HP LaserJet 4345mfp Service Manual
HP LaserJet 4345mfp Series
Service Manual
Copyright and License
Trademark Credits
© 2004 Copyright Hewlett-Packard
Development Company, L.P.
Reproduction, adaptation, or translation
without prior written permission is
prohibited, except as allowed under the
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is subject to change without notice.
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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 Q3942-90950
Edition 1, 11/2004
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Table of contents
1 Product information
HP LaserJet 4345mfp configurations......................................................................................................2
HP LaserJet 4345mfp (Q3942A—base model)......................................................................2
HP LaserJet 4345x mfp (Q3943A)..........................................................................................2
HP LaserJet 4345xs mfp (Q3944A)........................................................................................3
HP LaserJet 4345xm mfp (Q3945A)......................................................................................3
Features and benefits of the MFP...........................................................................................................4
Functions.................................................................................................................................4
Speed and throughput............................................................................................................4
Resolution...............................................................................................................................4
Memory...................................................................................................................................4
User interface..........................................................................................................................5
Language and fonts ..............................................................................................................5
Copying and sending..............................................................................................................5
Print cartridge..........................................................................................................................5
Paper-handling .......................................................................................................................6
Connectivity.............................................................................................................................6
Environmental features...........................................................................................................6
Security features.....................................................................................................................7
Minimum system requirements for e-mail functionality..........................................................7
MFP parts and accessories.....................................................................................................................8
MFP parts................................................................................................................................8
Interface ports.......................................................................................................................10
Model and serial numbers....................................................................................................10
Accessories and supplies.....................................................................................................11
Parts compatibility with other HP LaserJet products............................................................12
Moving the MFP....................................................................................................................14
Locking and unlocking optional accessories........................................................................14
Site requirements...................................................................................................................................15
Physical specifications..........................................................................................................15
Environmental specifications................................................................................................16
MFP specifications................................................................................................................................17
Electrical specifications.........................................................................................................17
Acoustic specifications..........................................................................................................18
Image area............................................................................................................................18
Skew specifications...............................................................................................................18
Media specifications..............................................................................................................................19
Printing and paper-storage environment..............................................................................19
Envelopes.............................................................................................................................20
Envelopes that have double side seams.............................................................21
iii
Envelopes that have adhesive strips or flaps......................................................21
Envelope margins................................................................................................21
Envelope storage.................................................................................................21
Labels....................................................................................................................................22
Label construction................................................................................................22
Transparencies.....................................................................................................................22
Supported types and sizes of print media............................................................................23
Regulatory information..........................................................................................................................28
FCC and Telecom regulations..............................................................................................28
FCC regulations...................................................................................................28
Telecom................................................................................................................28
Environmental Product Stewardship program......................................................................29
Protecting the environment..................................................................................29
Ozone production.................................................................................................29
Energy consumption............................................................................................29
HP LaserJet printing supplies..............................................................................29
Material safety data sheet....................................................................................30
For more information............................................................................................31
Country-/region-specific safety statements..........................................................................32
Laser safety statement.........................................................................................32
Canadian DOC statement....................................................................................32
Japanese VCCI statement...................................................................................32
Korean EMI statement.........................................................................................32
Finnish laser statement........................................................................................33
Australia...............................................................................................................33
Declaration of conformity (HP LaserJet 4345mfp)................................................................................34
Declaration of conformity (HP LaserJet 4345x mfp, 4345xs mfp, and 4345xm mfp)...........................35
2 Service approach
Service approach...................................................................................................................................38
Ordering parts, accessories, and supplies............................................................................................39
Ordering directly from HP.....................................................................................................39
Ordering directly through the embedded Web server (for MFPs that are connected to
a network).............................................................................................................................39
To order directly through the embedded Web server..........................................39
Ordering directly through the HP Toolbox software (for MFPs that are directly
connected to a computer).....................................................................................................39
Hewlett-Packard Limited Warranty Statement......................................................................................40
Print Cartridge Limited Warranty Statement.........................................................................................41
Availability of support and service.........................................................................................................42
HP maintenance agreements................................................................................................................42
Priority Onsite Service..........................................................................................................42
Next business day.................................................................................................................42
Installation and maintenance-kit replacement......................................................................42
3 Installation and configuration
Installation checklist...............................................................................................................................44
Connecting to a computer or network...................................................................................................46
Network connection..............................................................................................................46
Parallel connection................................................................................................................46
iv
Fax connection......................................................................................................................47
Analog faxing........................................................................................................47
Connecting the fax accessory to a phone line....................................47
Configuring and using the fax features...............................................47
Digital faxing.........................................................................................................48
Optional output and input devices.........................................................................................................49
Security features....................................................................................................................................50
Securing the embedded Web server....................................................................................50
To secure the embedded Web server..................................................................50
Foreign Interface Harness (FIH)...........................................................................................50
Requirements.......................................................................................................50
Using the FIH.......................................................................................................50
To enable the FIH portal......................................................................50
To disable the FIH portal ....................................................................51
Secure Disk Erase................................................................................................................51
Data affected........................................................................................................52
Gaining access to Secure Disk Erase..................................................................52
Additional Information..........................................................................................52
Job-storage features.............................................................................................................52
HP DSS authentication.........................................................................................................52
Locking the control-panel menus..........................................................................................52
Locking the formatter cage...................................................................................................53
4 Maintenance
Cleaning the MFP..................................................................................................................................56
Calibrating the scanner..........................................................................................................................62
Performing preventive maintenance......................................................................................................63
Managing the print cartridge..................................................................................................................65
Cleaning the outside of the MFP..........................................................................................56
Cleaning the touchscreen.....................................................................................................56
Cleaning the scanner glass..................................................................................................56
Cleaning the fuser ................................................................................................................56
Running the cleaning page .................................................................................57
To run the cleaning page.....................................................................57
Cleaning the ADF delivery system........................................................................................58
To clean the ADF delivery system.......................................................................58
To clean the ADF rollers......................................................................................59
To print the calibration target................................................................................................62
Printer preventive maintenance ...........................................................................................63
To reset the maintenance-kit counter..................................................................63
The ADF maintenance kit.....................................................................................................64
HP print cartridges................................................................................................................65
Non-HP print cartridges........................................................................................................65
Print-cartridge authentication................................................................................................65
Print-cartridge storage..........................................................................................................65
Print-cartridge life expectancy..............................................................................................65
Checking the supply level.....................................................................................................66
To check the supply level by using the control panel..........................................66
To check the supply level by using the embedded Web server..........................66
To check the supply level by using the HP Toolbox software.............................66
v
To check the supply levels by using HP Web Jetadmin......................................66
Cartridge-low and cartridge-out conditions...........................................................................66
When the cartridge is low on toner or drum life...................................................66
When the cartridge is out of toner or drum life.....................................................67
Setting the real-time clock.....................................................................................................................68
Setting the date and time......................................................................................................68
To set the date format..........................................................................................68
To set the date.....................................................................................................68
To set the time format..........................................................................................68
To set the time......................................................................................................69
Setting the wake time............................................................................................................69
To set the wake time............................................................................................69
Setting the sleep delay.........................................................................................................70
To set the sleep delay..........................................................................................70
Configuring and verifying an IP address...............................................................................................71
TCP/IP assignment...............................................................................................................7 1
Automatic discovery.............................................................................................71
Dynamic host configuration protocol (DHCP)......................................................71
Verifying the TCP/IP configuration........................................................................................71
Changing an IP address.......................................................................................................71
To change an IP address by using HP Web Jetadmin........................................71
To change an IP address by using the embedded Web server..........................72
To change an IP address by using the control panel..........................................72
Upgrading the firmware.........................................................................................................................73
Determining the current level of firmware.............................................................................73
Downloading the new firmware from the HP Web site.........................................................73
Transferring the new firmware to the MFP...........................................................................73
Using FTP to upgrade the firmware on a network connection.............................73
To upgrade the firmware on a network connection by using FTP......74
Using HP Web Jetadmin to upgrade the firmware...............................................75
Using MS-DOS commands to upgrade the firmware..........................................75
Upgrading the HP Jetdirect firmware....................................................................................76
5 Theory of operation
Basic operation......................................................................................................................................78
Sequence of operation (printer)............................................................................................78
Sequence of operation (scanner).........................................................................................79
Formatter system...................................................................................................................................80
Sleep mode...........................................................................................................................80
Resolution Enhancement technology (REt)..........................................................................80
EconoMode...........................................................................................................................81
Input/output...........................................................................................................................81
CPU.......................................................................................................................................81
Memory.................................................................................................................................81
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Hard disk..............................................................................................................81
Random-access memory.....................................................................................81
DIMM slots...........................................................................................................81
Flash memory.......................................................................................................82
Firmware flash memory card...............................................................................82
Nonvolatile memory.............................................................................................82
HP Memory Enhancement technology................................................................82
PJL overview.........................................................................................................................82
PML.......................................................................................................................................82
Control panel.........................................................................................................................82
Scanner interface..................................................................................................................83
Engine-control system...........................................................................................................................84
DC controller PCA.................................................................................................................84
Motors and fans....................................................................................................................86
Motor and fan functions........................................................................................86
Ambient-temperature detection............................................................................87
Engine power supply circuit..................................................................................................87
Fuser control.........................................................................................................................88
Fuser over-temperature protection......................................................................89
High-voltage power supply...................................................................................................91
Low-voltage power supply ...................................................................................................92
Overcurrent/overvoltage protection......................................................................................94
Toner detection.....................................................................................................................94
Cartridge detection................................................................................................................94
Laser/scanner system...........................................................................................................................95
Laser/scanner control...........................................................................................................96
Image-formation system........................................................................................................................98
Print cartridge........................................................................................................................99
Cartridge memory................................................................................................99
Image-formation process....................................................................................................100
Pickup, feed, and delivery system.......................................................................................................102
Pickup-and-feed block........................................................................................................105
Printing from tray 1.............................................................................................106
Printing from tray 2.............................................................................................107
Media-size detection.........................................................................108
Cassette media-size detection.........................................108
Media-length detection.....................................................108
Media-width detection.......................................................108
Cassette pickup operation.................................................................108
Lifter-driver operation........................................................................110
Multifeed prevention..........................................................................110
Distance-between-pages adjustment................................................111
Media-skew prevention......................................................................................112
Feed-speed control............................................................................................114
Fusing and reversing/delivery block...................................................................................115
Fusing.................................................................................................................115
Face-down delivery............................................................................................115
Face-up delivery.................................................................................................116
Jam detection......................................................................................................................118
Pickup delay jam from tray 1..............................................................................118
Pickup delay jam from tray 2..............................................................................118
Pickup stationary jam.........................................................................................118
Fuser-delivery delay jam....................................................................................119
Fuser wrapping jam............................................................................................119
Fuser-delivery stationary jam when feeding regular-size media.......................119
Fuser-delivery stationary jam when feeding custom-size media.......................119
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Reversing delay jam (face-down delivery only).................................................119
Reversing stationary jam (face-down delivery only)..........................................120
Delivery delay jam during face-down delivery...................................................120
Delivery delay jam during face-up delivery........................................................120
Delivery stationary jam during face-down delivery............................................120
Delivery stationary jam during face-up delivery.................................................120
Door-open jam...................................................................................................120
Residual-media jam...........................................................................................121
Printing from the 500-sheet feeder.....................................................................................122
500-sheet feeder pickup and feeding................................................................123
Duplex-printing unit.............................................................................................................125
Reversing/duplexing pickup...............................................................................125
Duplex printing jam detection.............................................................................126
Duplex-unit-pickup delay jam............................................................127
Duplex-unit stationary jam.................................................................127
Duplex-unit delay jam........................................................................127
3-bin mailbox feed and delivery system.............................................................................128
Stacker mode.....................................................................................................130
Mailbox mode.....................................................................................................130
Function-separator mode...................................................................................130
Jam detection.....................................................................................................130
Feed-delay jam..................................................................................130
Feed-stationary jam...........................................................................131
Residual-media jam...........................................................................131
Stapler/stacker feed and delivery system...........................................................................132
Staple mode.......................................................................................................134
Stacker mode.....................................................................................................134
Staple-jam detection..........................................................................................134
Feed-delay jam..................................................................................134
Feed-stationary jam...........................................................................135
Delivery-stationary jam......................................................................135
Residual-media jam...........................................................................135
Stapler unit.........................................................................................................135
Scanner system...................................................................................................................................137
Electrical system.................................................................................................................137
Motors and fans..................................................................................................................139
Optical assembly.................................................................................................................139
ADF feed system................................................................................................................141
Jam detection......................................................................................................................141
Residual-media jam...........................................................................................141
ADF pickup jam..................................................................................................142
ADF jam.............................................................................................................142
Registration sensor jam.....................................................................142
Read sensor jam...............................................................................142
Exit sensor jam..................................................................................142
ADF cover open jam..........................................................................................142
ADF open jam....................................................................................................142
6 Removal and replacement
Removal and replacement strategy.....................................................................................................144
viii
Required tools.....................................................................................................................144
Before performing service...................................................................................................145
After completing service.....................................................................................................145
Screws that are used in the MFP........................................................................................146
User-replaceable parts........................................................................................................................147
Print cartridge......................................................................................................................148
Control-panel overlays........................................................................................................148
Control panel.......................................................................................................................149
Transfer roller......................................................................................................................150
ADF input tray.....................................................................................................................151
ADF pickup and feed rollers...............................................................................................153
ADF separation pad............................................................................................................154
ADF delivery guide (clear mylar sheet)..............................................................................155
Output-bin assembly...........................................................................................................157
Duplex-printing unit.............................................................................................................158
Fuser-entrance guide..........................................................................................................159
Fuser...................................................................................................................................160
Tray 2, 3, 4, or 5 pickup and feed rollers............................................................................161
Tray 1 pickup roller.............................................................................................................162
Scanner filter cover and scanner filter................................................................................163
ADF-hinge flap....................................................................................................................164
Formatter cover and formatter............................................................................................166
Hard drive...........................................................................................................................168
DIMMs.................................................................................................................................170
Flash memory card (firmware)............................................................................................171
Fax accessory.....................................................................................................................172
Covers, doors, and external panels.....................................................................................................173
Top-cover flatbed flange.....................................................................................................174
Front cover..........................................................................................................................175
Back cover..........................................................................................................................179
Internal assemblies..............................................................................................................................181
Reversing-separation-guide assembly ..............................................................................182
Reversing assembly............................................................................................................183
Main fan (FN101) and reversing-unit fan (FN103).............................................................188
Thermistor (TH3).................................................................................................................193
Tray 2 jam-access-cover switch (SW105)..........................................................................195
Tray 1 assembly..................................................................................................................197
Front-cover support.............................................................................................................200
Tray 1 feed-assembly.........................................................................................................201
Feed-roller assembly..........................................................................................................208
DC controller.......................................................................................................................211
Main motor (M101)..............................................................................................................214
DC controller fan (FN104)...................................................................................................215
Print-cartridge fan (FN102).................................................................................................217
Print-cartridge motor (M102)...............................................................................................219
Top-cover switch (SW101).................................................................................................221
Registration assembly........................................................................................................223
Paper-pickup-drive assembly ............................................................................................227
Lifter-drive assembly...........................................................................................................231
Power-factor-correction (PFC) power supply.....................................................................234
ix
Engine power supply...........................................................................................................239
Paper-feed assembly..........................................................................................................245
Tray 2 detection switch.......................................................................................................247
Paper-size-detection switch (SW102)................................................................................248
Tray 2 paper-present sensor (PS101)................................................................................249
Laser/scanner.....................................................................................................................250
Output-bin-full sensor.........................................................................................................252
ADF and scanner components............................................................................................................254
ADF assembly.....................................................................................................................254
Scanner assembly..............................................................................................................256
Scanner glass.....................................................................................................................261
Optical unit..........................................................................................................................264
Scanner bulb.......................................................................................................................268
Inverter PCA.......................................................................................................................270
Scanner fan.........................................................................................................................271
Scanner home-position sensor...........................................................................................272
Scanner-controller PCA......................................................................................................274
ADF components.................................................................................................................................275
ADF output-bin extension...................................................................................................276
ADF white mylar-backing....................................................................................................278
ADF front cover...................................................................................................................280
ADF rear cover ...................................................................................................................281
ADF left-side cover.............................................................................................................282
ADF jam-access cover and latch........................................................................................284
ADF leading-edge and paper-present sensors..................................................................286
ADF hinges.........................................................................................................................287
500-sheet feeder components.............................................................................................................289
500-sheet-feeder pickup and feed rollers...........................................................................289
500-sheet-feeder rear cover...............................................................................................290
500-sheet-feeder right cover...............................................................................................291
500-sheet-feeder front cover..............................................................................................292
500-sheet-feeder upper-left cover......................................................................................294
500-sheet-feeder left-side cover.........................................................................................295
500-sheet-feeder number-plate assembly..........................................................................296
500-sheet-cassette front cover...........................................................................................297
500-sheet-feeder PCA........................................................................................................298
500-sheet-feeder lifter-drive assembly...............................................................................299
500-sheet-feeder paper-size switch...................................................................................300
500-sheet-feeder jam-access-cover-open switch...............................................................302
7 Troubleshooting
Troubleshooting process.....................................................................................................................304
Control-panel messages......................................................................................................................310
x
Initial troubleshooting checklist...........................................................................................304
Troubleshooting checklist..................................................................................304
Troubleshooting flowchart...................................................................................................306
Power-on checks................................................................................................................308
Power-on troubleshooting overview...................................................................308
Using the MFP help system................................................................................................310
Resolving control-panel messages.....................................................................................310
Accessory lights for the 3-bin mailbox and stapler/stacker.................................................................332
Accessory lights .................................................................................................................332
Formatter lights....................................................................................................................................333
Copy-board LED.................................................................................................................333
HP Jetdirect LEDs...............................................................................................................333
Heartbeat LED....................................................................................................................334
Fax LED..............................................................................................................................334
Jams....................................................................................................................................................335
Clearing jams from the top-cover and print-cartridge areas...............................................337
Clearing jams from the optional envelope-feeder area......................................................339
Clearing jams from the tray 1 area.....................................................................................341
Clearing jams from the tray 2, 3, 4, or 5 areas...................................................................343
Clearing jams from the optional duplexer...........................................................................345
Clearing jams from the output areas..................................................................................347
Clearing jams from the fuser...............................................................................................349
To clear jams from the fuser..............................................................................349
Clearing jams from the ADF...............................................................................................353
Clearing staple jams...........................................................................................................354
Solving repeated jams........................................................................................................356
Causes of persistent jams..................................................................................................357
Jams in the top-cover and print-cartridge area..................................................357
Jams in the envelope-feeder area and the tray 1 area......................................358
Jams in the tray 2 area and the optional 500-sheet feeder areas.....................358
Jams in the duplexing area................................................................................359
Jams in the output area......................................................................................359
Jams in the fuser................................................................................................361
Jams in the ADF.................................................................................................361
Using the paper-path test...................................................................................................362
Using the scanner tests......................................................................................................362
Image-formation troubleshooting.........................................................................................................363
Media-related print-quality problems..................................................................................363
Overhead transparency defects..........................................................................................364
Print-quality problems that are related to the environment................................................364
Print-quality problems that are related to jams...................................................................364
Image-defect examples......................................................................................................365
Light print (partial page) ....................................................................................367
Light print (entire page) .....................................................................................368
Specks or dots ..................................................................................................369
Dropouts ............................................................................................................370
Lines ..................................................................................................................372
Horizontal lines...................................................................................................373
Gray background ...............................................................................................374
Loose toner or toner smear ...............................................................................375
Repeating defects and repeating images .........................................................376
Misformed characters ........................................................................................377
Page skew..........................................................................................................378
Curl or wave ......................................................................................................379
Wrinkles or creases ...........................................................................................380
Vertical white lines ............................................................................................381
Horizontal white lines.........................................................................................382
xi
Tire tracks ..........................................................................................................383
White spots on black .........................................................................................384
Scattered lines ..................................................................................................385
Blurred print .......................................................................................................386
Random image repetition ..................................................................................387
Blank page (ADF)...............................................................................................388
Page skew (ADF)...............................................................................................389
Vertical lines (ADF)............................................................................................390
Image shifted (ADF)...........................................................................................391
Unexpected image (ADF)...................................................................................391
Repetitive defect ruler.........................................................................................................392
Media-transport problems....................................................................................................................394
E-mail problems...................................................................................................................................396
To validate the SMTP gateway address.............................................................................396
To validate the LDAP gateway address.............................................................................396
Fax problems.......................................................................................................................................397
Network connectivity problems............................................................................................................397
Troubleshooting network printing problems .......................................................................397
Loopback test......................................................................................................................397
Ping test..............................................................................................................................398
Functional checks................................................................................................................................399
Engine test..........................................................................................................................399
Formatter test......................................................................................................................399
Half self-test........................................................................................................................400
Drum-rotation test...............................................................................................................400
MFP resets..........................................................................................................................................401
Cold reset............................................................................................................................401
NVRAM initialization...........................................................................................................401
Hard-disk initialization.........................................................................................................402
Tools for troubleshooting.....................................................................................................................403
Using the embedded Web server.......................................................................................403
Opening the embedded Web server..................................................................403
Information tab...................................................................................................404
Settings tab........................................................................................................404
Digital Sending tab.............................................................................................405
Networking tab ..................................................................................................405
Other links..........................................................................................................405
Using the HP Toolbox.........................................................................................................407
Supported operating systems............................................................................407
Supported browsers...........................................................................................407
Opening the HP Toolbox....................................................................................408
Status tab...........................................................................................................408
Alerts tab............................................................................................................408
Set up Status Alerts page..................................................................409
Administrative settings page.............................................................409
Device Settings window.....................................................................................409
Toolbox links......................................................................................................409
Other links..........................................................................................................409
Using HP Web Jetadmin software......................................................................................410
Information pages...............................................................................................................411
xii
To print an information page..............................................................................411
Menu map..........................................................................................................411
Configuration pages...........................................................................................412
Configuration page............................................................................412
HP Jetdirect page..............................................................................414
Finding important information on the configuration pages................415
Supplies status page..........................................................................................417
Usage page........................................................................................................418
PCL or PS font list..............................................................................................419
Diagnostics menu...............................................................................................................420
Individual component diagnostics.......................................................................................423
Paper-path-sensor test.......................................................................................423
Manual sensor test.............................................................................................424
Scanner tests.....................................................................................................425
Component test..................................................................................................425
Service menu......................................................................................................................426
Service ID...........................................................................................................................428
Restoring the Service ID....................................................................................428
Converting the service ID to an actual date.......................................................428
Troubleshooting the embedded HP Jetdirect print server..................................................429
Firmware-stack trace..........................................................................................................429
Diagrams for troubleshooting..............................................................................................................430
DC controller connections...................................................................................................430
Scanner-controller PCA connections..................................................................................432
Locations of major components..........................................................................................433
Sensors and switches........................................................................................435
Cassette sensors...............................................................................435
Sensors in the print-cartridge area....................................................436
Sensors on the reversing unit (top side)...........................................437
Sensors in the interior of the MFP.....................................................438
Output-bin detection switch, SW103.................................................439
Tray 1 paper-present sensor, PS105................................................439
Top-cover switch, SW101.................................................................440
Tray 2 jam-access-cover switch, SW105..........................................440
Motors, fans, solenoids, and clutch....................................................................441
Front-side fans...................................................................................441
Rear-side fans...................................................................................442
Rear-side motors (1 of 2)..................................................................443
Rear-side motors (2 of 2)..................................................................444
Rear-side solenoid............................................................................444
Reversing-unit motors and solenoids................................................445
Right, rear corner components (1 of 2).............................................446
Right, rear corner components (2 of 2).............................................447
Scanner and ADF components..........................................................................448
ADF output-bin-full sensor.................................................................448
ADF pickup assembly sensors..........................................................449
ADF motors, solenoid, and sensors..................................................450
General timing chart............................................................................................................451
General circuit diagrams.....................................................................................................453
xiii
8 Parts and diagrams
How to order parts, supplies, and accessories...................................................................................458
How to use the parts lists and diagrams.............................................................................................458
Screws that are used in the MFP........................................................................................................459
Customer-replaceable parts and accessories.....................................................................................460
Accessories.........................................................................................................................460
Customer-replaceable components (print engine).............................................................462
Customer-replaceable components (ADF and scanner)....................................................464
Cables and interfaces.........................................................................................................466
Control panel and control-panel overlays...........................................................................468
Memory...............................................................................................................................470
Print cartridge and maintenance kits..................................................................................472
Documentation, software, and training material..................................................................................474
Assembly locations..............................................................................................................................476
External components...........................................................................................................................480
Print-engine internal components........................................................................................................482
Upper-plate assembly.........................................................................................................482
Internal components (1 of 5)...............................................................................................484
Internal components (2 of 5)...............................................................................................486
Internal components (3 of 5)...............................................................................................488
Internal components (4 of 5)...............................................................................................490
Internal components (5 of 5)...............................................................................................492
Electrical/forward assembly................................................................................................494
Main drive assembly...........................................................................................................496
Paper-pickup-drive assembly.............................................................................................498
Lifter-drive assembly...........................................................................................................500
Cassette..............................................................................................................................502
Paper-feed roller assembly.................................................................................................504
Registration assembly........................................................................................................506
Multipurpose assembly.......................................................................................................508
Reverse assembly..............................................................................................................510
Reverse-separation-guide assembly..................................................................................512
Delivery assembly...............................................................................................................514
Fuser...................................................................................................................................516
ADF components.................................................................................................................................518
ADF assembly.....................................................................................................................518
ADF internal components (1 of 3).......................................................................................520
ADF internal components (2 of 3).......................................................................................522
ADF internal components (3 of 3).......................................................................................524
ADF input tray.....................................................................................................................526
ADF separation pad............................................................................................................528
ADF separation-pad case...................................................................................................530
ADF pickup-roller assembly................................................................................................532
ADF pickup-roller cover......................................................................................................534
ADF mylar-holder assembly...............................................................................................536
ADF mylar replacement kit.................................................................................................538
Scanner components...........................................................................................................................540
Scanner glass and cover....................................................................................................540
Scanner-base components.................................................................................................542
Scanner flatbed-unit assembly...........................................................................................544
xiv
Scanner covers...................................................................................................................546
Scanner-carriage-lock assembly........................................................................................548
Scanner-open-sensor assembly.........................................................................................550
Scanner-motor fan..............................................................................................................552
Scanner motor....................................................................................................................554
Scanner-belt assembly.......................................................................................................556
Scanner slide-rail................................................................................................................558
Scanner optical assembly...................................................................................................560
500-sheet feeder components.............................................................................................................562
Assembly locations.............................................................................................................562
External components..........................................................................................................564
500-sheet feeder main body (1 of 2)..................................................................................566
500-sheet feeder main body (2 of 2)..................................................................................568
500-sheet feeder lifter-drive assembly...............................................................................570
500-sheet feeder cassette..................................................................................................572
Optional devices..................................................................................................................................574
Duplex-printing accessory..................................................................................................574
Stapler/stacker....................................................................................................................576
3-bin mailbox.......................................................................................................................578
Alphabetical parts list...........................................................................................................................580
Numerical parts list..............................................................................................................................593
Index....................................................................................................................................................................607
xv
xvi
List of tables
Table 1-1 Parts compatibility..........................................................................................................................12
Table 1-2 Product dimensions........................................................................................................................15
Table 1-3 Product dimensions, with all doors and trays fully opened............................................................15
Table 1-4 Environmental specifications..........................................................................................................16
Table 1-5 Power requirements (HP LaserJet 4345mfp Series).....................................................................17
Table 1-6 Power consumption HP LaserJet 4345mfp Series (average, in watts).........................................17
Table 1-7 Sound power and pressure level (HP LaserJet 4345mfp Series)..................................................18
Table 1-8 Supported types of media..............................................................................................................23
Table 1-9 Tray 1 supported sizes and weights...............................................................................................23
Table 1-10 Trays 2, 3, 4, and 5 supported sizes and weights..........................................................................24
Table 1-11 Optional duplexer supported sizes and weights ...........................................................................25
Table 1-12 Optional envelope feeder supported sizes and weights................................................................25
Table 1-13 Optional 3-bin mailbox or stacker part of the stapler/stacker supported sizes and weights .........26
Table 1-14 Stapler part of the optional stapler/stacker supported sizes and weights .....................................27
Table 1-15 ADF supported sizes and weights .................................................................................................27
Table 3-1 Installation checklist.......................................................................................................................44
Table 5-1 Print-engine motors........................................................................................................................86
Table 5-2 Print-engine fans............................................................................................................................86
Table 5-3 Cassette media-size detection switch components.....................................................................108
Table 6-1 Common fasteners used in this MFP...........................................................................................146
Table 7-1 Troubleshooting flowchart............................................................................................................307
Table 7-2 Control-panel messages..............................................................................................................310
Table 7-3 Control-panel messages for jams................................................................................................335
Table 7-4 Jams in the top-cover and print-cartridge area............................................................................357
Table 7-5 Causes of jams in the envelope-feeder area and the tray 1 area................................................358
Table 7-6 Causes of jams in the tray 2 area and the optional 500-sheet feeder areas...............................358
Table 7-7 Causes of jams in the duplexing area..........................................................................................359
Table 7-8 Causes of jams in the output area...............................................................................................359
Table 7-9 Causes of jams in the fuser..........................................................................................................361
Table 7-10 Causes of jams in the ADF..........................................................................................................361
Table 7-11 Defects that can occur during printing.........................................................................................365
Table 7-12 Defects that can occur when using the ADF................................................................................366
Table 7-13 Light print (partial page)...............................................................................................................367
Table 7-14 Light print (entire page)................................................................................................................368
Table 7-15 Specks or dots..............................................................................................................................369
Table 7-16 Dropouts.......................................................................................................................................370
Table 7-17 Vertical lines (in the paper-path direction)...................................................................................372
Table 7-18 Horizontal lines (perpendicular to the paper-path direction)........................................................373
Table 7-19 Repetitive defects.........................................................................................................................392
Table 7-20 Important information on the configuration pages.......................................................................415
xvii
Table 7-21 Paper-path sensor letter designations.........................................................................................423
Table 7-22 Manual sensor test letter designations........................................................................................424
Table 7-23 Service menu...............................................................................................................................426
Table 8-1 Common fasteners used in this MFP...........................................................................................459
Table 8-2 Accessories..................................................................................................................................461
Table 8-3 Customer-replaceable components (print engine).......................................................................463
Table 8-4 Customer-replaceable components (ADF and scanner).............................................................465
Table 8-5 Cables and interfaces...................................................................................................................467
Table 8-6 Control panel and control-panel overlays....................................................................................469
Table 8-7 Memory.........................................................................................................................................471
Table 8-8 Print cartridge and maintenance kits............................................................................................473
Table 8-9 Documentation, software, and training material...........................................................................475
Table 8-10 External panels and covers..........................................................................................................481
Table 8-11 Upper-plate assembly..................................................................................................................483
Table 8-12 Internal components (1 of 5)........................................................................................................485
Table 8-13 Internal components (2 of 5)........................................................................................................487
Table 8-14 Internal components (3 of 5)........................................................................................................489
Table 8-15 Internal components (4 of 5)........................................................................................................491
Table 8-16 Internal components (5 of 5)........................................................................................................493
Table 8-17 Electrical/forward assembly.........................................................................................................495
Table 8-18 Main drive assembly.....................................................................................................................497
Table 8-19 Paper-pickup-drive assembly.......................................................................................................499
Table 8-20 Lifter-drive assembly....................................................................................................................501
Table 8-21 Cassette.......................................................................................................................................503
Table 8-22 Paper-feed roller assembly..........................................................................................................505
Table 8-23 Registration assembly..................................................................................................................507
Table 8-24 Multipurpose assembly.................................................................................................................509
Table 8-25 Reverse assembly........................................................................................................................511
Table 8-26 Reverse-separation-guide assembly............................................................................................513
Table 8-27 Delivery assembly........................................................................................................................515
Table 8-28 Fuser............................................................................................................................................517
Table 8-29 ADF assembly..............................................................................................................................519
Table 8-30 ADF internal components (1 of 3)................................................................................................521
Table 8-31 ADF internal components (2 of 3)................................................................................................523
Table 8-32 ADF internal components (3 of 3)................................................................................................525
Table 8-33 ADF input tray..............................................................................................................................527
Table 8-34 ADF separation pad.....................................................................................................................529
Table 8-35 ADF separation-pad case............................................................................................................531
Table 8-36 ADF pickup-roller assembly.........................................................................................................533
Table 8-37 ADF pickup-roller cover................................................................................................................535
Table 8-38 ADF mylar-holder assembly.........................................................................................................537
Table 8-39 ADF mylar replacement kit...........................................................................................................539
Table 8-40 Scanner glass and cover..............................................................................................................541
Table 8-41 Scanner-base components..........................................................................................................543
Table 8-42 Scanner flatbed-unit assembly.....................................................................................................545
Table 8-43 Scanner covers............................................................................................................................547
Table 8-44 Scanner-carriage-lock assembly..................................................................................................549
Table 8-45 Scanner-open-sensor assembly..................................................................................................551
Table 8-46 Scanner-motor fan........................................................................................................................553
Table 8-47 Scanner motor..............................................................................................................................555
xviii
Table 8-48 Scanner-belt assembly.................................................................................................................557
Table 8-49 Scanner slide-rail..........................................................................................................................559
Table 8-50 Scanner optical assembly............................................................................................................561
Table 8-51 500-sheet feeder external components.......................................................................................565
Table 8-52 500-sheet feeder main body (1 of 2)............................................................................................567
Table 8-53 500-sheet feeder main body (2 of 2)............................................................................................569
Table 8-54 500-sheet feeder lifter-drive assembly.........................................................................................571
Table 8-55 500-sheet feeder cassette............................................................................................................573
Table 8-56 Duplex-printing assembly.............................................................................................................575
Table 8-57 Stapler/stacker accessory............................................................................................................577
Table 8-58 3-bin mailbox accessory...............................................................................................................579
Table 8-59 Alphabetical parts list...................................................................................................................580
Table 8-60 Numerical parts list.......................................................................................................................593
xix
xx
List of figures
Figure 5-1 DC controller PCA block diagram..................................................................................................85
Figure 5-2 Power supply circuit block diagram................................................................................................87
Figure 5-3 Fuser components .........................................................................................................................88
Figure 5-4 Fuser circuit....................................................................................................................................90
Figure 5-5 High-voltage power supply circuit..................................................................................................91
Figure 5-6 Low-voltage power supply circuit...................................................................................................93
Figure 5-7 Laser/scanner assembly................................................................................................................95
Figure 5-8 Laser-control-circuit block diagram................................................................................................97
Figure 5-9 Image-formation system.................................................................................................................98
Figure 5-10 Cartridge memory...........................................................................................................................99
Figure 5-11 Eight stages of image-formation..................................................................................................100
Figure 5-12 Motor, clutch, and solenoid locations...........................................................................................103
Figure 5-13 Sensor and switch locations.........................................................................................................104
Figure 5-14 Pickup, feed, and delivery system................................................................................................105
Figure 5-15 Tray 1 timing.................................................................................................................................106
Figure 5-16 Tray 2 timing.................................................................................................................................107
Figure 5-17 Cassette pickup operation............................................................................................................109
Figure 5-18 Multifeed prevention.....................................................................................................................110
Figure 5-19 Distance-between-pages adjustment...........................................................................................111
Figure 5-20 Corner of the media contacts the shutter.....................................................................................112
Figure 5-21 Media sags until the entire leading edge contacts the shutter.....................................................113
Figure 5-22 Skew is corrected, and the shutter opens....................................................................................113
Figure 5-23 Fusing and reversing/delivery block.............................................................................................115
Figure 5-24 Face-down delivery: media enters the reversing unit..................................................................116
Figure 5-25 Face-down delivery: media reverses direction.............................................................................116
Figure 5-26 Face-up delivery...........................................................................................................................117
Figure 5-27 Paper path with 500-sheet feeders installed................................................................................122
Figure 5-28 500-sheet feeder I/O block diagram.............................................................................................123
Figure 5-29 500-sheet feeder pickup and feed diagram.................................................................................124
Figure 5-30 Duplex printing paper path...........................................................................................................125
Figure 5-31 Duplex printing control..................................................................................................................126
Figure 5-32 3-bin mailbox operation................................................................................................................129
Figure 5-33 Media flow when using the stacker mode....................................................................................130
Figure 5-34 Stapler/stacker operation.............................................................................................................133
Figure 5-35 Jogger operation (top view)..........................................................................................................134
Figure 5-36 Stapler unit operation...................................................................................................................136
Figure 5-37 ADF mechanical structure............................................................................................................137
Figure 5-38 Scanner assembly electrical structure.........................................................................................138
Figure 5-39 Scan carriage components..........................................................................................................139
Figure 5-40 Scan carriage movement.............................................................................................................140
xxi
Figure 5-41 ADF paper path and sensors.......................................................................................................141
Figure 6-1 Remove the control-panel overlays .............................................................................................148
Figure 6-2 Remove the control panel (1 of 2)................................................................................................149
Figure 6-3 Remove the control panel (2 of 2)................................................................................................149
Figure 6-4 Remove the transfer roller............................................................................................................150
Figure 6-5 Remove the ADF input tray (1 of 3).............................................................................................151
Figure 6-6 Remove the ADF input tray (2 of 3).............................................................................................151
Figure 6-7 Remove the ADF input tray (3 of 3).............................................................................................152
Figure 6-8 Remove the ADF pickup and feed rollers (1 of 2)........................................................................153
Figure 6-9 Remove the ADF pickup and feed rollers (2 of 2) .......................................................................153
Figure 6-10 Remove the ADF separation pad (1 of 2)....................................................................................154
Figure 6-11 Remove the ADF separation pad (2 of 2)....................................................................................154
Figure 6-12 Remove the ADF delivery guide (1 of 3) .....................................................................................155
Figure 6-13 Remove the ADF delivery guide (2 of 3)......................................................................................155
Figure 6-14 Remove the ADF delivery guide (3 of 3)......................................................................................156
Figure 6-15 Reinstall the clear mylar sheet.....................................................................................................156
Figure 6-16 Remove the output-bin assembly (1 of 2)....................................................................................157
Figure 6-17 Remove the output-bin assembly (2 of 2)....................................................................................157
Figure 6-18 Remove the duplex-printing unit (1 of 2)......................................................................................158
Figure 6-19 Remove the duplex-printing unit (2 of 2)......................................................................................158
Figure 6-20 Remove the fuser-entrance guide................................................................................................159
Figure 6-21 Remove the fuser.........................................................................................................................160
Figure 6-22 Remove the tray 2, 3, 4, or 5 pickup and feed rollers (1 of 2).....................................................161
Figure 6-23 Remove the tray 2, 3, 4, or 5 pickup and feed rollers (2 of 2).....................................................161
Figure 6-24 Remove the tray 1 pickup roller...................................................................................................162
Figure 6-25 Remove the scanner filter (1 of 2) ...............................................................................................163
Figure 6-26 Remove the scanner filter (2 of 2) ...............................................................................................163
Figure 6-27 Remove the ADF-hinge flap (1 of 3) ...........................................................................................164
Figure 6-28 Remove the ADF-hinge flap (2 of 3)............................................................................................164
Figure 6-29 Remove the ADF-hinge flap (3 of 3)............................................................................................165
Figure 6-30 Remove the formatter cover and formatter (1 of 3) ....................................................................166
Figure 6-31 Remove the formatter cover and formatter (2 of 3) ....................................................................166
Figure 6-32 Remove the formatter cover and formatter (3 of 3) ....................................................................167
Figure 6-33 Remove the hard drive (1 of 2) ...................................................................................................168
Figure 6-34 Remove the hard drive (2 of 2) ...................................................................................................169
Figure 6-35 Remove the DIMM.......................................................................................................................170
Figure 6-36 Remove a flash memory card......................................................................................................171
Figure 6-37 Remove the fax accessory...........................................................................................................172
Figure 6-38 Remove the top-cover flatbed flange (1 of 2) ..............................................................................174
Figure 6-39 Remove the top-cover flatbed flange (2 of 2)...............................................................................174
Figure 6-40 Remove the front cover (1 of 7)...................................................................................................175
Figure 6-41 Remove the front cover (2 of 7) ..................................................................................................176
Figure 6-42 Remove the front cover (3 of 7)...................................................................................................176
Figure 6-43 Remove the front cover (4 of 7)...................................................................................................177
Figure 6-44 Remove the front cover (5 of 7)...................................................................................................177
Figure 6-45 Remove the front cover (6 of 7)...................................................................................................178
Figure 6-46 Remove the front cover (7 of 7)...................................................................................................178
Figure 6-47 Remove the back cover (1 of 3)...................................................................................................179
Figure 6-48 Remove the back cover (2 of 3)...................................................................................................179
Figure 6-49 Remove the back cover (3 of 3)...................................................................................................180
xxii
Figure 6-50 Remove the reversing-separation-guide assembly (1 of 2) ........................................................182
Figure 6-51 Remove the reversing-separation-guide assembly (2 of 2).........................................................182
Figure 6-52 Remove the reversing assembly (1 of 8).....................................................................................183
Figure 6-53 Remove the reversing assembly (2 of 8) ....................................................................................184
Figure 6-54 Remove the reversing assembly (3 of 8) ....................................................................................185
Figure 6-55 Remove the reversing assembly (4 of 8) ....................................................................................185
Figure 6-56 Remove the reversing assembly (5 of 8).....................................................................................186
Figure 6-57 Remove the reversing assembly (6 of 8).....................................................................................186
Figure 6-58 Remove the reversing assembly (7 of 8).....................................................................................187
Figure 6-59 Remove the reversing assembly (8 of 8).....................................................................................187
Figure 6-60 Remove the main fan and reversing-unit fan (1 of 9) .................................................................188
Figure 6-61 Remove the main fan and reversing-unit fan (2 of 9)..................................................................188
Figure 6-62 Remove the main and reversing-unit fans (3 of 9).......................................................................189
Figure 6-63 Remove the main and reversing-unit fans (4 of 9).......................................................................189
Figure 6-64 Remove the main and reversing-unit fans (5 of 9).......................................................................190
Figure 6-65 Remove the main and reversing-unit fans (6 of 9).......................................................................190
Figure 6-66 Remove the main and reversing-unit fans (7 of 9).......................................................................191
Figure 6-67 Remove the main and reversing-unit fans (8 of 9).......................................................................191
Figure 6-68 Remove the main and reversing-unit fans (9 of 9).......................................................................192
Figure 6-69 Remove the thermistor (1 of 4)....................................................................................................193
Figure 6-70 Remove the thermistor (2 of 4)....................................................................................................193
Figure 6-71 Remove the thermistor (3 of 4)....................................................................................................194
Figure 6-72 Remove the thermistor (4 of 4)....................................................................................................194
Figure 6-73 Remove the jam-access-cover switch (1 of 3).............................................................................195
Figure 6-74 Remove the jam-access-cover switch (2 of 3).............................................................................195
Figure 6-75 Remove the jam-access-cover switch (3 of 3).............................................................................196
Figure 6-76 Remove the tray 1 assembly (1 of 5)...........................................................................................197
Figure 6-77 Remove the tray 1 assembly (2 of 5)...........................................................................................197
Figure 6-78 Remove the tray 1 assembly (3 of 5)...........................................................................................198
Figure 6-79 Remove the tray 1 assembly (4 of 5)...........................................................................................198
Figure 6-80 Correct tray 1 rear-hinge-spring placement.................................................................................199
Figure 6-81 Remove the tray 1 assembly (5 of 5)...........................................................................................199
Figure 6-82 Remove the front-cover support (1 of 2)......................................................................................200
Figure 6-83 Remove the front-cover support (2 of 2)......................................................................................200
Figure 6-84 Remove the tray 1 feed-assembly (1 of 13).................................................................................201
Figure 6-85 Remove the tray 1 feed-assembly (2 of 13).................................................................................202
Figure 6-86 Remove the tray 1 feed-assembly (3 of 13).................................................................................202
Figure 6-87 Remove the tray 1 feed-assembly (4 of 13).................................................................................203
Figure 6-88 Remove the tray 1 feed-assembly (5 of 13).................................................................................203
Figure 6-89 Remove the tray 1 feed-assembly (6 of 13).................................................................................204
Figure 6-90 Remove the tray 1 feed-assembly (7 of 13).................................................................................204
Figure 6-91 Remove the tray 1 feed-assembly (8 of 13).................................................................................205
Figure 6-92 Remove the tray 1 feed-assembly (9 of 13).................................................................................205
Figure 6-93 Remove the tray 1 feed-assembly (10 of 13)...............................................................................206
Figure 6-94 Remove the tray 1 feed-assembly (11 of 13)...............................................................................206
Figure 6-95 Remove the tray 1 feed-assembly (12 of 13)...............................................................................207
Figure 6-96 Remove the tray 1 feed-assembly (13 of 13)...............................................................................207
Figure 6-97 Remove the feed-roller assembly (1 of 4)....................................................................................208
Figure 6-98 Remove the feed-roller assembly (2 of 4)....................................................................................208
Figure 6-99 Remove the feed-roller assembly (3 of 4)....................................................................................209
xxiii
Figure 6-100 Remove the feed-roller assembly (4 of 4)....................................................................................209
Figure 6-101 Sensor-flag spring placement......................................................................................................210
Figure 6-102 Remove the dc controller (1 of 6).................................................................................................211
Figure 6-103 Remove the dc controller (2 of 6).................................................................................................211
Figure 6-104 Remove the dc controller (3 of 6).................................................................................................212
Figure 6-105 Remove the dc controller (4 of 6).................................................................................................212
Figure 6-106 Remove the dc controller (5 of 6).................................................................................................213
Figure 6-107 Remove the dc controller (6 of 6).................................................................................................213
Figure 6-108 Remove the main motor...............................................................................................................214
Figure 6-109 Remove the dc controller fan (1 of 3)...........................................................................................215
Figure 6-110 Remove the dc controller fan (2 of 3)...........................................................................................215
Figure 6-111 Remove the dc controller fan (3 of 3)...........................................................................................216
Figure 6-112 Remove the print-cartridge fan (1 of 4)........................................................................................217
Figure 6-113 Remove the print-cartridge fan (2 of 4)........................................................................................217
Figure 6-114 Remove the print-cartridge fan (3 of 4)........................................................................................218
Figure 6-115 Remove the print-cartridge fan (4 of 4)........................................................................................218
Figure 6-116 Remove the print-cartridge motor (1 of 4)....................................................................................219
Figure 6-117 Remove the print-cartridge motor (2 of 4)....................................................................................219
Figure 6-118 Remove the print-cartridge motor (3 of 4)....................................................................................220
Figure 6-119 Remove the print-cartridge motor (4 of 4)....................................................................................220
Figure 6-120 Remove the top-cover switch (1 of 3)..........................................................................................221
Figure 6-121 Remove the top-cover switch (2 of 3)..........................................................................................222
Figure 6-122 RRemove the top-cover switch (3 of 3)........................................................................................222
Figure 6-123 Remove the registration assembly (1 of 6)..................................................................................223
Figure 6-124 Remove the registration assembly (2 of 6)..................................................................................224
Figure 6-125 Remove the registration assembly (3 of 6)..................................................................................224
Figure 6-126 Remove the registration assembly (4 of 6)..................................................................................225
Figure 6-127 Remove the registration assembly (5 of 6)..................................................................................225
Figure 6-128 Remove the registration assembly (6 of 6)..................................................................................226
Figure 6-129 Remove the paper-pickup-drive assembly (1 of 6)......................................................................227
Figure 6-130 Remove the paper-pickup-drive assembly (2 of 6)......................................................................227
Figure 6-131 Remove the paper-pickup-drive assembly (3 of 6)......................................................................228
Figure 6-132 Remove the paper-pickup-drive assembly (4 of 6)......................................................................228
Figure 6-133 Remove the paper-pickup-drive assembly (5 of 6)......................................................................229
Figure 6-134 Remove the paper pickup drive assembly (6 of 6) .....................................................................229
Figure 6-135 Cassette feed-roller shaft (push here while replacing the gear)..................................................230
Figure 6-136 Remove the lifter-drive assembly (1 of 5)....................................................................................231
Figure 6-137 Remove the lifter-drive assembly (2 of 5)....................................................................................231
Figure 6-138 Remove the lifter-drive assembly (3 of 5)....................................................................................232
Figure 6-139 Remove the lifter-drive assembly (4 of 5)....................................................................................232
Figure 6-140 Remove the lifter-drive assembly (5 of 5)....................................................................................233
Figure 6-141 Remove the PFC power supply (1 of 8).......................................................................................234
Figure 6-142 Remove the PFC power supply (2 of 8).......................................................................................235
Figure 6-143 Remove the PFC power supply (3 of 8).......................................................................................235
Figure 6-144 Remove the PFC power supply (4 of 8).......................................................................................236
Figure 6-145 Remove the PFC power supply (5 of 8).......................................................................................236
Figure 6-146 Remove the PFC power supply (6 of 8).......................................................................................237
Figure 6-147 Remove the PFC power supply (7 of 8).......................................................................................237
Figure 6-148 Remove the PFC power supply (8 of 8).......................................................................................238
Figure 6-149 Remove the engine power supply (1 of 10).................................................................................239
xxiv
Figure 6-150 Remove the engine power supply (2 of 10).................................................................................240
Figure 6-151 Remove the engine power supply (3 of 10).................................................................................240
Figure 6-152 Remove the engine power supply (4 of 10).................................................................................241
Figure 6-153 Remove the engine power supply (5 of 10).................................................................................241
Figure 6-154 Remove the engine power supply (6 of 10).................................................................................242
Figure 6-155 Remove the engine power supply (7 of 10).................................................................................242
Figure 6-156 Remove the engine power supply (8 of 10).................................................................................243
Figure 6-157 Remove the engine power supply (9 of 10).................................................................................243
Figure 6-158 Remove the engine power supply (10 of 10)...............................................................................244
Figure 6-159 Remove the paper-feed assembly (1 of 2) ..................................................................................245
Figure 6-160 Remove the paper-feed assembly (2 of 2)...................................................................................246
Figure 6-161 Remove the tray 2 detection switch.............................................................................................247
Figure 6-162 Remove the paper-size-detection switch (1 of 2).........................................................................248
Figure 6-163 Remove the tray 2 paper-present sensor....................................................................................249
Figure 6-164 Remove the laser/scanner (1 of 2) ..............................................................................................250
Figure 6-165 Remove the laser/scanner (1 of 2)...............................................................................................251
Figure 6-166 Remove the output-bin-full sensor...............................................................................................252
Figure 6-167 Incorrect installation of the output-bin-full sensor........................................................................253
Figure 6-168 Correct installation of the output-bin-full sensor...........................................................................253
Figure 6-169 Remove the ADF assembly (1 of 3).............................................................................................254
Figure 6-170 Remove the ADF assembly (2 of 3).............................................................................................255
Figure 6-171 Remove the ADF assembly (3 of 3).............................................................................................255
Figure 6-172 Remove the scanner assembly (1 of 8).......................................................................................256
Figure 6-173 Remove the scanner assembly (2 of 8).......................................................................................256
Figure 6-174 Remove the scanner assembly (3 of 8).......................................................................................257
Figure 6-175 Remove the scanner assembly (4 of 8).......................................................................................258
Figure 6-176 Remove the scanner assembly (5 of 8).......................................................................................258
Figure 6-177 Remove the scanner assembly (6 of 8).......................................................................................259
Figure 6-178 Remove the scanner assembly (7 of 8).......................................................................................259
Figure 6-179 Remove the scanner assembly (8 of 8).......................................................................................260
Figure 6-180 Correctly positioning the scanner assembly................................................................................260
Figure 6-181 Remove the scanner glass (1 of 6)..............................................................................................261
Figure 6-182 Remove the scanner glass (2 of 6)..............................................................................................261
Figure 6-183 Remove the scanner glass (1 of 6)..............................................................................................262
Figure 6-184 Remove the scanner glass (4 of 6)..............................................................................................262
Figure 6-185 Remove the scanner glass (5 of 6)..............................................................................................263
Figure 6-186 Remove the scanner glass (6 of 6)..............................................................................................263
Figure 6-187 Remove the optical unit (1 of 7)...................................................................................................264
Figure 6-188 Remove the optical unit (2 of 7)...................................................................................................265
Figure 6-189 Remove the optical unit (3 of 7)...................................................................................................265
Figure 6-190 Remove the optical unit (4 of 7)...................................................................................................266
Figure 6-191 Remove the optical unit (5 of 7)...................................................................................................267
Figure 6-192 Remove the optical unit (6 of 7)...................................................................................................267
Figure 6-193 Remove the optical unit (7 of 7)...................................................................................................268
Figure 6-194 Remove the scanner bulb (1 of 2)................................................................................................269
Figure 6-195 Remove the scanner bulb (2 of 2)................................................................................................269
Figure 6-196 Remove the inverter PCA............................................................................................................270
Figure 6-197 Remove the scanner fan..............................................................................................................271
Figure 6-198 Remove the scanner home-position sensor................................................................................272
Figure 6-199 Reinstalling the scanner home-position sensor...........................................................................273
xxv
Figure 6-200 Remove the scanner-controller PCA (1 of 2)...............................................................................274
Figure 6-201 Remove the scanner-controller PCA (2 of 2)...............................................................................274
Figure 6-202 Remove the ADF output-bin extension (1 of 2)............................................................................276
Figure 6-203 Remove the ADF output-bin extension (2 of 2)............................................................................277
Figure 6-204 Remove the ADF white mylar-backing (1 of 3)............................................................................278
Figure 6-205 Remove the ADF white mylar-backing (2 of 3)............................................................................278
Figure 6-206 Remove the ADF white mylar-backing (3 of 3)............................................................................279
Figure 6-207 Reinstall the ADF white mylar-backing springs............................................................................279
Figure 6-208 Remove the ADF front cover (1 of 2)...........................................................................................280
Figure 6-209 Remove the ADF front cover (2 of 2)...........................................................................................280
Figure 6-210 Remove the ADF rear cover (1 of 2)............................................................................................281
Figure 6-211 Remove the ADF rear cover (2 of 2)............................................................................................281
Figure 6-212 Remove the ADF left cover (1 of 2)..............................................................................................282
Figure 6-213 Remove the ADF left cover (2 of 2)..............................................................................................283
Figure 6-214 Remove the ADF jam-access cover and latch (1 of 3)................................................................284
Figure 6-215 Remove the ADF jam-access cover and latch (2 of 3)................................................................285
Figure 6-216 Remove the ADF leading-edge and paper-present sensors (1 of 2)...........................................286
Figure 6-217 Remove the ADF leading-edge and paper-present sensors (2 of 2)...........................................286
Figure 6-218 Remove the ADF hinges (1 of 2)..................................................................................................287
Figure 6-219 Remove the ADF hinges (2 of 2)..................................................................................................288
Figure 6-220 Remove the 500-sheet-feeder rear cover (1 of 2).......................................................................290
Figure 6-221 Remove the 500-sheet-feeder rear cover (2 of 2).......................................................................290
Figure 6-222 Remove the 500-sheet-feeder right cover...................................................................................291
Figure 6-223 Remove the 500-sheet-feeder front cover (1 of 3).......................................................................292
Figure 6-224 Remove the 500-sheet-feeder front cover (2 of 3).......................................................................292
Figure 6-225 Remove the 500-sheet-feeder front cover (3 of 3).......................................................................293
Figure 6-226 Remove the 500-sheet-feeder upper-left cover...........................................................................294
Figure 6-227 Remove the 500-sheet-feeder left-side cover..............................................................................295
Figure 6-228 Remove the 500-sheet-feeder number-plate assembly...............................................................296
Figure 6-229 Remove the 500-sheet-cassette front cover ...............................................................................297
Figure 6-230 Remove the 500-sheet-feeder PCA.............................................................................................298
Figure 6-231 Remove the 500-sheet-feeder lifter-drive assembly....................................................................299
Figure 6-232 Remove the 500-sheet-feeder paper-size switch (1 of 2)............................................................300
Figure 6-233 Remove the 500-sheet-feeder paper-size switch (2 of 2)............................................................301
Figure 6-234 Remove the 500-sheet-feeder jam-access-cover-open switch (1 of 2).......................................302
Figure 6-235 Remove the 500-sheet-feeder jam-access-cover-open switch (2 of 2).......................................302
Figure 7-1 Engine-test-print switch................................................................................................................399
Figure 7-2 DC controller component connections.........................................................................................430
Figure 7-3 Scanner-controller PCA component connections........................................................................432
Figure 7-4 Cassette sensors..........................................................................................................................435
Figure 7-5 Sensors in the print-cartridge area...............................................................................................436
Figure 7-6 Sensors on the reversing unit (top side)......................................................................................437
Figure 7-7 Sensors in the interior of the MFP................................................................................................438
Figure 7-8 Output-bin detection switch, SW103............................................................................................439
Figure 7-9 Tray 1 paper-present sensor, PS105...........................................................................................439
Figure 7-10 Top-cover switch, SW101............................................................................................................440
Figure 7-11 Tray 2 jam-access-cover switch, SW105.....................................................................................440
Figure 7-12 Front-side fans.............................................................................................................................441
Figure 7-13 Rear-side fans..............................................................................................................................442
Figure 7-14 Rear-side motors (1 of 2).............................................................................................................443
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Figure 7-15 Rear-side motors (2 of 2).............................................................................................................444
Figure 7-16 Rear-side solenoid.......................................................................................................................444
Figure 7-17 Reversing-unit motors and solenoids...........................................................................................445
Figure 7-18 Right, rear corner components (1 of 2)........................................................................................446
Figure 7-19 Right, rear corner components (2 of 2)........................................................................................447
Figure 7-20 ADF output-bin-full sensor...........................................................................................................448
Figure 7-21 ADF pickup assembly sensors.....................................................................................................449
Figure 7-22 ADF motors, solenoid, and sensors.............................................................................................450
Figure 7-23 General timing chart (1 of 2)........................................................................................................451
Figure 7-24 General timing chart (2 of 2)........................................................................................................452
Figure 7-25 General circuit diagram (1 of 2)....................................................................................................453
Figure 7-26 General circuit diagram (2 of 2)....................................................................................................454
Figure 7-27 Circuit diagram for the 500-sheet feeder.....................................................................................455
Figure 7-28 Circuit diagram for the scanner....................................................................................................456
Figure 8-1 Accessories..................................................................................................................................460
Figure 8-2 Customer-replaceable components (print engine).......................................................................462
Figure 8-3 Customer-replaceable components (ADF and scanner).............................................................464
Figure 8-4 Cables and interfaces...................................................................................................................466
Figure 8-5 Control panel and control-panel overlays....................................................................................468
Figure 8-6 Memory.........................................................................................................................................470
Figure 8-7 Print cartridge and maintenance kits............................................................................................472
Figure 8-8 Documentation, software, and training material...........................................................................474
Figure 8-9 Print-engine assemblies (1 of 2)..................................................................................................476
Figure 8-10 Print-engine assemblies (2 of 2)..................................................................................................478
Figure 8-11 External panels and covers..........................................................................................................480
Figure 8-12 Upper-plate assembly..................................................................................................................482
Figure 8-13 Internal components (1 of 5)........................................................................................................484
Figure 8-14 Internal components (2 of 5)........................................................................................................486
Figure 8-15 Internal components (3 of 5)........................................................................................................488
Figure 8-16 Internal components (4 of 5)........................................................................................................490
Figure 8-17 Internal components (5 of 5)........................................................................................................492
Figure 8-18 Electrical/forward assembly.........................................................................................................494
Figure 8-19 Main drive assembly.....................................................................................................................496
Figure 8-20 Paper-pickup-drive assembly.......................................................................................................498
Figure 8-21 Lifter-drive assembly....................................................................................................................500
Figure 8-22 Cassette.......................................................................................................................................502
Figure 8-23 Paper-feed roller assembly..........................................................................................................504
Figure 8-24 Registration assembly..................................................................................................................506
Figure 8-25 Multipurpose assembly.................................................................................................................508
Figure 8-26 Reverse assembly........................................................................................................................510
Figure 8-27 Reverse-separation-guide assembly............................................................................................512
Figure 8-28 Delivery assembly........................................................................................................................514
Figure 8-29 Fuser............................................................................................................................................516
Figure 8-30 ADF assembly..............................................................................................................................518
Figure 8-31 ADF internal components (1 of 3)................................................................................................520
Figure 8-32 ADF internal components (2 of 3)................................................................................................522
Figure 8-33 ADF internal components (3 of 3)................................................................................................524
Figure 8-34 ADF input tray..............................................................................................................................526
Figure 8-35 ADF separation pad.....................................................................................................................528
Figure 8-36 ADF separation-pad case............................................................................................................530
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Figure 8-37 ADF pickup-roller assembly.........................................................................................................532
Figure 8-38 ADF pickup-roller cover................................................................................................................534
Figure 8-39 ADF mylar-holder assembly.........................................................................................................536
Figure 8-40 ADF mylar replacement kit...........................................................................................................538
Figure 8-41 Scanner glass and cover..............................................................................................................540
Figure 8-42 Scanner-base components..........................................................................................................542
Figure 8-43 Scanner flatbed-unit assembly.....................................................................................................544
Figure 8-44 Scanner covers............................................................................................................................546
Figure 8-45 Scanner-carriage-lock assembly..................................................................................................548
Figure 8-46 Scanner-open-sensor assembly..................................................................................................550
Figure 8-47 Scanner-motor fan........................................................................................................................552
Figure 8-48 Scanner motor..............................................................................................................................554
Figure 8-49 Scanner-belt assembly.................................................................................................................556
Figure 8-50 Scanner slide-rail..........................................................................................................................558
Figure 8-51 Scanner optical assembly............................................................................................................560
Figure 8-52 500-sheet feeder assembly locations..........................................................................................562
Figure 8-53 500-sheet feeder external components.......................................................................................564
Figure 8-54 500-sheet feeder main body (1 of 2)............................................................................................566
Figure 8-55 500-sheet feeder main body (2 of 2)............................................................................................568
Figure 8-56 500-sheet feeder lifter-drive assembly.........................................................................................570
Figure 8-57 500-sheet feeder cassette............................................................................................................572
Figure 8-58 Duplex-printing assembly.............................................................................................................574
Figure 8-59 Stapler/stacker accessory............................................................................................................576
Figure 8-60 3-bin mailbox accessory...............................................................................................................578
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