HP LaserJet Enterprise 500 Service Manual
LASERJET ENTERPRISE 500 COLOR
Service Manual
M551n M551dn M551xh
HP LaserJet Enterprise 500 color M551
Printers
Service Manual
Copyright and License
© 2011 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: CF079-90942
Edition 1, 10/2011
Trademark Credits
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 Theory of operation .......................................................................................................... 1
Basic operation ........................................................................................................................ 2
Sequence of operation ............................................................................................... 3
Engine control system ............................................................................................................... 4
DC controller ............................................................................................................ 5
Solenoids .................................................................................................. 6
Clutches .................................................................................................... 6
Switches ................................................................................................... 6
Sensors ..................................................................................................... 7
Motors and fans ......................................................................................... 7
High voltage power supply ...................................................................................... 10
Low voltage power supply ........................................................................................ 12
Overcurrent/overvoltage protection ............................................................ 14
Safety ..................................................................................................... 14
Sleep (powersave) mode ........................................................................... 14
Power supply voltage detection .................................................................. 14
Low voltage power supply failure ............................................................... 14
Power off condition .................................................................................. 15
Fuser control ........................................................................................................... 15
Fuser temperature control circuit ................................................................. 16
Fuser over temperature protection ............................................................... 17
Fuser failure detection ............................................................................... 18
Laser/scanner system ............................................................................................................. 19
Image formation system .......................................................................................................... 21
Image formation process .......................................................................................... 22
Step 1: Pre-exposure ................................................................................. 23
Step 2: Primary charging .......................................................................... 23
Step 3: Laser-beam exposure ..................................................................... 24
Step 4: Development ................................................................................ 24
Step 5: Primary transfer ............................................................................ 25
Step 6: Secondary transfer ........................................................................ 25
Step 7: Separation ................................................................................... 26
ENWW v
Step 8: Fusing ......................................................................................... 26
Step 9: ITB cleaning ................................................................................. 27
Step 10: Drum cleaning ............................................................................ 27
Print cartridge ......................................................................................................... 27
Developing roller engagement and disengagement ..................................................... 29
Intermediate transfer belt (ITB) unit ............................................................................. 31
Primary-transfer-roller engagement and disengagement ................................. 32
ITB cleaning ............................................................................................ 35
Calibration ............................................................................................................. 36
Color misregistration control ...................................................................... 36
Image stabilization control ........................................................................ 37
Pickup, feed, and delivery system ............................................................................................. 38
Pickup-and-feed unit ................................................................................................ 42
Cassette pickup ........................................................................................ 43
Cassette presence detection ........................................................ 44
Cassette lift operation ................................................................ 45
Cassette paper presence detection .............................................. 46
Cassette media width detection ................................................... 47
Multifeed prevention .................................................................. 48
Multipurpose tray pickup ........................................................................... 49
Paper feed .............................................................................................. 50
Skew-feed prevention ................................................................. 51
OHT detection .......................................................................... 52
Fusing and delivery unit ........................................................................................... 52
Loop control ............................................................................................ 53
Pressure-roller pressurization control ........................................................... 54
Duplexing unit (duplex models) ................................................................................. 55
Duplexing reverse and feed control ............................................................ 56
Duplex pickup operation ........................................................................... 56
Jam detection ........................................................................................................................ 57
Optional paper feeder ............................................................................................................ 59
Paper-feeder pickup and feed operation .................................................................... 61
Paper size detection and cassette presence detection .................................................. 62
Paper feeder cassette lift operation ............................................................................ 64
Paper feeder presence detection ............................................................................... 66
Paper-feeder multiple feed prevention ........................................................................ 67
Paper feeder jam detection ....................................................................................... 68
2 Removal and replacement .............................................................................................. 69
Introduction ..........................................................................
................................................. 70
Removal and replacement strategy ........................................................................................... 70
vi ENWW
Cautions during removal and replacement ................................................................. 70
Electrostatic discharge ............................................................................................. 71
Required tools ......................................................................................................... 72
Service approach ................................................................................................................... 73
Before performing service ........................................................................................ 73
After performing service ........................................................................................... 73
Post service test ....................................................................................................... 73
Print-quality test ........................................................................................ 73
Parts removal order ................................................................................................. 74
Customer self repair (CSR) components ..................................................................................... 76
Print cartridges ........................................................................................................ 76
Duplex reverse guide ............................................................................................... 78
Toner collection unit ................................................................................................ 79
Formatter PCA ........................................................................................................ 81
Disk drives ............................................................................................................. 82
Remove the HDD ...................................................................................... 82
Remove the SSM ...................................................................................... 84
Install a replacement hard drive ................................................................. 85
Reload the firmware .................................................................. 85
Tray cassette .......................................................................................................... 86
Fuser ..................................................................................................................... 87
Pickup roller (Tray 1) ............................................................................................... 88
Pickup roller (Tray 2) ............................................................................................... 89
Pickup and feed rollers (Tray 3) ................................................................................ 91
Separation roller (Tray 2) ......................................................................................... 93
Secondary transfer roller .......................................................................................... 94
Reinstall the transfer roller ......................................................................... 95
Secondary transfer assembly .................................................................................... 96
Reinstall the secondary transfer assembly .................................................... 97
Intermediate transfer belt (ITB) ................................................................................... 98
Right door (optional paper feeder) .......................................................................... 100
Covers ................................................................................................................................ 102
Identification and location ...................................................................................... 102
Front door assembly .............................................................................................. 103
Right door assembly ..............................................................................................
105
Right rear cover .................................................................................................... 109
Left cover ............................................................................................................. 111
Remove the left cover .............................................................................. 111
Left bottom cover ................................................................................................... 113
Remove the left bottom cover ................................................................... 113
Left bottom handle ................................................................................................. 114
ENWW vii
Remove the left bottom handle ................................................................. 114
Hardware integration pocket (HIP) (dn and xh models only) ....................................... 115
Control panel assembly ......................................................................................... 116
Right front cover .................................................................................................... 118
Remove the right front cover .................................................................... 118
Reinstall the power button ........................................................ 121
Front top cover ..................................................................................................... 122
Remove the front top cover ...................................................................... 122
Rear cover and upper rear cover ............................................................................ 124
Remove the rear cover and upper rear cover ............................................. 124
Rear top cover ...................................................................................................... 127
Remove the rear top cover ....................................................................... 127
Right bottom handle .............................................................................................. 129
Remove the right bottom handle ............................................................... 129
Rear bottom handle ............................................................................................... 130
Remove the rear bottom handle ................................................................ 130
Internal assemblies ............................................................................................................... 131
Delivery fan, cartridge fan, and environmental sensor ................................................ 131
Remove the delivery fan, cartridge fan, and environmental sensor ................ 131
Toner collection sensor ........................................................................................... 136
Remove the toner collection sensor ........................................................... 136
Residual toner feed motor ....................................................................................... 138
Remove the residual toner feed motor ....................................................... 138
Reinstall the residual toner collection door .................................. 142
Registration density (RD) sensor assembly ................................................................. 143
Remove the RD sensor assembly ............................................................... 143
Power supply fan and fan duct ................................................................................ 147
Remove the power supply fan and fan duct ............................................... 147
Registration assembly ............................................................................................ 150
Remove the registration assembly ............................................................. 150
Lower pickup guide ............................................................................................... 155
Remove the lower pickup guide ............................................................... 155
Reinstall the lower pickup guide ............................................................... 157
Interconnect board (ICB) ........................................................................................ 158
Remove the ICB ...................................................................................... 158
DC controller PCA and tray .................................................................................... 160
Remove the DC controller PCA ................................................................. 160
Low voltage power supply ...................................................................................... 163
Remove the lo
w voltage power supply ...................................................... 163
High voltage power supply lower (HVPS-D) .............................................................. 167
Remove the high voltage power supply lower ............................................ 167
viii ENWW
Reinstall the high voltage power supply lower ............................. 169
Developing disengagement motor ........................................................................... 170
Remove the developing disengagement motor ........................................... 170
Pickup motor ........................................................................................................ 172
Remove the pickup motor ........................................................................ 172
Lifter drive assembly .............................................................................................. 173
Remove the lifter drive assembly ............................................................... 173
Automatic close assembly ....................................................................................... 175
Remove the automatic close assembly ....................................................... 175
Cassette pickup drive assembly ............................................................................... 176
Remove the cassette pickup drive assembly ............................................... 176
Reinstall the cassette pickup drive assembly ................................ 181
Cassette pickup assembly ....................................................................................... 183
Remove the cassette pickup assembly ....................................................... 184
Laser/scanner assembly (Y/M) ............................................................................... 186
Remove the laser/scanner assembly (Y/M) ................................................ 186
Laser/scanner assembly (C/Bk) .............................................................................. 193
Remove the laser/scanner assembly (C/Bk) ............................................... 194
Reinstall the protective glass cleaner (PGC) actuators ................... 198
High voltage power supply upper (HVPS-T) .............................................................. 201
Remove the high voltage power supply upper ............................................ 202
Reinstall the high voltage power supply upper ............................ 205
Drum motor 1 ....................................................................................................... 206
Remove the drum motor 1 ....................................................................... 207
Drum motor 2 or drum motor 3 ............................................................................... 208
Remove the drum motor 2 or drum motor 3 ............................................... 209
Fuser motor .......................................................................................................... 210
Remove the fuser motor ........................................................................... 211
Main drive assembly ............................................................................................. 212
Remove the main drive assembly .............................................................. 213
Reinstall the main drive assembly .............................................. 217
Fuser drive assembly ............................................................................................. 223
Remove the fuser drive assembly .............................................................. 224
Reinstall the fuser drive assembly ............................................... 22
7
Delivery assembly ................................................................................................. 228
Remove the delivery assembly .................................................................. 229
Reinstall the delivery assembly .................................................. 232
Duplex drive assembly ........................................................................................... 233
Remove the duplex drive assembly ........................................................... 234
Optional paper feeder assembly (Tray 3) ................................................................................ 235
Drawer connector ................................................................................................. 235
ENWW ix
3 Solve problems ............................................................................................................. 237
Solve problems checklist ....................................................................................................... 238
Menu map .......................................................................................................................... 240
Current settings pages .......................................................................................................... 241
Preboot menu options ........................................................................................................... 242
Troubleshooting process ........................................................................................................ 243
Determine the problem source ................................................................................. 243
Troubleshooting flowchart ....................................................................... 243
Power subsystem ................................................................................................... 244
Power-on checks .................................................................................... 244
Power-on troubleshooting overview ............................................ 244
Tools for troubleshooting ....................................................................................................... 246
Individual component diagnostics ............................................................................ 246
LED diagnostics ...................................................................................... 246
Understand lights on the formatter ............................................. 246
Engine diagnostics ................................................................................. 254
Defeating interlocks ................................................................. 254
Disable cartridge check ........................................................... 256
Engine test button .................................................................... 257
Paper path test ....................................................................................... 258
Paper path sensors test ........................................................................... 258
Manual sensor test ................................................................................. 260
Registration sensor .................................................................. 261
Fuser loop sensors ................................................................... 262
Fuser output sensor .................................................................. 263
Duplexer refeed sensor ............................................................ 264
Output-bin full sensor ............................................................... 265
Fuser pressure-release sensor .................................................... 266
ITB alienation sensor ................................................................ 267
Right- and front-door interlock switches ....................................... 269
Tray/bin manual sensor test ..................................................... 271
Print/stop test ........................................................................................ 279
Component tests ..................................................................................... 280
Component test (
special-mode test) ............................................ 280
Diagrams ............................................................................................................. 282
Block diagrams ...................................................................................... 282
Location of connectors ............................................................................ 284
DC controller PCA ................................................................... 284
Paper feeder driver PCA .......................................................... 285
Plug/jack locations ................................................................................. 286
Locations of major components ................................................................ 286
x ENWW
Base product .......................................................................... 286
1 x 500 paper feeder .............................................................. 293
General timing chart ............................................................................... 294
Circuit diagrams .................................................................................... 295
Internal print-quality test pages ................................................................................ 297
Print quality troubleshooting pages ........................................................... 297
Print quality assessment page .................................................................. 300
Cleaning page ....................................................................................... 302
Set up an auto cleaning page ................................................... 302
Configuration page ................................................................................ 303
Configuration page ................................................................. 303
HP embedded Jetdirect page .................................................... 305
Finding important information on the configuration pages ............ 306
Color band test ...................................................................................... 307
Print quality troubleshooting tools ............................................................................ 308
Repetitive defects ruler ............................................................................ 308
Calibrate the product .............................................................................. 309
Control panel menus .............................................................................................. 310
Sign In menu ......................................................................................... 310
Retrieve Job From USB menu ................................................................... 311
Retrieve Job From Device Memory menu ................................................... 312
Supplies menu ....................................................................................... 316
Trays menu ............................................................................................ 324
Administration menu ............................................................................... 329
Reports menu .......................................................................... 329
General Settings menu ............................................................. 331
Retrieve From USB Settings menu .............................................. 349
General Print Settings menu ...................................................... 349
Default Print Options menu ....................................................... 352
Display Settings menu .............................................................. 355
Manage Supplies menu ........................................................... 356
Manage Trays menu ................................................................ 363
Network Settings menu ............................................................ 365
Troubleshooting menu ............................................................................. 382
Device Maintenance menu ...................................................................... 388
Backup
/Restore menu .............................................................. 388
Calibrate/Cleaning menu ........................................................ 388
USB Firmware Upgrade menu ................................................... 391
Interpret control panel messages, status-alert messages, and event code errors ............. 392
10.0X.Y0 Supply memory error ............................................................... 392
10.22.50 .............................................................................................. 393
ENWW xi
10.22.51 .............................................................................................. 393
10.22.52 .............................................................................................. 393
10.23.50 .............................................................................................. 393
10.23.51 .............................................................................................. 394
10.23.52 .............................................................................................. 394
10.23.60 .............................................................................................. 394
10.23.70 Printing past very low .............................................................. 394
10.XX.34 Used supply in use ................................................................... 395
10.XX.40 Genuine HP supplies installed ................................................... 395
10.XX.41 Unsupported supply in use ........................................................ 396
10.XX.70 Printing past very low ............................................................... 396
10.YY.15 Install <supply> ....................................................................... 397
10.YY.25 Wrong cartridge in <color> slot ................................................ 397
10.YY.35 Incompatible <supply> ............................................................. 398
11.00.YY Internal clock error .................................................................. 399
13.00.00 .............................................................................................. 399
13.A3.D3 ............................................................................................. 399
13.A3.FF .............................................................................................. 399
13.B2.9C ............................................................................................. 399
13.B2.A1 ............................................................................................. 400
13.B2.A2 ............................................................................................. 400
13.B2.A3 ............................................................................................. 400
13.B2.D1 .............................................................................................. 400
13.B2.D2 .............................................................................................. 400
13.B2.D3 .............................................................................................. 400
13.D3.DZ ............................................................................................. 401
13.WX.EE ............................................................................................. 401
13.WX.FF ............................................................................................. 401
13.WX.YZ Fuser area jam ...................................................................... 402
13.WX.YZ Fuser wrap jam ...................................................................... 403
13.WX.YZ Jam below control panel ......................................................... 404
13.WX.YZ Jam in middle right door ......................................................... 404
13.WX.YZ Jam in right door .................................................................... 405
13.WX.YZ Jam in Tray 1 ........................................................................ 40
5
13.WX.YZ Jam in Tray <X> ..................................................................... 406
20.00.00 Insufficient memory To continue, press OK .................................. 406
21.00.00 Page too complex ................................................................... 406
32.08.XX .............................................................................................. 407
32.1C.XX .............................................................................................. 407
32.21.00 .............................................................................................. 411
33.XX.YY .............................................................................................. 412
xii ENWW
33.XX.YY Used board/disk ..................................................................... 412
41.02.00 Error ...................................................................................... 412
41.03.YZ Unexpected size in tray <X> ..................................................... 413
41.05.YZ Unexpected type in tray <X> .................................................... 413
41.07.YZ Error To continue, press OK ...................................................... 415
42.XX.YY .............................................................................................. 417
47.00.XX .............................................................................................. 417
47.01.XX .............................................................................................. 417
47.02.XX .............................................................................................. 417
47.03.XX .............................................................................................. 418
47.04.XX .............................................................................................. 418
47.05.00 .............................................................................................. 418
47.06.XX .............................................................................................. 418
47.WX.YZ Printer calibration error To continue, press OK ........................... 418
49.XX.YY To continue, turn off then on ...................................................... 420
50.WX.YZ Fuser error To continue, turn off then on .................................... 421
51.00.YY Error ...................................................................................... 424
52.00.XX To continue, turn off then on ...................................................... 424
54.XX.YY Error ...................................................................................... 425
55.00.YY DC controller error To continue, turn off then on .......................... 427
55.0X.YY DC controller error To continue, turn off then on .......................... 427
56.00.YY Error To continue, turn off then on .............................................. 427
57.00.0Y Error To continue, turn off then on ............................................. 428
58.00.04 .............................................................................................. 428
59.00.YY Error To continue, turn off then on .............................................. 429
59.05.XX .............................................................................................. 429
60.00.0Y Tray <Y> lifting error ............................................................... 430
61.00.01 .............................................................................................. 431
62.00.00 No system To continue, turn off then on ...................................... 431
70.00.00 Error To continue, turn off then on ............................................. 431
81.0X.YY Embedded JetDirect error ......................................................... 432
98.00.01 Corrupt data in firmware volume ............................................... 432
98.00.02 Corrupt data in solutions volume ............................................... 433
98.00.03 Corrupt data in configuration volume ......................................... 433
98.00.04 Corrupt data in job data volume ............................................... 433
99.00.01 Upgrade not performed file is corrupt ........................................ 433
99.00.02 Upgrade not performed timeout during receive ........................... 434
99.00.03 Upgrade not performed error writing to disk ............................... 434
99.00.04 Upgrade not performed timeout during receive ........................... 434
99.00.05 Upgrade not performed timeout during receive ........................... 434
99.00.06 Upgrade not performed error reading upgrade ........................... 435
ENWW xiii
99.00.07 Upgrade not performed error reading upgrade ........................... 435
99.00.08 Upgrade not performed error reading upgrade ........................... 435
99.00.09 Upgrade canceled by user ....................................................... 435
99.00.10 Upgrade canceled by user ....................................................... 436
99.00.11 Upgrade canceled by user ....................................................... 436
99.00.12 Upgrade not performed the file is invalid ................................... 436
99.00.13 Upgrade not performed the file is invalid ................................... 436
99.00.14 Upgrade not performed the file is invalid ................................... 437
99.00.2X .............................................................................................. 437
99.09.60 Unsupported disk .................................................................... 438
99.09.61 Unsupported disk .................................................................... 438
99.09.62 Unknown disk ......................................................................... 438
99.09.63 Incorrect disk .......................................................................... 438
99.09.64 Disk malfunction ...................................................................... 438
99.09.65 Disk data error ........................................................................ 439
99.09.66 No disk data installed .............................................................. 439
99.09.67 Disk is not bootable please download firmware .......................... 439
99.XX.YY .............................................................................................. 439
99.XX.YY .............................................................................................. 440
<Binname> Full Remove all paper from bin ............................................... 440
<Supply> almost full ............................................................................... 440
<Supply> low OR Supplies low ................................................................ 440
<Supply> very low OR Supplies very low .................................................. 441
<Tray X> lifting ...................................................................................... 442
[File System] device failure To clear, press OK ........................................... 442
[File System] file operation failed To clear, press OK .................................. 442
[File System] file system is full To clear, press OK ....................................... 442
[File System] is not initialized ................................................................... 443
[File System] is write protected ................................................................. 443
Accept bad signature ............................................................................. 443
Bad optional tray connection ................................................................... 443
Calibration reset pending ........................................................................ 444
Canceling ............................................................................................. 444
Canceling... <jobname> ......................................................................... 444
Checking engine .................................................................................... 444
Checking paper path .............................................................................. 444
Cho
sen personality not available To continue, press OK ............................. 445
Cleaning do not grab paper .................................................................... 445
Cleaning... ............................................................................................ 445
Clearing event log .................................................................................. 445
Clearing paper path ............................................................................... 445
xiv ENWW
Close front door ..................................................................................... 446
Close lower right door ............................................................................ 446
Close upper right door ............................................................................ 446
Creating cleaning page .......................................................................... 446
Data received To print last page, press OK ............................................... 447
EIO <X> disk initializing ......................................................................... 447
Event log is empty .................................................................................. 447
Expected drive missing ........................................................................... 447
HP Secure Hard Drive disabled ................................................................ 447
Incompatible <supply> ............................................................................ 448
Incompatible supplies ............................................................................. 448
Install <supply> ...................................................................................... 449
Install <supply> Close rear door .............................................................. 449
Install Fuser Unit ..................................................................................... 449
Install supplies ....................................................................................... 450
Install Transfer Unit ................................................................................. 450
Internal disk not functional ....................................................................... 450
Internal disk spinning up ......................................................................... 451
Load Tray <X>: [Type], [Size] .................................................................. 451
Load Tray <X>: [Type], [Size] To use another tray, press OK ....................... 451
Manually feed output stack Then press OK to print second sides .................. 452
Manually feed: [Type], [Size] ................................................................... 452
Manually feed: [Type], [Size] To use another tray, press OK ....................... 452
Moving solenoid .................................................................................... 452
Moving solenoid and motor ..................................................................... 453
No job to cancel .................................................................................... 453
Paused .................................................................................................. 453
Performing Color Band Test... .................................................................. 453
Performing Paper Path Test... ................................................................... 453
Please wait... ......................................................................................... 454
Printing CMYK samples... ........................................................................ 454
Printing Color Usage Log... ..................................................................... 454
Printing Configuration... .......................................................................... 454
Printing Demo Page... ............................................................................. 454
Printing Diagnostics Page... ..................................................................... 454
Printing Engine Test... ............................................................................. 455
Printing Event Log... ................................................................................ 455
Printing File Directory... ........................................................................... 455
Printing Font List... .................................................................................. 455
Printing Fuser
Test Page... ....................................................................... 455
Printing Help Page... .............................................................................. 456
ENWW xv
Printing Menu Map... ............................................................................. 456
Printing PQ Troubleshooting... ................................................................. 456
Printing Registration Page... ..................................................................... 456
Printing RGB Samples... .......................................................................... 456
Printing stopped ..................................................................................... 456
Printing Supplies Status Page... ................................................................ 457
Printing Usage Page... ............................................................................ 457
Processing duplex job Do not grab paper until job completes ...................... 457
Processing job from tray <X>... Do not grab paper until job completes ......... 457
Processing... .......................................................................................... 457
Processing... copy <X> of <Y> ................................................................ 458
Ready ................................................................................................... 458
Ready <IP Address> ............................................................................... 458
Remove all print cartridges ...................................................................... 458
Remove at least one print cartridge .......................................................... 458
Remove shipping lock from Tray 2 ............................................................ 459
Replace <supply> .................................................................................. 459
Replace Supplies .................................................................................... 460
Restore Factory Settings .......................................................................... 461
Restricted from printing in color ................................................................ 461
Rotating <color> motor ........................................................................... 461
Rotating motor ....................................................................................... 461
Size mismatch in Tray <X> ...................................................................... 462
Sleep mode on ...................................................................................... 462
Supplies in wrong positions ..................................................................... 462
Tray <X> empty: [Type], [Size] ................................................................ 463
Tray <X> open ....................................................................................... 463
Tray <X> overfilled ................................................................................. 464
Troubleshooting ..................................................................................... 464
Type mismatch Tray <X> ......................................................................... 464
Unsupported drive installed To continue, press OK ..................................... 464
Unsupported supply in use OR Unsupported supply installed To continue,
press OK ............................................................................................... 465
Unsupported tray configuration ................................................................ 465
Unsupported USB accessory detected Remove USB accessory ...................... 465
USB accessory needs too much power Remove USB and turn off then on ...... 466
USB accessory not functional ................................................................... 46
6
Used supply installed To continue, press OK OR Used supply in use ............. 466
Wrong cartridge in <color> slot ............................................................... 467
Event log messages ............................................................................................... 468
Print an event log ................................................................................... 469
xvi ENWW
View an event log .................................................................................. 470
Clear an event log .................................................................................. 470
Clear jams .......................................................................................................................... 471
Common causes of jams ........................................................................................ 471
Jam locations ........................................................................................................ 472
Clear jams in Tray 1 .............................................................................................. 473
Clear jams in the output bin area ............................................................................ 475
Clear jams in Tray 2 .............................................................................................. 476
Clear jams in the right door .................................................................................... 477
Clear jams in the optional 500-sheet paper and heavy media tray (Tray 3) .................. 481
Clear jams in the lower right door (Tray 3) ............................................................... 482
Jam causes and solutions ....................................................................................... 483
Jams in the output bin ............................................................................. 483
Jams in the fuser and transfer area ........................................................... 483
Jams in the duplex area (duplex models) ................................................... 487
Jams in Tray 1, Tray 2 and internal paper path .......................................... 488
Jams in Tray 3 ....................................................................................... 490
Change jam recovery ............................................................................................ 491
Solve paper handling problems ............................................................................................. 492
Product feeds multiple sheets .................................................................................. 492
Paper does not feed automatically ........................................................................... 492
Use manual print modes ....................................................................................................... 494
Solve image quality problems ................................................................................................ 497
Image defects table ............................................................................................... 497
Clean the product ................................................................................................................ 503
Clean the paper path ............................................................................................ 503
Set up an auto cleaning page .................................................................. 503
Solve performance problems ................................................................................................. 504
Solve connectivity problems ................................................................................................... 505
Solve di
rect connect problems ................................................................................ 505
Solve network problems ......................................................................................... 505
Service mode functions ......................................................................................................... 507
Service menu ........................................................................................................ 507
Product resets ....................................................................................................... 509
Restore factory-set defaults ....................................................................... 509
Product cold reset ................................................................................... 510
Clean Disk and Partial Clean functions .................................................................... 510
Active and repository firmware locations ................................................... 510
Partial Clean ......................................................................................... 511
Execute a Partial Clean ............................................................ 511
Clean Disk ............................................................................................ 512
ENWW xvii
Execute a Clean Disk ............................................................... 512
Preboot menu options ........................................................................................................... 514
Product updates ................................................................................................................... 521
Determine the installed revision of firmware .............................................................. 521
Perform a firmware upgrade ................................................................................... 521
Embedded Web Server ........................................................................... 521
USB storage device (Preboot menu) .......................................................... 522
USB storage device (control-panel menu) ................................................... 523
4 Parts and diagrams ...................................................................................................... 525
Order parts, accessories, and supplies ................................................................................... 526
Part numbers ....................................................................................................................... 527
Accessories .......................................................................................................... 527
Print cartridges and toner collection unit ................................................................... 527
Memory ............................................................................................................... 527
Customer self repair (CSR) and service kits ............................................................... 528
Screws ................................................................................................................................ 530
How to use the parts lists and diagrams .................................................................................. 530
Covers ................................................................................................................................ 532
............................................................................................................................ 532
Right-door assembly ............................................................................................................. 534
Internal assemblies ............................................................................................................... 536
Internal assemblies (1 of 5) ..................................................................................... 536
Internal assemblies (2 of 5) ..................................................................................... 538
Internal assemblies (3 of 5) ..................................................................................... 540
Internal assemblies (4 of 5) ..................................................................................... 542
Internal assemblies (5 of 5) ..................................................................................... 544
Cassette ............................................................................................................... 546
Paper pickup assembly .......................................................................................... 548
PCAs ................................................................................................................... 550
Assessories .......................................................................................................................... 552
1 x 500-sheet paper feeder .................................................................................... 552
Paper feeder covers ............................................................................................... 554
Paper feed
er main body ........................................................................................ 556
Paper feeder cassette ............................................................................................. 558
Paper feeder PCA ................................................................................................. 560
Alphabetical parts list ........................................................................................................... 562
Numerical parts list .............................................................................................................. 568
Appendix A Service and support ..................................................................................... 575
Hewlett-Packard limited warranty statement ............................................................................. 576
xviii ENWW
HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement .................. 578
Color LaserJet Fuser Kit, Toner Collection Unit, and Transfer Kit Limited Warranty Statement .......... 579
Data stored on the print cartridge ........................................................................................... 580
End User License Agreement .................................................................................................. 581
OpenSSL ............................................................................................................................. 584
Customer self-repair warranty service ..................................................................................... 585
Customer support ................................................................................................................. 586
Appendix B Product specifications ................................................................................... 587
Physical specifications .......................................................................................................... 588
Power consumption, electrical specifications, and acoustic emissions .......................................... 588
Environmental specifications .................................................................................................. 588
Appendix C Regulatory information ................................................................................. 589
FCC regulations ................................................................................................................... 590
Environmental product stewardship program ........................................................................... 591
Protecting the environment ...................................................................................... 591
Ozone production ................................................................................................. 591
Power consumption ............................................................................................... 591
Paper use ............................................................................................................. 591
Plastics ................................................................................................................. 591
HP LaserJet print supplies ....................................................................................... 591
Return and recycling instructions ............................................................................. 592
United States and Puerto Rico .................................................................. 592
Multiple returns (more than one cartridge) .................................. 592
Single returns .......................................................................... 592
Shipping ................................................................................ 592
Non-U.S. returns .................................................................................... 593
Paper .................................................................................................................. 593
Material restrictions ............................................................................................... 593
Disposal of waste equipment by users in private households in the European Union ...... 594
Chemical substances ............................................................................................. 594
Material Safety Data Sheet (MSDS) ......................................................................... 594
For more information ............................................................................................. 594
Declaration of conformity ...................................................................................................... 5
95
Certificate of volatility ........................................................................................................... 597
Types of memory .............................
...................................................................... 597
Volatile memory ..................................................................................... 597
Non-volatile memory .............................................................................. 597
Mass Storage memory ............................................................................ 597
Safety statements ................................................................................................................. 598
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Laser safety .......................................................................................................... 598
Canadian DOC regulations .................................................................................... 598
VCCI statement (Japan) .......................................................................................... 598
Power cord instructions .......................................................................................... 598
Power cord statement (Japan) ................................................................................. 598
EMC statement (Korea) .......................................................................................... 599
Laser statement for Finland ..................................................................................... 599
GS statement (Germany) ........................................................................................ 600
Substances Table (China) ....................................................................................... 600
Restriction on Hazardous Substances statement (Turkey) ............................................. 600
Restriction on Hazardous Substances statement (Ukraine) ........................................... 600
Index ............................................................................................................................... 601
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List of tables
Table 1-1 Sequence of operation ............................................................................................................ 3
Table 1-2 Solenoids .............................................................................................................................. 6
Table 1-3 Clutches ................................................................................................................................ 6
Table 1-4 Switches ................................................................................................................................ 6
Table 1-5 Sensors ................................................................................................................................. 7
Table 1-6 Motors .................................................................................................................................. 8
Table 1-7 Fans ..................................................................................................................................... 9
Table 1-8 High voltage power supply circuits ......................................................................................... 10
Table 1-9 Converted DC voltages ......................................................................................................... 13
Table 1-10 Fuser components ............................................................................................................... 15
Table 1-11 Image formation process ..................................................................................................... 22
Table 1-12 Primary-transfer-roller engagement states ............................................................................... 32
Table 1-13 Image-stabilization controls .................................................................................................. 37
Table 1-14 Switches and sensors for the pickup, feed, and delivery system (1 of 2) .................................... 38
Table 1-15 Switches and sensors for the pickup, feed, and delivery system (2 of 2) .................................... 39
Table 1-16 Motors and solenoids for the pickup, feed, and delivery system ............................................... 40
Table 1-17 Jams that the product detects ............................................................................................... 57
Table 1-18 Electrical
components for the paper feeder ............................................................................ 60
Table 1-19 Paper size detection ........................................................................................................... 62
Table 3-1 Troubleshooting flowchart .................................................................................................... 243
Table 3-2 Heartbeat LED, product initialization ..................................................................................... 247
Table 3-3 Heartbeat LED, product operational ...................................................................................... 249
Table 3-4 Connectivity LED, product initialization .................................................................................. 251
Table 3-5 Connectivity LED, product operational ................................................................................... 253
Table 3-6 Paper-path sensors diagnostic tests ....................................................................................... 259
Table 3-7 Manual sensor diagnostic tests ............................................................................................. 260
Table 3-8 Manual sensor test 2 diagnostic tests .................................................................................... 271
Table 3-9 Component test details ........................................................................................................ 280
Table 3-10 Sensors ........................................................................................................................... 282
Table 3-11 DC controller connectors ................................................................................................... 284
Table 3-12 Paper feeder driver PCA connectors ................................................................................... 285
Table 3-13 PCAs, motors, fans, switches, solenoids, and clutches ........................................................... 291
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Table 3-14 Important information on the configuration pages ................................................................. 306
Table 3-15 Sign In menu .................................................................................................................. 310
Table 3-16 Retrieve Job From USB menu ....................................................................................... 311
Table 3-17 Retrieve Job From Device Memory menu ................................................................... 312
Table 3-18 Supplies menu ............................................................................................................... 316
Table 3-19 Trays menu .................................................................................................................... 324
Table 3-20 Reports menu ................................................................................................................ 329
Table 3-21 General Settings menu ................................................................................................. 331
Table 3-22 Retrieve From USB Settings menu ............................................................................... 349
Table 3-23 General Print Settings menu .......................................................................................... 349
Table 3-24 Default Print Options menu .......................................................................................... 352
Table 3-25 Display Settings menu .................................................................................................. 355
Table 3-26 Manage Supplies menu ................................................................................................ 356
Table 3-27 Manage Trays menu ..................................................................................................... 363
Table 3-28 Network Settings menu ................................................................................................ 365
Table 3-29 Jetdirect Menu ............................................................................................................. 365
Table 3-30 Troubleshooting menu .................................................................................................. 382
Table 3-31 Backup/Restore menu .................................................................................................. 388
Table 3-32 Calibrate/Cleaning menu ............................................................................................. 388
Table 3-33 Causes and so
lutions for delivery delay jam ........................................................................ 483
Table 3-34 Causes and solutions for fuser delivery delay jams ............................................................... 483
Table 3-35 Causes and solutions for wrapping jams ............................................................................. 484
Table 3-36 Causes and solutions for fuser delivery stationary jams .......................................................... 484
Table 3-37 Causes and solutions for residual media jams ...................................................................... 484
Table 3-38 Causes and solutions for pickup delay jams 2 ...................................................................... 485
Table 3-39 Causes and solutions for pickup stationary jams ................................................................... 486
Table 3-40 Causes and solutions for duplexing reverse jams .................................................................. 487
Table 3-41 Causes and solutions for duplex repick jams ........................................................................ 487
Table 3-42 Causes and solutions for residual media jams ...................................................................... 488
Table 3-43 Causes and solutions for pickup delay jam 1: tray pickup ..................................................... 488
Table 3-44 Causes and solutions for pickup stationary jams ................................................................... 489
Table 3-45 Causes and solutions for pickup delay jam 1; MP tray pickup ................................................ 489
Table 3-46 Causes and solutions for pickup delay and pickup stationary jams ......................................... 490
Table 3-47 Print modes under the Adjust Paper Types sub menu ....................................................... 494
Table 3-48 MP modes under the Optimize submenu ........................................................................... 49
5
Table 3-49 Image defects table .......................................................................................................... 497
Table 3-50 Solve performance problems .............................................................................................. 504
Table 3-51 Preboot menu options (1 of 5) ............................................................................................ 514
Table 3-52 Preboot menu options (2 of 5) ............................................................................................ 516
Table 3-53 Preboot menu options (3 of 5) ............................................................................................ 517
Table 3-54 Preboot menu options (4 of 5) ............................................................................................ 518
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Table 3-55 Preboot menu options (5 of 5) ............................................................................................ 519
Table 3-56 Preboot menu options (5 of 5) ............................................................................................ 520
Table 4-1 Common fasteners ............................................................................................................. 530
Table 4-2 External covers, panels, and doors ....................................................................................... 533
Table 4-3 Right-door assembly ............................................................................................................ 535
Table 4-4 Internal assemblies (1 of 5) .................................................................................................. 537
Table 4-5 Internal assemblies (2 of 5) .................................................................................................. 539
Table 4-6 Internal assemblies (3 of 5) .................................................................................................. 541
Table 4-7 Internal assemblies (4 of 5) .................................................................................................. 543
Table 4-8 Internal assemblies (5 of 5) .................................................................................................. 545
Table 4-9 Cassette ............................................................................................................................ 547
Table 4-10 Paper pickup assembly ..................................................................................................... 549
Table 4-11 PCAs .............................................................................................................................. 551
Table 4-12 1 x 500-sheet paper feeder ............................................................................................... 553
Table 4-13 Paper feeder covers .......................................................................................................... 555
Table 4-14 Paper feeder main body .................................................................................................... 557
Table 4-15 Cassette .......................................................................................................................... 559
Table 4-16 Paper feeder PCA ............................................................................................................ 561
Table 4-17 Alphabetical parts list ....................................................................................................... 562
Table 4-18 Numerical parts list ........................................................................................................... 568
Table B-1 Product dimensions
............................................................................................................. 588
Table B-2 Product dimensions, with all doors and trays fully opened ....................................................... 588
ENWW xxiii
xxiv ENWW
List of figures
Figure 1-1 Relationship between the main product systems ......................................................................... 2
Figure 1-2 Engine control system ............................................................................................................. 4
Figure 1-3 DC controller block diagram ................................................................................................... 5
Figure 1-4 High voltage power supply circuits ........................................................................................ 10
Figure 1-5 Low voltage power-supply circuit ........................................................................................... 12
Figure 1-6 Fuser components ................................................................................................................ 15
Figure 1-7 Fuser temperature control circuit ............................................................................................ 16
Figure 1-8 Laser/scanner system ........................................................................................................... 19
Figure 1-9 Image formation system ........................................................................................................ 21
Figure 1-10 Image formation process .................................................................................................... 22
Figure 1-11 Pre-exposure ..................................................................................................................... 23
Figure 1-12 Primary charging ............................................................................................................... 23
Figure 1-13 Laser-beam exposure ......................................................................................................... 24
Figure 1-14 Development ..................................................................................................................... 24
Figure 1-15 Primary transfer ................................................................................................................. 25
Figure 1-16 Secondary transfer ............................................................................................................ 25
Figure 1-17 Separation ....................................................................................................................... 26
Figure 1-18 Fusing .............................................................................................................................. 26
Figure 1-19 ITB cleaning ...................................................................................................................... 27
Figure 1-20 Drum cleaning .................................................................................................................. 27
Figure 1-21 Print-cartridge system ............................................................
............................................. 28
Figure 1-22 Developing-roller engagement and disengagement control ..................................................... 29
Figure 1-23 ITB unit ............................................................................................................................. 31
Figure 1-24 Three states of primary-transfer-roller engagement and disengagement ..................................... 33
Figure 1-25 ITB cleaning process .......................................................................................................... 35
Figure 1-26 Toner patterns for calibration .............................................................................................. 36
Figure 1-27 Switches and sensors for the pickup, feed, and delivery system (1 of 2) ................................... 38
Figure 1-28 Switches and sensors for the pickup, feed, and delivery system (2 of 2) ................................... 39
Figure 1-29 Motors and solenoids for the pickup, feed, and delivery system .............................................. 40
Figure 1-30 Three main units of the pickup, feed, and delivery system ....................................................... 41
Figure 1-31 Pick feed mechanism ......................................................................................................... 42
Figure 1-32 Cassette-pickup mechanism ................................................................................................ 43
ENWW xxv
Figure 1-33 Cassette presence sensor .................................................................................................... 44
Figure 1-34 Cassette lift mechanism ...................................................................................................... 45
Figure 1-35 Paper level detection mechanism ......................................................................................... 46
Figure 1-36 Cassette media width detection ........................................................................................... 47
Figure 1-37 Multifeed prevention .......................................................................................................... 48
Figure 1-38 Multipurpose tray pickup mechanism ................................................................................... 49
Figure 1-39 Paper-feed mechanism ....................................................................................................... 50
Figure 1-40 Skew-feed prevention ......................................................................................................... 51
Figure 1-41 Fuser and delivery unit ....................................................................................................... 52
Figure 1-42 Loop-control mechanism ..................................................................................................... 53
Figure 1-43 Pressure-roller pressurization control .................................................................................... 54
Figure 1-44 Duplexing unit ................................................................................................................... 55
Figure 1-45 Jam detection sensors ........................................................................................................ 57
Figure 1-46 Optional paper feeder ....................................................................................................... 59
Figure 1-47 Signals for the paper feeder ............................................................................................... 60
Figure 1-48 Paper-feeder pickup and feed operation ............................................................................... 61
Figure 1-49 Paper size detection .......................................................................................................... 62
Figure 1-50 Paper-feeder cassette lift ..................................................................................................... 64
Figure 1-51 Paper-
feeder multiple feed prevention .................................................................................. 67
Figure 1-52 Jam detection .................................................................................................................... 68
Figure 2-1 Phillips and pozidrive screwdriver comparison ........................................................................ 72
Figure 2-2 Parts removal order (1 of 2) .................................................................................................. 74
Figure 2-3 Parts removal order (2 of 2) .................................................................................................. 75
Figure 2-4 Remove the print cartridge (1 of 2) ........................................................................................ 76
Figure 2-5 Remove the print cartridge (2 of 2) ........................................................................................ 77
Figure 2-6 Remove the duplex reverse guide (1 of 2) ............................................................................... 78
Figure 2-7 Remove the duplex reverse guide (2 of 2) ............................................................................... 78
Figure 2-8 Remove the toner collection unit (1 of 4) ................................................................................. 79
Figure 2-9 Remove the toner collection unit (2 of 4) ................................................................................. 79
Figure 2-10 Remove the toner collection unit (3 of 4) ............................................................................... 80
Figure 2-11 Remove the toner collection unit (4 of 4) ............................................................................... 80
Figure 2-12 Remove the formatter ......................................................................................................... 81
Figure 2-13 Remove the HDD (1 of 2) ................................................................................................... 82
Figure 2-14 Remove the HDD (2 of 2) ................................................................................................... 83
Figure 2-15 Remove the SSM (1 of 2) .................................................................................................... 84
Figure 2-16 Remove the SSM (2 of 2) .................................................................................................... 84
Figure 2-17 Remove the tray cassette (1 of 2) ......................................................................................... 86
Figure 2-18 Remove the tray cassette (2 of 2) ......................................................................................... 86
Figure 2-19 Remove the fuser (
1 of 2) ................................................................................................... 87
Figure 2-20 Remove the fuser (2 of 2) ................................................................................................... 87
Figure 2-21 Remove the pickup roller (Tray 1; 1 of 2) ............................................................................. 88
xxvi ENWW
Figure 2-22 Remove the pickup roller (Tray 1; 2 of 2) ............................................................................. 88
Figure 2-23 Remove the pickup roller (Tray 2; 1 of 4) ............................................................................. 89
Figure 2-24 Remove the pickup roller (Tray 2; 2 of 4) ............................................................................. 89
Figure 2-25 Remove the pickup roller (Tray 2; 3 of 4) ............................................................................. 90
Figure 2-26 Remove the pickup roller (Tray 2; 4 of 4) ............................................................................. 90
Figure 2-27 Remove the Pickup and feed rollers (Tray 3; 1 of 2) ............................................................... 91
Figure 2-28 Remove the Pickup and feed rollers (Tray 3; 2 of 2) ............................................................... 92
Figure 2-29 Remove the separation roller (Tray 2) ................................................................................... 93
Figure 2-30 Remove the transfer roller (1 of 3) ....................................................................................... 94
Figure 2-31 Remove the transfer roller (2 of 3) ....................................................................................... 94
Figure 2-32 Remove the transfer roller (3 of 3) ....................................................................................... 95
Figure 2-33 Reinstall the transfer roller ................................................................................................... 95
Figure 2-34 Remove the secondary transfer assembly (1 of 3) .................................................................. 96
Figure 2-35 Remove the secondary transfer assembly (2 of 3) .................................................................. 96
Figure 2-36 Remove the secondary transfer assembly (3 of 3) .................................................................. 97
Figure 2-37 Reinstall the secondary transfer assembly ............................................................................. 97
Figure 2-38 Remove the intermediate transfer belt (1 of 3) ....................................................................... 98
Figure 2-39 Remove the intermediate transfer belt (2 of 3) ....................................................................... 98
Figure 2-40 Remove the intermediate transfer belt (3 of 3) ....................................................................... 99
Figure 2-41 Remove the right door; optional paper feeder (1 of 3) ......................................................... 100
Figure 2-42 Remove the right door; optional paper feeder (2 of 3) ......................................................... 1
00
Figure 2-43 Remove the right door; optional paper feeder (3 of 3) ......................................................... 101
Figure 2-44 External panels, covers, and doors; identification and location ............................................. 102
Figure 2-45 Remove the front door assembly (1 of 2) ............................................................................ 103
Figure 2-46 Remove the front door assembly (2 of 2) ............................................................................ 104
Figure 2-47 Remove the right door assembly (1 of 8) ............................................................................ 105
Figure 2-48 Remove the right door assembly (2 of 8) ............................................................................ 105
Figure 2-49 Remove the right door assembly (3 of 8) ............................................................................ 106
Figure 2-50 Remove the right door assembly (4 of 8) ............................................................................ 106
Figure 2-51 Remove the right door assembly (5 of 8) ............................................................................ 107
Figure 2-52 Remove the right door assembly (6 of 8) ............................................................................ 107
Figure 2-53 Remove the right door assembly (7 of 8) ............................................................................ 108
Figure 2-54 Remove the right door assembly (8 of 8) ............................................................................ 108
Figure 2-55 Remove the right rear cover (1 of 3) .................................................................................. 109
Figure 2-56 Remove the right rear cover (2 of 3) .................................................................................. 109
Figure 2-57 Remove the right rear cover (3 of 3) .................................................................................. 110
Figure 2-58 Remove the left cover (1 of 4) ........................................................................................... 111
Figure 2-59 Remove the left cover (2 of 4) ........................................................................................... 111
Figure 2-60 Remove the left cover (3 of 4) ........................................................................................... 112
Figure 2-61 Remove the le
ft cover (4 of 4) ........................................................................................... 112
Figure 2-62 Remove the left bottom cover ............................................................................................ 113
ENWW xxvii
Figure 2-63 Remove the left bottom handle .......................................................................................... 114
Figure 2-64 Remove the HIP (1 of 2) ................................................................................................... 115
Figure 2-65 Remove the HIP (2 of 2) ................................................................................................... 115
Figure 2-66 Remove the control panel assembly (1 of 4) ........................................................................ 116
Figure 2-67 Remove the control panel assembly (2 of 4) ........................................................................ 116
Figure 2-68 Remove the control panel assembly (3 of 4) ........................................................................ 117
Figure 2-69 Remove the control panel assembly (4 of 4) ........................................................................ 117
Figure 2-70 Remove the right front cover (1 of 5) .................................................................................. 118
Figure 2-71 Remove the right front cover (2 of 5) .................................................................................. 119
Figure 2-72 Remove the right front cover (3 of 5) .................................................................................. 119
Figure 2-73 Remove the right front cover (4 of 5) .................................................................................. 120
Figure 2-74 Remove the right front cover (5 of 5) .................................................................................. 120
Figure 2-75 Reinstall the power button ................................................................................................. 121
Figure 2-76 Remove the front top cover (1 of 2) .................................................................................... 122
Figure 2-77 Remove the front top cover (2 of 2) .................................................................................... 123
Figure 2-78 Remove the rear cover and upper rear cover (1 of 4) ........................................................... 124
Figure 2-79 Remove the rear cover and upper rear cover (2 of 4) ........................................................... 125
Figure 2-80 Remove the rear cover and upper rear cover (3 of 4) ........................................................... 125
Figure 2-81 Remove the rear cover and upper rear cover (4 of 4) ........................................................... 126
Figure 2-82 Remove the rear top cover (1 of 2) .................................................................................... 127
Figure 2-83 Remo
ve the rear top cover (2 of 2) .................................................................................... 128
Figure 2-84 Remove the right bottom handle ........................................................................................ 129
Figure 2-85 Remove the rear bottom handle ......................................................................................... 130
Figure 2-86 Remove the delivery fan, cartridge fan, and environmental sensor (1 of 9) ............................. 131
Figure 2-87 Remove the delivery fan, cartridge fan, and environmental sensor (2 of 9) ............................. 132
Figure 2-88 Remove the delivery fan, cartridge fan, and environmental sensor (3 of 9) ............................. 132
Figure 2-89 Remove the delivery fan, cartridge fan, and environmental sensor (4 of 9) ............................. 133
Figure 2-90 Remove the delivery fan, cartridge fan, and environmental sensor (5 of 9) ............................. 133
Figure 2-91 Remove the delivery fan, cartridge fan, and environmental sensor (6 of 9) ............................. 134
Figure 2-92 Remove the delivery fan, cartridge fan, and environmental sensor (7 of 9) ............................. 134
Figure 2-93 Remove the delivery fan, cartridge fan, and environmental sensor (8 of 9) ............................. 135
Figure 2-94 Remove the delivery fan, cartridge fan, and environmental sensor (9 of 9) ............................. 135
Figure 2-95 Remove the toner collection sensor (1 of 4) ......................................................................... 136
Figure 2-96 Remove the toner collection sensor (2 of 4) ......................................................................... 136
Figure 2-97 Remove the toner collection sensor (3 of 4) ......................................................................... 137
Figure 2-98 Remove the toner collection sensor (4 of 4) ......................................................................... 137
Figure 2-99 Remove the residual toner feed motor (1 of 7) ..................................................................... 138
Figure 2-100 Remove the residual toner feed motor (2 of 7) ................................................................... 139
Figure 2-101 Remove the residual toner feed motor (3 of 7) ................................................................... 139
Figure 2-102 Remove the residual toner feed motor (4 of 7) ................................................................... 140
Figure 2-103 Remove the residual toner feed motor (5 of 7) ................................................................... 140
xxviii ENWW
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