How it Works
HP
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4610n
Service Manual
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HP 4650, 4610n, 4600 Service Manual

hp color LaserJet
4600/4610n/4650
service
HP Color LaserJet 4600 Series printer
Service Manual
Copyright
© 2005 Copyright Hewlett-Packard Development Company, L.P.
The information 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 held liable for technical or editorial errors or omissions contained herein.
Part number: Q3668-90970
Edition 1, 02/2005
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, Windows®, and Windows NT
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are U.S. registered trademarks of Microsoft Corporation.
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PANTONE
is Pantone, Inc's check-
standard trademark for color.
®
UNIX
is a registered trademark of the
Open Group.
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Safety Information
WARNING!
Potential Shock Hazard
Always follow basic safety precautions when using this product to reduce the risk of injury from fire or electric shock.
Table of contents
1 Product information
Model configurations...............................................................................................................................2
HP Color LaserJet 4600 Series printer...................................................................................2
Printer features........................................................................................................................................5
Printer features.......................................................................................................................5
Printer assemblies...................................................................................................................................9
HP Color LaserJet 4600 models.............................................................................................9
HP Color LaserJet 4610n printer..........................................................................................10
HP Color LaserJet 4650 models...........................................................................................11
Identification, site requirements, and specifications..............................................................................13
Model and serial numbers....................................................................................................13
Power and regulatory label...................................................................................................14
Site requirements..................................................................................................................14
Space requirements.............................................................................................16
Physical specifications.........................................................................................17
Electrical specifications.........................................................................................................17
Environmental specifications................................................................................................18
Acoustic emissions...............................................................................................................18
Supply storage requirements ...............................................................................................19
Print media.............................................................................................................................................20
Print-media specifications.....................................................................................................20
Media to avoid.......................................................................................................................22
Media that can cause damage to the printer........................................................................22
Printing on special media......................................................................................................23
Transparencies....................................................................................................23
Glossy paper........................................................................................................24
Colored paper.......................................................................................................24
Printing images....................................................................................................24
Envelopes.............................................................................................................24
Labels...................................................................................................................25
Heavy paper.........................................................................................................25
HP LaserJet Tough paper....................................................................................26
Preprinted forms and letterhead..........................................................................26
Recycled paper....................................................................................................27
Weight equivalence table.....................................................................................28
Environmental product stewardship program........................................................................................29
Protecting the environment...................................................................................................29
Ozone production..................................................................................................................29
Power consumption..............................................................................................................29
Paper use..............................................................................................................................29
ENWW iii
Hewlett-Packard limited warranty statement.........................................................................................31
Declaration of conformity.......................................................................................................................32
Country/region laser safety statements.................................................................................................34
Japan power-cord statement.................................................................................................................35
2 Service approach
Service approach...................................................................................................................................38
Parts and supplies.................................................................................................................................39
HP customer care..................................................................................................................................41
Ordering related documentation and software .....................................................................................42
Plastics..................................................................................................................................29
HP LaserJet printing supplies...............................................................................................29
HP Printing Supplies Returns and Recycling Program Information.....................................29
Recycled paper.....................................................................................................................30
Material restrictions...............................................................................................................30
For more information.............................................................................................................30
Canadian DOC regulations...................................................................................................34
EMI statement (Korea)..........................................................................................................34
VCCI statement (Japan).......................................................................................................34
Laser Statement for Finland.................................................................................................35
Ordering parts, supplies, and accessories over the Internet................................................39
Ordering directly through the embedded Web server (for printers with network
connections)..........................................................................................................................39
Ordering directly through the HP Toolbox software (HP CLJ 4650 only).............................39
Exchange program................................................................................................................40
Supplies................................................................................................................................40
World Wide Web...................................................................................................................40
HP Service Parts Information...............................................................................................40
Online services.....................................................................................................................41
Telephone support................................................................................................................41
Software utilities, drivers, and electronic information...........................................................41
HP service information..........................................................................................................41
HP service agreements........................................................................................................41
HP support and information for Macintosh computers.........................................................42
3 Installation and configuration
Unpacking the printer............................................................................................................................44
Installing the media tray.........................................................................................................................49
Connecting power..................................................................................................................................50
Installing the print cartridges..................................................................................................................50
Installing a new overlay (HP Color LaserJet 4600 models)..................................................................53
Installing a new control-panel label (HP Color LaserJet 4650 models)................................................54
Testing the printer operation..................................................................................................................55
Using PowerSave .................................................................................................................................56
To set PowerSave Time.......................................................................................................56
To turn PowerSave on or off.................................................................................................56
Connecting to a computer.....................................................................................................................57
Parallel connections..............................................................................................................57
USB configuration (HP Color LaserJet 4610n and 4650 models)........................................58
Auxiliary connection configuration (HP Color LaserJet 4650 models).................................58
iv ENWW
Network connections.............................................................................................................59
Direct to network (HP Color LaserJet 4600 and 4650 models)...........................59
Network print server (HP Color LaserJet 4600 and 4650 models)......................59
Network print server (HP Color LaserJet 4610n printer).....................................61
Peer-to-peer (direct to network, HP Color LaserJet 4600 and 4650 models).....62
Peer-to-peer (parallel)..........................................................................................62
Enhanced I/O (EIO) configuration.........................................................................................62
HP Jetdirect print servers.....................................................................................63
Available enhanced I/O interfaces.......................................................................63
NetWare networks................................................................................................63
Windows and Windows NT networks...................................................................64
AppleTalk networks..............................................................................................64
LocalTalk configuration........................................................................................64
LocalTalk network configuration..........................................................................64
UNIX and Linux networks.....................................................................................64
Wireless printing...................................................................................................................64
IEEE 802.11b standard........................................................................................64
Bluetooth..............................................................................................................65
Printer drivers........................................................................................................................................66
Available drivers....................................................................................................................67
Additional drivers..................................................................................................................68
Select the right printer driver for your needs........................................................................68
Printer driver Help.................................................................................................................68
Software for Macintosh computers........................................................................................................69
PPDs.....................................................................................................................................69
HP LaserJet Utility................................................................................................................69
Installing the printing system software..................................................................................................70
Installing Windows printing system software for direct connections....................................70
Installing Windows printing system software for networks...................................................71
To set up Windows-sharing to use the printer on a network ...............................................72
Installing Macintosh printing system software for networks.................................................72
Installing Macintosh printing system software for direct connections (USB, HP Color
LaserJet 4610n and 4650 models only)...............................................................................74
Installing the software after the parallel or USB cable has been connected........................75
Network configuration............................................................................................................................77
Configuring the printer for the network.................................................................................77
Configuring Novell NetWare frame type parameters............................................................77
Software for networks............................................................................................................................78
HP Web Jetadmin..................................................................................................................................78
UNIX......................................................................................................................................................79
Utilities...................................................................................................................................................79
Embedded Web server (HP Color LaserJet 4600 and 4650 models only)...........................................80
Features................................................................................................................................80
HP Toolbox (HP Color LaserJet 4650 models only).............................................................80
Other components and utilities.............................................................................................81
Setting network security on the printer..................................................................................................82
Locking the control panel......................................................................................................82
Levels of security ...............................................................................................82
Using an ASCII PJL escape sequence to set network security .........................83
ENWW v
4 Maintenance
Cleaning the printer and accessories ..................................................................................................86
Approximate replacement intervals for supply items.............................................................................87
Locating supplies...................................................................................................................................91
Replacing supply items..........................................................................................................................92
Printer memory (HP Color LaserJet 4600 models).............................................................................100
Printer memory (HP Color LaserJet 4610n and 4650 models)...........................................................104
Installing an HP Jetdirect print server card (HP Color LaserJet 4600 and 4650 models only)...........114
Installing an HP Jetdirect print server card (HP Color LaserJet 4610n model)..................................116
Cleaning spilled toner...........................................................................................................86
Vacuum specifications.........................................................................................86
ETB life under different circumstances ................................................................................89
Changing print cartridges .....................................................................................................92
Replacing the transfer unit ...................................................................................................94
Replacing the transfer unit when it is not at end of life........................................96
Replacing the fuser ..............................................................................................................97
Replacing the fuser when it is not at end of life ..................................................99
Installing memory and font DIMMs (HP Color LaserJet 4600 models) .............................100
Enabling memory (HP Color LaserJet 4600 models)........................................102
Enabling the language font DIMM (HP Color LaserJet 4600 models)...............103
Checking DIMM installation (HP Color LaserJet 4600 models)........................103
Installing memory (HP Color LaserJet 4610n and 4650 models) and fonts (HP Color
LaserJet 4650 models).......................................................................................................105
To install DDR memory DIMMs (HP Color LaserJet 4610n and 4650
models)...............................................................................................................105
To install a flash memory card (HP Color LaserJet 4610n and 4650
models)...............................................................................................................109
Enabling memory (HP Color LaserJet 4610n and 4650 models)......................113
To enable memory for Windows 98, ME, and NT (HP Color
LaserJet 4650 models)......................................................................113
To enable memory for Windows 2000 and XP (HP Color
LaserJet 4610n and 4650 models)....................................................113
5 Theory of operation
Basic operation....................................................................................................................................118
Operation sequence............................................................................................................119
Engine-control system.........................................................................................................................120
DC controller circuit.............................................................................................................121
Motors, fans, and environment sensor...............................................................................122
Fuser power-supply circuit..................................................................................................124
Heater temperature control.................................................................................................126
High-voltage power supply.................................................................................................127
Low-voltage power supply..................................................................................................128
Formatter system................................................................................................................129
PowerSave..........................................................................................................................130
Input/output.........................................................................................................................131
Parallel interface................................................................................................131
Expanded I/O (HP Color LaserJet 4600 models)..............................................131
USB 1.1 connector (HP Color LaserJet 4610n and 4650 models)....................131
Flash (HP Color LaserJet 4600 models)............................................................131
vi ENWW
Hard-disk accessory (HP Color LaserJet 4600 and 4650 models)...................131
CPU....................................................................................................................131
Printer memory...................................................................................................................132
Read-only memory.............................................................................................132
Random-access memory...................................................................................132
DIMM slots (HP Color LaserJet 4600 Series printer).........................................................132
Firmware DIMM (HP Color LaserJet 4600 models) ..........................................132
Flash memory (HP Color LaserJet 4610n and 4650 models)...........................132
Nonvolatile memory...........................................................................................132
PJL overview.......................................................................................................................133
PML.....................................................................................................................................133
Control panel.......................................................................................................................133
Laser/scanner assembly......................................................................................................................134
Scanner-motor control........................................................................................................135
Image-formation system......................................................................................................................136
Image-formation process....................................................................................................137
Print cartridges....................................................................................................................138
Memory tag........................................................................................................139
Toner-level detection..........................................................................................................139
Developer rotations............................................................................................140
Toner sensor......................................................................................................140
Photosensitive drum rotations............................................................................140
Developing cylinder disengaging control...........................................................141
Electrostatic transfer/transport belt (ETB) unit....................................................................142
Electrostatic-latent-image-formation block.........................................................................143
Step 1: Primary exposure...................................................................................143
Step 2: Primary charging....................................................................................144
Step 3: Laser beam exposure............................................................................144
Development block.............................................................................................................145
Step 4: Toner charging.......................................................................................145
Step 5: Development..........................................................................................145
Transfer block.....................................................................................................................146
Step 6: Attaching................................................................................................146
Step 7: Transfer.................................................................................................146
Step 8: Separation.............................................................................................148
Fusing block........................................................................................................................148
Step 9: Fusing....................................................................................................148
Cleaning block....................................................................................................................149
Step 10: ETB cleaning.......................................................................................149
Step 11: Photosensitive drum cleaning.............................................................149
Calibration and cleaning.....................................................................................................150
ETB cleaning......................................................................................................152
Photosensitive drum cleaning............................................................................153
Color-plane registration calibration.....................................................................................154
Drum phase calibration.......................................................................................................155
Image stabilization control..................................................................................................155
Environmental change control (HP Color LaserJet 4610n and 4650 models). .156
Image density calibration control (DMAX).........................................................156
Image halftone calibration control (DHALF).......................................................157
Image density detection.....................................................................................158
ENWW vii
Pickup/feed system.............................................................................................................................159
Pickup/feed unit..................................................................................................................161
Fuser/delivery unit...............................................................................................................166
Duplex feed unit..................................................................................................................167
500-sheet paper feeder.......................................................................................................................168
Pickup and feed operations................................................................................................169
2 x 500-sheet feeder............................................................................................................................170
Pickup and feed system......................................................................................................171
6 Removal and replacement
Introduction..........................................................................................................................................174
Repair notices.....................................................................................................................174
Caution regarding electrostatic discharge (ESD)...............................................................174
Required tools.....................................................................................................................174
Types of fasteners..............................................................................................................175
Supplies...............................................................................................................................................176
Print cartridges and ETB.....................................................................................................177
Covers and external components........................................................................................................178
Rear cover..........................................................................................................................178
Top cover............................................................................................................................179
Rear top cover....................................................................................................................181
Left cover............................................................................................................................183
Right cover..........................................................................................................................184
Multipurpose tray (tray 1)....................................................................................................185
Front cover..........................................................................................................................186
Control panel.......................................................................................................................187
Installing a new overlay (HP Color LaserJet 4600 models)...............................................189
Installing a new control-panel label (HP Color LaserJet 4650 models).............................190
Internal components............................................................................................................................191
DC controller shield.............................................................................................................191
Internal components (front).................................................................................................192
Internal components (left side)...........................................................................................202
Cassette detection and cassette paper-size detection......................................162
Overhead transparency detection......................................................................163
Small-size paper detection.................................................................................164
Feed-speed control............................................................................................165
Cassette detection and cassette paper-size detection......................................172
Paper pickup unit...............................................................................................192
Paper pickup sensor PCA..................................................................................194
Cassette (tray 2) paper pickup rollers ...............................................................195
Paper pickup drive unit.......................................................................................196
Multipurpose tray pickup roller and separation pad...........................................197
Solenoids............................................................................................................199
Color registration detection unit.........................................................................200
Environment sensor (HP Color LaserJet 4610n/4650 models only).................202
Drum drive units.................................................................................................203
Memory-tag antenna PCAs................................................................................209
Developing disengaging motor assembly..........................................................210
DC controller PCA..............................................................................................211
Memory controller PCA......................................................................................212
viii ENWW
Cassette paper-size-detection switch................................................................213
Internal components (rear).................................................................................................214
Formatter............................................................................................................214
Low-voltage power supply.................................................................................215
Power-supply fan (HP Color LaserJet 4610n and 4650 models)......................217
Formatter case...................................................................................................218
Laser/scanner components................................................................................220
Remove the laser/scanner cover plate..............................................220
Remove the laser/scanner retaining bars.........................................222
To remove the laser/scanner assemblies.........................................224
Internal components (right side).........................................................................................225
High-voltage power supply PCA........................................................................225
Toner level detection PCA.................................................................................227
High-voltage contact blocks...............................................................................228
Door switch.........................................................................................................229
Internal components (top)...................................................................................................230
Fuser power supply PCA...................................................................................230
Fuser drive unit..................................................................................................232
Fuser inlet paper sensor....................................................................................234
Fuser delivery sensor.........................................................................................235
Output-bin-full sensor.........................................................................................236
Cartridge fan.......................................................................................................237
Formatter fan......................................................................................................238
Optional 500-sheet paper feeder (HP Color LaserJet 4600 and 4650 models only)..........................239
500-sheet paper feeder top cover plate..............................................................................239
500-sheet paper feeder drive unit.......................................................................................240
500-sheet paper-feeder pickup rollers................................................................................242
500-sheet paper-feeder PCA..............................................................................................242
Optional 2 x 500-sheet paper feeder (tray 3/tray 4) (HP Color LaserJet 4650 only)..........................243
2 x 500-sheet paper feeder front cover..............................................................................243
2 x 500-sheet paper feeder rear cover...............................................................................244
2 x 500-sheet paper feeder left cover.................................................................................245
2 x 500-sheet paper feeder right cover...............................................................................246
2 x 500-sheet paper feeder upper-cassette pickup assembly............................................247
2 x 500-sheet paper-feeder drive assembly.......................................................................248
2 x 500-sheet paper-feeder feed sensor............................................................................249
2 x 500-sheet paper feeder upper- or lower-cassette paper sensor..................................250
2 x 500-sheet paper feeder upper- or lower-cassette paper-detection switch...................252
2 x 500-sheet paper-feeder driver PCA..............................................................................253
2 x 500-sheet paper feeder pickup rollers..........................................................................254
7 Troubleshooting
Introduction..........................................................................................................................................256
Troubleshooting process.....................................................................................................................258
Pre-troubleshooting checklist..............................................................................................259
Troubleshooting basics ......................................................................................................261
Troubleshooting power-on .................................................................................................262
Printer-error troubleshooting ...............................................................................................................263
Status messages ...............................................................................................................263
Warning messages ............................................................................................................263
ENWW ix
Error messages ..................................................................................................................263
Critical error messages ......................................................................................................263
Alphabetical printer messages (HP Color LaserJet 4600 models).....................................264
Alphabetical printer messages (HP Color LaserJet 4610n and 4650 models)..................279
Numerical printer messages (HP Color LaserJet 4600 models)........................................298
Numerical printer messages (HP Color LaserJet 4610n and 4650 models)......................311
Replacement-parts configuration (HP Color LaserJet 4610n and 4650 models) ..............................329
Formatter and DC controller ..............................................................................................329
Formatter (new or previously installed in another printer) .................................................329
DC Controller (new or previously installed in another printer) ...........................................330
Paper-path troubleshooting ................................................................................................................331
Jams ...................................................................................................................................331
Jam locations......................................................................................................................331
Jam locations by error message ........................................................................................332
Jam recovery .....................................................................................................................333
To disable paper jam recovery...........................................................................334
Avoiding jams .....................................................................................................................334
Persistent jams ..................................................................................................................335
Basic troubleshooting for jams...........................................................................335
Data collection....................................................................................................335
General paper-path troubleshooting..................................................................336
Paper-path checklist...........................................................................................336
Jams in tray 1 ....................................................................................................337
Jams in tray 2 ....................................................................................................337
Jams in tray 3 or tray 3/tray 4 (2 x 500-sheet paper feeder, HP CLJ 4650
only) ...................................................................................................................338
Jams in the paper path ......................................................................................339
Jams in the top cover ........................................................................................340
Jams in the duplex path (HP CLJ 4600 and 4650 models only) ......................340
Media-transport troubleshooting .........................................................................................................341
Multiple pages are fed .......................................................................................................341
Media is wrinkled or folded.................................................................................................341
Paper is skewed .................................................................................................................342
Image-formation troubleshooting ........................................................................................................343
Online print-quality troubleshooting tools (HP Color LaserJet 4610n and 4650 models). .343
Print-quality problems associated with media....................................................................343
Overhead transparency defects .........................................................................................344
Print-quality problems that are associated with the environment.......................................344
Print-quality problems that are associated with jams.........................................................345
Print-quality troubleshooting pages ...................................................................................345
Understanding color variations ..........................................................................................345
Common causes of color variation.....................................................................345
Color selection process .....................................................................................................346
Matching colors ..................................................................................................................346
PANTONE®* color matching.............................................................................346
Swatch book color matching..............................................................................346
Using color..........................................................................................................................347
HP ImageREt 2400 (HP Color LaserJet 4600 models).....................................347
HP ImageREt 3600 (HP Color LaserJet 4610n and 4650 models)...................347
Paper selection..................................................................................................347
x ENWW
sRGB..................................................................................................................347
Color options ......................................................................................................................348
Print in Grayscale ..............................................................................................348
Automatic or manual color adjustment..............................................................348
Manual color options..........................................................................................348
Halftone options.................................................................................................349
Neutral Grays.....................................................................................................349
Edge Control......................................................................................................349
RGB Color..........................................................................................................349
Adjusting color balance ......................................................................................................350
To adjust color density.......................................................................................350
Image defects troubleshooting ...........................................................................................................351
Light image ........................................................................................................................352
Light color ..........................................................................................................................352
Dark image .........................................................................................................................353
Dark color ...........................................................................................................................353
Completely blank image ....................................................................................................353
All black or solid color ........................................................................................................353
Dots in vertical lines ...........................................................................................................354
Dirt on the back of the paper .............................................................................................354
Dirt on the front of the paper ..............................................................................................355
Vertical lines .......................................................................................................................355
White vertical lines .............................................................................................................355
Horizontal lines ..................................................................................................................356
White horizontal lines .........................................................................................................356
Missing color ......................................................................................................................356
Blank spots ........................................................................................................................357
Poor fusing .........................................................................................................................357
Distortion or blurring ...........................................................................................................358
Smearing ............................................................................................................................358
Misplaced image ................................................................................................................358
Repetitive defects troubleshooting.....................................................................................359
Interface troubleshooting ....................................................................................................................363
Communications checks.....................................................................................................363
EIO troubleshooting (HP CLJ 4600 and 4650 models only) .............................................363
AUTOEXEC.BAT standard configurations.........................................................................364
Parallel MS-DOS commands.............................................................................364
Printer Job Language (PJL) commands ............................................................................364
@PJL [Enter]......................................................................................................364
UEL ...................................................................................................................364
@PJL COMMENT..............................................................................................364
@PJL INFO CONFIG.........................................................................................365
@PJL INFO ID...................................................................................................365
@PJL INFO USTATUS......................................................................................365
@PJL INFO PAGECOUNT................................................................................365
@PJL JOB.........................................................................................................365
@PJL EOJ.........................................................................................................365
@PJL ECHO......................................................................................................365
@PJL USTATUS JOB=ON/OFF........................................................................365
@PJL USTATUSOFF........................................................................................366
ENWW xi
Control-panel troubleshooting.............................................................................................................367
Printing a menu map ..........................................................................................................367
Information menu ...............................................................................................................369
Paper handling menu .........................................................................................................370
Configure device menu ......................................................................................................371
Printing menu ....................................................................................................371
Print quality menu .............................................................................................374
System setup menu ..........................................................................................376
I/O menu ............................................................................................................380
Resets menu .....................................................................................................381
Diagnostics menu ..............................................................................................................382
Service menu .....................................................................................................................383
Tools for troubleshooting.....................................................................................................................385
Embedded Web server (HP Color LaserJet 4600 and 4650 models only) .......................385
To open the embedded Web server...................................................................................385
Information tab...................................................................................................386
Settings tab........................................................................................................386
Networking tab ..................................................................................................387
Other links..........................................................................................................387
Printer Status and Alerts software .....................................................................................387
To specify which status messages appear........................................................388
To view status messages and information.........................................................388
Printer information pages....................................................................................................388
Menu map .........................................................................................................388
Configuration page ............................................................................................389
Supplies status page .........................................................................................392
Usage page .......................................................................................................394
Demo page.........................................................................................................395
File directory page .............................................................................................396
PCL font list page...............................................................................................396
PS font list page.................................................................................................398
RGB samples page (HP Color LaserJet 4610n and 4650 models)...................398
CMYK samples page (HP Color LaserJet 4610n and 4650 only).....................399
Diagnostics .........................................................................................................................................400
LED diagnostics .................................................................................................................400
Engine diagnostics .............................................................................................................401
Diagnostics mode...............................................................................................401
Diagnostics that put the engine into the special diagnostics mode...................401
Diagnostic tests..................................................................................................402
Individual diagnostic tests...................................................................................................403
Print the event log page ....................................................................................403
View the event log on the control-panel display ...............................................403
Print the PQ troubleshooting pages ..................................................................403
Disable cartridge check (special mode test)......................................................404
Paper path sensor test (HP Color LaserJet 4610n and 4650 models)..............404
Paper-path test ..................................................................................................405
Sensor Test (special mode test) .......................................................................405
Manual sensor test (special mode test; HP Color LaserJet 4610n and 4650
models)...............................................................................................................408
Component test (special mode test)..................................................................413
xii ENWW
Print/Stop test ....................................................................................................418
Information menu...............................................................................................418
Configure device menu/printing menu...............................................................419
Configure device menu/resets menu.................................................................419
Configure device menu/print quality menu........................................................419
Test pages ..........................................................................................................................................420
Engine test page ................................................................................................................420
Formatter test page.............................................................................................................420
Engine resets.......................................................................................................................................421
Cold reset ...........................................................................................................................421
To perform a cold reset......................................................................................421
NVRAM initialization ..........................................................................................................421
To initialize NVRAM...........................................................................................422
Resetting the calibration values for the DC controller........................................................422
To reset the calibration values for the DC controller.........................................422
Hard disk initialization ........................................................................................................422
To initialize the hard disk....................................................................................422
Calibration bypass .............................................................................................................422
To bypass calibration.........................................................................................423
Calibrate Now (HP Color LaserJet 4600 models)..............................................................423
Quick Calibrate Now (HP Color LaserJet 4610n and 4650 models)..................................423
Full Calibrate Now (HP Color LaserJet 4610n and 4650 models).....................................424
Service menu.......................................................................................................................................425
Using the Service menu......................................................................................................425
Clear event log...................................................................................................425
Total page count................................................................................................425
Transfer kit count...............................................................................................425
Fuser kit count....................................................................................................425
Serial number.....................................................................................................425
Service ID ..........................................................................................................426
Restoring the Service ID...................................................................426
Converting the Service ID to an actual date.....................................426
Cold reset paper.................................................................................................427
Diagrams.............................................................................................................................................428
Main parts...........................................................................................................................428
Switches .............................................................................................................................430
Sensors...............................................................................................................................432
Solenoids ...........................................................................................................................435
Motors and fans .................................................................................................................437
PCAs ..................................................................................................................................439
DC controller PCA ..............................................................................................................441
Connectors .........................................................................................................................443
General circuit diagram ......................................................................................................446
8 Parts and diagrams
Introduction..........................................................................................................................................452
Ordering parts and supplies................................................................................................................453
Parts that wear....................................................................................................................453
Parts....................................................................................................................................453
Customer support...............................................................................................................453
ENWW xiii
Supplies and accessories...................................................................................................453
Common fasteners..............................................................................................................459
Illustrations and parts lists...................................................................................................................460
Locations of major components..........................................................................................461
External covers and panels.................................................................................................................464
Internal components............................................................................................................................466
500-sheet paper feeder (HP CLJ 4600/4650 models only).................................................................492
2 x 500-sheet paper feeder (HP CLJ 4650 models only)....................................................................496
Alphabetical parts list...........................................................................................................................508
Numerical parts list..............................................................................................................................515
Index....................................................................................................................................................................523
xiv ENWW

1 Product information

This chapter contains information about the following topics:
●
Model configurations
Printer features
●
Printer assemblies
●
●
Identification, site requirements, and specifications
Print media
●
●
Environmental product stewardship program
Hewlett-Packard limited warranty statement
●
Declaration of conformity
●
●
Country/region laser safety statements
Japan power-cord statement
●
ENWW 1

Model configurations

This manual describes the HP Color LaserJet 4600 models, the HP Color LaserJet 4610n model, and the HP Color LaserJet 4650 models, which are referred to collectively as the HP Color LaserJet 4600 Series printers.

HP Color LaserJet 4600 Series printer

The following figures and table show the configuration for the various models of HP Color LaserJet 4600 Series printer. The HP Color LaserJet 4600 printer and the HP Color LaserJet 4650 printer each come in five models.
1
3
2
Figure 1-1 HP CLJ 4600 Series printers
1 HP Color LaserJet 4600, 4600n, 4600dn, 4650, 4650n, and 4650dn printer and the HP Color LaserJet 4610n printer
2 HP Color LaserJet 4600dtn, 4600hdn, and 4650dtn printer
3 HP Color LaserJet 4650hdn printer
Table 1-1 HP Color LaserJet 4600 model configurations
Base model: HP Color LaserJet 4600 printer (product number C9660A)
The HP CLJ 4600 printer is the base model, which includes 96 megabytes (MB) of synchronous dynamic random access memory (SDRAM) and one 500-sheet input tray.
Callout 1 in the HP Color LaserJet 4600 printer.
Figure 1-1 HP CLJ 4600 Series printers shows
2 Chapter 1 Product information ENWW
Table 1-1 HP Color LaserJet 4600 model configurations (continued)
HP Color LaserJet 4600n printer (product number C9692A) The HP CLJ 4600n printer includes all of the features of the
base model plus an HP Jetdirect 610n print server (network card).
Callout 1 in the HP Color LaserJet 4600n printer.
HP Color LaserJet 4600dn printer (product number C9661A) The HP CLJ 4600dn printer includes all of the features of the
base model plus an HP Jetdirect 610n print server (network card), automatic 2-sided printing (duplexing), an additional 500-sheet feeder, and 96 MB of SDRAM.
Callout 1 in the HP Color LaserJet 4600dn printer.
HP Color LaserJet 4600dtn printer (product number C9662A) The HP CLJ 4600dtn printer includes all of the features of the
HP Color LaserJet 4600hdn printer (product number C9663A)
base model plus an HP Jetdirect 610n print server (network card) and automatic 2-sided printing (duplexing), an additional 500-sheet feeder, and 160 MB of SDRAM.
Callout 2 in Figure 1-1 HP CLJ 4600 Series printers shows the HP Color LaserJet 4600dtn printer.
The HP CLJ 4600hdn printer includes all of the features of the base model with an HP Jetdirect 610n print server (network card) and automatic 2-sided printing (duplexing), an additional 500-sheet feeder, a hard disk, and 160 MB of SDRAM.
Callout 2 in the HP Color LaserJet 4600hdn printer.
Figure 1-1 HP CLJ 4600 Series printers shows
Figure 1-1 HP CLJ 4600 Series printers shows
Figure 1-1 HP CLJ 4600 Series printers shows
Table 1-2 HP Color LaserJet 4610n printer
HP Color LaserJet 4610n printer (product number Q7732A) The HP CLJ 4610n includes 128 MB of dual-data-rate
(DDR) SDRAM plus 32 MB of additional memory on the formatter board for a total of 160 MB of memory.
This model includes a 500-sheet input tray.
The printer also includes an HP Jetdirect 175x external print server that is connected to the USB port. It also has an IEEE­compliant parallel connection.
Callout 1 in the HP Color LaserJet 4610n printer.
Figure 1-1 HP CLJ 4600 Series printers shows
Table 1-3 HP Color LaserJet 4650 model configurations
Base model: HP Color LaserJet 4650 printer (product number Q3668A)
The HP CLJ 4650 printer is the base model, which includes 128 MB of DDR SDRAM, plus 32 MB of additional memory on the formatter board for a total of 160 MB of memory, and a 500-sheet input tray.
The printer provides three enhanced input/output (EIO) slots, wireless connectivity, an auxiliary port, a universal serial bus (USB) connection, and a standard bidirectional parallel cable interface (IEEE-1284-C compliant).
Callout 1 in the HP Color LaserJet 4650 printer.
Figure 1-1 HP CLJ 4600 Series printers shows
ENWW Model configurations 3
Table 1-3 HP Color LaserJet 4650 model configurations (continued)
HP Color LaserJet 4650n printer (product number Q3669A) The HP CLJ 4650n printer includes all of the features of the
base model plus an HP Jetdirect 620n print server (network card).
Callout 1 in the HP Color LaserJet 4650n printer.
HP Color LaserJet 4650dn printer (product number Q3670A) The HP CLJ 4650dn printer includes all of the features of the
base model plus an HP Jetdirect 620n print server (network card) and automatic 2-sided printing (duplexing).
Callout 1 in the HP Color LaserJet 4650dn printer.
HP Color LaserJet 4650dtn printer (product number Q3671A) The HP CLJ 4650dtn printer includes all of the features of
the base model plus an HP Jetdirect 620n print server (network card), automatic 2-sided printing (duplexing), an additional 500-sheet feeder.
This model has 256 MB of DDR SDRAM, plus 32 MB of additional memory on the formatter board for a total of 288 MB of memory.
Callout 2 in the HP Color LaserJet 4650dtn printer.
HP Color LaserJet 4650hdn printer (product number Q3672A) The HP CLJ 4650hdn printer includes all of the features of
the base model plus an HP Jetdirect 620n print server (network card), automatic 2-sided printing (duplexing), a 2 x 500-sheet feeder, and a hard drive.
This model has 256 MB of DDR SDRAM, plus 32 MB of additional memory on the formatter board for a total of 288 MB of memory.
Figure 1-1 HP CLJ 4600 Series printers shows
Figure 1-1 HP CLJ 4600 Series printers shows
Figure 1-1 HP CLJ 4600 Series printers shows
Callout 3 in the HP Color LaserJet 4650hdn printer.
Figure 1-1 HP CLJ 4600 Series printers shows
4 Chapter 1 Product information ENWW

Printer features

This printer combines the quality and reliability of HP printing with the following features. For more information about printer features, go to one of the following Web sites:
■ HP Color LaserJet 4600 models:
■ HP Color LaserJet 4610n printer:
■ HP Color LaserJet 4650 models:
www.hp.com/support/clj4600
www.hp.com/support/clj4610
www.hp.com/support/clj4650

Printer features

Table 1-4 Printer features
Feature Description
Performance ■ HP Color LaserJet 4600 models: 17 pages per minute (ppm) on
Memory For information about printer memory, see Table 1-1 HP Color
User interface ■ Graphical display on the control panel.
letter-sized paper, 16 ppm on A4-sized paper.
■ HP Color LaserJet 4610n and 4650 models: 22 ppm on letter-sized
and A4-sized paper.
■ All models print on transparencies and glossy paper.
LaserJet 4600 model configurations.
■ Enhanced Help with animated graphics.
■ Embedded Web server to gain access to support and to order
supplies (on network-connected HP CLJ 4600 and 4650 models only).
■ HP CLJ 4650 models: HP LaserJet Toolbox software to provide
printer status and alerts, configure printer settings, view documentation and troubleshooting information, and print internal printer information pages.
Supported printer personalities ■ HP PCL 6.
■ HP PCL 5c.
■
PostScript
■ Automatic language switching.
■ HP CLJ 4610n and 4650 models: Portable document format (PDF).
Storage features ■ Job storage (only for HP CLJ 4600 and 4650 models that contain
hard disks).
■ Fonts and forms.
■ Personal identification number (PIN) printing (for printers that contain
hard disks).
®
3 emulation (PS).
ENWW Printer features 5
Table 1-4 Printer features (continued)
Feature Description
Environmental features ■ PowerSave setting.
■ High content of recyclable components and materials.
■
ENERGY STAR
Fonts ■ 80 internal fonts are available for both PCL and PostScript emulation.
■ 80 printer-matching screen fonts in TrueType format are available
with the software solution.
■ HP Web Jetadmin supports forms and fonts on the disk.
®
compliant.
Paper handling ■ Prints on media from 77 mm x 127 mm (3 inches x 5 inches) up to
legal size (216 mm x 355 mm; 8.5 inches x 14 inches).
■ HP Color LaserJet 4600 models: Prints on media of weights from
■ HP Color LaserJet 4610n and 4650 models: Prints on media of
2
60 g/m
to 176 g/m2 (16 lb to 47 lb).
weights from 60 g/m
2
to 199 g/m2 (16 lb to 53 lb).
■ Prints on a wide range of media types including glossy, labels,
overhead transparencies, and envelopes.
■ Accepts multiple gloss levels.
■ Includes a 500-sheet input tray (tray 2) that supports letter-, legal-,
executive-, JIS B5-, A4-, A5-, and custom-size media.
■ An optional 500-sheet paper feeder (tray 3) that supports letter-,
legal-, executive-, JIS B5-, A4-, A5-, and custom-size media (the tray is standard on HP Color LaserJet 4600dtn, 4600hdn, and 4650dtn printers).
NOTE The optional 500-sheet paper feeder is available
only for the HP Color LaserJet 4600 and 4650 models.
■ An optional 2 x 500-sheet paper feeder (tray 3/tray 4) that supports
letter-, legal-, executive-, JIS B5-, 16K-, A4-, A5-, and custom-size media (the tray is standard on the HP Color LaserJet 4650hdn printer).
NOTE The 2 x 500-sheet feeder is available only for the
HP Color LaserJet 4650 models.
■ Includes built-in 2-sided printing on the HP Color LaserJet 4600dn,
4600dtn, 4600hdn, 4650dn, 4650dtn, and 4650hdn printers (not included with the HP Color LaserJet 4610n printer).
■ Includes a 250-sheet face-down output bin.
6 Chapter 1 Product information ENWW
Table 1-4 Printer features (continued)
Feature Description
Accessories ■ Printer hard disk, which provides storage for fonts and macros as
well as job storage. To determine if your model contains a hard disk, see Model configurations.
NOTE The hard disk is standard on the HP Color LaserJet
4600hdn and 4650hdn printers. It is not available for the HP Color LaserJet 4610n printer.)
■ HP CLJ 4600 models: Dual inline memory modules (DIMMs).
■ HP CLJ 4610n and 4650 models: 32 MB CompactFlash memory
(with firmware).
■ Printer stand.
■ Optional 500-sheet paper feeder (tray 3) that supports letter-, legal-,
executive-, JIS B5-, A4-, A5-, and custom-size media.
NOTE The feeder is standard on HP Color LaserJet
4600dtn, 4600hdn, and 4650dtn printers. It is not available for the HP Color LaserJet 4610n printer.
■ HP CLJ 4650 models: Optional 2 x 500-sheet paper feeder (tray
3/4) that supports letter-, legal-, executive-, JIS B5-, A4-, A5-, and custom-size media.
NOTE The feeder is standard on the HP Color LaserJet
4650hdn printer. It is not available for the HP CLJ 4600 models or the HP CLJ 4610n printer.
Connectivity
■ HP CLJ 4600 models: Fast InfraRed (FIR) pod.
■ HP CLJ 4610n model: One 200-pin DDR SDRAM slot for upgrading
the printer memory. The DDR SDRAM memory is available in 128, 256, and 512 MB modules.
■ HP CLJ 4650 models: Two 200-pin DDR SDRAM slots. One slot is
available for adding memory to the printer. The DDR SDRAM memory is available in 128 and 256 MB modules.
■ Optional enhanced input/output (EIO) network card.
NOTE The network card is standard on HP Color LaserJet
4600n, 4600dn, 4600dtn, 4600hdn, 4650n, 4650dn, 4650dtn, and 4650hdn printers. It is not available for the HP Color LaserJet 4610n printer.
■ Fast InfraRed (FIR) connection (HP CLJ 4600 models only).
■ HP Web Jetadmin software (
■ Standard bidirectional parallel cable interface (IEEE-1284 compliant).
■ HP CLJ 4650 models: Auxiliary connector.
■ HP CLJ 4610n and 4650 models: USB 1.1 connection.
www.hp.com/go/wegjetadmin_software).
ENWW Printer features 7
Table 1-4 Printer features (continued)
Feature Description
NOTE HP Color LaserJet 4610n and 4650 models: Both
USB and parallel connections are supported, but they cannot be used at the same time.
Supplies ■ A supplies-status page contains information about toner level, page
count, and estimated pages remaining.
■ Cartridges feature a no-shake design.
■ The printer checks for authentic HP print cartridges at cartridge
installation.
■ HP Color LaserJet 4600 and 4650 models: Internet-enabled supply-
ordering capabilities (by using the embedded Web server).
8 Chapter 1 Product information ENWW

Printer assemblies

HP Color LaserJet 4600 models

Figure 1-2 Front view, HP Color LaserJet 4600 models
1 Output bin
2 Printer control panel
3 Top cover
4 Front cover (includes tray 1)
5 Tray 2 (500-sheet standard tray)
6 Tray 3 (500-sheet paper feeder; optional)
7 On/off switch
8 Access to print cartridge, transfer unit, and fuser
Figure 1-3 Back view, HP Color LaserJet 4600 models
1 Output bin
ENWW Printer assemblies 9
2 On/off switch
3 Tray 3 500-sheet paper feeder (optional)
4 EIO connections (3 total)
5 Memory access
6 Fast InfraRed (FIR) connection
7 Parallel connection
8 Power connection

HP Color LaserJet 4610n printer

1 2
3
6
4
5
Figure 1-4 Front view, HP Color LaserJet 4610n printer
1 Output bin
2 Printer control panel
3 Top cover
4 Front cover (includes tray 1)
5 Tray 2 (500–sheet standard tray)
6 Access to print cartridges, transfer unit, and fuser
7 On/off switch
7
10 Chapter 1 Product information ENWW
Figure 1-5 Back view, HP Color LaserJet 4610n printer
1 Output bin
2 Parallel connection
3 On/off switch
4 Memory access
5 1.1 USB connection

HP Color LaserJet 4650 models

Figure 1-6 Front view, HP Color LaserJet 4650 models
1 Output bin
2 Printer control panel
3 Top cover
4 Front cover (includes tray 1)
5 Tray 2 (500-sheet standard tray)
6 Access to print cartridges, transfer unit, and fuser
ENWW Printer assemblies 11
7 On/off switch
8 Tray 3/tray 4 (optional)
NOTE The optional 500-sheet paper feeder (tray 3) and the optional 2 x 500-sheet input tray
(tray 3 and tray 4) cannot be installed in the printer at the same time.
Figure 1-7 Back view, HP Color LaserJet 4650 models
1 Output bin
2 Auxiliary connector
3 Parallel connection
4 On/off switch
5 EIO connection (3 total)
6 Memory access
7 1.1 USB connection
8 Tray 3/tray 4 (optional)
12 Chapter 1 Product information ENWW

Identification, site requirements, and specifications

The following sections describes printer identification, site requirements, and specifications.

Model and serial numbers

The model number and serial numbers are listed on identification labels located on the rear of the printer. The model number is alphanumeric, such as C9660A for an HP Color LaserJet 4600 printer. The serial number contains information about the country/region of origin, the printer version, production code, and the production number of the printer.
NOTE This manual describes the HP Color LaserJet 4600 Series printer, including the HP
Color LaserJet 4600 models, the HP Color LaserJet 4610n printer, and the HP Color LaserJet 4650 models.
country/region of origin
model (product) number
Hewlett-Packard
11311 Chinden Blvd.
Boise, Idaho 83704
U.S.A.
Serial No.:
Assembled in U.S.A. printer engine made in Japan
printer version
production code
50/60 Hz. 115V
Model No.: Q3668
JPBB605112
production number
Figure 1-8 Model and serial number label
Model name Product/model number
HP Color LaserJet 4600
HP Color LaserJet 4650
HP Color LaserJet 4600n
HP Color LaserJet 4610n
HP Color LaserJet 4650n
C9660A
Q3668A
C9692A
Q7732A
Q3669A
HP Color LaserJet 4600dn
HP Color LaserJet 4650dn
HP Color LaserJet 4600dtn
HP Color LaserJet 4650dtn
HP Color LaserJet 4600hdn
HP Color LaserJet 4650hdn
C9661A
Q3670A
C9662A
Q3671A
C9663A
Q3672A
ENWW Identification, site requirements, and specifications 13

Power and regulatory label

The identification labels on the rear of the printer also contain power-rating and regulatory information.
CAUTION Converting the voltage on the printer can damage the printer. Do not use any
voltage other than the operating voltage. Any attempt to convert operating voltages will void the product warranty (for example, attempting to change a 110 V printer to a 220 V printer).
Figure 1-9 Power and regulatory label

Site requirements

The printer must be kept in an appropriate location to maintain the performance level that has been set at the factory. In particular, be sure that the environment adheres to the specifications listed in this chapter.
The following are recommendations for the printer location and placement.
14 Chapter 1 Product information ENWW
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