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Make/Model Information:

  • Brand:   Hewlett-packard
  • Models included:
    • HP LaserJet 4500
    • HP LaserJet 4500 N
    • HP LaserJet 4500 DN

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English
  • Number of pages:   431
  • File size:  ∼ 9.58  MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   BMHP-1070

NOTE:  This list was created by program script and may not accurately represent the text from the source pages.   For full preview please click on 'Download sample':

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Service Manual October 1999 Edition
Hewlett-Packard Co.
Printed in USA
Manual Part No.
C4084-91077
HP Color LaserJet 4500, 4500 N, 4500 DN Printer Service Manual
4500, 4500 N, 4500 DN Printer
*C4084-91077*
*C4084-91077*
C4084-91077
Printed on at least
50% Total Recycled Fiber with
at least 10% Post-Consumer Paper
Contents v
Contents
List of figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii
List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii
1 Printer description
Printer features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Printer specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Printer assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Media requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Environmental Product Stewardship Program . . . . . . . . . . . . . . . . .22
Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
2 Service approach
Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Technical assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
3 Installation and configuration
Unpack the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Connecting to a network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Enhanced I/O (EIO) configuration . . . . . . . . . . . . . . . . . . . . . . . . . .62
Printer drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Network configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Configuration tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Setting network security on the printer. . . . . . . . . . . . . . . . . . . . . . .68
4 Printer maintenance
Cleaning the printer and accessories . . . . . . . . . . . . . . . . . . . . . . .72
Approximate replacement intervals for consumable items. . . . . . . .74
Locating consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Replacing consumable items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
DIMM configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
vi Contents
5 Theory of operation
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Basic operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Toner density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Mechanical system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121
DC controller subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
Power supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
6 Removal and replacement
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
Consumable assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Covers, drawers, top, and front assemblies . . . . . . . . . . . . . . . . . .149
Right side assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173
Left side assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190
Rear assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
7 Troubleshooting
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219
Troubleshooting process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220
Printer error troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225
Paper path troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255
Image formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .262
Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Overhead transparency defects . . . . . . . . . . . . . . . . . . . . . . . . . . .286
Repetitive defects troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .288
Interface troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292
Control panel troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .297
Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306
Service mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311
Diagnostics mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .320
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .330
8 Parts and diagrams
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351
Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352
Illustrations and parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357
Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386
Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .393
List of figures vii
List of figures
Figure 1-1 HP Color LaserJet 4500 family printers . . . . . . . . . . . .2
Figure 1-2 Serial number information. . . . . . . . . . . . . . . . . . . . . . .5
Figure 1-3 Sample label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Figure 1-4 Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 1-5 Front view (shown with 500-sheet paper feeder
and duplex unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 1-6 Rear view (shown with 500-sheet paper feeder
and duplex unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 3-1 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Figure 3-2 Parallel cable with a “C” connector. . . . . . . . . . . . . . .53
Figure 4-1 Imaging drum life . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Figure 4-2 OPC life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Figure 4-3 Location of consumables . . . . . . . . . . . . . . . . . . . . . .78
Figure 4-4 Removing the formatter board . . . . . . . . . . . . . . . . . .92
Figure 4-5 Do not remove the DIMM in slot #4. . . . . . . . . . . . . . .93
Figure 4-6 EDO and SDRAM memory modules . . . . . . . . . . . . .93
Figure 5-1 Basic system operation. . . . . . . . . . . . . . . . . . . . . . . .97
Figure 5-2 Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Figure 5-3 Primary charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Figure 5-4 Laser exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Figure 5-5 Development. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Figure 5-6 Primary transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Figure 5-7 Secondary transfer . . . . . . . . . . . . . . . . . . . . . . . . . .103
Figure 5-8 Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Figure 5-9 ITB residual toner cleaning. . . . . . . . . . . . . . . . . . . .105
Figure 5-10 Waste toner to waste toner reservoir . . . . . . . . . . . .106
Figure 5-11 Fuser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Figure 5-12 Toner density sensor . . . . . . . . . . . . . . . . . . . . . . . .108
Figure 5-13 Photosensitive drum cartridge . . . . . . . . . . . . . . . . .109
Figure 5-14 Waste toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Figure 5-15 Transfer unit function . . . . . . . . . . . . . . . . . . . . . . . .111
Figure 5-16 Home position detection . . . . . . . . . . . . . . . . . . . . . .112
Figure 5-17 ITB unit life detection . . . . . . . . . . . . . . . . . . . . . . . .113
Figure 5-18 Secondary transfer roller unit . . . . . . . . . . . . . . . . . .114
Figure 5-19 ITB unit contact/separation unit . . . . . . . . . . . . . . . .115
Figure 5-20 Toner carousel assembly . . . . . . . . . . . . . . . . . . . . .116
Figure 5-21 Toner carousel operation . . . . . . . . . . . . . . . . . . . . .117
Figure 5-22 Toner cartridge contact/separation function . . . . . . .118
Figure 5-23 Toner level detection/toner cartridge detection. . . . .119
Figure 5-24 Laser/scanner operation. . . . . . . . . . . . . . . . . . . . . .120
Figure 5-25 Paper jam sensors . . . . . . . . . . . . . . . . . . . . . . . . . .122
Figure 5-26 Tray 2 (cassette) operation. . . . . . . . . . . . . . . . . . . .124
Figure 5-27 Tray 1 manual feed. . . . . . . . . . . . . . . . . . . . . . . . . .125
Figure 5-28 Laser paper detected . . . . . . . . . . . . . . . . . . . . . . . .126
viii List of figures
Figure 5-29 Overhead transparency sensor . . . . . . . . . . . . . . . .127
Figure 5-30 Pick-up and feed system . . . . . . . . . . . . . . . . . . . . .129
Figure 5-31 Fusing and delivery unit . . . . . . . . . . . . . . . . . . . . . .131
Figure 5-32 Reversing and duplex pick-up operation . . . . . . . . .133
Figure 5-33 Reversing operation . . . . . . . . . . . . . . . . . . . . . . . . .134
Figure 5-34 Side registration adjustment . . . . . . . . . . . . . . . . . . .135
Figure 5-35 Duplex feed roller pressure. . . . . . . . . . . . . . . . . . . .136
Figure 5-36 DC controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . .137
Figure 5-37 Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Figure 6-1 Phillips vs. Posidriv screwdrivers . . . . . . . . . . . . . . .146
Figure 6-2 Top cover removal and replacement (rear view of
printer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
Figure 6-3 Left side cover removal and replacement. . . . . . . . .150
Figure 6-4 Right side cover removal and replacement. . . . . . . .151
Figure 6-5 Rear door removal and replacement . . . . . . . . . . . .152
Figure 6-6 Right rear cover removal and replacement. . . . . . . .153
Figure 6-7 Drum drawer (top drawer) cover removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
Figure 6-8 Drum drawer (top drawer) cover tabs and levers . . .155
Figure 6-9 ITB drawer (middle drawer) cover removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156
Figure 6-10 ITB drawer (middle drawer) removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
Figure 6-11 Control panel removal and replacement. . . . . . . . . .158
Figure 6-12 Front right cover removal and replacement . . . . . . .159
Figure 6-13 RFI shield removal and replacement . . . . . . . . . . . .160
Figure 6-14 Laser/scanner assembly removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
Figure 6-15 DC controller removal and replacement . . . . . . . . . .162
Figure 6-16 Developing PCB removal and replacement (1 of 2) .163
Figure 6-17 Developing PCB removal and replacement (2 of 2) .164
Figure 6-18 Top cover switch assembly removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .166
Figure 6-19 Top cover switch assembly removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167
Figure 6-20 Drum drawer (top drawer) switch . . . . . . . . . . . . . . .168
Figure 6-21 Drum drawer (top drawer) assembly removal
and replacement (1 of 3). . . . . . . . . . . . . . . . . . . . . .169
Figure 6-22 Drum drawer (top drawer) assembly removal
and replacement (2 of 3). . . . . . . . . . . . . . . . . . . . . .170
Figure 6-23 Drum drawer assembly removal and
replacement (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . .170
Figure 6-24 Densitometer removal and replacement (1 of 2). . . .171
Figure 6-25 Densitometer removal and replacement (2 of 2). . . .172
Figure 6-26 Formatter removal and replacement. . . . . . . . . . . . .173
Figure 6-27 Formatter pan assembly removal and
replacement (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .175
List of figures ix
Figure 6-28 Formatter pan assembly removal and
replacement (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .176
Figure 6-29 Formatter pan assembly removal and
replacement (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .177
Figure 6-30 Formatter pan assembly removal and
replacement (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .178
Figure 6-31 Power supply removal and replacement. . . . . . . . . .179
Figure 6-32 High-voltage power supply removal and
replacement (newer version printers) . . . . . . . . . . . .181
Figure 6-33 High-voltage power supply removal and
replacement (older version printers). . . . . . . . . . . . .181
Figure 6-34 Drum drive assembly removal and replacement
(1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
Figure 6-35 Drum drive assembly removal and replacement
(2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183
Figure 6-36 Drum drive assembly removal and replacement
(3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184
Figure 6-37 Large fan removal and replacement (1 of 2). . . . . . .185
Figure 6-38 Large fan removal and replacement (2 of 2). . . . . . .186
Figure 6-39 Carousel drive assembly removal and
replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . .187
Figure 6-40 Carousel drive assembly removal and
replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . .188
Figure 6-41 Paper size switch removal and replacement . . . . . .189
Figure 6-42 Switch plate assembly removal and replacement. . .190
Figure 6-43 Paper feed PCB removal and replacement (1 of 3) .191
Figure 6-44 Paper feed PCB removal and replacement (2 of 3) .192
Figure 6-45 Paper feed PCB removal and replacement (3 of 3) .193
Figure 6-46 Fuser motor removal and replacement (1 of 2) . . . .194
Figure 6-47 Fuser motor removal and replacement (2 of 2) . . . .195
Figure 6-48 Paper path motor removal and replacement . . . . . .196
Figure 6-49 Paper pick solenoid removal and replacement. . . . .197
Figure 6-50 ITB cleaning roller clutch removal and replacement.198
Figure 6-51 ITB clutch assembly removal and replacement
(1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199
Figure 6-52 ITB clutch assembly removal and replacement
(2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200
Figure 6-53 Transfer roller cam clutch removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201
Figure 6-54 Left side gears removal and replacement (1 of 2) . .203
Figure 6-55 Left side gears removal and replacement (2 of 2) . .203
Figure 6-56 Large right side fan removal and replacement
(1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
Figure 6-57 Large right side fan removal and replacement
(2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
Figure 6-58 Left side fan removal and replacement (1 of 3) . . . .206
Figure 6-59 Left side fan removal and replacement (2 of 3) . . . .207
x List of figures
Figure 6-60 Left side fan removal and replacement (3 of 3) . . . .207
Figure 6-61 Rear paper path assembly removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208
Figure 6-62 Carousel housing assembly removal and
replacement (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .209
Figure 6-63 Carousel housing assembly removal and
replacement (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . .211
Figure 6-64 Carousel housing assembly removal and
replacement (left side view when facing printer)
(3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212
Figure 6-65 Carousel housing assembly removal and
replacement (right side view when facing printer)
(4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212
Figure 6-66 Paper transport assembly removal and
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213
Figure 6-67 Paper pick rollers removal and replacement. . . . . . .214
Figure 7-1 Troubleshooting flowchart (1 of 2) . . . . . . . . . . . . . .222
Figure 7-2 Troubleshooting flowchart (2 of 2) . . . . . . . . . . . . . .223
Figure 7-3 Paper jam sensors . . . . . . . . . . . . . . . . . . . . . . . . . .255
Figure 7-4 Paper jam locations . . . . . . . . . . . . . . . . . . . . . . . . .256
Figure 7-5 Paper jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257
Figure 7-6 Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . .262
Figure 7-7 Color balance calibration page . . . . . . . . . . . . . . . . .269
Figure 7-8 Imaging drum exposed to light (not to scale) . . . . . .291
Figure 7-9 Menu map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298
Figure 7-10 Printer configuration page. . . . . . . . . . . . . . . . . . . . .307
Figure 7-11 Service mode menu map . . . . . . . . . . . . . . . . . . . . .311
Figure 7-12 Service menu map . . . . . . . . . . . . . . . . . . . . . . . . . .312
Figure 7-13 Registration page . . . . . . . . . . . . . . . . . . . . . . . . . . .317
Figure 7-15 Sensor locations . . . . . . . . . . . . . . . . . . . . . . . . . . . .330
Figure 7-16 Printer solenoids and clutches . . . . . . . . . . . . . . . . .332
Figure 7-17 Printer motors and fans . . . . . . . . . . . . . . . . . . . . . .333
Figure 7-18 Miscellaneous sensors and clutches . . . . . . . . . . . .334
Figure 7-19 Intermediate transfer belt sensors . . . . . . . . . . . . . .335
Figure 7-20 Miscellaneous sensors (with tray 1 front cover
removed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .336
Figure 7-21 PS6 and PS7 sensor location . . . . . . . . . . . . . . . . . .337
Figure 7-22 Miscellaneous switches . . . . . . . . . . . . . . . . . . . . . .338
Figure 7-23 Miscellaneous switches and sensors . . . . . . . . . . . .339
Figure 7-24 PS14 sensor location . . . . . . . . . . . . . . . . . . . . . . . .340
Figure 7-25 Miscellaneous parts . . . . . . . . . . . . . . . . . . . . . . . . .341
Figure 7-26 Imaging drum connector . . . . . . . . . . . . . . . . . . . . . .342
Figure 7-27 Rear door interlock switch defeat . . . . . . . . . . . . . . .343
Figure 7-28 Right rear fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .344
Figure 7-29 Fuse (F1) and CB101 . . . . . . . . . . . . . . . . . . . . . . . .345
Figure 7-30 Fusing assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . .346
Figure 7-31 DC controller PCB connectors . . . . . . . . . . . . . . . . .347
List of figures xi
Figure 7-32 Location of connectors . . . . . . . . . . . . . . . . . . . . . . .348
Figure 7-33 Location of duplexer and 500-sheet paper feeder
connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .349
Figure 7-34 500-sheet feeder wiring diagram . . . . . . . . . . . . . . .350
Figure 8-1 Assembly location diagram (1 of 2) . . . . . . . . . . . . .358
Figure 8-2 Assembly location diagram (2 of 2) . . . . . . . . . . . . .359
Figure 8-3 PCB locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .360
Figure 8-4 External covers, panels, etc.. . . . . . . . . . . . . . . . . . .362
Figure 8-5 Top cover assembly . . . . . . . . . . . . . . . . . . . . . . . . .364
Figure 8-6 Internal components (1 of 3). . . . . . . . . . . . . . . . . . .366
Figure 8-7 Internal components (2 of 3). . . . . . . . . . . . . . . . . . .368
Figure 8-8 Internal components (3 of 3). . . . . . . . . . . . . . . . . . .370
Figure 8-9 Developing carousel assembly. . . . . . . . . . . . . . . . .372
Figure 8-10 Paper pick-up assembly (1 of 3). . . . . . . . . . . . . . . .374
Figure 8-11 Paper pick-up assembly (2 of 3). . . . . . . . . . . . . . . .376
Figure 8-12 Paper pick-up assembly (3 of 3). . . . . . . . . . . . . . . .378
Figure 8-13 Upper drawer assembly . . . . . . . . . . . . . . . . . . . . . .380
Figure 8-14 MP tray paper pick-up assembly . . . . . . . . . . . . . . .381
Figure 8-15 250-sheet cassette . . . . . . . . . . . . . . . . . . . . . . . . . .382
Figure 8-16 500-sheet paper feeder . . . . . . . . . . . . . . . . . . . . . .384
Figure 8-17 Duplex unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385
xii List of tables
List of tables
Table 1-1 Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Table 1-2 Model names and numbers . . . . . . . . . . . . . . . . . . . . .5
Table 1-3 Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . .9
Table 1-4 Environmental specifications . . . . . . . . . . . . . . . . . . . .9
Table 1-5 Consumable storage requirements. . . . . . . . . . . . . . .10
Table 1-6 Printer dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 1-7 Acoustic emissions . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 1-8 Supported media specifications . . . . . . . . . . . . . . . . .15
Table 1-9 Printing on transparencies . . . . . . . . . . . . . . . . . . . . .18
Table 2-1 Related documentation and software . . . . . . . . . . . . .35
Table 4-1 Cleaning the printer . . . . . . . . . . . . . . . . . . . . . . . . . .73
Table 4-2 Approximate replacement interval for consumable
items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Table 5-1 Toner carousel assembly components . . . . . . . . . . .116
Table 5-2 Motors, solenoids, sensors, and switches . . . . . . . .124
Table 5-3 Motors, solenoids, clutches, and sensors. . . . . . . . .125
Table 5-4 Solenoids, sensors, switches . . . . . . . . . . . . . . . . . .129
Table 5-5 Paper size detection switches . . . . . . . . . . . . . . . . .130
Table 5-6 Fusing and delivery unit components . . . . . . . . . . . .131
Table 5-7 Motors, solenoids, and sensors . . . . . . . . . . . . . . . .133
Table 5-8 Motor and fan locations . . . . . . . . . . . . . . . . . . . . . .138
Table 6-1 Types of screws . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
Table 6-2 Approximate replacement interval for consumable
items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Table 7-1 Pre-troubleshooting checklist . . . . . . . . . . . . . . . . . .220
Table 7-2 Alphabetical printer error messages . . . . . . . . . . . . .226
Table 7-3 Numerical printer error messages. . . . . . . . . . . . . . .239
Table 7-4 Paper jam locations and associated error
messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .258
Table 7-5 Explanation of alternating message . . . . . . . . . . . . .258
Table 7-6 Image defect table . . . . . . . . . . . . . . . . . . . . . . . . . .272
Table 7-7 Defect spacing chart . . . . . . . . . . . . . . . . . . . . . . . . .290
Table 7-8 Communications checks. . . . . . . . . . . . . . . . . . . . . .292
Table 7-9 Information Menu . . . . . . . . . . . . . . . . . . . . . . . . . . .299
Table 7-10 Paper Handling Menu . . . . . . . . . . . . . . . . . . . . . . . .300
Table 7-11 Configuration settings . . . . . . . . . . . . . . . . . . . . . . . .301
Table 7-12 Printing Menu settings . . . . . . . . . . . . . . . . . . . . . . .302
Table 7-13 I/O Menu settings . . . . . . . . . . . . . . . . . . . . . . . . . . .303
Table 7-14 Calibration Menu settings . . . . . . . . . . . . . . . . . . . . .304
Table 7-15 Resets Menu settings . . . . . . . . . . . . . . . . . . . . . . . .305
Table 7-16 Formatter diagnostics . . . . . . . . . . . . . . . . . . . . . . . .321
Table 7-17 Engine diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . .322
Table 7-18 Paper path sensors and switches. . . . . . . . . . . . . . .325
Table 7-19 Paper size settings . . . . . . . . . . . . . . . . . . . . . . . . . .326
List of tables xiii
Table 7-20 Sensor status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327
Table 7-21 Sensor function and locations. . . . . . . . . . . . . . . . . .331
Table 7-22 Solenoid and clutch functions and locations. . . . . . .332
Table 7-23 Printer motors and fans . . . . . . . . . . . . . . . . . . . . . .333
Table 7-24 Miscellaneous sensors and clutches . . . . . . . . . . . .334
Table 7-25 Intermediate transfer belt sensors . . . . . . . . . . . . . .335
Table 7-26 PS3 and PS4 description . . . . . . . . . . . . . . . . . . . . .336
Table 7-27 PS6 and PS7 description . . . . . . . . . . . . . . . . . . . . .337
Table 7-28 Switch description. . . . . . . . . . . . . . . . . . . . . . . . . . .338
Table 7-29 SW2, SW5, and PS13 description . . . . . . . . . . . . . .339
Table 7-30 Density sensor location. . . . . . . . . . . . . . . . . . . . . . .340
Table 7-31 Miscellaneous parts . . . . . . . . . . . . . . . . . . . . . . . . .341
Table 7-32 Imaging drum connector. . . . . . . . . . . . . . . . . . . . . .342
Table 7-33 Fuse F1 and CB101 location . . . . . . . . . . . . . . . . . .345
Table 7-34 110-volt fusing assembly . . . . . . . . . . . . . . . . . . . . .346
Table 8-1 Consumables, accessories, and supplies . . . . . . . .353
Table 8-2 Types of screws . . . . . . . . . . . . . . . . . . . . . . . . . . . .356
Table 8-3 PCB assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361
Table 8-4 Printer cover and door . . . . . . . . . . . . . . . . . . . . . . .362
Table 8-5 Top cover components . . . . . . . . . . . . . . . . . . . . . . .365
Table 8-6 Internal components (1 of 3). . . . . . . . . . . . . . . . . . .366
Table 8-7 Internal components (2 of 3). . . . . . . . . . . . . . . . . . .369
Table 8-8 Internal components (3 of 3). . . . . . . . . . . . . . . . . . .371
Table 8-9 Developing carousel assembly. . . . . . . . . . . . . . . . .372
Table 8-10 Paper pick-up assembly (1 of 3). . . . . . . . . . . . . . . .375
Table 8-11 Paper pick-up assembly (2 of 3). . . . . . . . . . . . . . . .376
Table 8-12 Paper pick-up assembly (3 of 3). . . . . . . . . . . . . . . .378
Table 8-13 Upper drawer assembly . . . . . . . . . . . . . . . . . . . . . .380
Table 8-14 MP tray paper pick-up assembly . . . . . . . . . . . . . . .381
Table 8-15 250-sheet cassette . . . . . . . . . . . . . . . . . . . . . . . . . .383
Table 8-16 500-sheet paper feeder . . . . . . . . . . . . . . . . . . . . . .384
Table 8-17 Duplex unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385
Table 8-18 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . .386
Table 8-19 Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . .393
xiv List of tables
Chapter 1 Printer description 1
1 Printer description
Chapter contents
Printer features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Model and serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Power and regulatory information . . . . . . . . . . . . . . . . . . . . . . . .6
Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Space requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Consumable storage requirements . . . . . . . . . . . . . . . . . . . . . .10
Printer specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Printer assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Media requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Selecting print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Supported media weights and sizes . . . . . . . . . . . . . . . . . . . . .15
Non-supported media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Printing on special media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Environmental Product Stewardship Program . . . . . . . . . . . . . . . . .22
Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
FCC regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Canadian DOC regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
VCCI statement (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Korean EMI statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Laser safety statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Material Safety Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Toner safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Laser statement for Finland . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2 Printer features
Printer features
The HP LaserJet 4500 printer family pictured in Figure 1-1 has three
models.
 The HP LaserJet 4500 printer is the base model; it includes
32 MB of RAM.
 The HP LaserJet 4500 N printer includes the base model with an
HP JetDirect 600N print server (network card) and 64 MB of
 The HP LaserJet 4500 DN printer includes the base model with
an HP JetDirect 600N print server (network card), a 500-sheet
paper feeder, a duplex unit, and 64 MB of RAM.
Figure 1-1 HP Color LaserJet 4500 family printers
1 HP Color LaserJet 4500 and 4500 N printers
2 HP Color LaserJet 4500 DN printer
Chapter 8 Parts and diagrams 351
8 Parts and diagrams
Chapter contents
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351
Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352
Consumables, accessories, and supplies . . . . . . . . . . . . . . . .352
Common fasteners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .356
Illustrations and parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357
Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386
Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .393
Introduction
The figures in this chapter show the major subassemblies in the
printer and their component parts. A table (materials list) follows each
exploded assembly diagram. Each table lists the reference designator
(item number), the associated part number, quantity, and description
of each part.
Note When looking for a part number, pay careful attention to the voltage
listed in the description column to ensure that the part number selected
is for the correct printer model.
358 Illustrations and parts lists
Figure 8-1 Assembly location diagram (1 of 2)


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