LaserJet Pro 400
LASERJET PRO 300 COLOR MFP
LASERJET PRO 400 COLOR MFP
Service Manual
M375
M475
HP LaserJet Pro 300 color MFP M375
and HP LaserJet Pro 400 color MFP
M475 Printers
Service Manual
Copyright and License
© 2012 Copyright Hewlett-Packard
Development Company, L.P.
Reproduction, adaptation, or translation
without prior written permission is
prohibited, except as allowed under the
copyright laws.
The information contained herein is subject
to change without notice.
The only warranties for HP products and
services are set forth in the express warranty
statements accompanying such products and
services. Nothing herein should be
construed as constituting an additional
warranty. HP shall not be liable for technical
or editorial errors or omissions contained
herein.
Part number: CE863-90966
Edition 1, 1/2012
Trademark Credits
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.
ENWW iii
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 ........................................................................................................... 3
Types of screws ........................................................................................................ 4
Service approach ..................................................................................................................... 5
Before performing service .......................................................................................... 5
After performing service ............................................................................................. 5
Post-service tests ........................................................................................................ 6
Test 1 (print-quality test) ............................................................................... 6
Test 2 (copy-quality test) .............................................................................. 6
Test 3 (fax-quality test; fax models only) ........................................................ 6
Parts removal order ................................................................................................... 7
Removal and replacement procedures ........................................................................................ 9
Rollers and pads ....................................................................................................... 9
Transfer roller ............................................................................................ 9
Pickup roller (Tray 2 and Tray 3) ................................................................ 10
Separation roller (Trays 2 or 3) .................................................................. 13
Reinstall the separation roller ...................................................... 15
Document feeder pickup roller assembly ..................................................... 16
Pickup roller and separation pad (Tray 1) ................................................... 17
Main assemblies ..................................................................................................... 20
Print-cartridge drawer ............................................................................... 20
DIMM cover ............................................................................................ 22
Right cover .............................................................................................. 23
Document feeder input tray ........................................................................ 25
Scanner assembly .................................................................................... 26
Right-front cover and power button ............................................................. 28
Rear-upper cover (duplex product) .............................................................. 30
Paper-feed guide assembly ........................................................................ 31
ENWW v
Rear-door stopper and link caps (simplex product) ........................................ 32
Rear door (simplex product) ....................................................................... 33
Rear door (duplex product) ........................................................................ 35
Rear cover and feed guide (simplex product) ............................................... 37
Remove the rear cover and feed guide (simplex product) ................ 37
Rear-lower cover and rear-door links (duplex product) ................................... 41
Remove the rear-lower cover and rear-door links (duplex product) ... 41
Rear-door rib assembly (duplex product) ..................................................... 45
Remove the rear-door rib assembly (duplex product) ...................... 45
Link guide ............................................................................................... 47
Control panel and right-arm mount ............................................................. 48
Reinstall the control panel and right-arm mount ............................. 49
Upper-cover assembly ............................................................................... 51
Remove the upper-cover assembly ............................................... 51
Reinstall the upper-cover assembly ............................................... 53
Left cover ................................................................................................ 55
Remove the left cover ................................................................. 55
Reinstall the left cover ................................................................ 57
Front-door assembly ................................................................................. 58
Remove the front-door assembly .................................................. 58
Reinstall the front-door assembly .................................................. 63
Intermediate transfer belt (ITB) .................................................................... 65
Reinstall the ITB ......................................................................... 68
Drum motor (M1) and developer motor (M2) ............................................... 69
Reinstall the drum motor (M1) and developer motor (M2) ............... 74
Intermediate PCA ..................................................................................... 75
Formatter PCA and fax PCA ...................................................................... 76
Remove the formatter PCA and fax PCA ....................................... 76
Wireless PCA .......................................................................................... 79
DC controller PCA .................................................................................... 80
Remove the DC controller PCA .................................................... 81
Fuser-motor assembly ................................................................................ 83
Remove the fuser-motor assembly ................................................ 83
Reinstall the fuser-motor assembly ................................................ 86
High-voltage power-supply PCA ................................................................. 87
Remove the high-voltage power-supply PCA .................................. 87
Color-misregistration sensor assembly ......................................................... 90
Remove the color-misregistration sensor assembly .......................... 90
Reinstall the color-misregistration sensor assembly ......................... 92
Fan (FM1) ............................................................................................... 94
USB PCA (fax/memory-card models) .......................................................... 96
vi ENWW
Remove the USB PCA ................................................................ 96
Duplex-reverse drive assembly ................................................................... 97
Remove the duplex-reverse drive assembly .................................... 97
Fuser .................................................................................................... 100
Remove the fuser ..................................................................... 101
Reinstall the fuser .................................................................... 106
Paper-delivery assembly .......................................................................... 107
Remove the paper-delivery assembly .......................................... 107
Tray cassettes and optional Tray 3 assembly ............................................................ 110
2 Solve problems ............................................................................................................................... 111
Solve problems checklist ....................................................................................................... 112
Menu map .......................................................................................................................... 113
Troubleshooting process ........................................................................................................ 114
Pretroubleshooting checklist .................................................................................... 114
Power-on checks ................................................................................................... 115
Troubleshooting tools ............................................................................................................ 116
Component diagnostics .......................................................................................... 116
LED diagnostics ...................................................................................... 116
Network LEDs (network models only) ......................................... 116
Control panel LEDs .................................................................. 116
Memory card LED (memory-card models only) ............................. 116
Component tests ................................................................................................... 117
Control-panel tests .................................................................................. 117
Diagrams ............................................................................................................. 118
Plug/jack locations ................................................................................. 118
Location of connectors ............................................................................ 119
DC controller PCA ................................................................... 119
Location of major components ................................................................. 121
Major components .................................................................. 121
Motors and fans ...................................................................... 123
Rollers .................................................................................... 124
PCAs ..................................................................................... 125
Optional 250-sheet cassette ..................................................... 126
General timing diagram .......................................................................... 127
General circuit diagram .......................................................................... 128
CPU/ASIC diagrams .............................................................................. 129
HVT/Toner EMP diagram ........................................................................ 131
Driver PCA diagram ............................................................................... 132
Duplexer PCA diagram ........................................................................... 133
FSR diagram .......................................................................................... 134
ENWW vii
Internal print quality test pages ............................................................................... 135
Print quality troubleshooting page ............................................................ 135
Print quality assessment page .................................................................. 135
Print the Configuration Page .................................................................... 135
Service page ......................................................................................... 135
Clean the paper path ............................................................................. 136
Print-quality troubleshooting tools ............................................................................ 136
Repetitive image defects .......................................................................... 136
Calibrate the product .............................................................................. 137
Control panel menus .............................................................................................. 137
Setup Menu ........................................................................................... 137
HP Web Services menu ............................................................ 138
Reports menu .......................................................................... 139
Quick Forms menu .................................................................. 140
Fax Setup menu ...................................................................... 141
System Setup menu .................................................................. 144
Service menu .......................................................................... 149
Network Setup menu ............................................................... 151
Function specific menus ........................................................................... 152
Copy menu ............................................................................ 152
Fax menu ............................................................................... 154
Scan menu ............................................................................. 156
USB Flash Drive ...................................................................... 157
Interpret control panel messages ............................................................................. 157
Control panel message types ................................................................... 157
Control panel messages .......................................................................... 157
10.100X Supply Memory Error ................................................. 157
49 Error, Turn off then on ......................................................... 158
50.x Fuser Error ...................................................................... 158
52 Scanner Error .................................................................... 158
57 Fan Error, Turn off then on ................................................... 159
79 Error Turn off then on .......................................................... 159
Black Cartridge Low ................................................................ 159
Black in wrong position ............................................................ 160
Black Very Low ....................................................................... 160
Canceled scan. Clear document ................................................ 160
Canceled send. Clear document ............................................... 160
Communication error. .............................................................. 161
Cyan Cartridge Low ................................................................ 161
Cyan in wrong position ............................................................ 161
Cyan Very Low ....................................................................... 161
viii ENWW
Device error, press OK ............................................................ 162
Device is busy. Try again later .................................................. 162
Document feeder door is open. ................................................. 162
Document feeder jam. Clear and reload. ................................... 162
Document feeder mispick. Reload .............................................. 163
Door open .............................................................................. 163
Engine Communication Error .................................................... 163
Engine error. Press OK to continue. ........................................... 163
Fax is busy. Canceled send. ..................................................... 164
Fax is busy. Redial pending. ..................................................... 164
Fax receive error. .................................................................... 164
Fax Send error. ....................................................................... 165
Fax storage is full. Canceling the fax receive. ............................. 165
Fax storage is full. Canceling the fax send. ................................. 166
Fit to Page on flatbed only ........................................................ 166
Genuine HP supply installed ..................................................... 166
Incompatible <color> ............................................................... 166
Install [color] cartridge ............................................................. 166
Invalid driver Press OK ............................................................ 167
Invalid entry ........................................................................... 167
Jam in (area), Open door and clear jam .................................... 167
Jam in Tray 1, Clear jam and then press OK .............................. 167
Load paper ............................................................................ 167
Load Tray 1 <TYPE> <SIZE>, Press OK to use available media ..... 167
Load Tray 1, <PLAIN> <SIZE> / Cleaning mode, OK to start ....... 168
Load tray <X> Press [OK] for available media ............................ 168
Magenta Cartridge Low ........................................................... 168
Magenta in wrong position ...................................................... 168
Magenta Very Low .................................................................. 168
Manual Duplex Load Tray 1, Press OK ...................................... 169
Manual feed <SIZE> <TYPE>, Press OK to use available media .... 169
Memory is low. Press OK. ........................................................ 169
Memory is low. Try again later ................................................. 169
Memory low Only 1 copy made. Press OK to continue. ............... 170
Misprint, Press OK ................................................................... 170
No dial tone. .......................................................................... 170
No fax answer. Canceled send. ................................................ 170
No fax answer. Redial pending. ............................................... 171
No fax detected. ..................................................................... 171
Print failure, press OK. If error repeats, turn off then on. ............... 172
Remove shipping lock from <color> cartridge ............................. 172
ENWW ix
Remove shipping locks from cartridges ...................................... 172
Replace [color] ....................................................................... 172
Scanner error #, Turn off then on .............................................. 172
Scanner reserved for PC scan ................................................... 173
Scanning error Cannot connect ................................................. 173
Settings cleared ...................................................................... 173
Unexpected size in tray # Load <size> Press [OK] ...................... 173
Unsupported <color> Press [OK] to continue ............................... 174
Used <color> in use ................................................................ 174
Used [color] installed, to accept press OK .................................. 174
Used supplies in use ................................................................ 174
Yellow Cartridge Low .............................................................. 174
Yellow in wrong position .......................................................... 175
Yellow Very Low ..................................................................... 175
Event-log messages ............................................................................................... 175
Print the event log ................................................................................... 176
Event log messages ................................................................................ 176
Clear jams .......................................................................................................................... 180
Common causes of jams ........................................................................................ 180
Jam locations ........................................................................................................ 180
Clear jams from the document feeder ...................................................................... 181
Clear jams in Tray 1 .............................................................................................. 183
Clear jams in Tray 2 .............................................................................................. 186
Clear jams in the fuser area ................................................................................... 187
Clear jams in the output bin .................................................................................... 188
Clear jams in the duplexer (duplexing models only) ................................................... 189
Solve paper-handling problems .............................................................................................. 191
The product picks up multiple sheets of paper ........................................................... 191
The product does not pick up paper ........................................................................ 191
Solve image-quality problems ................................................................................................ 192
Print quality examples ............................................................................................ 192
Color image defects .............................................................................................. 196
Clean the product ................................................................................................................ 198
Clean the pickup and separation rollers ................................................................... 198
Clean the paper path ............................................................................................ 198
Clean the paper path from the product control panel .................................. 198
Clean the scanner glass strip and platen .................................................................. 199
Clean the document feeder pickup rollers and separation pad .................................... 200
Clean the touch screen .......................................................................................... 201
Solve performance problems ................................................................................................. 202
Factors affecting print performance ......................................................................... 202
x ENWW
Print speeds ........................................................................................... 203
The product does not print or it prints slowly ............................................................. 204
The product does not print ....................................................................... 204
The product prints slowly ......................................................................... 205
Solve product connectivity problems ....................................................................................... 206
Solve direct-connect problems ................................................................................. 206
Solve network problems ......................................................................................... 206
Poor physical connection ......................................................................... 206
The computer is using the incorrect IP address for the product ...................... 206
The computer is unable to communicate with the product ............................ 207
The product is using incorrect link and duplex settings for the network .......... 207
New software programs might be causing compatibility problems ................ 207
The computer or workstation might be set up incorrectly .............................. 207
The product is disabled, or other network settings are incorrect .................... 207
Solve wireless network problems ............................................................................. 207
Wireless connectivity checklist ................................................................. 208
The control panel displays the message: The wireless feature on this product
has been turned off ................................................................................ 208
The product does not print after the wireless configuration completes ............ 208
The product does not print, and the computer has a third-party firewall
installed ................................................................................................ 209
The wireless connection does not work after moving the wireless router or
product ................................................................................................. 209
Cannot connect more computers to the wireless product .............................. 209
The wireless product loses communication when connected to a VPN ........... 210
The network does not appear in the wireless networks list ........................... 210
The wireless network is not functioning ...................................................... 210
Service mode functions ......................................................................................................... 211
Service menu ........................................................................................................ 211
Service menu settings .............................................................................. 211
Secondary service menu ........................................................................................ 211
Open the secondary service menu ............................................................ 212
Secondary service menu structure ............................................................. 212
Product resets ....................................................................................................... 213
Restore the factory-set defaults ................................................................. 213
NVRAM initialization .............................................................................. 213
Solve fax problems ............................................................................................................... 215
Fax troubleshooting checklist .................................................................................. 215
Fax error messages ............................................................................................... 217
Communication error. ............................................................................. 217
Document feeder door is open. Canceled fax. ........................................... 217
ENWW xi
Fax is busy. Canceled send. .................................................................... 217
Fax is busy. Redial pending. .................................................................... 218
Fax receive error. ................................................................................... 218
Fax Send error. ...................................................................................... 219
Fax storage is full. Canceling the fax receive. ............................................ 219
Fax storage is full. Canceling the fax receive. ............................................ 219
Fax storage is full. Canceling the fax send. ................................................ 220
No dial tone. ......................................................................................... 220
No fax answer. Canceled send. ............................................................... 220
No fax answer. Redial pending. .............................................................. 221
No fax detected. .................................................................................... 221
Troubleshoot fax codes and trace reports ................................................................. 223
View and interpret fax error codes ........................................................... 223
Fax trace report ..................................................................................... 224
Fax logs and reports .............................................................................................. 224
Print all fax reports ................................................................................. 225
Print individual fax reports ....................................................................... 225
Set the fax error report ............................................................................ 226
Change error correction and fax speed ................................................................... 226
Set the fax-error-correction mode .............................................................. 226
Change the fax speed ............................................................................ 227
Solve problems sending faxes ................................................................................. 227
An error message displays on the control panel ......................................... 227
The Communication error. message displays .............................. 227
No dial tone. .......................................................................... 228
The Fax is busy. message displays ............................................ 229
The No fax answer. message displays ....................................... 229
Document feeder paper jam ..................................................... 230
The Fax storage is full. message displays ................................... 230
Scanner error ......................................................................... 230
The control panel displays a Ready message with no attempt to send the fax . 230
The control panel displays the message "Storing page 1" and does not
progress beyond that message ................................................................. 231
Faxes can be received, but not sent .......................................................... 231
Unable to use fax functions from the control panel ...................................... 231
Unable to use speed dials ....................................................................... 232
Unable to use group dials ....................................................................... 232
Receive a recorded error message from the phone company when trying to
send a fax ............................................................................................. 232
Unable to send a fax when a phone is connected to the product .................. 233
Solve problems receiving faxes ............................................................................... 234
xii ENWW
The fax does not respond ........................................................................ 234
The fax has a dedicated phone line ........................................... 234
An answering machine is connected to the product ..................... 234
A telephone handset is connected to the product ......................... 235
The Answer Mode setting is set to the Manual setting ................... 235
Voice mail is available on the fax line ........................................ 235
The product is connected to a DSL phone service ........................ 236
The product uses a fax over IP or VoIP phone service ................... 236
An error message displays on the control panel ......................................... 237
The No fax detected. message displays ..................................... 237
The Communication error. message displays .............................. 237
The Fax storage is full. message displays ................................... 238
The Fax is busy. message displays ............................................ 238
A fax is received but does not print .......................................................... 239
The Private Receive feature is on ............................................... 239
Sender receives a busy signal .................................................................. 239
A handset is connected to the product ........................................ 239
A phone line splitter is being used ............................................. 239
No dial tone .......................................................................................... 239
Cannot send or receive a fax on a PBX line ............................................... 239
Solve general fax problems .................................................................................... 240
Faxes are sending slowly ........................................................................ 240
Fax quality is poor ................................................................................. 241
Fax cuts off or prints on two pages ........................................................... 241
Product updates ................................................................................................................... 243
3 Parts and diagrams ......................................................................................................................... 245
Order parts by authorized service providers ............................................................................ 246
Orderable parts .................................................................................................... 246
Whole unit replacement ......................................................................................... 246
Related documentation and software ....................................................................... 247
Supplies and accessories ....................................................................................... 248
Service parts ........................................................................................................ 248
How to use the parts lists and diagrams .................................................................................. 249
Scanner and document feeder main assemblies ....................................................................... 250
Covers ................................................................................................................................ 252
Internal assemblies ............................................................................................................... 254
Internal assemblies (1 of 5) ..................................................................................... 254
Internal assemblies (2 of 5) ..................................................................................... 256
Internal components (3 of 5) ................................................................................... 258
Internal assemblies (4 of 5) ..................................................................................... 260
ENWW xiii
Internal assemblies (5 of 5) ..................................................................................... 262
Internal assemblies (simplex models) ........................................................................ 264
Internal assemblies (duplex models) ......................................................................... 266
PCAs ................................................................................................................... 268
Input device(s) ..................................................................................................................... 270
250-sheet paper feeder (optional Tray 3) ................................................................. 270
Alphabetical parts list ........................................................................................................... 272
Numerical parts list .............................................................................................................. 275
Appendix A Service and support ......................................................................................................... 279
Hewlett-Packard limited warranty statement ............................................................................. 280
HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement .................. 282
Data stored on the print cartridge ........................................................................................... 283
End User License Agreement .................................................................................................. 284
OpenSSL ............................................................................................................................. 287
Customer support ................................................................................................................. 288
Appendix B Product specifications ........................................................................................................ 289
Physical specifications .......................................................................................................... 290
Power consumption, electrical specifications, and acoustic emissions .......................................... 290
Environmental specifications .................................................................................................. 290
Appendix C Regulatory information ...................................................................................................... 291
FCC regulations ................................................................................................................... 292
Environmental product stewardship program ........................................................................... 292
Protecting the environment ...................................................................................... 292
Ozone production ................................................................................................. 292
Power consumption ............................................................................................... 292
Toner consumption ................................................................................................ 293
Paper use ............................................................................................................. 293
Plastics ................................................................................................................. 293
HP LaserJet print supplies ....................................................................................... 293
Return and recycling instructions ............................................................................. 293
United States and Puerto Rico .................................................................. 293
Multiple returns (more than one cartridge) .................................. 294
Single returns .......................................................................... 294
Shipping ................................................................................ 294
Non-U.S. returns .................................................................................... 294
Paper .................................................................................................................. 295
Material restrictions ............................................................................................... 295
xiv ENWW
Disposal of waste equipment by users in private households in the European Union ...... 295
Chemical substances ............................................................................................. 296
Material Safety Data Sheet (MSDS) ......................................................................... 296
For more information ............................................................................................. 297
Declaration of conformity ...................................................................................................... 298
Declaration of conformity (wireless models) ............................................................................. 300
Certificate of volatility ........................................................................................................... 302
Types of memory ................................................................................................... 302
Volatile memory ..................................................................................... 302
Non-volatile memory .............................................................................. 302
Safety statements ................................................................................................................. 303
Laser safety .......................................................................................................... 303
Canadian DOC regulations .................................................................................... 303
VCCI statement (Japan) .......................................................................................... 303
Power cord instructions .......................................................................................... 303
Power cord statement (Japan) ................................................................................. 303
EMC statement (Korea) .......................................................................................... 304
Laser statement for Finland ..................................................................................... 304
GS statement (Germany) ........................................................................................ 305
Substances Table (China) ....................................................................................... 305
Restriction on Hazardous Substances statement (Turkey) ............................................. 305
Restriction on Hazardous Substances statement (Ukraine) ........................................... 305
Additional statements for telecom (fax) products ....................................................................... 306
EU Statement for Telecom Operation ....................................................................... 306
New Zealand Telecom Statements ........................................................................... 306
Additional FCC statement for telecom products (US) .................................................. 306
Telephone Consumer Protection Act (US) .................................................................. 307
Industry Canada CS-03 requirements ...................................................................... 307
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............. 308
Additional statements for wireless products .............................................................................. 309
FCC compliance statement—United States ................................................................ 309
Australia statement ................................................................................................ 309
Brazil ANATEL statement ........................................................................................ 309
Canadian statements ............................................................................................. 309
European Union regulatory notice ........................................................................... 309
Notice for use in France ......................................................................................... 310
Notice for use in Russia ......................................................................................... 310
Korean statement .................................................................................................. 310
Taiwan statement .................................................................................................. 311
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............. 311
ENWW xv
Index ................................................................................................................................................. 313
xvi ENWW
List of tables
Table 1-1 Common fasteners ................................................................................................................. 4
Table 2-1 Major components ............................................................................................................. 121
Table 2-2 Solenoid, sensors, and motors .............................................................................................. 123
Table 2-3 Rollers ............................................................................................................................... 124
Table 2-4 PCAs ................................................................................................................................ 125
Table 2-5 Optional 250-sheet cassette ................................................................................................. 126
Table 2-6 Repetitive image defects ...................................................................................................... 136
Table 2-7 Event-log messages ............................................................................................................. 176
Table 2-8 Event-log-only messages ...................................................................................................... 178
Table 2-9 Secondary service menu ...................................................................................................... 212
Table 3-1 Order parts, accessories, and supplies .................................................................................. 246
Table 3-2 Pro 300 Color MFP M375nw .............................................................................................. 246
Table 3-3 Pro 400 Color MFP M475dn ............................................................................................... 246
Table 3-4 Pro 400 Color M475dw ..................................................................................................... 246
Table 3-5 Related documentation and software .................................................................................... 247
Table 3-6 Scanner and document feeder main assemblies ..................................................................... 251
Table 3-7 Covers
1,2
........................................................................................................................... 253
Table 3-8 Internal assemblies (1 of 7) .................................................................................................. 255
Table 3-9 Internal assemblies (2 of 7) .................................................................................................. 257
Table 3-10 Internal assemblies (3 of 7) ................................................................................................ 259
Table 3-11 Internal assemblies (4 of 7) ................................................................................................ 261
Table 3-12 Internal assemblies (5 of 7) ................................................................................................ 263
Table 3-13 Internal assemblies (simplex models) ................................................................................... 265
Table 3-14 Internal assemblies (duplex models) .................................................................................... 267
Table 3-15 PCAs .............................................................................................................................. 269
Table 3-16 250-sheet paper feeder (optional Tray 3) ............................................................................ 271
Table 3-17 Alphabetical parts list ....................................................................................................... 272
Table 3-18 Numerical parts list ........................................................................................................... 275
Table B-1 Physical specifications ......................................................................................................... 290
Table B-2 Environmental specifications
1
............................................................................................... 290
ENWW xvii
xviii ENWW
List of figures
Figure 1-1 Phillips and pozidrive screwdriver comparison .......................................................................... 3
Figure 1-2 Parts removal order (1 of 2) .................................................................................................... 7
Figure 1-3 Parts removal order (2 of 2) .................................................................................................... 8
Figure 1-4 Remove the pickup roller (1 of 2) ........................................................................................... 11
Figure 1-5 Remove the pickup roller (2 of 2) ........................................................................................... 12
Figure 1-6 Remove the pickup roller (1 of 3) ........................................................................................... 13
Figure 1-7 Remove the separation roller (2 of 3) ..................................................................................... 14
Figure 1-8 Remove the separation roller (3 of 3) ..................................................................................... 14
Figure 1-9 Reinstall the separation roller ................................................................................................ 15
Figure 1-10 Remove the document feeder pickup roller assembly (1 of 2) .................................................. 16
Figure 1-11 Remove the document feeder pickup roller assembly (2 of 2) .................................................. 16
Figure 1-12 Remove the Tray 1 pickup roller (1 of 3) .............................................................................. 18
Figure 1-13 Remove the Tray 1 pickup roller (2 of 3) .............................................................................. 18
Figure 1-14 Remove the Tray 1 pickup roller (3 of 3) .............................................................................. 19
Figure 1-15 Remove the Tray 1 separation pad ...................................................................................... 19
Figure 1-16 Remove the print-cartridge drawer (1 of 3) ........................................................................... 20
Figure 1-17 Remove the print-cartridge drawer (2 of 3) ........................................................................... 20
Figure 1-18 Remove the print-cartridge drawer (3 of 3) ........................................................................... 21
Figure 1-19 Remove the DIMM cover .................................................................................................... 22
Figure 1-20 Remove the right cover (1 of 3) ........................................................................................... 23
Figure 1-21 Remove the right cover (2 of 3) ........................................................................................... 23
Figure 1-22 Remove the right cover (3 of 3) ........................................................................................... 24
Figure 1-23 Remove the document feeder input tray (2 of 2) .................................................................... 25
Figure 1-24 Remove the document feeder input tray (2 of 2) .................................................................... 25
Figure 1-25 Remove the scanner assembly (1 of 4) ................................................................................. 26
Figure 1-26 Remove the scanner assembly (2 of 4) ................................................................................. 26
Figure 1-27 Remove the scanner assembly (3 of 4) ................................................................................. 27
Figure 1-28 Remove
the scanner assembly (4 of 4) ................................................................................. 27
Figure 1-29 Remove the rear-upper cover (1 of 2) ................................................................................... 30
Figure 1-30 Remove the rear-upper cover (2 of 2) ................................................................................... 30
Figure 1-31 Remove the feed assembly (1 of 2) ...................................................................................... 31
Figure 1-32 Remove the feed assembly (2 of 2) ...................................................................................... 31
ENWW xix
Figure 1-33 Remove the Rear-door stopper and link caps (simplex product) (1 of 2) .................................... 32
Figure 1-34 Remove the Rear-door stopper and link cap (simplex product) (2 of 2) ..................................... 32
Figure 1-35 Remove the rear door (simplex product) (1 of 4) .................................................................... 33
Figure 1-36 Remove the rear door (simplex product) (2 of 4) .................................................................... 33
Figure 1-37 Remove the rear door (simplex product) (3 of 4) .................................................................... 34
Figure 1-38 Remove the rear door (simplex product) (4 of 4) .................................................................... 34
Figure 1-39 Remove the rear door (duplex product) (1 of 4) ..................................................................... 35
Figure 1-40 Remove the rear door (duplex product) (2 of 4) ..................................................................... 35
Figure 1-41 Remove the rear door (duplex product) (3 of 4) ..................................................................... 36
Figure 1-42 Remove the rear door (duplex product) (4 of 4) ..................................................................... 36
Figure 1-43 Remove the rear cover and feed guide (simplex product) (1 of 6) ............................................ 37
Figure 1-44 Remove the rear cover and feed guide (simplex product) (2 of 6) ............................................ 38
Figure 1-45 Remove the rear cover and feed guide (simplex product) (3 of 6) ............................................ 38
Figure 1-46 Remove the rear cover and feed guide (simplex product) (4 of 6) ............................................ 39
Figure 1-47 Remove the rear cover and feed guide (simplex product) (5 of 6) ............................................ 40
Figure 1-48 Remove the rear cover and feed guide (simplex product) (6 of 6) ............................................ 40
Figure 1-49 Remove the rear- lower cover and rear-door links (duplex product) (1 of 6) ............................... 41
Figure 1-50 Remove the rear-lower cover and rear-door links (duplex product) (2 of 6) ................................ 42
Figure 1-51 Remove the rear-lower cover and rear-door links (duplex product) (3 of 6) ................................ 42
Figure 1-52 Remove the rear-lower cover and link-guides (duplex product) (4 of 6) ..................................... 43
Figure 1-53 Remove the rear-lower cover and link-guides (duplex product) (5 of 6) ..................................... 43
Figure 1-54 Remove the rear-lower cover and rear-door links (duplex product) (6 of 6) ................................ 44
Figure 1-55 Remove the rear-door rib assembly (duplex product) (1 of 3) .................................................. 45
Figure 1-56 Remove the rear-door rib assembly (duplex product) (2 of 3) .................................................. 46
Figure 1-57 Remove the rear-door rib assembly (duplex product) (3 of 3) .................................................. 46
Figure 1-58 Replace the link guide (simplex products) ............................................................................. 47
Figure 1-59 Replace the link guide (duplex products) .............................................................................. 47
Figure 1-60 Remove the control panel and right-arm mount (1 of 3) .......................................................... 48
Figure 1-61 Remove the control panel and right-arm mount (2 of 3) .......................................................... 48
Figure 1-62 Remove the control panel and right-arm mount (3 of 3) .......................................................... 49
Figure 1-63 Reinstall the control
panel and right-arm mount (1 of 2) .......................................................... 49
Figure 1-64 Reinstall the control panel and right-arm mount (2 of 2) .......................................................... 50
Figure 1-65 Remove the upper-cover assembly (1 of 3) ............................................................................ 51
Figure 1-66 Remove the upper-cover assembly (2 of 3) ............................................................................ 52
Figure 1-67 Remove the upper-cover assembly (3 of 3) ............................................................................ 52
Figure 1-68 Reinstall the upper-cover assembly (1 of 3) ........................................................................... 53
Figure 1-69 Reinstall the upper-cover assembly (2 of 3) ........................................................................... 53
Figure 1-70 Reinstall the upper-cover assembly (3 of 3) ........................................................................... 54
Figure 1-71 Remove the left cover (1 of 3) ............................................................................................. 55
Figure 1-72 Remove the left cover (2 of 3) ............................................................................................. 56
Figure 1-73 Remove the left cover (3 of 3) ............................................................................................. 56
xx ENWW
Figure 1-74 Reinstall the left cover (1 of 2) ............................................................................................. 57
Figure 1-75 Reinstall the left cover (2 of 2) ............................................................................................. 57
Figure 1-76 Remove the front-door assembly (1 of 10) ............................................................................. 58
Figure 1-77 Remove the front-door assembly (2 of 10) ............................................................................. 59
Figure 1-78 Remove the front-door assembly (3 of 10) ............................................................................. 59
Figure 1-79 Remove the front-door assembly (4 of 10) ............................................................................. 60
Figure 1-80 Remove the front-door assembly (5 of 10) ............................................................................. 60
Figure 1-81 Remove the front-door assembly (6 of 10) ............................................................................. 61
Figure 1-82 Remove the front-door assembly (7 of 10) ............................................................................. 61
Figure 1-83 Remove the front-door assembly (8 of 10) ............................................................................. 62
Figure 1-84 Remove the front-door assembly (9 of 10) ............................................................................. 62
Figure 1-85 Remove the front-door assembly (10 of 10) ........................................................................... 63
Figure 1-86 Reinstall the front-door assembly (1 of 2) .............................................................................. 63
Figure 1-87 Reinstall the front-door assembly (2 of 2) .............................................................................. 64
Figure 1-88 Remove the ITB (1 of 6) ...................................................................................................... 65
Figure 1-89 Remove the ITB (2 of 6) ...................................................................................................... 65
Figure 1-90 Remove the ITB (3 of 6) ...................................................................................................... 66
Figure 1-91 Remove the ITB (4 of 6) ...................................................................................................... 66
Figure 1-92 Remove the ITB (5 of 6) ...................................................................................................... 67
Figure 1-93 Remove the ITB (6 of 6) ...................................................................................................... 67
Figure 1-94 Reinstall the ITB ................................................................................................................. 68
Figure 1-95 Remove motor M1 and motor M2 (1 of 6) ............................................................................ 69
Figure 1-96 Remove motor M1 and motor M2 (2 of 6) ............................................................................ 70
Figure 1-97 Remove motor M1 and motor M2 (3 of 6) ............................................................................ 71
Figure 1-98 Remove motor M1 and motor M2 (4 of 6) ............................................................................ 72
Figure 1-99 Remove motor M1 and motor M2 (5 of 6) ............................................................................ 72
Figure 1-100 Remove motor M1 and motor M2 (6 of 6) .......................................................................... 73
Figure 1-101 Reinstall the motor M1 and motor M2 wire-harness retainer .................................................. 74
Figure 1-102 Remove
the Intermediate PCA (1 of 2) ................................................................................ 75
Figure 1-103 Remove the Intermediate PCA (2 of 2) ................................................................................ 75
Figure 1-104 Remove the formatter (1 of 4; base model) ......................................................................... 77
Figure 1-105 Remove the formatter (2 of 4; fax model) ............................................................................ 77
Figure 1-106 Remove the formatter (3 of 4; base model) ......................................................................... 78
Figure 1-107 Remove the formatter (4 of 4; fax model) ............................................................................ 78
Figure 1-108 Remove the wirelss PCA (1 of 2) ....................................................................................... 79
Figure 1-109 Remove the wirelss PCA (2 of 2) ....................................................................................... 79
Figure 1-110 Remove the DC controller PCA (1 of 2) .............................................................................. 81
Figure 1-111 Remove the DC controller PCA (2 of 2) .............................................................................. 82
Figure 1-112 Remove the fuser-motor assembly (1 of 6) ........................................................................... 83
Figure 1-113 Remove the fuser-motor assembly (2 of 6) ........................................................................... 84
Figure 1-114 Remove the fuser-motor assembly (3 of 6) ........................................................................... 84
ENWW xxi
Figure 1-115 Remove the fuser-motor assembly (4 of 6) ........................................................................... 85
Figure 1-116 Remove the fuser-motor assembly (5 of 6) ........................................................................... 85
Figure 1-117 Remove the fuser-motor assembly (6 of 6) ........................................................................... 86
Figure 1-118 Reinstall the fuser-motor assembly ...................................................................................... 86
Figure 1-119 Remove the high-voltage power-supply PCA (1 of 5) ............................................................ 87
Figure 1-120 Remove the high-voltage power-supply PCA (2 of 5) ............................................................ 88
Figure 1-121 Remove the high-voltage power-supply PCA (3 of 5) ............................................................ 88
Figure 1-122 Remove the high-voltage power-supply PCA (4 of 5) ............................................................ 89
Figure 1-123 Remove the high-voltage power-supply PCA (5 of 5) ............................................................ 89
Figure 1-124 Remove the color-misregistration sensor assembly PCA (1 of 4) ............................................. 90
Figure 1-125 Remove the color-misregistration sensor assembly PCA (2 of 4) ............................................. 91
Figure 1-126 Remove the color-misregistration sensor assembly PCA (3 of 4) ............................................. 91
Figure 1-127 Remove the color-misregistration sensor assembly PCA (4 of 4) ............................................. 92
Figure 1-128 Reinstall the color-misregistration sensor assembly PCA (1 of 2) ............................................. 92
Figure 1-129 Reinstall the color-misregistration sensor assembly PCA (2 of 2) ............................................. 93
Figure 1-130 Remove the fan (FM1) (1 of 2) .......................................................................................... 94
Figure 1-131 Remove the fan (FM1) (2 of 2) .......................................................................................... 95
Figure 1-132 Remove the USB PCA (fax/memory-card models) ................................................................ 96
Figure 1-133 Remove the duplex-reverse drive assembly (1 of 4) .............................................................. 97
Figure 1-134 Remove the duplex-reverse drive assembly (2 of 4) .............................................................. 98
Figure 1-135 Remove the duplex-reverse drive assembly (3 of 4) .............................................................. 98
Figure 1-136 Remove the duplex-reverse drive assembly (4 of 4) .............................................................. 99
Figure 1-137 Remove the fuser (1 of 8) ............................................................................................... 101
Figure 1-138 Remove the fuser (2 of 8) ............................................................................................... 102
Figure 1-139 Remove the fuser (3 of 8) ............................................................................................... 102
Figure 1-140 Remove the fuser (4 of 8) ............................................................................................... 103
Figure 1-141 Remove the fuser (5 of 8) ............................................................................................... 103
Figure 1-142 Remove the fuser (6 of 8) ............................................................................................... 104
Figure 1-143 Remove the fuser (7 of 8) ............................................................................................... 104
Figure 1-144 Remove the fuser (8 of 8) ............................................................................................... 105
Figure 1-145 Reinstall the fuser ........................................................................................................... 106
Figure 1-146 Remove the paper-delivery assembly (1 of 4) .................................................................... 107
Figure 1-147 Remove the paper-delivery assembly (2 of 4) .................................................................... 108
Figure 1-148 R
emove the paper-delivery assembly (3 of 4) .................................................................... 108
Figure 1-149 Remove the paper-delivery assembly (4 of 4) .................................................................... 109
Figure 1-150 Remove the tray cassettes and optional Tray 3 assembly (1 of 2) ......................................... 110
Figure 1-151 Remove the tray cassettes and optional Tray 3 assembly (2 of 2) ......................................... 110
Figure 2-1 Control-panel test .............................................................................................................. 117
Figure 2-2 DC controller connectors .................................................................................................... 119
Figure 2-3 Major components ............................................................................................................ 121
Figure 2-4 Motors and fans ................................................................................................................ 123
xxii ENWW
Figure 2-5 Rollers .............................................................................................................................. 124
Figure 2-6 PCAs ............................................................................................................................... 125
Figure 2-7 Optional 250-sheet cassette ................................................................................................ 126
Figure 2-8 Timing diagram ................................................................................................................. 127
Figure 2-9 Circuit diagram ................................................................................................................. 128
Figure 2-10 CPU diagram ................................................................................................................. 129
Figure 2-11 ASIC diagram ................................................................................................................. 130
Figure 2-12 HVT/Toner EMP diagram ................................................................................................. 131
Figure 2-13 Driver PCA diagram ........................................................................................................ 132
Figure 2-14 Duplexer PCA diagram .................................................................................................... 133
Figure 2-15 FSR diagram ................................................................................................................... 134
Figure 2-16 Control-panel test ............................................................................................................ 175
Figure 2-17 Control-panel test ............................................................................................................ 211
Figure 3-1 Scanner and document feeder main assemblies .................................................................... 250
Figure 3-2 External panels and covers ................................................................................................. 252
Figure 3-3 Internal assemblies (1 of 7) ................................................................................................. 254
Figure 3-4 Internal assemblies (2 of 2) ................................................................................................. 256
Figure 3-5 Internal assemblies (3 of 7) ................................................................................................. 258
Figure 3-6 Internal assemblies (4 of 7) ................................................................................................. 260
Figure 3-7 Internal assemblies (5 of 7) ................................................................................................. 262
Figure 3-8 Internal assemblies (simplex models) .................................................................................... 264
Figure 3-9 Internal assemblies (duplex models) ..................................................................................... 266
Figure 3-10 PCAs ............................................................................................................................. 268
Figure 3-11 250-sheet paper feeder (optional Tray 3) ........................................................................... 270
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xxiv ENWW
1 Removal and replacement
●
Removal and replacement strategy
●
Service approach
●
Removal and replacement procedures
ENWW 1
Removal and replacement strategy
This chapter discusses 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
not
support repairing individual subassemblies or problem solving at 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 locate. 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
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
must
fully seat all FFCs in their connectors. Failure to fully seat
an FFC into a connector can cause a short circuit in a PCA.
NOTE: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread
pattern, and then carefully turn it clockwise to tighten. Do not overtighten. If a self-tapping screw-hole
becomes stripped, repair the screw-hole or replace the affected assembly.
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
before
touching an ESD-sensitive part.
Protect the ESD-sensitive parts by placing them in ESD pouches when they are out of the product.
Required tools
●
Number 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 drive the door pins out of the mounting holes.
●
Small, slotted screwdriver
●
Needle-nose pliers
●
Snap-ring 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
ENWW
Removal and replacement strategy
3
Types of screws
WARNING! Make sure that components are replaced with the correct screw type. Using the incorrect
screw (for example, substituting a long screw for the correct shorter screw) can cause damage to the
product or interfere with product operation. Do not intermix screws that are removed from one
component by using 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
XA9-1420-000CN
XB2-7400-605CN
XA9-1422-000CN
Screw, tapping, truss head M4X10
M4X15
XB4-7401-005CN
XB4-7401-609CN
Screw, TP M3X4
M3X6
XB6-7300-405CN
XB6-7300-605CN
Screw, D M3X6
M3X8
XA9-1670-000CN
XA9-1671-000CN
Screw, machine
Screw, machine, flat head
Screw, machine, flanged pan
head
M3X4
M3X4
M3X6
XB6-7300-409CN
XA9-0679-000CN
XB6-7300-805CN
12 mm
12 mm
4 Chapter 1 Removal and replacement ENWW
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