to a VPN ........... 171
The network does not appear in the wireless networks list ........................... 171
The wireless network is not functioning ...................................................... 172
Service mode functions ......................................................................................................... 173
Service menu ........................................................................................................ 173
Secondary service menu ........................................................................................ 174
Open the secondary service menu ............................................................ 174
Secondary service menu structure ............................................................. 174
Product resets ....................................................................................................... 175
Restore factory-set defaults ....................................................................... 175
NVRAM initialization .............................................................................. 175
Cold reset ............................................................................................. 176
Product updates ................................................................................................................... 176
3 Parts and diagrams ......................................................................................................................... 177
Order parts by authorized service providers ............................................................................ 178
Orderable parts .................................................................................................... 178
Whole unit replacement ......................................................................................... 178
Related documentation and software ....................................................................... 179
Supplies and accessories ....................................................................................... 179
x ENWW
Service parts ........................................................................................................ 180
How to use the parts lists and diagrams .................................................................................. 181
Covers ................................................................................................................................ 182
Internal assemblies ............................................................................................................... 184
Internal assemblies (1 of 5) ..................................................................................... 184
Internal assemblies (2 of 5) ..................................................................................... 186
Internal components (3 of 5) ................................................................................... 188
Internal assemblies (4 of 5) ..................................................................................... 190
Internal assemblies (5 of 5) ..................................................................................... 192
Internal assemblies (simplex models) ........................................................................ 194
Internal assemblies (duplex models) ......................................................................... 196
PCAs ................................................................................................................... 198
Input device(s) ..................................................................................................................... 200
250-sheet paper feeder (optional Tray 3) ................................................................. 200
Alphabetical parts list ........................................................................................................... 202
Numerical parts list .............................................................................................................. 205
Appendix A Service and support ......................................................................................................... 209
Hewlett-Packard limited warranty statement ............................................................................. 210
HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement .................. 212
Data stored on the print cartridge ........................................................................................... 213
End User License Agreement .................................................................................................. 214
OpenSSL ............................................................................................................................. 217
Customer support ................................................................................................................. 218
Repack the product .............................................................................................................. 219
Appendix B Product specifications ........................................................................................................ 221
Physical specifications .......................................................................................................... 222
Power consumption, electrical specifications, and acoustic emissions .......................................... 222
Environmental specifications .................................................................................................. 222
Appendix C Regulatory information ...................................................................................................... 223
FCC regulations ................................................................................................................... 224
Environmental product stewardship program ........................................................................... 225
Protecting the environment ...................................................................................... 225
Ozone production ................................................................................................. 225
Power consumption ............................................................................................... 225
Toner consumption ................................................................................................ 225
Paper use ............................................................................................................. 225
Plastics ................................................................................................................. 225
ENWW xi
HP LaserJet print supplies ....................................................................................... 226
Return and recycling instructions ............................................................................. 226
United States and Puerto Rico .................................................................. 226
Multiple returns (more than one cartridge) .................................. 226
Single returns .......................................................................... 226
Shipping ................................................................................ 226
Non-U.S. returns .................................................................................... 227
Paper .................................................................................................................. 227
Material restrictions ............................................................................................... 227
Disposal of waste equipment by users in private households in the European Union ...... 228
Chemical substances ............................................................................................. 228
Material Safety Data Sheet (MSDS) ......................................................................... 228
For more information ............................................................................................. 229
Declaration of conformity ...................................................................................................... 230
Declaration of conformity (wireless models) ............................................................................. 232
Certificate of volatility ........................................................................................................... 234
Types of memory ................................................................................................... 234
Volatile memory ..................................................................................... 234
Non-volatile memory .............................................................................. 234
Safety statements ................................................................................................................. 235
Laser safety .......................................................................................................... 235
Canadian DOC regulations .................................................................................... 235
VCCI statement (Japan) .......................................................................................... 235
Power cord instructions .......................................................................................... 235
Power cord statement (Japan) ................................................................................. 235
EMC statement (Korea) .......................................................................................... 236
Laser statement for Finland ..................................................................................... 236
GS statement (Germany) ........................................................................................ 237
Substances Table (China) ....................................................................................... 237
Restriction on Hazardous Substances statement (Turkey) ............................................. 237
Restriction on Hazardous Substances statement (Ukraine) ........................................... 237
Additional statements for wireless products .............................................................................. 238
FCC compliance statement—United States ................................................................ 238
Australia statement ................................................................................................ 238
Brazil ANATEL statement ........................................................................................ 238
Canadian statements ............................................................................................. 238
European Union regulatory notice ........................................................................... 238
Notice for use in France ......................................................................................... 239
Notice for use in Russia ......................................................................................... 239
Korean statement .................................................................................................. 239
Taiwan statement .................................................................................................. 240
xii ENWW
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............. 240
Index ................................................................................................................................................. 241
ENWW xiii
xiv ENWW
List of tables
Table 1-1 Common fasteners ................................................................................................................. 5
Table 2-1 DC controller connectors ..................................................................................................... 107
Table 2-2 Major components ............................................................................................................. 108
Table 2-3 Solenoid, clutches, and sensors ............................................................................................ 109
Table 2-4 Rollers ............................................................................................................................... 111
Table 2-5 PCAs ................................................................................................................................ 113
Table 2-6 Repetitive image defects ...................................................................................................... 123
Table 2-7 Event-log messages ............................................................................................................. 145
Table 2-8 2ndary Service menu .......................................................................................................... 174
Table 3-1 Order parts, accessories, and supplies .................................................................................. 178
Table 3-2 Pro 300 Color M351a ........................................................................................................ 178
Table 3-3 Pro 400 Color MFP M451dn ............................................................................................... 178
Table 3-4 Pro 400 ColorMFP M451nw ............................................................................................... 178
Table 3-5 Pro 400 ColorMFP M451dw ............................................................................................... 178
Table 3-6 Related documentation and software .................................................................................... 179
Table 3-7 Covers
Table 3-8 Internal assemblies (1 of 7) .................................................................................................. 185
Table 3-9 Internal assemblies (2 of 7) .................................................................................................. 187
Table 3-10 Internal assemblies (3 of 7) ................................................................................................ 189
Table 3-11 Internal assemblies (4 of 7) ................................................................................................ 191
Table 3-12 Internal assemblies (5 of 7) ................................................................................................ 193
Table 3-13 Internal assemblies (simplex models) ................................................................................... 195
Table 3-14 Internal assemblies (duplex models) .................................................................................... 197
Table 3-15 PCAs .............................................................................................................................. 199
Table 3-16 250-sheet paper feeder (optional Tray 3) ............................................................................ 201
Table 3-17 Alphabetical parts list ....................................................................................................... 202
Table 3-18 Numerical parts list ........................................................................................................... 205
Table B-1 Physical specifications ......................................................................................................... 222
Table B-2 Operating-environment specifications .................................................................................... 222
1,2
........................................................................................................................... 183
ENWW xv
xvi ENWW
List of figures
Figure 1-1 Phillips and pozidrive screwdriver comparison .......................................................................... 4
Figure 1-2 Parts removal order (1 of 2) .................................................................................................... 7
Figure 1-3 Parts removal order (2 of 2) .................................................................................................... 7
Figure 1-4 Remove the Tray 2 cassette ..................................................................................................... 8
Figure 1-5 Remove the pickup roller (1 of 2) ........................................................................................... 11
Figure 1-6 Remove the pickup roller (2 of 2) ........................................................................................... 11
Figure 1-7 Remove the separation roller (1 of 3) ..................................................................................... 12
Figure 1-8 Remove the separation roller (2 of 3) ..................................................................................... 13
Figure 1-9 Remove the separation roller (3 of 3) ..................................................................................... 13
Figure 1-10 Reinstall the separation roller .............................................................................................. 14
Figure 1-11 Remove the Tray 1 paper-pickup roller (1 of 3) ..................................................................... 16
Figure 1-12 Remove the Tray 1 paper-pickup roller (2 of 3) ..................................................................... 16
Figure 1-13 Remove the Tray 1 paper-pickup roller (3 of 3) ..................................................................... 17
Figure 1-14 Remove the Tray 1 separation pad ...................................................................................... 17
Figure 1-15 Remove the print-cartridge drawer (1 of 3) ........................................................................... 18
Figure 1-16 Remove the print-cartridge drawer (2 of 3) ........................................................................... 18
Figure 1-17 Remove the print-cartridge drawer (3 of 3) ........................................................................... 19
Figure 1-18 Remove the DIMM cover .................................................................................................... 20
Figure 1-19 Remove the right cover (1 of 5) ........................................................................................... 21
Figure 1-20 Remove the right cover (2 of 5) ........................................................................................... 21
Figure 1-21 Remove the right cover (3 of 5) ........................................................................................... 22
Figure 1-22 Remove the right cover (4 of 5) ........................................................................................... 22
Figure 1-23 Remove the right cover (5 of 5) ........................................................................................... 23
Figure 1-24 Reinstall the right cover ...................................................................................................... 23
Figure 1-25 Remove the rear-upper cover (1 of 2) ................................................................................... 24
Figure 1-26 Remove the rear-upper cover (2 of 2) ................................................................................... 24
Figure 1-27 Remove the rear-door stopper and link caps (simplex product) (1 of 2) ..................................... 25
Figure 1-28 Remove the rear-door stopper and link cap (simple
Figure 1-29 Remove the rear door (simplex product) (1 of 4) .................................................................... 26
Figure 1-30 Remove the rear door (simplex product) (2 of 4) .................................................................... 26
Figure 1-31 Remove the rear door (simplex product) (3 of 4) .................................................................... 27
Figure 1-32 Remove the rear door (simplex product) (4 of 4) .................................................................... 27
x product) (2 of 2) ...................................... 25
ENWW xvii
Figure 1-33 Remove the rear door (duplex product) (1 of 4) ..................................................................... 28
Figure 1-34 Remove the rear door (duplex product) (2 of 4) ..................................................................... 28
Figure 1-35 Remove the rear door (duplex product) (3 of 4) ..................................................................... 29
Figure 1-36 Remove the rear door (duplex product) (4 of 4) ..................................................................... 29
Figure 1-37 Remove the rear cover and feed guide (simplex product) (1 of 6) ............................................ 30
Figure 1-38 Remove the rear cover and feed guide (simplex product) (2 of 6) ............................................ 31
Figure 1-39 Remove the rear cover and feed guide (simplex product) (3 of 6) ............................................ 31
Figure 1-40 Remove the rear cover and feed guide (simplex product) (4 of 6) ............................................ 32
Figure 1-41 Remove the rear cover and feed guide (simplex product) (5 of 6) ............................................ 33
Figure 1-42 Remove the rear cover and feed guide (simplex product) (6 of 6) ............................................ 33
Figure 1-43 Remove the rear-lower cover and rear-door links (duplex product) (1 of 6) ................................ 34
Figure 1-44 Remove the rear-lower cover and rear-door links (duplex product) (2 of 6) ................................ 35
Figure 1-45 Remove the rear-lower cover and rear-door links (duplex product) (3 of 6) ................................ 35
Figure 1-46 Remove the rear-lower cover and link-guides (duplex product) (4 of 6) ..................................... 36
Figure 1-47 Remove the rear-lower cover and link-guides (duplex product) (5 of 6) ..................................... 36
Figure 1-48 Remove the rear-lower cover and rear-door links (duplex product) (6 of 6) ................................ 37
Figure 1-49 Remove the rear-door rib assembly (duplex product) (1 of 3) .................................................. 38
Figure 1-50 Remove the rear-door rib assembly (duplex product) (2 of 3) .................................................. 39
Figure 1-51 Remove the rear-door rib assembly (duplex product) (3 of 3) .................................................. 39
Figure 1-52 Replace the link guide (simplex products) ............................................................................. 40
Figure 1-53 Replace the link guide (duplex products) .............................................................................. 40
Figure 1-54 Remove the upper-cover assembly (1 of 4) ............................................................................ 41
Figure 1-55 Remove the upper-cover assembly (2 of 4) ............................................................................ 41
Figure 1-56 Remove the upper-cover assembly (3 of 4) ............................................................................ 42
Figure 1-57 Remove the upper-cover assembly (4 of 4) ............................................................................ 42
Figure 1-58 Upper-cover tabs correctly seated ........................................................................................ 43
Figure 1-59 Upper-cover tabs
Figure 1-60 Remove the left cover (1 of 3) ............................................................................................. 44
Figure 1-61 Remove the left cover (2 of 3) ............................................................................................. 45
Figure 1-62 Remove the left cover (3 of 3) ............................................................................................. 45
Figure 1-63 Reinstall the left cover (1 of 2) ............................................................................................. 46
Figure 1-64 Reinstall the left cover (2 of 2) ............................................................................................. 46
Figure 1-65 Remove the right-front cover and power button (1 of 2) .......................................................... 47
Figure 1-66 Remove the right-front cover and power button (2 of 2) .......................................................... 48
Figure 1-67 Remove the feed assembly (1 of 2) ...................................................................................... 48
Figure 1-68 Remove the feed assembly (2 of 2) ...................................................................................... 49
Figure 1-69 Remove the control-panel assembly (1 of 3) .......................................................................... 50
Figure 1-70 Remove the control-panel assembly (2 of 3) .......................................................................... 51
Figure 1-71 Remove the control-panel assembly (3 of 3) .......................................................................... 51
Figure 1-72 Remove the right panel (1 of 8) ........................................................................................... 52
Figure 1-73 Remove the right panel (2 of 8) ........................................................................................... 53
not
correctly seated .................................................................................. 43
xviii ENWW
Figure 1-74 Remove the right panel (3 of 8) ........................................................................................... 53
Figure 1-75 Remove the right panel (4 of 8) ........................................................................................... 54
Figure 1-76 Remove the right panel (5 of 8) ........................................................................................... 54
Figure 1-77 Remove the right panel (6 of 8) ........................................................................................... 55
Figure 1-78 Remove the right panel (7 of 8) ........................................................................................... 55
Figure 1-79 Remove the right panel (8 of 8) ........................................................................................... 56
Figure 1-80 Remove the front-door assembly (1 of 10) ............................................................................. 57
Figure 1-81 Remove the front-door assembly (2 of 10) ............................................................................. 58
Figure 1-82 Remove the front-door assembly (3 of 10) ............................................................................. 58
Figure 1-83 Remove the front-door assembly (4 of 10) ............................................................................. 59
Figure 1-84 Remove the front-door assembly (5 of 10) ............................................................................. 59
Figure 1-85 Remove the front-door assembly (6 of 10) ............................................................................. 60
Figure 1-86 Remove the front-door assembly (7 of 10) ............................................................................. 60
Figure 1-87 Remove the front-door assembly (8 of 10) ............................................................................. 61
Figure 1-88 Remove the front-door assembly (9 of 10) ............................................................................. 61
Figure 1-89 Remove the front-door assembly (10 of 10) ........................................................................... 62
Figure 1-90 Reinstall the front-door assembly (1 of 2) .............................................................................. 62
Figure 1-91 Reinstall the front-door assembly (2 of 2) .............................................................................. 63
Figure 1-92 Remove the ITB (1 of 6) ...................................................................................................... 64
Figure 1-93 Remove the ITB (2 of 6) ...................................................................................................... 64
Figure 1-94 Remove the ITB (3 of 6) ...................................................................................................... 65
Figure 1-95 Remove the ITB (4 of 6) ...................................................................................................... 65
Figure 1-96 Remove the ITB (5 of 6) ...................................................................................................... 66
Figure 1-97 Remove the ITB (6 of 6) ...................................................................................................... 66
Figure 1-98 Reinstall the ITB ................................................................................................................. 67
Figure 1-99 Remove motor M1 or motor M2 (1 of 5) .............................................................................. 68
Figure 1-100 Remove motor M1 and motor M2 (2 of 5) .......................................................................... 69
Figure 1-101 Remove motor M1 and motor M2 (3 of 5) .......................................................................... 69
Figure 1-102 Re
Figure 1-103 Remove motor M1 and motor M2 (5 of 5) .......................................................................... 70
Figure 1-104 Reinstall the motor M1 and motor M2 wire-harness retainer .................................................. 71
Figure 1-105 Remove the Intermediate PCA (1 of 2) ................................................................................ 72
Figure 1-106 Remove the Intermediate PCA (2 of 2) ................................................................................ 73
Figure 1-107 Remove the formatter PCA (1 of 2) .................................................................................... 75
Figure 1-108 Remove the formatter PCA (2 of 2) .................................................................................... 75
Figure 1-109 Remove the DC controller PCA (1 of 2) .............................................................................. 77
Figure 1-110 Remove the DC controller PCA (2 of 2) .............................................................................. 77
Figure 1-111 Remove the fuser motor assembly (1 of 4) ........................................................................... 78
Figure 1-112 Remove the fuser motor assembly (2 of 4) ........................................................................... 79
Figure 1-113 Remove the fuser motor assembly (3 of 4) ........................................................................... 79
Figure 1-114 Remove the fuser motor assembly (4 of 4) ........................................................................... 80
move motor M1 and motor M2 (4 of 5) .......................................................................... 70
ENWW xix
Figure 1-115 Reinstall the fuser motor assembly ...................................................................................... 80
Figure 1-116 Remove the high-voltage power-supply PCA (1 of 5) ............................................................ 81
Figure 1-117 Remove the high-voltage power-supply PCA (2 of 5) ............................................................ 82
Figure 1-118 Remove the high-voltage power-supply PCA (3 of 5) ............................................................ 82
Figure 1-119 Remove the high-voltage power-supply PCA (4 of 5) ............................................................ 83
Figure 1-120 Remove the high-voltage power-supply PCA (5 of 5) ............................................................ 83
Figure 1-121 Remove the color-misregistration sensor assembly PCA (1 of 4) ............................................. 84
Figure 1-122 Remove the color-misregistration sensor assembly PCA (2 of 4) ............................................. 85
Figure 1-123 Remove the color-misregistration sensor assembly PCA (3 of 4) ............................................. 85
Figure 1-124 Remove the color-misregistration sensor assembly PCA (4 of 4) ............................................. 86
Figure 1-125 Reinstall the color-misregistration sensor assembly PCA (1 of 2) ............................................. 86
Figure 1-126 Reinstall the color-misregistration sensor assembly PCA (2 of 2) ............................................. 87
Figure 1-127 Remove the fan (1 of 2) .................................................................................................... 88
Figure 1-128 Remove the fan (2 of 2) .................................................................................................... 88
Figure 1-129 Remove the duplex reverse-drive assembly (1 of 4) .............................................................. 89
Figure 1-130 Remove the duplex reverse-drive assembly (2 of 4) .............................................................. 90
Figure 1-131 Remove the duplex reverse-drive assembly (3 of 4) .............................................................. 90
Figure 1-132 Remove the duplex reverse-drive assembly (4 of 4) .............................................................. 91
Figure 1-133 Remove the fuser (1 of 8) ................................................................................................. 92
Figure 1-134 Remove the fuser (2 of 8) ................................................................................................. 93
Figure 1-135 Remove the fuser (3 of 8) ................................................................................................. 93
Figure 1-136 Remove the fuser (4 of 8) ................................................................................................. 94
Figure 1-137 Remove the fuser (5 of 8) ................................................................................................. 94
Figure 1-138 Remove the fuser (6 of 8) ................................................................................................. 95
Figure 1-139 Remove the fuser (7 of 8) ................................................................................................. 95
Figure 1-140 Remove the fuser (8 of 8) ................................................................................................. 96
Figure 1-141 Reinstall the fuser ............................................................................................................. 97
Figure 1-142 Remove the paper-delivery assembly (1 of 4) ...................................................................... 98
Figure 1-143 Remove the paper-delivery assembly (2 of 4) ...................................................................... 99
Figure 1-144 Remove the paper-delivery assembly (3 of 4) ...................................................................... 99
Figure 1-145 Remove the paper-delivery assembly (4 of 4) .................................................................... 100
Figure 2-1 Engine test button location .................................................................................................. 106
Figure 2-2 DC controller connectors .................................................................................................... 107
Figure 2-
Figure 2-4 Solenoid, clutches, and sensors ........................................................................................... 109
Figure 2-5 Rollers .............................................................................................................................. 111
Figure 2-6 Motors and fans ................................................................................................................ 112
Figure 2-7 PCAs ............................................................................................................................... 113
Figure 2-8 Timing diagram ................................................................................................................. 114
Figure 2-9 Circuit diagram ................................................................................................................. 115
Figure 2-10 CPU diagram ................................................................................................................. 116
3 Major components ............................................................................................................ 108
xx ENWW
Figure 2-11 ASIC diagram ................................................................................................................. 117
Figure 2-12 HVT/Toner EMP diagram ................................................................................................. 118
Figure 2-13 Driver PCA diagram ........................................................................................................ 119
Figure 2-14 Duplexer PCA diagram .................................................................................................... 120
Figure 2-15 FSR diagram ................................................................................................................... 121
Figure 3-1 Covers, panels, and doors ................................................................................................. 182
Figure 3-2 Internal assemblies (1 of 7) ................................................................................................. 184
Figure 3-3 Internal assemblies (2 of 7) ................................................................................................. 186
Figure 3-4 Internal assemblies (3 of 7) ................................................................................................. 188
Figure 3-5 Internal assemblies (4 of 7) ................................................................................................. 190
Figure 3-6 Internal assemblies (5 of 7) ................................................................................................. 192
Figure 3-7 Internal assemblies (simplex models) .................................................................................... 194
Figure 3-8 Internal assemblies (duplex models) ..................................................................................... 196
Figure 3-9 PCAs ............................................................................................................................... 198
Figure 3-10 250-sheet paper feeder (optional Tray 3) ........................................................................... 200
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1 Removal and replacement
Removal and replacement strategy
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Service approach
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Removal and replacement procedures
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ENWW 1
Removal and replacement strategy
This chapter describes the removal and replacement of field-replaceable units (FRUs) only.
Replacing FRUs is generally the reverse of removal procedures. Occasionally, notes and tips are
included to provide directions for difficult or critical replacement procedures.
not
HP does
Note the length, diameter, color, type, and location of each screw. Be sure to return each screw to its
original location during reassembly.
Incorrectly routed or loose wire harnesses can interfere with other internal components and can become
damaged or broken. Frayed or pinched harness wires can be difficult to find. When replacing wire
harnesses, always use the provided wire loops, lance points, or wire-harness guides.
Introduction
This chapter describes the removal and replacement of field-replaceable units (FRUs) only.
Replacing FRUs is generally the reverse of removal. Occasionally, notes and tips are included to
provide directions for difficult or critical replacement procedures.
HP does
support repairing individual subassemblies or troubleshooting to the component level.
not
support repairing individual subassemblies or troubleshooting to the component level.
Note the length, diameter, color, type, and location of each screw. Be sure to return each screw to its
original location during reassembly.
Incorrectly routed or loose wire harnesses can interfere with other internal components and can become
damaged or broken. Frayed or pinched harness wires can be difficult to find. When replacing wire
harnesses, always use the provided wire loops, lance points, or wire-harness guides and retainers.
Removal and replacement strategy
WARNING! Turn the product off, wait 5 seconds, and then remove the power cord before attempting
to service the product. If this warning is not followed, severe injury can result, in addition to damage to
the product. The power must be on for certain functional checks during troubleshooting. However,
disconnect the power supply during parts removal.
Never operate or service the product with the protective cover removed from the laser/scanner
assembly. The reflected beam, although invisible, can damage your eyes.
The sheet-metal parts can have sharp edges. Be careful when handling sheet-metal parts.
CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do
not straighten pre-folds in the FFCs. You
an FFC into a connector can cause a short circuit in a PCA.
NOTE: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread
pattern, and then carefully turn it clockwise to tighten. Do not overtighten. If a self-tapping screw-hole
becomes stripped, repair the screw-hole or replace the affected assembly.
must
fully seat all FFCs in their connectors. Failure to fully seat
2 Chapter 1 Removal and replacement ENWW
TIP: For clarity, some photos in this chapter show components removed that would not be removed to
service the product. If necessary, remove the components listed at the beginning of a procedure before
proceeding to service the product.
Electrostatic discharge
CAUTION: Some parts are sensitive to electrostatic discharge (ESD). Look for the ESD reminder
when removing product parts. Always perform service work at an ESD-protected workstation or mat, or
use an ESD strap. If an ESD workstation, mat, or strap is not available, ground yourself by touching the
sheet-metal chassis
Protect the ESD-sensitive parts by placing them in ESD pouches when they are out of the product.
before
touching an ESD-sensitive part.
ENWW
Removal and replacement strategy
3
Required tools
#2 Phillips screwdriver with a magnetic tip and a 152-mm (6-inch) shaft length
●
Precision, slotted screwdriver with a 1 mm (0.04 in) blade width
●
NOTE: This fine-point tool is required to release the front-door pins. The width of the blade must
be 2 mm (0.08 in) or less to be able to push the door pins out of the mounting holes.
Small, slotted screwdriver
●
Needle-nose pliers
●
ESD mat (if one is available)
●
Penlight (optional)
●
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 Phillips and pozidrive screwdriver comparison
4 Chapter 1 Removal and replacement ENWW
Types of screws
12 mm
WARNING! Make sure that components are replaced with the correct screw type. Using the incorrect
screw (for example, substituting a long screw for the correct shorter screw) can cause damage to the
product or interfere with product operation. Do not intermix screws that are removed from one
component with the screws that are removed from another component.
NOTE: The screw illustrations in the following table are for reference only. Screws might vary in size
and appearance from those shown in this table.
Table 1-1 Common fasteners
Example Description Size Part Number
Screw, with washer M3X8
M4X6
M4X12
Screw, tapping, truss head M4X10
M4X15
Screw, TP M3X4
M3X6
Screw, D M3X6
M3X8
Screw, machine
Screw, machine, flat head
Screw, machine, flanged pan
head
M3X4
M3X4
M3X6
12 mm
XA9-1420-000CN
XB2-7400-605CN
XA9-1422-000CN
XB4-7401-005CN
XB4-7401-609CN
XB6-7300-405CN
XB6-7300-605CN
XA9-1670-000CN
XA9-1671-000CN
XB6-7300-409CN
XA9-0679-000CN
XB6-7300-805CN
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Removal and replacement strategy
5
Service approach
Before performing service
Remove all media from the product.
●
Turn off the power using the power button.
●
Unplug the power cable and interface cable or cables.
●
Place the product on an ESD mat (if available). If an ESD workstation or mat is not available,
●
ground yourself by touching the sheet-metal chassis
Remove the toner cartridges.
●
Remove the Tray 2 cassette.
●
After performing service
Connect the interface cables, and then plug in the power cable.
●
Reinstall the toner cartridges.
●
Reinstall the Tray 2 cassette.
●
before
touching an ESD-sensitive part.
Post-service test
After service has been completed, perform the following test to verify that the repair or replacement
was successful.
Print-quality test
1. Verify that you have completed the necessary reassembly steps.
2. Make sure that the input tray contains clean, unmarked paper.
3. Attach the power cord and interface cable, and then turn on the product.
4. Verify that the expected startup sounds occur.
5. Print a configuration page, and then verify that the expected printing sounds occur.
6. Use the control-panel menus to calibrate the product.
7. Print a diagnostic page, and then verify that the print quality is as expected.
8. Send a print job from the host computer, and then verify that the output meets expectations.
9. If necessary, restore any customer-specified settings.
10. Clean the outside of the product with a damp cloth.
6 Chapter 1 Removal and replacement ENWW
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