HP Color LaserJet 4730mfp Service Manual

HP Color LaserJet 4730mfp

Service Manual

HP Color LaserJet 4730mfp series

Service Manual

Copyright and License

© 2005 Copyright Hewlett-Packard

Development Company, L.P.

Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.

The information contained in this document is subject to change without notice.

The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Part number Q7517-90970

Edition 1, 9/2005

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Windows®, MS Windows®, and Windows NT® are U.S. registered trademarks of Microsoft Corporation.

Table of contents

1 Product information
HP Color LaserJet 4730mfp series configurations..................................................................................	2
HP Color LaserJet 4730mfp (Q7517A)...................................................................................	2
HP Color LaserJet 4730x mfp (Q7518A)................................................................................	3
HP Color LaserJet 4730xs mfp (Q7519A)..............................................................................	3
HP Color LaserJet 4730xm mfp (Q7520A).............................................................................	4
Features and benefits of the MFP...........................................................................................................	5
Functions.................................................................................................................................	5
Speed and throughput............................................................................................................	5
Resolution...............................................................................................................................	5
Memory...................................................................................................................................	5
User interface..........................................................................................................................	5
Language and fonts ...............................................................................................................	6
Copying and sending..............................................................................................................	6
Print cartridges........................................................................................................................	6
Paper handling........................................................................................................................	6
Connectivity.............................................................................................................................	7
Environmental features...........................................................................................................	7
Security features.....................................................................................................................	7
Minimum system requirements for e-mail functionality..........................................................	8
MFP parts and accessories.....................................................................................................................	9
MFP parts................................................................................................................................	9
Interface ports.......................................................................................................................	11
Model and serial numbers....................................................................................................	11
Accessories and supplies.....................................................................................................	12
Parts compatibility with other HP LaserJet products............................................................	13
Moving the MFP....................................................................................................................	14
Site requirements...................................................................................................................................	15
Physical specifications..........................................................................................................	15
Environmental specifications................................................................................................	15
MFP specifications................................................................................................................................	16
Electrical specifications.........................................................................................................	16
Acoustic specifications..........................................................................................................	17
Image area............................................................................................................................	17
Skew specifications...............................................................................................................	17
Media specifications..............................................................................................................................	18
Printing and paper storage environment..............................................................................	18
Envelopes.............................................................................................................................	19
Envelopes that have double side seams.............................................................	20
Envelopes that have adhesive strips or flaps......................................................	20

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Envelope margins................................................................................................	20
Envelope storage.................................................................................................	20
Labels....................................................................................................................................	21
Label construction................................................................................................	21
Transparencies.....................................................................................................................	21
Supported types and sizes of print media............................................................................	22
Printing on special media......................................................................................................................	27
Transparencies.....................................................................................................................	27
Glossy paper.........................................................................................................................	27
Colored paper.......................................................................................................................	28
Envelopes.............................................................................................................................	28
Labels....................................................................................................................................	28
Heavy paper..........................................................................................................................	29
HP LaserJet Tough paper.....................................................................................................	29
Preprinted forms and letterhead...........................................................................................	29
Recycled paper.....................................................................................................................	30
Weight equivalence table......................................................................................................	30
Regulatory information..........................................................................................................................	32
FCC and Telecom regulations..............................................................................................	32
FCC regulations...................................................................................................	32
Telecom................................................................................................................	32
Environmental Product Stewardship program......................................................................	33
Protecting the environment..................................................................................	33
Ozone production.................................................................................................	33
Energy consumption............................................................................................	33
HP LaserJet printing supplies..............................................................................	33
Disposal of waste equipment by users in private households in the
European Union...................................................................................................	35
Material safety data sheet....................................................................................	35
For more information............................................................................................	35
Country/region-specific safety statements............................................................................	36
Laser safety statement.........................................................................................	36
Canadian DOC statement....................................................................................	36
Japanese VCCI statement...................................................................................	36
Korean EMI statement.........................................................................................	37
Japanese cordset statement................................................................................	37
Taiwan safety statement......................................................................................	37
Finnish laser statement........................................................................................	38
Australia...............................................................................................................	38
Declaration of conformity (HP Color LaserJet 4730mfp)......................................................................	39
2 Service approach
Service approach...................................................................................................................................	42
Parts and supplies.................................................................................................................................	43
Ordering parts, supplies, and accessories over the Internet................................................	43
Ordering directly through the embedded Web server (for MFPs with network
connections)..........................................................................................................................	43
Exchange program................................................................................................................	43
Supplies................................................................................................................................	43
World Wide Web...................................................................................................................	43

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HP Service Parts Information...............................................................................................	44
HP available services............................................................................................................................	45
Hewlett-Packard Limited Warranty Statement......................................................................................	47
Print Cartridge Limited Warranty Statement.........................................................................................	48
HP maintenance agreements................................................................................................................	49
Priority Onsite Service..........................................................................................................	49
Next business day.................................................................................................................	49
Installation and maintenance kit replacement......................................................................	49
3 Installation and configuration
Installation checklist...............................................................................................................................	52
Unpacking the MFP...............................................................................................................................	54
Loading detectable standard-sized media into Tray 2, 3, and 4...........................................................	57
Loading undetectable standard-sized media into Tray 2, 3, and 4.......................................................	59
Connecting power..................................................................................................................................	62
Installing print cartridges........................................................................................................................	63
Installing a new control panel overlay...................................................................................................	65
Testing the MFP operation....................................................................................................................	66
Sleep delay............................................................................................................................................	67
Setting Sleep delay...............................................................................................................	67
Disabling/enabling Sleep mode............................................................................................	67
Connecting to a computer or network...................................................................................................	68
Network connection..............................................................................................................	68
Parallel connection................................................................................................................	68
Fax connection......................................................................................................................	69
Analog faxing........................................................................................................	69
Connecting the fax accessory to a phone line....................................	69
Configuring and using the fax features...............................................	70
Digital faxing.........................................................................................................	70
Printer software......................................................................................................................................	71
Software................................................................................................................................	71
Software features.................................................................................................	71
Driver Autoconfiguration.......................................................................................	71
Update Now..........................................................................................................	71
HP Driver Preconfiguration..................................................................................	72
Installing the printing system software..................................................................................	72
Installing Windows printing system software for direct connections....................	72
Installing Windows printing system software for networks..................................	73
Setting up a Windows computer to use the network MFP with Windows-
sharing..................................................................................................................	74
Installing the software after the parallel or USB cable has been connected.......	74
Uninstalling the software.......................................................................................................	74
Removing software from Windows operating systems........................................	75
Software for networks...........................................................................................................	75
HP Web Jetadmin................................................................................................	75
UNIX.....................................................................................................................	76
Utilities...................................................................................................................................	76
Embedded Web server........................................................................................	76
Features..............................................................................................	76
Other components and utilities............................................................................	77

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Printer drivers........................................................................................................................................	78
Supported printer drivers......................................................................................................	78
Additional drivers..................................................................................................................	78
Selecting the correct printer driver........................................................................................	79
Printer driver Help (Windows)...............................................................................................	79
Gaining access to Windows printer drivers..........................................................................	80
Printer drivers for Macintosh computers................................................................................................	81
Supported Macintosh printer drivers.....................................................................................	81
Gaining access to Macintosh printer drivers.........................................................................	81
Software for Macintosh computers........................................................................................................	83
Installing Macintosh printing system software for networks.................................................	83
Installing Macintosh printing system software for direct connections (USB)........................	84
To remove software from Macintosh operating systems......................................................	85
Network configuration............................................................................................................................	86
Configuring TCP/IP parameters............................................................................................	86
To manually configure TCP/IP parameters from the MFP control panel.............	86
Setting an IP address...........................................................................................	86
Setting the subnet mask.......................................................................................	87
Setting the default gateway..................................................................................	87
Disabling network protocols (optional).................................................................	88
Disabling IPX/SPX...............................................................................................	88
Disabling DLC/LLC...............................................................................................	88
Disabling AppleTalk.............................................................................................	89
Security features....................................................................................................................................	90
Securing the embedded Web server....................................................................................	90
To secure the embedded Web server..................................................................	90
Foreign Interface Harness (FIH)...........................................................................................	90
Requirements.......................................................................................................	90
Using the FIH.......................................................................................................	90
To enable the FIH portal......................................................................	90
To disable the FIH portal.....................................................................	91
Secure Disk Erase................................................................................................................	91
Data affected........................................................................................................	91
Gaining access to Secure Disk Erase..................................................................	92
Additional Information..........................................................................................	92
Job storage features.............................................................................................................	92
DSS authentication...............................................................................................................	92
Locking the control panel menus..........................................................................................	92
Locking the formatter cage...................................................................................................	93
Optional output and input devices.........................................................................................................	94
4 Maintenance
Using the cleaning page........................................................................................................................	96
Cleaning the MFP..................................................................................................................................	97
Cleaning the outside of the MFP..........................................................................................	97
Cleaning the touchscreen.....................................................................................................	97
Cleaning the scanner glass..................................................................................................	97
Cleaning the ADF delivery system........................................................................................	97
To clean the ADF delivery system.......................................................................	98
To clean the ADF rollers......................................................................................	99

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Cleaning the mylar strip......................................................................................................	102
To clean the mylar strip......................................................................................	102
Calibrating the scanner........................................................................................................................	104
To print the calibration target..............................................................................................	104
Performing preventive maintenance....................................................................................................	105
MFP preventive maintenance.............................................................................................	105
To reset the maintenance kit counter.................................................................	105
ADF maintenance kit...........................................................................................................	106
Managing print cartridges....................................................................................................................	107
HP print cartridges..............................................................................................................	107
Changing print cartridges....................................................................................................	107
Replacing a print cartridge.................................................................................	107
Non-HP print cartridges......................................................................................................	110
Print cartridge authentication..............................................................................................	110
Print cartridge storage........................................................................................................	111
Print cartridge life expectancy.............................................................................................	111
Checking the supply level...................................................................................................	111
Using the product control panel.........................................................................	111
Using the embedded Web server......................................................................	111
Using HP Web Jetadmin....................................................................................	111
Printing a supplies status page..........................................................................	111
Approximate replacement intervals for supplies.................................................................................	113
ETB life under different circumstances................................................................................................	114
Changing print cartridges....................................................................................................................	115
Replacing print cartridges...................................................................................................	115
Replacing supplies..............................................................................................................................	116
Locating supplies................................................................................................................	116
Supply replacement guidelines...........................................................................................	116
Making room around the MFP for replacing supplies.........................................................	117
Replacing the stapler cartridge...........................................................................................	117
Replacing the ETB..............................................................................................................	119
Replacing the fuser.............................................................................................................	119
MFP memory and fonts.......................................................................................................................	120
Installing memory and fonts.................................................................................................................	121
Installing DDR memory DIMMs..........................................................................................	121
Installing a flash memory card............................................................................................	126
Enabling memory................................................................................................................	129
To enable memory for Windows 98 and Windows Me......................................	129
To enable memory for Windows 2000 and Windows XP..................................	129
Setting the real-time clock...................................................................................................................	130
Setting the date and time....................................................................................................	130
To set the date format........................................................................................	130
To set the date...................................................................................................	130
To set the time format........................................................................................	130
To set the time...................................................................................................	131
Setting the wake time.........................................................................................................	131
To set the wake time..........................................................................................	131
Setting the Sleep delay.......................................................................................................	132
To set the Sleep delay.......................................................................................	132
Configuring and verifying an IP address.............................................................................................	133

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TCP/IP assignment.............................................................................................................	133
Automatic discovery...........................................................................................	133
Dynamic host configuration protocol (DHCP)....................................................	133
Verifying the TCP/IP configuration.....................................................................................	133
Changing an IP address.....................................................................................................	133
To change an IP address by using HP Web Jetadmin......................................	133
To change an IP address by using the embedded Web server........................	134
To change an IP address by using the control panel........................................	134
Upgrading the firmware.......................................................................................................................	136
Determining the current level of firmware...........................................................................	136
Downloading the new firmware from the HP Web site.......................................................	136
Transferring the new firmware to the MFP.........................................................................	136
Using FTP to upload the firmware through a browser.......................................	136
To use a browser for firmware update..............................................	136
Using FTP to upgrade the firmware on a network connection...........................	137
To upgrade the firmware on a network connection by using FTP....	137
Using HP Web Jetadmin to upgrade the firmware............................................	138
Using MS-DOS commands to upgrade the firmware........................................	139
Upgrading the HP Jetdirect firmware..................................................................................	140
5 Theory of operation
Basic operation....................................................................................................................................	142
Operation sequence............................................................................................................	143
Operation sequence (scanner)...........................................................................................	143
Power on sequence............................................................................................................	144
Formatter system.................................................................................................................................	146
Sleep mode.........................................................................................................................	146
Image Resolution Enhancement technology (REt)............................................................	147
Input/Output........................................................................................................................	147
Parallel interface................................................................................................	147
USB 2.0 connector.............................................................................................	147
ACC accessory port...........................................................................................	147
Flash...................................................................................................................	148
Hard disk............................................................................................................	148
CPU....................................................................................................................	148
FIH (foreign interface harness)..........................................................................	148
MFP memory......................................................................................................................	148
Read-only memory.............................................................................................	148
Random-access memory...................................................................................	148
DIMM slots..........................................................................................................................	148
Flash memory....................................................................................................	148
Nonvolatile memory...........................................................................................	149
PJL overview.......................................................................................................................	149
PML.....................................................................................................................................	149
Control panel.......................................................................................................................	149
Scanner interface................................................................................................................	149
Engine control system.........................................................................................................................	150
DC controller PCB...............................................................................................................	150
Block operation..................................................................................................	152
Motors, fans, and environment sensor...............................................................................	152

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Failure detection.................................................................................................................	154
Drum motor failure detection..............................................................................	155
Fuser motor failure detection.............................................................................	155
ETB motor failure detection...............................................................................	155
Rear exhaust fan failure detection.....................................................................	155
Cartridge fan failure detection............................................................................	155
Delivery fan failure detection..............................................................................	155
Power supply fan failure detection.....................................................................	156
Scanner fan failure detection.............................................................................	156
ADF fan failure detection....................................................................................	156
Control fans #1 and #2 failure detection............................................................	156
Sub power supply fan failure detection..............................................................	156
ETB fan failure detection....................................................................................	156
Low-voltage power supply..................................................................................................	156
Fuser control circuit............................................................................................	157
Low-voltage power supply circuit.......................................................................	159
Protective functions...........................................................................	160
Safety................................................................................................	160
Sleep mode.......................................................................................	160
Power supply recognition..................................................................	160
Heater temperature control.................................................................................................	160
Initial rotation temperature control.....................................................................	161
Start-up temperature control..............................................................................	161
Print temperature control....................................................................................	162
Between-sheets temperature control.................................................................	162
Temperature protective function.........................................................................................	162
Protective function by the CPU..........................................................................	162
Protective function by the fuser heater safety circuit.........................................	162
Protective function by the thermoswitch............................................................	163
Temperature failure detection.............................................................................................	163
Start-up failure (warm-up failure).......................................................................	163
Abnormal low temperature of main thermistor (no conduction).........................	163
Abnormal high temperature of main thermistor.................................................	163
Abnormal low temperature of sub thermistor (no conduction)...........................	163
Abnormal high temperature of sub thermistor...................................................	164
Drive circuit abnormality.....................................................................................	164
High-voltage power supply.................................................................................................	164
Generation of biases..........................................................................................	165
Sub power supply assembly...............................................................................................	167
Video interface control........................................................................................................	167
Laser/scanner system.........................................................................................................................	169
Laser control.......................................................................................................................	170
Scanner control...................................................................................................................	171
Image formation system......................................................................................................................	173
Image formation process....................................................................................................	174
Electrostatic latent image formation block..........................................................................	176
Step 1: Pre-exposure.........................................................................................	176
Step 2: Primary charging....................................................................................	177
Step 3: Laser beam exposure............................................................................	177
Development block.............................................................................................................	177

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Step 4: Development..........................................................................................	177
Transfer block.....................................................................................................................	178
Step 5: Attraction................................................................................................	178
Step 6: Transfer.................................................................................................	178
Step 7: Separation.............................................................................................	179
Fusing block........................................................................................................................	179
Step 8: Fusing....................................................................................................	179
Cleaning block....................................................................................................................	180
Step 9: Drum cleaning........................................................................................	180
Print cartridges....................................................................................................................	180
Memory tag........................................................................................................	182
Cartridge presence detection..............................................................................................	182
Memory tag detection.........................................................................................	182
Photosensitive drum detection...........................................................................	182
Developing cylinder disengaging control...........................................................	183
ETB (electrostatic transfer/transport belt)...........................................................................	183
Transfer roller (Y, C, M) engagement/disengagement detection.......................................	185
Transfer roller engagement/disengagement control...........................................................	185
Calibration and cleaning.....................................................................................................	186
ETB cleaning......................................................................................................	187
Color misregistration corrective control.............................................................	188
Color misregistration detection...........................................................................................	189
Image stabilization control..................................................................................................	190
Environmental change control...........................................................................	191
Image density calibration control (DMAX).........................................................	192
Image halftone calibration control (DHALF).......................................................	192
Image density detection.....................................................................................	192
Pickup/feed system.............................................................................................................................	194
Pickup/feed unit..................................................................................................................	199
Cassette detection and cassette media size detection......................................	199
Cassette pickup operation.................................................................................	200
Media lifting operation........................................................................................	200
Initial lift..............................................................................................	201
Lift-up during printing.........................................................................	201
Multiple-feed prevention.....................................................................................	202
Skew correction..................................................................................................	203
Media detection..................................................................................................	204
Feed speed control............................................................................................	205
Fusing and delivery block...................................................................................................	206
Loop control........................................................................................................	207
Fusing pressure release mechanism.................................................................	208
Duplex feed unit..................................................................................................................	209
Duplexing reverse/duplexing feed operation.....................................................	210
Jam detection......................................................................................................................	212
Pickup delay jam................................................................................................	213
Pickup stationary jam.........................................................................................	213
Delivery delay jam..............................................................................................	213
Door open jam....................................................................................................	213
Residual paper jam............................................................................................	214
Reversing unit jam 1..........................................................................................	214

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Reversing unit jam 2..........................................................................................	214
Duplexing pickup unit jam 1...............................................................................	214
Automatic delivery function................................................................................	214
Scanner system...................................................................................................................................	215
Electrical system.................................................................................................................	215
Motors and fans..................................................................................................................	216
Optical assembly.................................................................................................................	217
ADF feed system................................................................................................................	218
ADF jam detection..............................................................................................................	219
Residual media jam............................................................................................................	219
ADF pickup jam...................................................................................................................	219
ADF jam..............................................................................................................................	219
Registration sensor jam.....................................................................................	220
Read sensor jam................................................................................................	220
Exit sensor jam...................................................................................................	220
ADF cover-open jam...........................................................................................................	220
ADF open jam.....................................................................................................................	220
2 X 500-sheet paper feeder.................................................................................................................	221
Pickup and feed operations................................................................................................	222
2 X 500-sheet jam detection...............................................................................................	224
Output devices.....................................................................................................................................	225
IPTU....................................................................................................................................	225
IPTU transfer operation......................................................................................	226
IPTU jam detection.............................................................................................	228
Pickup delay jam...............................................................................	228
Pickup stationary jam........................................................................	228
Delivery delay jam.............................................................................	228
Delivery stationary jam......................................................................	228
3-bin mailbox.......................................................................................................................	228
Stacker mode.....................................................................................................	230
Mailbox mode.....................................................................................................	230
Function separator mode...................................................................................	230
3-bin mailbox jam detection...............................................................................	230
Feed delay jam..................................................................................	230
Feed stationary jam...........................................................................	231
Residual media jam...........................................................................	231
Stapler/stacker....................................................................................................................	231
Staple mode.......................................................................................................	233
Stacker mode.....................................................................................................	233
Staple jam detection...........................................................................................	233
Feed delay jam..................................................................................	233
Feed stationary jam...........................................................................	234
Delivery stationary jam......................................................................	234
Residual media jam...........................................................................	234
Stapler unit........................................................................................	234
6 Removal and replacement
Removal and replacement strategy.....................................................................................................	238
Required tools.....................................................................................................................	238
Before performing service...................................................................................................	239

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Removal and replacement sequencing..............................................................................	239
After completing service.....................................................................................................	241
Screws used in the MFP.....................................................................................................	242
User-replaceable parts........................................................................................................................	243
Print cartridges....................................................................................................................	244
Control panel overlays........................................................................................................	246
Control panel.......................................................................................................................	246
Intermediate paper transfer unit (IPTU)..............................................................................	247
Stapler/stacker....................................................................................................................	249
Staple cartridge...................................................................................................................	251
3-bin mailbox.......................................................................................................................	253
ETB assembly, removing....................................................................................................	254
MP tray pickup assembly....................................................................................................	257
Trays 2, 3, and 4.................................................................................................................	257
ADF input tray.....................................................................................................................	258
ADF pickup and feed rollers...............................................................................................	260
ADF separation pad............................................................................................................	262
ADF delivery guide (clear mylar sheet)..............................................................................	264
Face-down tray assembly...................................................................................................	266
Fuser...................................................................................................................................	267
Tray 2, 3, or 4 pickup and feed rollers................................................................................	268
MP tray pickup roller...........................................................................................................	269
Tray 2 separation roller.......................................................................................................	271
Tray 3 or 4 separation rollers..............................................................................................	273
Scanner filter cover and scanner filter................................................................................	274
ADF hinge flap....................................................................................................................	275
Formatter board..................................................................................................................	276
Hard drive...........................................................................................................................	277
DIMMs.................................................................................................................................	278
Flash memory card (firmware)............................................................................................	281
Fax accessory.....................................................................................................................	282
Covers, doors, and external panels.....................................................................................................	285
Face-down tray assembly...................................................................................................	287
Delivery cover assembly.....................................................................................................	287
Rear cover assembly..........................................................................................................	288
Left cover assembly............................................................................................................	290
Front cover assembly..........................................................................................................	291
Tray 1..................................................................................................................................	294
Right lower cover assembly................................................................................................	297
Delivery upper cover assembly...........................................................................................	300
Right front inner lower cover assembly..............................................................................	301
Left rear inner cover assembly...........................................................................................	301
Right front inner upper cover assembly..............................................................................	302
Right rear inner cover assembly.........................................................................................	304
Main assembly (internal assemblies)..................................................................................................	307
Paper feed assembly..........................................................................................................	310
Pickup drive assembly........................................................................................................	314
Lifter drive assembly...........................................................................................................	315
Disengaging drive assembly...............................................................................................	317
Main drive assembly...........................................................................................................	319

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Rail holder assembly...........................................................................................................	325
Rail guide assembly............................................................................................................	327
Formatter case assembly...................................................................................................	330
Laser/scanner components................................................................................................	336
Duplexing assembly............................................................................................................	343
Delivery assembly...............................................................................................................	345
Fuser drive assembly..........................................................................................................	353
Motors and fans...................................................................................................................................	354
Drum motors.......................................................................................................................	354
Fuser motor.........................................................................................................................	355
Fuser pressure release motor.............................................................................................	356
Developing disengaging motor...........................................................................................	361
Pickup motor assembly.......................................................................................................	362
Power supply fan................................................................................................................	363
Cartridge fan.......................................................................................................................	365
Sub power supply fan.........................................................................................................	366
Delivery fan.........................................................................................................................	368
Control fan 1.......................................................................................................................	369
Control fan 2.......................................................................................................................	370
Rear exhaust fan.................................................................................................................	371
ETB fan...............................................................................................................................	372
PCBs....................................................................................................................................................	376
DC controller PCB...............................................................................................................	376
Toner level PCB..................................................................................................................	381
High-voltage power supply PCB.........................................................................................	381
Low-voltage power supply PCB..........................................................................................	387
Memory controller PCB.......................................................................................................	392
Sub power supply PCB.......................................................................................................	393
Fan drive PCB.....................................................................................................................	395
Switches, contacts, and sensors.........................................................................................................	396
High-voltage contacts.........................................................................................................	396
E-label memory contacts and cable...................................................................................	397
Power switch assembly......................................................................................................	398
Door-open switch assembly................................................................................................	400
Environment sensor............................................................................................................	401
ADF and scanner components............................................................................................................	403
ADF assembly.....................................................................................................................	403
Top covers..........................................................................................................................	405
Scanner assembly..............................................................................................................	406
Scanner left cover...............................................................................................................	408
Scanner right cover.............................................................................................................	409
Scanner glass.....................................................................................................................	410
Optical assembly.................................................................................................................	411
Scanner bulb.......................................................................................................................	417
Inverter PCB.......................................................................................................................	419
Scanner fan.........................................................................................................................	420
Scanner home position sensor...........................................................................................	421
Scanner controller PCB......................................................................................................	423
ADF components.................................................................................................................................	424
ADF output bin extension...................................................................................................	425

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ADF white mylar backing....................................................................................................	426
ADF front cover...................................................................................................................	429
ADF rear cover ...................................................................................................................	430
ADF left side cover..............................................................................................................	432
ADF jam access cover and latch........................................................................................	433
ADF leading-edge and paper-present sensors..................................................................	435
ADF hinges.........................................................................................................................	436
2 X 500-sheet paper input assembly components..............................................................................	438
Rear cover..........................................................................................................................	439
Right front cover..................................................................................................................	440
Left front cover....................................................................................................................	441
Right cover..........................................................................................................................	442
Left cover............................................................................................................................	444
Right lower cover assembly................................................................................................	446
Pickup motor assembly.......................................................................................................	447
Upper lifter drive assembly.................................................................................................	448
Lower lifter drive assembly.................................................................................................	449
Upper pickup drive assembly..............................................................................................	451
Lower pickup drive assembly..............................................................................................	451
Upper pickup assembly......................................................................................................	452
Lower pickup assembly......................................................................................................	457
Paper feeder door-open switch...........................................................................................	460
Paper feeder driver PCB.....................................................................................................	462
Intermediate paper transfer unit (IPTU)...............................................................................................	463
Front cover and front door..................................................................................................	463
IPTU rear cover...................................................................................................................	466
Connector cover assembly.................................................................................................	467
IPTU driver PCB.................................................................................................................	468
IPTU driver motors..............................................................................................................	469
7 Troubleshooting
Introduction..........................................................................................................................................	472
Troubleshooting process.....................................................................................................................	473
Initial troubleshooting checklist...........................................................................................	473
Troubleshooting checklist..................................................................................	473
Troubleshooting flowchart...................................................................................................	475
Power-on checks................................................................................................................	477
Power-on troubleshooting overview...................................................................	477
Control panel messages......................................................................................................................	478
Using the MFP help system................................................................................................	478
Resolving control panel messages.....................................................................................	478
Accessory lights for the 3-bin mailbox and stapler/stacker.................................................................	519
Accessory lights..................................................................................................................	519
Formatter lights....................................................................................................................................	520
HP Jetdirect LEDs...............................................................................................................	520
Heartbeat LED....................................................................................................................	520
Fax LED..............................................................................................................................	521
Replacement parts configuration.........................................................................................................	522
Formatter and DC controller ..............................................................................................	522
Formatter (new or previously installed in another MFP) ....................................................	522

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DC controller (new or previously installed in another MFP)	..............................................522
Paper path troubleshooting.................................................................................................................	524
Jam locations......................................................................................................................	524
Paper jam recovery.............................................................................................................	526
To disable paper jam recovery...........................................................................	527
Clearing jams in the right covers........................................................................................	527
Jam in Tray 1......................................................................................................................	532
Jam in Tray 2, 3, or 4..........................................................................................................	533
Jam in the stapler/stacker...................................................................................................	535
Staple jams.........................................................................................................................	536
Jam in the 3-bin mailbox.....................................................................................................	538
Other jams in the output accessory bridge.........................................................................	540
Jam in the ADF...................................................................................................................	541
Solving repeated jams........................................................................................................	543
Persistent jams...................................................................................................................	544
Basic troubleshooting for jams...........................................................................	544
Data collection....................................................................................................	544
General paper path troubleshooting..................................................................	544
Paper path checklist...........................................................................................	545
Jams in Tray 1....................................................................................................	545
Jams in tray 2.....................................................................................................	546
Jams in Tray 3....................................................................................................	547
Jams in Tray 4....................................................................................................	548
Jams in the paper path.......................................................................................	548
Jams in the right upper cover.............................................................................	549
Jams in the duplex path.....................................................................................	550
Jams in the ADF.................................................................................................................	550
Jams in the IPTU................................................................................................................	551
Jams in the stapler/stacker.................................................................................................	551
Jams in the 3-bin mailbox...................................................................................................	552
Using the paper path test....................................................................................................	553
Using the scanner tests......................................................................................................	553
Correcting print quality and copy quality problems.............................................................................	554
Print quality problems associated with media.....................................................................	554
Overhead transparency defects..........................................................................................	554
Print quality problems associated with the environment....................................................	555
Print quality problems associated with jams.......................................................................	555
Understanding color variations...........................................................................................	555
Common causes of color variation.....................................................................	555
Using color..........................................................................................................................	556
HP ImageREt 3600............................................................................................	556
Paper selection..................................................................................................	556
sRGB..................................................................................................................	556
Color options.......................................................................................................................	557
Print in grayscale................................................................................................	557
Automatic or manual color adjustment..............................................................	557
Manual color options..........................................................................................	557
Halftone options.................................................................................................	558
Neutral grays......................................................................................................	558
Edge control.......................................................................................................	558

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RGB color...........................................................................................................	558
Adjusting color balance.......................................................................................................	559
To adjust color balance......................................................................................	559
Color selection process......................................................................................................	559
Matching colors...................................................................................................................	559
PANTONE® color matching...............................................................................	559
Swatch book color matching..............................................................................	559
Print quality troubleshooting pages....................................................................................	560
Print quality troubleshooting tool.........................................................................................	560
Image defects.....................................................................................................................	560
Light image.........................................................................................................	562
Light color...........................................................................................................	563
Dark image.........................................................................................................	563
Dark color...........................................................................................................	564
Completely blank image.....................................................................................	564
All black or solid color........................................................................................	564
Dots in vertical lines...........................................................................................	565
Dirt on the back of the paper..............................................................................	565
Dirt on the front of the paper..............................................................................	566
Vertical lines.......................................................................................................	567
White vertical lines.............................................................................................	567
Horizontal lines...................................................................................................	568
White horizontal lines.........................................................................................	568
Missing color......................................................................................................	568
Blank spots.........................................................................................................	569
Poor fusing.........................................................................................................	570
Distortion or blurring...........................................................................................	570
Smearing............................................................................................................	571
Misplaced image................................................................................................	572
Repetitive defects troubleshooting.....................................................................	572
Repetitive defect ruler........................................................................................	573
Image defect examples.......................................................................................................	574
Cleaning the scanner glass................................................................................................	579
Calibrating the MFP............................................................................................................	579
Media transport problems....................................................................................................................	581
E-mail problems...................................................................................................................................	583
To validate the SMTP gateway address.............................................................................	583
To validate the LDAP gateway address.............................................................................	583
Fax problems.......................................................................................................................................	584
Network connectivity problems............................................................................................................	584
Troubleshooting network printing problems........................................................................	584
Loopback test......................................................................................................................	585
Ping test..............................................................................................................................	585
Functional checks................................................................................................................................	586
Engine test..........................................................................................................................	586
Formatter test......................................................................................................................	586
MFP resets..........................................................................................................................................	587
Cold reset............................................................................................................................	587
NVRAM initialization...........................................................................................................	587
Hard-disk initialization.........................................................................................................	588

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Control panel troubleshooting.............................................................................................................	589
Control panel layout............................................................................................................	589
Control panel features........................................................................................................	590
Home-screen navigation.....................................................................................................	591
Help system........................................................................................................................	591
What is This? Help.............................................................................................	591
Show Me How Help............................................................................................	592
Menu map...........................................................................................................................	592
Retrieve job menu...............................................................................................................	592
Information menu................................................................................................................	593
Fax menu............................................................................................................................	594
Paper handling menu..........................................................................................................	594
Configure device menu.......................................................................................................	596
Originals submenu.............................................................................................	597
Copying submenu..............................................................................................	598
Enhancement submenu.....................................................................................	599
Sending submenu..............................................................................................	599
Printing submenu...............................................................................................	600
PCL submenu....................................................................................................	603
Print quality submenu.........................................................................................	604
System setup submenu......................................................................................	605
Copy/send settings.............................................................................................	609
MBM-3 Configuration submenu.........................................................................	610
Stapler/stacker submenu...................................................................................	611
I/O submenu.......................................................................................................	611
Embedded Jetdirect submenu...........................................................................	612
Resets submenu................................................................................................	615
Diagnostics menu...............................................................................................................	616
Tools for troubleshooting.....................................................................................................................	620
Using the embedded Web server.......................................................................................	620
Opening the embedded Web server..................................................................	620
Information tab...................................................................................................	621
Settings tab........................................................................................................	621
Digital Sending tab.............................................................................................	622
Networking tab...................................................................................................	622
Other links..........................................................................................................	622
Using HP Web Jetadmin software......................................................................................	624
Information pages...............................................................................................................	625
To print an information page..............................................................................	625
Menu map..........................................................................................................	625
Configuration pages...........................................................................................	626
Configuration page............................................................................	626
HP embedded Jetdirect page............................................................	628
Paper handling configuration page...................................................	628
Fax accessory page..........................................................................	629
Finding important information on the configuration pages................	631
Supplies status page..........................................................................................	633
Usage page........................................................................................................	635
PCL or PS font list..............................................................................................	637
Individual component diagnostics.......................................................................................	638

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LED diagnostics ................................................................................................	638
Engine diagnostics.............................................................................................	639
Diagnostics mode..............................................................................	639
Diagnostics that put the engine into the special diagnostics mode. .	639
Diagnostic tests.................................................................................	640
Paper path sensor test.......................................................................................	641
Manual sensor test.............................................................................................	642
Scanner tests.....................................................................................................	644
Component tests................................................................................................	644
Service menu......................................................................................................................	647
Service ID...........................................................................................................................	649
Converting the service ID to an actual date.......................................................	649
Troubleshooting the embedded HP Jetdirect print server..................................................	650
Firmware-stack trace..........................................................................................................	650
Diagrams for troubleshooting..............................................................................................................	651
DC controller connections...................................................................................................	651
Scanner controller PCB connections..................................................................................	654
Locations of major components..........................................................................................	655
Sensors and switches........................................................................................	657
Sensors and switches.......................................................................	657
Motors, fans, and solenoids...............................................................................	659
Motors and solenoids........................................................................	659
Fans...................................................................................................	662
PCBs..................................................................................................	663
Scanner and ADF components..........................................................................	664
ADF and scanner sensors.................................................................	664
ADF pickup assembly sensors..........................................................	665
ADF motors, fans, and solenoids......................................................	665
2 X 500-sheet feeder..........................................................................................	667
IPTU...................................................................................................................	668
General timing chart............................................................................................................	669
General circuit diagrams.....................................................................................................	670
8 Parts and diagrams
Introduction..........................................................................................................................................	686
Ordering parts and supplies................................................................................................................	687
Parts that wear....................................................................................................................	687
Parts....................................................................................................................................	687
Customer support...............................................................................................................	687
Supplies and accessories...................................................................................................	687
Assembly locations..............................................................................................................................	692
Major components..............................................................................................................	692
External covers and panels.................................................................................................................	696
Internal components............................................................................................................................	708
ADF components.................................................................................................................................	752
Scanner components...........................................................................................................................	774
2 X 500-sheet feeder components......................................................................................................	796
Optional devices..................................................................................................................................	816
Stapler/stacker....................................................................................................................	816
3-bin mailbox.......................................................................................................................	818

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Intermediate paper transfer unit (IPTU)	..............................................................................820
Alphabetical parts list...........................................................................................................................	826
Numerical parts list..............................................................................................................................	840
Index....................................................................................................................................................................	855

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List of tables

Table 1-1	Parts compatibility..........................................................................................................................	13
Table 1-2	Product dimensions........................................................................................................................	15
Table 1-3	Product dimensions........................................................................................................................	15
Table 1-4	Environmental specifications..........................................................................................................	15
Table 1-5	Power requirements.......................................................................................................................	16
Table 1-6	Power consumption (average, in watts).........................................................................................	16
Table 1-7	Sound power and pressure level (Product Name: X)....................................................................	17
Table 1-8	Supported types of media..............................................................................................................	22
Table 1-9	Tray 1 media sizes.........................................................................................................................	22
Table 1-10	Tray 2, 3, and 4 media sizes..........................................................................................................	23
Table 1-11	Automatic duplex printing (two-sided printing)...............................................................................	24
Table 1-12	Optional 3-bin mailbox or stacker part of the stapler/stacker supported sizes..............................	24
Table 1-13	Stapler part of the optional stapler/stacker supported sizes..........................................................	26
Table 1-14	Supported heavy paper types........................................................................................................	29
Table 1-15	Weight equivalence table...............................................................................................................	30
Table 3-1	HP Color LaserJet 4730mfp installation.........................................................................................	52
Table 3-2	Supported printer drivers................................................................................................................	78
Table 3-3	Gaining access to Windows printer drivers....................................................................................	80
Table 3-4	Gaining access to Macintosh printer drivers..................................................................................	81
Table 5-1	Basic operation sequence............................................................................................................	143
Table 5-2	Function of motors, fans, and environment sensor......................................................................	153
Table 5-3	Fuser temperatures......................................................................................................................	158
Table 5-4	Calibration timing and duration....................................................................................................	187
Table 5-5	Cleaning timing and duration.......................................................................................................	187
Table 5-6	Paper tray media size detection...................................................................................................	199
Table 5-7	Paper size detection switch settings............................................................................................	205
Table 6-1	Common fasteners used in this MFP...........................................................................................	242
Table 7-1	Troubleshooting flowchart............................................................................................................	475
Table 7-2	Error messages and associated jam locations............................................................................	525
Table 7-3	Causes for jams in Tray 1............................................................................................................	545
Table 7-4	Causes for jams in Tray 2............................................................................................................	546
Table 7-5	Causes for jams in Tray 3............................................................................................................	547
Table 7-6	Causes for jams in Tray 4............................................................................................................	548
Table 7-7	Causes for jams in the paper path...............................................................................................	548
Table 7-8	Causes for jams in the right upper cover.....................................................................................	549
Table 7-9	Causes for jams in the duplex path..............................................................................................	550
Table 7-10	Causes of jams in the ADF..........................................................................................................	550
Table 7-11	Causes for jams in the IPTU........................................................................................................	551
Table 7-12	Causes for jams in the stapler/stacker.........................................................................................	551
Table 7-13	Causes for jams in the 3-bin mailbox...........................................................................................	552

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Table 7-14	Image defects...............................................................................................................................	561
Table 7-15	Causes for light images................................................................................................................	562
Table 7-16	Causes for light color....................................................................................................................	563
Table 7-17	Causes for dark images...............................................................................................................	563
Table 7-18	Causes for dark colors.................................................................................................................	564
Table 7-19	Causes for a completely blank image..........................................................................................	564
Table 7-20	Causes for an all black or solid colored image............................................................................	565
Table 7-21	Causes for vertical lines of white dots..........................................................................................	565
Table 7-22	Causes for dirt on the back of the paper......................................................................................	566
Table 7-23	Causes for dirt on the front of the paper......................................................................................	566
Table 7-24	Causes for vertical lines...............................................................................................................	567
Table 7-25	Causes for white vertical lines......................................................................................................	567
Table 7-26	Causes for horizontal lines...........................................................................................................	568
Table 7-27	Causes for white horizontal lines.................................................................................................	568
Table 7-28	Causes for a missing color...........................................................................................................	568
Table 7-29	Causes for blank spots.................................................................................................................	569
Table 7-30	Causes for poor fusing.................................................................................................................	570
Table 7-31	Causes for distortion or blurring...................................................................................................	570
Table 7-32	Causes for smearing....................................................................................................................	571
Table 7-33	Causes for misplaced image........................................................................................................	572
Table 7-34	Defects that can occur during printing.........................................................................................	574
Table 7-35	Defects that can occur when using the ADF................................................................................	578
Table 7-36	Important information on the configuration pages.......................................................................	631
Table 7-37	Tray 2 paper size codes...............................................................................................................	641
Table 7-38	Manual sensor test letter designations........................................................................................	642
Table 7-39	Service menu...............................................................................................................................	647
Table 8-1	Technical support Web sites and related documentation............................................................	687
Table 8-2	Supplies and accessories............................................................................................................	687
Table 8-3	Major components........................................................................................................................	693
Table 8-4	External covers and panels..........................................................................................................	697
Table 8-5	Right lower cover assembly.........................................................................................................	699
Table 8-6	Multipurpose tray assembly.........................................................................................................	701
Table 8-7	Right upper door assembly..........................................................................................................	703
Table 8-8	Left cover assembly.....................................................................................................................	705
Table 8-9	Face-down tray assembly............................................................................................................	707
Table 8-10	Internal components (1 of 8)........................................................................................................	709
Table 8-11	Internal components (2 of 8)........................................................................................................	711
Table 8-12	Internal components (3 of 8)........................................................................................................	713
Table 8-13	Internal components (4 of 8)........................................................................................................	715
Table 8-14	Internal components (5 of 8)........................................................................................................	717
Table 8-15	Internal components (6 of 8)........................................................................................................	719
Table 8-16	Internal components (7 of 8)........................................................................................................	721
Table 8-17	Internal components (8 of 8)........................................................................................................	723
Table 8-18	Paper pickup drive assembly.......................................................................................................	725
Table 8-19	Pickup motor assembly................................................................................................................	727
Table 8-20	Disengaging drive assembly........................................................................................................	729
Table 8-21	Lifter drive assembly....................................................................................................................	731
Table 8-22	Cassette.......................................................................................................................................	733
Table 8-23	Multipurpose pickup assembly.....................................................................................................	735
Table 8-24	ETB assembly..............................................................................................................................	737

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Table 8-25	Delivery assembly........................................................................................................................	739
Table 8-26	Fuser drive assembly...................................................................................................................	741
Table 8-27	Duplexing unit (1 of 2)..................................................................................................................	743
Table 8-28	Duplexing unit (2 of 2)..................................................................................................................	745
Table 8-29	Duplex feed assembly..................................................................................................................	747
Table 8-30	Fuser assembly............................................................................................................................	749
Table 8-31	PCB assembly..............................................................................................................................	751
Table 8-32	ADF assembly..............................................................................................................................	753
Table 8-33	ADF internal components (1 of 3)................................................................................................	755
Table 8-34	ADF internal components (2 of 3)................................................................................................	757
Table 8-35	ADF internal components (3 of 3)................................................................................................	759
Table 8-36	ADF input tray..............................................................................................................................	761
Table 8-37	ADF separation pad.....................................................................................................................	763
Table 8-38	ADF separation pad case.............................................................................................................	765
Table 8-39	ADF pickup-roller assembly.........................................................................................................	767
Table 8-40	ADF pickup-roller cover................................................................................................................	769
Table 8-41	ADF mylar holder assembly.........................................................................................................	771
Table 8-42	ADF mylar replacement kit...........................................................................................................	773
Table 8-43	Scanner glass and cover..............................................................................................................	775
Table 8-44	Scanner base components..........................................................................................................	777
Table 8-45	Scanner flatbed unit assembly.....................................................................................................	779
Table 8-46	Scanner covers............................................................................................................................	781
Table 8-47	Scanner carriage lock assembly..................................................................................................	783
Table 8-48	Scanner-open sensor assembly...................................................................................................	785
Table 8-49	Scanner motor fan........................................................................................................................	787
Table 8-50	Scanner motor..............................................................................................................................	789
Table 8-51	Scanner belt and pulley assembly...............................................................................................	791
Table 8-52	Scanner slide rail..........................................................................................................................	793
Table 8-53	Scanner optical assembly............................................................................................................	795
Table 8-54	500-sheet feeder external components.......................................................................................	799
Table 8-55	2 X 500-sheet paper feeder internal components (1 of 2)...........................................................	801
Table 8-56	2 X 500-sheet paper feeder internal components (2 of 2)...........................................................	803
Table 8-57	500-sheet feeder lifter drive assembly.........................................................................................	805
Table 8-58	Upper paper pickup drive assembly.............................................................................................	807
Table 8-59	Lower paper pickup drive assembly.............................................................................................	809
Table 8-60	2 X 500-sheet paper feeder cassette...........................................................................................	811
Table 8-61	Upper paper pickup assembly......................................................................................................	813
Table 8-62	Lower paper pickup assembly......................................................................................................	815
Table 8-63	Stapler/stacker accessory............................................................................................................	817
Table 8-64	3-bin mailbox accessory...............................................................................................................	819
Table 8-65	External covers and panels..........................................................................................................	821
Table 8-66	Internal components (1 of 2)........................................................................................................	823
Table 8-67	Internal components (2 of 2)........................................................................................................	825
Table 8-68	Alphabetical parts list...................................................................................................................	826
Table 8-69	Numerical parts list.......................................................................................................................	840

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List of figures

Figure 4-1	ETB total page count according to average job length................................................................	114
Figure 4-2	Supply item locations...................................................................................................................	116
Figure 4-3	Supplies replacement clearance diagram....................................................................................	117
Figure 5-1	Basic system operation................................................................................................................	142
Figure 5-2	Power on sequence......................................................................................................................	145
Figure 5-3	Formatter system.........................................................................................................................	146
Figure 5-4	Engine control system..................................................................................................................	150
Figure 5-5	DC controller PCB........................................................................................................................	151
Figure 5-6	Motors and fans............................................................................................................................	153
Figure 5-7	Low-voltage power supply circuits...............................................................................................	157
Figure 5-8	Fuser power supply circuit...........................................................................................................	157
Figure 5-9	Low-voltage power supply circuit.................................................................................................	159
Figure 5-10	Heater temperature control circuit................................................................................................	161
Figure 5-11	High-voltage power supply block diagram...................................................................................	165
Figure 5-12	Video interface control..................................................................................................................	167
Figure 5-13	Laser/scanner assembly..............................................................................................................	169
Figure 5-14	Laser control circuit block diagram...............................................................................................	171
Figure 5-15	Scanner motor circuit diagram.....................................................................................................	172
Figure 5-16	Image formation system...............................................................................................................	173
Figure 5-17	Image formation process..............................................................................................................	175
Figure 5-18	Electrostatic latent image formation block...................................................................................	176
Figure 5-19	Pre-exposure................................................................................................................................	176
Figure 5-20	Laser beam exposure...................................................................................................................	177
Figure 5-21	Attaching the media to the ETB...................................................................................................	178
Figure 5-22	Toner transfer...............................................................................................................................	179
Figure 5-23	Separation....................................................................................................................................	179
Figure 5-24	Fusing...........................................................................................................................................	180
Figure 5-25	Print cartridge...............................................................................................................................	181
Figure 5-26	Memory tag...................................................................................................................................	182
Figure 5-27	Photosensitive drum detection.....................................................................................................	183
Figure 5-28	ETB...............................................................................................................................................	184
Figure 5-29	Transfer roller engagement/disengagement control....................................................................	186
Figure 5-30	ETB cleaning................................................................................................................................	188
Figure 5-31	Color misregistration detection.....................................................................................................	190
Figure 5-32	Image stabilization control............................................................................................................	191
Figure 5-33	Image density detection...............................................................................................................	193
Figure 5-34	Pickup/feed system (1 of 2)..........................................................................................................	195
Figure 5-35	Pickup/feed system (2 of 2)..........................................................................................................	197
Figure 5-36	Pickup/feed system......................................................................................................................	198
Figure 5-37	Cassette pickup............................................................................................................................	200

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Figure 5-38	Media lifting..................................................................................................................................	202
Figure 5-39	Media lifting..................................................................................................................................	203
Figure 5-40	Skew correction............................................................................................................................	204
Figure 5-41	Media detection............................................................................................................................	205
Figure 5-42	Loop control..................................................................................................................................	208
Figure 5-43	Fusing pressure release...............................................................................................................	209
Figure 5-44	Duplex feed unit...........................................................................................................................	210
Figure 5-45	Duplexing driver PCB signal flow.................................................................................................	210
Figure 5-46	Duplexing feed.............................................................................................................................	211
Figure 5-47	Paper skew correction..................................................................................................................	212
Figure 5-48	ADF mechanical structure............................................................................................................	215
Figure 5-49	Scanner assembly electrical structure.........................................................................................	216
Figure 5-50	Scan carriage components..........................................................................................................	217
Figure 5-51	Scan carriage movement.............................................................................................................	218
Figure 5-52	ADF paper path and sensors.......................................................................................................	219
Figure 5-53	2 X 500-sheet feeder paper path.................................................................................................	221
Figure 5-54	2 X 500-sheet feeder I/O block diagram......................................................................................	222
Figure 5-55	2 X 500-sheet feeder pickup and feed diagram...........................................................................	223
Figure 5-56	IPTU paper path...........................................................................................................................	225
Figure 5-57	IPTU PCB flow.............................................................................................................................	226
Figure 5-58	IPTU transfer operation................................................................................................................	227
Figure 5-59	3-bin mailbox operation................................................................................................................	229
Figure 5-60	Media flow when using the stacker mode....................................................................................	230
Figure 5-61	Stapler/stacker operation.............................................................................................................	232
Figure 5-62	Jogger operation (top view)..........................................................................................................	233
Figure 5-63	Stapler unit operation...................................................................................................................	235
Figure 6-1	Removal and replacement sequencing tree diagram..................................................................	240
Figure 6-2	Remove the print cartridges (1 of 3).............................................................................................	244
Figure 6-3	Remove the print cartridges (2 of 3).............................................................................................	245
Figure 6-4	Remove the print cartridges (3 of 3).............................................................................................	245
Figure 6-5	Remove the control panel overlays..............................................................................................	246
Figure 6-6	Remove the control panel (1 of 2)................................................................................................	246
Figure 6-7	Remove the control panel (2 of 2)................................................................................................	247
Figure 6-8	Remove the IPTU (1 of 3)............................................................................................................	247
Figure 6-9	Remove the IPTU (2 of 3)............................................................................................................	248
Figure 6-10	Remove the IPTU (3 of 3)............................................................................................................	248
Figure 6-11	Remove the stapler/stacker (1 of 5).............................................................................................	249
Figure 6-12	Remove the stapler/stacker (2 of 5).............................................................................................	249
Figure 6-13	Remove the stapler/stacker (3 of 5).............................................................................................	250
Figure 6-14	Remove the stapler/stacker (4 of 5).............................................................................................	250
Figure 6-15	Remove the stapler/stacker (5 of 5).............................................................................................	251
Figure 6-16	Replace the staple cartridge (1 of 3)............................................................................................	251
Figure 6-17	Replace the staple cartridge (2 of 3)............................................................................................	252
Figure 6-18	Replace the staple cartridge (3 of 3)............................................................................................	252
Figure 6-19	Remove the 3-bin mailbox (1 of 3)...............................................................................................	253
Figure 6-20	Remove the 3-bin mailbox (2 of 3)...............................................................................................	253
Figure 6-21	Remove the 3-bin mailbox (3 of 3)...............................................................................................	254
Figure 6-22	Remove the ETB assembly (1 of 4).............................................................................................	254
Figure 6-23	Remove the ETB assembly (2 of 4).............................................................................................	255
Figure 6-24	Remove the ETB assembly (3 of 4) — right lever.......................................................................	255

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Figure 6-25 Remove the ETB assembly (4 of 4) — left lever..........................................................................	256
Figure 6-26 Remove the MP tray pickup assembly (1 of 2)............................................................................	257
Figure 6-27 Remove the MP tray pickup assembly (2 of 2)............................................................................	257
Figure 6-28 Remove the ADF input tray (1 of 3).............................................................................................	258
Figure 6-29 Remove the ADF input tray (2 of 3).............................................................................................	258
Figure 6-30 Remove the ADF input tray (3 of 3).............................................................................................	259
Figure 6-31 Remove the ADF pickup and feed rollers (1 of 3)........................................................................	260
Figure 6-32 Remove the ADF pickup and feed rollers (2 of 3)........................................................................	260
Figure 6-33 Remove the ADF pickup and feed rollers (3 of 3)........................................................................	261
Figure 6-34 Remove the ADF separation pad (1 of 4)....................................................................................	262
Figure 6-35 Remove the ADF separation pad (2 of 4)....................................................................................	262
Figure 6-36 Remove the ADF separation pad (3 of 4)....................................................................................	263
Figure 6-37 Remove the ADF separation pad (4 of 4)....................................................................................	263
Figure 6-38 Remove the ADF delivery guide (1 of 3)......................................................................................	264
Figure 6-39 Remove the ADF delivery guide (2 of 3)......................................................................................	264
Figure 6-40 Remove the ADF delivery guide (3 of 3)......................................................................................	265
Figure 6-41 Reinstall the clear mylar sheet.....................................................................................................	265
Figure 6-42 Remove the face-down tray assembly.........................................................................................	266
Figure 6-43 Remove the fuser (1 of 2)............................................................................................................	267
Figure 6-44 Remove the fuser (2 of 2)............................................................................................................	267
Figure 6-45 Remove the tray 2, 3, or 4 pickup and feed rollers (1 of 2)..........................................................	268
Figure 6-46 Remove the tray 2, 3, or 4 pickup and feed rollers (2 of 2)..........................................................	268
Figure 6-47 Remove the MP tray pickup roller (1 of 3)...................................................................................	269
Figure 6-48 Remove the MP tray pickup roller (2 of 3)...................................................................................	269
Figure 6-49 Remove the MP tray pickup roller (3 of 3)...................................................................................	270
Figure 6-50 Replace the MP tray pickup roller................................................................................................	270
Figure 6-51 Replace the tray cover.................................................................................................................	271
Figure 6-52 Remove the tray 2 separation roller (1 of 3)................................................................................	271
Figure 6-53 Remove the tray 2 separation roller (2 of 3)................................................................................	272
Figure 6-54 Remove the tray 2 separation roller (3 of 3)................................................................................	272
Figure 6-55 Remove the tray 3 or 4 separation rollers (1 of 2).......................................................................	273
Figure 6-56 Remove the tray 3 or 4 separation rollers (2 of 2).......................................................................	273
Figure 6-57 Remove the scanner filter (1 of 2)................................................................................................	274
Figure 6-58 Remove the scanner filter (2 of 2)................................................................................................	274
Figure 6-59 Remove the ADF hinge flap.........................................................................................................	275
Figure 6-60 Remove the formatter (1 of 2)......................................................................................................	276
Figure 6-61 Remove the formatter (2 of 2)......................................................................................................	276
Figure 6-62 Remove the hard drive (1 of 2)....................................................................................................	277
Figure 6-63 Remove the hard drive (2 of 2)....................................................................................................	277
Figure 6-64 Remove the DIMM (1 of 3)...........................................................................................................	278
Figure 6-65 Remove the DIMM (2 of 3)...........................................................................................................	278
Figure 6-66 Remove the DIMM (3 of 3)...........................................................................................................	279
Figure 6-67 Remove the DIMM (4 of 5)...........................................................................................................	279
Figure 6-68 Remove the flash memory card (1 of 2).......................................................................................	281
Figure 6-69 Remove the flash memory card (2 of 2).......................................................................................	281
Figure 6-70 Remove the fax accessory (1 of 5)..............................................................................................	282
Figure 6-71 Remove the fax accessory (2 of 5)..............................................................................................	282
Figure 6-72 Remove the fax accessory (3 of 5)..............................................................................................	283
Figure 6-73 Remove the fax accessory (4 of 5)..............................................................................................	283
Figure 6-74 Remove the fax accessory (5 of 5)..............................................................................................	284

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xxvii

Figure 6-75	Cover, door, and panel locations (1 of 2).....................................................................................	285
Figure 6-76	Cover, door, and panel locations (2 of 2).....................................................................................	286
Figure 6-77	Remove the face-down tray assembly.........................................................................................	287
Figure 6-78	Remove the delivery cover assembly..........................................................................................	287
Figure 6-79	Remove the rear cover assembly (1 of 4)....................................................................................	288
Figure 6-80	Remove the rear cover assembly (2 of 4)....................................................................................	288
Figure 6-81	Remove the rear cover assembly (3 of 4)....................................................................................	289
Figure 6-82	Remove the rear cover assembly (4 of 4)....................................................................................	289
Figure 6-83	Remove the left cover..................................................................................................................	290
Figure 6-84	Remove the front cover (1 of 5)...................................................................................................	291
Figure 6-85	Remove the front cover (2 of 5)...................................................................................................	292
Figure 6-86	Remove the front cover (3 of 5)...................................................................................................	292
Figure 6-87	Remove the front cover (4 of 5)...................................................................................................	293
Figure 6-88	Remove the front cover (5 of 5)...................................................................................................	293
Figure 6-89	Remove tray 1 (1 of 7)..................................................................................................................	294
Figure 6-90	Remove tray 1 (2 of 7)..................................................................................................................	294
Figure 6-91	Remove tray 1 (3 of 7)..................................................................................................................	295
Figure 6-92	Remove tray 1 (4 of 7)..................................................................................................................	295
Figure 6-93	Remove tray 1 (5 of 7)..................................................................................................................	296
Figure 6-94	Remove tray 1 (6 of 7)..................................................................................................................	296
Figure 6-95	Remove tray 1 (7 of 7)..................................................................................................................	297
Figure 6-96	Remove the right lower cover assembly (1 of 5)..........................................................................	297
Figure 6-97	Remove the right lower cover assembly (2 of 5)..........................................................................	298
Figure 6-98	Remove the right lower cover assembly (3 of 5)..........................................................................	298
Figure 6-99	Remove the right lower cover assembly (4 of 5)..........................................................................	299
Figure 6-100	Remove the right lower cover assembly (5 of 5)..........................................................................	299
Figure 6-101	Remove the delivery upper cover assembly................................................................................	300
Figure 6-102	Remove the right front lower inner cover.....................................................................................	301
Figure 6-103	Remove the left rear inner cover..................................................................................................	302
Figure 6-104	Remove the right front inner cover assembly (1 of 3)..................................................................	303
Figure 6-105	Remove the right front inner cover assembly (2 of 3)..................................................................	303
Figure 6-106	Remove the right front inner cover assembly (3 of 3)..................................................................	304
Figure 6-107	Remove the right rear inner cover assembly (1 of 4)...................................................................	304
Figure 6-108	Remove the right rear inner cover assembly (2 of 4)...................................................................	305
Figure 6-109	Remove the right rear inner cover assembly (3 of 4)...................................................................	305
Figure 6-110	Remove the right rear inner cover assembly (4 of 4)...................................................................	306
Figure 6-111	Locations of main assemblies (1 of 3).........................................................................................	307
Figure 6-112	Locations of main assemblies (2 of 3).........................................................................................	308
Figure 6-113	Locations of main assemblies (3 of 3).........................................................................................	309
Figure 6-114	Paper feed assembly sensor........................................................................................................	310
Figure 6-115	Remove the paper feed assembly (1 of 6)...................................................................................	311
Figure 6-116	Remove the paper feed assembly (2 of 6)...................................................................................	311
Figure 6-117	Remove the paper feed assembly (3 of 6)...................................................................................	312
Figure 6-118	Remove the paper feed assembly (4 of 6)...................................................................................	312
Figure 6-119	Remove the paper feed assembly (5 of 6)...................................................................................	313
Figure 6-120	Remove the paper feed assembly (6 of 6)...................................................................................	313
Figure 6-121	Remove the pickup drive assembly (1 of 2).................................................................................	314
Figure 6-122	Remove the pickup drive assembly (2 of 2).................................................................................	314
Figure 6-123	Remove the lifter drive assembly (1 of 3)....................................................................................	315
Figure 6-124	Remove the lifter drive assembly (2 of 3)....................................................................................	315

xxviii

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