HP 8550 MFP, 8550 GN, 8550 DN, 8550 N, 8500 DN Service Manual
...
8500/8550 Printer Family
Service Manual
English
HP Color LaserJet 8500/8550
Printer Family
Service Manual
Copyright Information
© 2000 Hewlett-Packard
Company
All Rights Reserved.
Reproduction, adaptations, or
translation without prior written
permission is prohibited except
as allowed under copyright
laws.
Part number C7096-90967
First edition, April 2000
Printed in USA
Warranty
The information contained in
this document is subject to
change without notice.
Hewlett-Packard makes no
warranty of any kind with
respect to this information.
HEWLETT-PACKARD
SPECIFICALLY DISCLAIMS
THE IMPLIED WARRANTY OF
MERCHANTABILITY AND
FITNESS FOR A PARTICULAR
PURPOSE.
Hewlett-Packard shall not be
liable for any direct, indirect,
incidental, consequential, or
other damage alleged in
connection with the furnishing or
use of this information.
NOTICE TO U.S.
GOVERNMENT USERS:
RESTRICTED RIGHTS
COMMERCIAL COMPUTER
SOFTWARE: “Use, duplication,
or disclosure by the
Government is subject to
restrictions as set forth in
subparagraph (c) (1)(ii) of the
Rights in Technical Data Clause
at DFARS 52.227-7013.”
Tra d ema rk Cred it s
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UNIX
in the United States and other
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through X/Open Company
Limited.
®
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®
Safety Information
WARNING
Electrical Shock Hazard
To avoid electrical shock, use
only supplied power cords and
connect only to properly
grounded (3-hole) wall outlets.
Hewlett-Packard Company
11311 Chinden Boulevard
Boise, Idaho 83714 USA
Table of Contents
1 Product information
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Media requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Identification (model and serial numbers) . . . . . . . . . . . . . . . . . .38
Printer Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
2 Service approach
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Parts and supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Technical assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
3 Operational overview
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Verifying package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Verifying the cables are installed. . . . . . . . . . . . . . . . . . . . . . . . . .74
Connecting the printer to the network . . . . . . . . . . . . . . . . . . . . . .76
Changing the printer control panel overlay . . . . . . . . . . . . . . . . . .79
Printer control panel layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Menu maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Selecting the display language . . . . . . . . . . . . . . . . . . . . . . . . . . .97
Installing the consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Configuring input trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Verifying the printer is installed correctly. . . . . . . . . . . . . . . . . . .105
Verifying DIMM installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Duplex registration (HP Color LaserJet 8550). . . . . . . . . . . . . . .107
Booklet printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
HP TonerGauge (HP Color LaserJet 8550) . . . . . . . . . . . . . . . .110
EN 3
4 Printer maintenance
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Cleaning procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
Printer consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
5 Theory of operation
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
Color theory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Consumable detection mechanisms . . . . . . . . . . . . . . . . . . . . . .154
Electrical systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164
Mechanical systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169
Paper path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Printer timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192
EPH controller board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199
Duplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199
2,000-sheet input unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199
Multi-bin mailbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
3,000-sheet stapler/stacker. . . . . . . . . . . . . . . . . . . . . . . . . . . . .211
6 Removal and replacement
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222
Maintenance units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224
Doors and covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225
Top assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
Front assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251
Left assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
Right assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261
Rear assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .270
2,000-sheet input unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298
Multi-bin mailbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314
3,000-sheet stapler/stacker and 3,000 -sheet stacker . . . . . . . . .338
4 Contents EN
7 Troubleshooting
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363
Pre-troubleshooting checklist . . . . . . . . . . . . . . . . . . . . . . . . . . .367
Printer message troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . .368
Aids to troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .415
Paper path troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .433
Image formation troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . .438
Image defects troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .441
Color balance adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .457
Repetitive defects troubleshooting . . . . . . . . . . . . . . . . . . . . . . .462
Repetitive defects troubleshooting . . . . . . . . . . . . . . . . . . . . . . .463
2,000-sheet input unit troubleshooting . . . . . . . . . . . . . . . . . . . .469
Multi-bin mailbox troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .477
3,000-sheet stapler/stacker troubleshooting . . . . . . . . . . . . . . . .482
Communications troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .502
Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .503
8 Parts and diagrams
Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .511
Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .511
Illustrations and parts lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .516
Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .574
Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .587
Index
EN Contents 5
6 Contents EN
List of Figures
Figure 1. Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 2. Example of printer model number and serial
number label (110 V and 220 V). . . . . . . . . . . . . . . . 38
Figure 3. Front view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 4. Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 5. Formatter assemblies. . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 6. Media-handling accessories and options. . . . . . . . .44
Figure 7. Contents of printer box . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 8. Power cord connection. . . . . . . . . . . . . . . . . . . . . . . 74
Figure 9. C-link and power cables connections. . . . . . . . . . . .75
Figure 10. Network connections . . . . . . . . . . . . . . . . . . . . . . . . 76
Figure 11. Parallel cable connection . . . . . . . . . . . . . . . . . . . . . 78
Figure 12. Changing the printer control panel overlay. . . . . . . .79
Figure 13. Location of printer control panel features. . . . . . . . .80
Figure 14. Consumables installation . . . . . . . . . . . . . . . . . . . . . 98
Figure 15. DIMM slot configuration . . . . . . . . . . . . . . . . . . . . . 106
Figure 16. Duplex registration . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 17. Removing the toner catch tray cover . . . . . . . . . . .116
Figure 18. Cleaning the toner catch tray . . . . . . . . . . . . . . . . . 117
Figure 19. Location of consumables in printer. . . . . . . . . . . . .118
Figure 20. Contents of transfer kit . . . . . . . . . . . . . . . . . . . . . . 120
Figure 21. Contents of drum kit . . . . . . . . . . . . . . . . . . . . . . . . 124
Figure 22. Contents of fuser kit . . . . . . . . . . . . . . . . . . . . . . . . 127
Figure 23. Cross-section view of internal components . . . . . . 136
Figure 24. Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Figure 25. Electrostatic latent image formation block . . . . . . .142
Figure 26. Preconditioning exposure . . . . . . . . . . . . . . . . . . . . 143
Figure 27. Primary charging of imaging drum . . . . . . . . . . . . . 144
Figure 28. Black toner cartridge (left) and color toner
cartridge (right) development . . . . . . . . . . . . . . . . . 145
Figure 29. Primary transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Figure 30. Post charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Figure 31. Secondary transfer . . . . . . . . . . . . . . . . . . . . . . . . . 148
Figure 32. Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149
Figure 33. Cleaning roller charging . . . . . . . . . . . . . . . . . . . . . 150
Figure 34. Transfer drum cleaning. . . . . . . . . . . . . . . . . . . . . . 151
Figure 35. Imaging drum cleaning block . . . . . . . . . . . . . . . . . 152
Figure 36. Fusing the toner . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
EN 7
Figure 37. Waste toner level detection . . . . . . . . . . . . . . . . . . 155
Figure 38. Color toner level detection . . . . . . . . . . . . . . . . . . . 157
Figure 39. Color toner lever detection . . . . . . . . . . . . . . . . . . . 158
Figure 40. Density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Figure 41. Transfer belt control . . . . . . . . . . . . . . . . . . . . . . . . 161
Figure 42. Cleaning roller control. . . . . . . . . . . . . . . . . . . . . . . 162
Figure 43. Carousel control . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Figure 44. Power distribution circuit diagram. . . . . . . . . . . . . . 164
Figure 45. Power Save circuit diagram . . . . . . . . . . . . . . . . . . 165
Figure 46. High-voltage power supply circuit. . . . . . . . . . . . . . 168
Figure 47. Laser/scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Figure 48. Printer motors and heaters . . . . . . . . . . . . . . . . . . . 171
Figure 49. Carousel motor (M1). . . . . . . . . . . . . . . . . . . . . . . . 172
Figure 50. Drum motor (M2) . . . . . . . . . . . . . . . . . . . . . . . . . .173
Figure 51. Cartridge motor (M3) . . . . . . . . . . . . . . . . . . . . . . . 174
Figure 52. Main motor (M4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Figure 53. Pick-up motor (M5). . . . . . . . . . . . . . . . . . . . . . . . . 176
Figure 54. Paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Figure 55. Tray 2 and 3 pick-up. . . . . . . . . . . . . . . . . . . . . . . . 181
Figure 56. Tray 1 pick-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Figure 57. Printer sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Figure 58. Printer switches . . . . . . . . . . . . . . . . . . . . . . . . . . .186
Figure 59. Printer clutches and solenoids . . . . . . . . . . . . . . . . 189
Figure 60. Fusing and delivery unit . . . . . . . . . . . . . . . . . . . . . 191
Figure 61. Timing chart for WAIT period (1 of 2) . . . . . . . . . . .193
Figure 62. Timing chart for WAIT period (2 of 2) . . . . . . . . . . .194
Figure 63. Timing chart, printing full-color letter-sized
page (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Figure 64. Timing chart, printing full-color letter-sized
page (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Figure 65. Timing chart, printing full-color 11-by-17-inch
page (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Figure 66. Timing chart, printing full-color 11-by-17 inch
page (2 of 2) 198
Figure 67. 2,000-sheet input unit sensors, switches,
clutches, and motors . . . . . . . . . . . . . . . . . . . . . . . 200
Figure 68. 2,000-sheet input unit paper path. . . . . . . . . . . . . .204
Figure 69. Multi-bin mailbox cabling . . . . . . . . . . . . . . . . . . . . 207
Figure 70. Multi-bin mailbox sensors . . . . . . . . . . . . . . . . . . . . 208
Figure 71. Multi-bin mailbox paper path . . . . . . . . . . . . . . . . . 210
Figure 72. C-link cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Figure 73. Stapler/stacke r paper path and sensors. . . . . . . . .215
Figure 74. Stacker paper path and sensors. . . . . . . . . . . . . . . 216
8 List of Figures EN
Figure 75. Orientation of printer and accessor ies:
top, front, and right . . . . . . . . . . . . . . . . . . . . . . . . . 225
Figure 76. Orientation of printer and accessor ies:
rear and left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Figure 77. Attachment bracket, HP Color LaserJe t 85 5 0
MFP printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Figure 78. Locking pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Figure 79. Removing the front cover . . . . . . . . . . . . . . . . . . . . 228
Figure 80. Front right cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Figure 81. Inside left panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Figure 82. Filler panel for tray 2. . . . . . . . . . . . . . . . . . . . . . . .231
Figure 83. Screws behind left door . . . . . . . . . . . . . . . . . . . . . 232
Figure 84. Screws behind right door . . . . . . . . . . . . . . . . . . . . 232
Figure 85. Connector on top cover . . . . . . . . . . . . . . . . . . . . . 233
Figure 86. Left door and strap . . . . . . . . . . . . . . . . . . . . . . . . . 234
Figure 87. Screws on left rear cover . . . . . . . . . . . . . . . . . . . . 235
Figure 88. Screws on upper left door. . . . . . . . . . . . . . . . . . . . 236
Figure 89. Stopper hinges on lower left cover . . . . . . . . . . . . .237
Figure 90. Connectors on the right upper door . . . . . . . . . . . . 238
Figure 91. E-ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Figure 92. Spring on right cover subassembly . . . . . . . . . . . . 240
Figure 93. Right rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Figure 94. Screws on the right lower cover . . . . . . . . . . . . . . . 242
Figure 95. Plate, HP Color LaserJet 8550 MFP printer . . . . . . 243
Figure 96. Rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Figure 97. Bottom of the control panel. . . . . . . . . . . . . . . . . . . 246
Figure 98. Laser/scanner shield . . . . . . . . . . . . . . . . . . . . . . . 247
Figure 99. Scanner unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Figure 100. Upper airflow vent. . . . . . . . . . . . . . . . . . . . . . . . . . 249
Figure 101. Face-down exit sensor rail . . . . . . . . . . . . . . . . . . . 249
Figure 102. Face-down output assembly. . . . . . . . . . . . . . . . . . 250
Figure 103. Toner lock sensor and color cartridge sensor . . . . 251
Figure 104. Subrelay PCA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Figure 105. Formatter board . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Figure 106. Connector on formatter board . . . . . . . . . . . . . . . . 256
Figure 107. Back side of formatter board . . . . . . . . . . . . . . . . . 256
Figure 108. Feeder assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Figure 109. Face-up solenoid (1 of 2) . . . . . . . . . . . . . . . . . . . . 258
Figure 110. Face-up solenoid (2 of 2) . . . . . . . . . . . . . . . . . . . . 259
Figure 111. Screws on the face-up exit assembly. . . . . . . . . . .260
Figure 112. Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Figure 113. Pick-up roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Figure 114. Registration roller assembly (front). . . . . . . . . . . . . 263
Figure 115. Registration roller assembly (back) . . . . . . . . . . . . 264
EN List of Figures 9
Figure 116. Connectors on registration roller assembly . . . . . .265
Figure 117. Density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Figure 118. Paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . 267
Figure 119. Tray 1 pick-up assembly (1 of 2) . . . . . . . . . . . . . .268
Figure 120. Tray 1 pick-up assembly (2 of 2) . . . . . . . . . . . . . .269
Figure 121. Rear of printer with cover removed . . . . . . . . . . . . 270
Figure 122. Rear of printer with formatter pan removed . . . . . .271
Figure 123. Formatter pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Figure 124. Formatter pan (left side) . . . . . . . . . . . . . . . . . . . . . 273
Figure 125. Fan 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Figure 126. Fan 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Figure 127. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Figure 128. Controller board, HP Color LaserJet 8550
MFP printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Figure 129. Controller board, HP Color LaserJet 8500 printer .278
Figure 130. ECO board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Figure 131. Cartridge motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Figure 132. Main motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Figure 133. Carousel motor PCA. . . . . . . . . . . . . . . . . . . . . . . . 282
Figure 134. Fans 1 and 2 housing assemblies . . . . . . . . . . . . .283
Figure 135. Carousel motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Figure 136. Lower air duct. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Figure 137. Screws on the delivery drive assembly . . . . . . . . .286
Figure 138. Access to main gear assembly. . . . . . . . . . . . . . . . 287
Figure 139. Developer/imaging drum bias supply,
HP Color LaserJet 8550 printer . . . . . . . . . . . . . . . 288
Figure 140. Developer/imaging drum bias supply . . . . . . . . . . . 289
Figure 141. Post charger HV module . . . . . . . . . . . . . . . . . . . . 290
Figure 142. High-voltage power supply . . . . . . . . . . . . . . . . . . . 291
Figure 143. Cleaning roller HV module . . . . . . . . . . . . . . . . . . .292
Figure 144. Main relay PCA. . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Figure 145. Drum/cartridge drive assembly. . . . . . . . . . . . . . . . 294
Figure 146. Separation discharge high-voltage converter. . . . . 295
Figure 147. Plate over media size sensing PCAs . . . . . . . . . . .296
Figure 148. Media size sensing PCAs. . . . . . . . . . . . . . . . . . . . 297
Figure 149. Front cover of the 2,000-sheet input unit . . . . . . . .299
Figure 150. Back cover removal . . . . . . . . . . . . . . . . . . . . . . . . 300
Figure 151. Left cover removal . . . . . . . . . . . . . . . . . . . . . . . . . 301
Figure 152. Vertical transfer unit . . . . . . . . . . . . . . . . . . . . . . . . 302
Figure 153. Right cover with VTU removed. . . . . . . . . . . . . . . . 304
Figure 154. Tray 4 removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Figure 155. Paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . 306
Figure 156. Controller PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Figure 157. Screw on front LED PCA assembly . . . . . . . . . . . .308
10 List of Figures EN
Figure 158. Front LED PCA. . . . . . . . . . . . . . . . . . . . . . . . . . . .308
Figure 159. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Figure 160. Main drive assembly. . . . . . . . . . . . . . . . . . . . . . . . 310
Figure 161. Paper quantity switch assembly . . . . . . . . . . . . . . . 311
Figure 162. Paper size switch assembly . . . . . . . . . . . . . . . . . .312
Figure 163. Tension springs . . . . . . . . . . . . . . . . . . . . . . . . . . .313
Figure 164. Front and back covers . . . . . . . . . . . . . . . . . . . . . . 315
Figure 165. Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Figure 166. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Figure 167. Paper bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Figure 168. Flipper assembly (1 of 3) . . . . . . . . . . . . . . . . . . . .319
Figure 169. Flipper assembly (2 of 3) . . . . . . . . . . . . . . . . . . . .319
Figure 170. Flipper assembly (3 of 3) . . . . . . . . . . . . . . . . . . . .320
Figure 171. Delivery head motor . . . . . . . . . . . . . . . . . . . . . . . . 321
Figure 172. Transport belt motor . . . . . . . . . . . . . . . . . . . . . . . . 322
Figure 173. Input paper guide (1 of 2) . . . . . . . . . . . . . . . . . . . . 323
Figure 174. Input paper guide (2 of 2) . . . . . . . . . . . . . . . . . . . . 324
Figure 175. Metallic tape and housing assembly (1 of 2) . . . . . 325
Figure 176. Metallic tape and housing assembly (2 of 2) . . . . . 326
Figure 177. Controller PCA (1 of 2) . . . . . . . . . . . . . . . . . . . . . . 327
Figure 178. Controller PCA (2 of 2) . . . . . . . . . . . . . . . . . . . . . . 328
Figure 179. Anti-curl strings (1 of 2) . . . . . . . . . . . . . . . . . . . . . 329
Figure 180. Anti-curl strings (2 of 2) . . . . . . . . . . . . . . . . . . . . . 330
Figure 181. Delivery head assembly (1 of 4) . . . . . . . . . . . . . . .331
Figure 182. Delivery head assembly (2 of 4) . . . . . . . . . . . . . . .332
Figure 183. Delivery head assembly (3 of 4) . . . . . . . . . . . . . . .332
Figure 184. Delivery head assembly (4 of 4) . . . . . . . . . . . . . . .333
Figure 185. Interlock switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Figure 186. Diagnostic LED PCA . . . . . . . . . . . . . . . . . . . . . . . 335
Figure 187. User status LED PCA. . . . . . . . . . . . . . . . . . . . . . .336
Figure 188. Attachment assembly . . . . . . . . . . . . . . . . . . . . . . . 337
Figure 189. Bins removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .339
Figure 190. Front and back covers removal . . . . . . . . . . . . . . . 340
Figure 191. Foot cover removal. . . . . . . . . . . . . . . . . . . . . . . . . 341
Figure 192. Stapler door assembly and controller PCA
cover removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Figure 193. Flipper assembly removal (1 of 2) . . . . . . . . . . . . . 343
Figure 194. Flipper assembly removal (2 of 2) . . . . . . . . . . . . . 344
Figure 195. Carriage assembly removal (1 of 2) . . . . . . . . . . . . 345
Figure 196. Carriage assembly removal (2 of 2) . . . . . . . . . . . . 346
Figure 197. Accumulator assembly removal (1 of 2) . . . . . . . . .347
Figure 198. Accumulator assembly removal (2 of 2) . . . . . . . . .348
Figure 199. Offset module removal . . . . . . . . . . . . . . . . . . . . . . 349
EN List of Figures 11
Figure 200. Stapler removal (1 of 3) . . . . . . . . . . . . . . . . . . . . . 350
Figure 201. Stapler removal (2 of 3) . . . . . . . . . . . . . . . . . . . . . 351
Figure 202. Stapler removal (3 of 3) . . . . . . . . . . . . . . . . . . . . . 352
Figure 203. Stapler/stacker controller PCA or
stacker controller PCA removal . . . . . . . . . . . . . . .353
Figure 204. LED PCA removal . . . . . . . . . . . . . . . . . . . . . . . . . 354
Figure 205. Power supply removal . . . . . . . . . . . . . . . . . . . . . . 355
Figure 206. Interlock switch removal . . . . . . . . . . . . . . . . . . . . . 356
Figure 207. Safety switch assembly removal . . . . . . . . . . . . . .357
Figure 208. Attachment assembly removal . . . . . . . . . . . . . . . . 358
Figure 209. Flipper ribbon cable removal . . . . . . . . . . . . . . . . . 359
Figure 210. Stationary caster removal. . . . . . . . . . . . . . . . . . . . 360
Figure 211. Adjustable caster removal . . . . . . . . . . . . . . . . . . . 361
Figure 212. Example of an HP Color LaserJet 8500 printer
configuration page . . . . . . . . . . . . . . . . . . . . . . . . . 417
Figure 213. Example of an HP Color LaserJet 8550 printer
configuration page . . . . . . . . . . . . . . . . . . . . . . . . . 417
Figure 214. Right upper cover detection interlock . . . . . . . . . . .425
Figure 215. Drum cartridge detection interlock . . . . . . . . . . . . .425
Figure 216. Black toner cartridge detection interlock. . . . . . . . . 426
Figure 217. Toner carousel door detection interlock . . . . . . . . . 426
Figure 218. Front cover/delivery cover detection interlocks . . .427
Figure 219. Laser shutters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428
Figure 220. Left upper cover detection . . . . . . . . . . . . . . . . . . . 429
Figure 221. Right lower cover detection . . . . . . . . . . . . . . . . . . 429
Figure 222. Printer paper path. . . . . . . . . . . . . . . . . . . . . . . . . . 435
Figure 223. Image orientatio n and direction of travel . . . . . . . . 442
Figure 224. Color-plane registration . . . . . . . . . . . . . . . . . . . . . 443
Figure 225. Developer streak . . . . . . . . . . . . . . . . . . . . . . . . . . 444
Figure 226. Rain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445
Figure 227. Toner bubbles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446
Figure 228. Charge roller set. . . . . . . . . . . . . . . . . . . . . . . . . . . 447
Figure 229. Waves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448
Figure 230. Missing toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . .449
Figure 231. Hot offset (glossy paper or transparency) . . . . . . . 450
Figure 232. Fading resulting from broken transfer guide. . . . . .451
Figure 233. Color adjust page . . . . . . . . . . . . . . . . . . . . . . . . . . 458
Figure 234. Repetitive defect ruler. . . . . . . . . . . . . . . . . . . . . . . 463
Figure 235. Cleaning the transfer drum . . . . . . . . . . . . . . . . . . . 466
Figure 236. Rear view of 2,000-sheet input unit . . . . . . . . . . . . 471
Figure 237. Location of sensors in the 2,000-sheet input unit. .475
Figure 238. Multi-bin mailbox power supply test mode switch. .477
Figure 239. Staple position . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483
Figure 240. Device timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485
12 List of Figures EN
Figure 241. Error format for paper handling . . . . . . . . . . . . . . . 493
Figure 242. Connectors on the controller board . . . . . . . . . . . .503
Figure 243. General printer circuit diagram (1 of 4). . . . . . . . . .504
Figure 244. General printer circuit diagram (2 of 4). . . . . . . . . .505
Figure 245. General printer circuit diagram (3 of 4). . . . . . . . . .506
Figure 246. General printer circuit diagram (4 of 4). . . . . . . . . .507
Figure 247. Major assembly locations (1 of 2). . . . . . . . . . . . . .517
Figure 248. Major assembly locations (2 of 2). . . . . . . . . . . . . .518
Figure 249. Printer covers and doors (1 of 4)—Filler panel for
tray 2 (HP Color LaserJet 8550 base model only) . 519
Figure 250. Printer covers and doors (2 of 4) . . . . . . . . . . . . . . 520
Figure 251. Printer covers and doors (3 of 4) . . . . . . . . . . . . . . 522
Figure 252. Printer covers and doors (4 of 4) . . . . . . . . . . . . . . 524
Figure 253. Internal cover assembly . . . . . . . . . . . . . . . . . . . . . 526
Figure 254. Internal components (1 of 6). . . . . . . . . . . . . . . . . . 528
Figure 255. Internal components (2 of 6). . . . . . . . . . . . . . . . . . 530
Figure 256. Internal components (3 of 6). . . . . . . . . . . . . . . . . . 532
Figure 257. Internal components (4 of 6). . . . . . . . . . . . . . . . . . 534
Figure 258. Internal components (5 of 6). . . . . . . . . . . . . . . . . . 536
Figure 259. Internal components (6 of 6). . . . . . . . . . . . . . . . . . 538
Figure 260. Drum/cartridge drive assembly. . . . . . . . . . . . . . . . 540
Figure 261. Delivery drive assembly . . . . . . . . . . . . . . . . . . . . .541
Figure 262. Tray 3 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .542
Figure 263. Tray 2 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .543
Figure 264. Paper pick-up assembly (1 of 3). . . . . . . . . . . . . . .544
Figure 265. Paper pick-up assembly (2 of 3). . . . . . . . . . . . . . .545
Figure 266. Paper pick-up assembly (3 of 3). . . . . . . . . . . . . . .546
Figure 267. Registration frame assembly . . . . . . . . . . . . . . . . . 548
Figure 268. Registration roller assembly . . . . . . . . . . . . . . . . . . 549
Figure 269. Feeder assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 550
Figure 270. Tray 1 pick-up assembly. . . . . . . . . . . . . . . . . . . . . 551
Figure 271. Tray 1 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .552
Figure 272. Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . 553
Figure 273. Delivery cover assembly. . . . . . . . . . . . . . . . . . . . . 554
Figure 274. Transfer belt assembly . . . . . . . . . . . . . . . . . . . . . . 555
Figure 275. Fuser assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . 556
Figure 276. Fuser assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . 557
Figure 277. PCA assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . .559
Figure 278. 2,000-sheet input unit covers and doors . . . . . . . . 560
Figure 279. 2,000-sheet input unit internal components . . . . . .562
Figure 280. Multi-bin mailbox components (1 of 3) . . . . . . . . . . 564
Figure 281. Multi-bin mailbox components (2 of 3) . . . . . . . . . . 566
Figure 282. Multi-bin mailbox components (3 of 3) . . . . . . . . . . 568
EN List of Figures 13
Figure 283. 3,000-sheet stapler/stacker components (1 of 2). .570
Figure 284. 3,000-sheet stapler/stacker components (2 of 2). .572
14 List of Figures EN
List of Tables
Table 1. Features and accessories by printer model . . . . . . . .22
Table 2. Printer performance . . . . . . . . . . . . . . . . . . . . . . . . . .23
Table 3. Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 4. Operating environment specifications. . . . . . . . . . . . . 24
Table 5. Acoustic emissions . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 6. Printer dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 7. Consumable storage specifications . . . . . . . . . . . . . . 26
Table 8. Media capacity and sizes for input trays . . . . . . . . . . .31
Table 9. Media capacity and sizes for th e mu lti- bin ma ilbo x. . .33
Table 10. Printable area specification . . . . . . . . . . . . . . . . . . . . . 34
Table 11. Paper handling accessory status LEDs . . . . . . . . . . . 45
Table 12. Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 13. Technical support websites. . . . . . . . . . . . . . . . . . . . . 62
Table 14. Asia Pacific region Customer Care Centers . . . . . . . . 68
Table 15. Information Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Table 16. Proof and Print Menu . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 17. Quick Copy Jobs Menu. . . . . . . . . . . . . . . . . . . . . . . . 84
Table 18. Proof and Print Menu . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 19. Paper Handling Menu . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 20. Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 21. Printing Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Table 22. I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 23. I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 24. Resets Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 25. Color Adjust Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 26. Service Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 27. Replacement frequencies for printer consumables. . 119
Table 28. Subtractive color absorption . . . . . . . . . . . . . . . . . . . 138
Table 29. Subtractive color mixing . . . . . . . . . . . . . . . . . . . . . . 139
Table 30. Additive color mixing . . . . . . . . . . . . . . . . . . . . . . . . .140
Table 31. Fusing temperatures . . . . . . . . . . . . . . . . . . . . . . . . .166
Table 32. Printer motor and heater names and descriptions . .171
Table 33. Fan operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Table 34. Feed speeds based on media type. . . . . . . . . . . . . . 179
Table 35. Printer sensor names and descrip tions. . . . . . . . . . .185
Table 36. Printer switch names and descriptions . . . . . . . . . . .187
Table 37. Tray 2 and Tray 3 paper-size detection . . . . . . . . . . 188
Table 38. Paper-quantity detection switches . . . . . . . . . . . . . . 202
EN 15
Table 39. Paper-size detection switches. . . . . . . . . . . . . . . . . . 202
Table 40. Multi-bin mailbox sensors, switches, mot ors ,
and controller board PCA . . . . . . . . . . . . . . . . . . . . . 209
Table 41. Numbered printer messages. . . . . . . . . . . . . . . . . . . 368
Table 42. Unnumbered printer messages. . . . . . . . . . . . . . . . .388
Table 43. Sensor monitor test. . . . . . . . . . . . . . . . . . . . . . . . . . 424
Table 44. Media jam detection . . . . . . . . . . . . . . . . . . . . . . . . . 436
Table 45. Neutral axis adjustments. . . . . . . . . . . . . . . . . . . . . . 461
Table 46. Status LED on the 2,000-sheet input unit . . . . . . . . . 470
Table 47. Patterns of LED flashing (2-second pause
between each pattern) . . . . . . . . . . . . . . . . . . . . . . . 472
Table 48. DIP switch settings for troubleshooting test
procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473
Table 49. Status LEDs on the multi-bin mailbox . . . . . . . . . . . .479
Table 50. Service LED flashing patterns. . . . . . . . . . . . . . . . . . 490
Table 51. User LED status interpretation . . . . . . . . . . . . . . . . . 490
Table 52. Operating errors in the stapler/stacker . . . . . . . . . . . 494
Table 53. Open doors in the stapler/stacker . . . . . . . . . . . . . . .495
Table 54. Jams in the stapler/stacker . . . . . . . . . . . . . . . . . . . . 496
Table 55. Hardware malfunctions in the stapler/stacker. . . . . .499
Table 56. Accessories and consumables . . . . . . . . . . . . . . . . . 512
Table 57. Miscellaneous parts . . . . . . . . . . . . . . . . . . . . . . . . . 514
Table 58. Printer covers and doors (1 of 4)—Filler panel
for tray 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 519
Table 59. Printer doors and covers (2 of 4). . . . . . . . . . . . . . . . 521
Table 60. Printer doors and covers (3 of 4). . . . . . . . . . . . . . . . 523
Table 61. Printer covers and doors (4 of 4). . . . . . . . . . . . . . . . 525
Table 62. Internal cover assembly parts . . . . . . . . . . . . . . . . . . 527
Table 63. Internal components parts (1 of 6) . . . . . . . . . . . . . .529
Table 64. Internal components parts (2 of 6) . . . . . . . . . . . . . .531
Table 65. Internal components parts (3 of 6) . . . . . . . . . . . . . .533
Table 66. Internal components parts (4 of 6) . . . . . . . . . . . . . .535
Table 67. Internal components parts (5 of 6) . . . . . . . . . . . . . .537
Table 68. Internal components parts (6 of 6) . . . . . . . . . . . . . .539
Table 69. Drum/cartridge drive assembly parts . . . . . . . . . . . . 540
Table 70. Delivery drive assembly parts . . . . . . . . . . . . . . . . . . 541
Table 71. Tray 3 assembly parts. . . . . . . . . . . . . . . . . . . . . . . . 542
Table 72. Tray 2 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543
Table 73. Paper pick-up assembly parts. . . . . . . . . . . . . . . . . . 547
Table 74. Registration frame assembly parts . . . . . . . . . . . . . . 548
Table 75. Registration roller assembly parts. . . . . . . . . . . . . . .549
Table 76. Feeder assembly parts . . . . . . . . . . . . . . . . . . . . . . . 550
Table 77. Tray 1 pick-up assembly parts . . . . . . . . . . . . . . . . . 551
Table 78. Tray 1 assembly parts. . . . . . . . . . . . . . . . . . . . . . . . 552
16 List of Tables EN
Table 79. Delivery assembly parts . . . . . . . . . . . . . . . . . . . . . . 553
Table 80. Delivery cover assembly parts . . . . . . . . . . . . . . . . .554
Table 81. Transfer belt assembly parts. . . . . . . . . . . . . . . . . . . 555
Table 82. Fuser assembly parts . . . . . . . . . . . . . . . . . . . . . . . . 558
Table 83. PCA assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . 559
Table 84. 2,000-sheet input unit cover and door parts . . . . . . .561
Table 85. 2,000-sheet input unit internal component parts. . . . 563
Table 86. Multi-bin mailbox component parts (1 of 3). . . . . . . .565
Table 87. Multi-bin mailbox component parts (2 of 3). . . . . . . .567
Table 88. Multi-bin mailbox component parts (3 of 3). . . . . . . .569
Table 89. 3,000-sheet stapler/stacker components (1 of 2) . . . 571
Table 90. 3,000-sheet stapler/stacker components (2 of 2) . . . 573
Table 91. Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . 574
Table 92. Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . 587
EN List of Tables 17
18 List of Tables EN
1Product information
Chapter contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 24
Operating environment specifications . . . . . . . . . . . . . 24
Acoustic emission specifications . . . . . . . . . . . . . . . . . 25
Printer dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Consumable storage specifications. . . . . . . . . . . . . . . 26
Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
General guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Media requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Selecting media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Storing media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Media capacity and sizes for input trays . . . . . . . . . . . 31
Media capacity and sizes fo r the multi-bin mailbox . . . 33
Printable area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Media considerations. . . . . . . . . . . . . . . . . . . . . . . . . . 35
Media to avoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Identification (model and serial numbers) . . . . . . . . . . . . . . . 38
EN Chapter contents 19
Printer Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
External views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Formatter assemblies . . . . . . . . . . . . . . . . . . . . . . . . . 43
Media-handling accessories and options . . . . . . . . . . 44
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
FCC regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Canadian DOC regulations . . . . . . . . . . . . . . . . . . . . . 46
Declarations of conformity . . . . . . . . . . . . . . . . . . . . . . 47
VCCI statement (Japan)—8500 models . . . . . . . . . . . 54
VCCI statement (Japan)—8550 models . . . . . . . . . . . 54
EMI statement (Korea)—8500 models . . . . . . . . . . . . 54
EMI statement (Korea)—8550 models . . . . . . . . . . . . 54
Laser safety statement . . . . . . . . . . . . . . . . . . . . . . . . 55
Laser statement for Finland. . . . . . . . . . . . . . . . . . . . . 56
Product information sheet . . . . . . . . . . . . . . . . . . . . . . 57
Toner safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Material Safety Data Sheet (MSDS) . . . . . . . . . . . . . . 57
Ozone safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
20 Chapter 1 - Product information EN
Introduction
This manual covers service topics for the following printers and their
paper-handling optional accessories:
HP Color LaserJet 8500 printer (bas e mo d el)
HP Color LaserJet 8500 N printer
HP Color LaserJet 8500 DN printer
HP Color LaserJet 8550 printer (bas e mo d el)
HP Color LaserJet 8550 N printer
HP Color LaserJet 8550 DN printer
HP Color LaserJet 8550 GN printer
HP Color LaserJet 8550 MFP—print engine only
Note Service topics for the HP Color LaserJet 8550 MFP printer’s copy
module, automatic document f eeder, and 1,000-sh eet input paper deck
are not included in this manual. See the HP Color LaserJet 855 0 MFP
printer service manual for all service information related to these
devices.
EN Introduction 21
Printer features
Table 1. Features and accessories by printer model
Feature/accessory
Standard DIMM
memory (in MB)
Maximum DIMM
memory1 (in MB)
Internal hard disk XX XXXX
HPJetDirect EIO card XX XXXX
Features
500-sheet tray 2 XXX XXXX
2,000-sheet input unit X X X
Duplexer X XXX
Copy module X
External (EIOcompatible) printer
hard disk
DRAM DIMMs
(synchronous)
Duplexer
HP JetDirect EIO card X X
500-sheet input tray X
1,000-sheet paper
deck (input)
Accessories
Automatic document
feeder
2
Model
8500
8500 N8500
DN
8550
8550 N8550 DN8550 GN8550
MFP
32 32 64 32 64 64 128 64
256 256 256 512 512 512 512 512
XX
XXXXXXXX
XX XX
X
X
Multi-bin mailbox
(output)
3,000-sheet stapler/
stacker or 3,000-
XXX
XX
sheet stacker (output)
1
To expand the dual inline memory module (DIMM) memory to 512 MB, install 64-MB DIMMs in all
eight DIMM slots. Optimized memory for all models is 128 MB.
2
Minimum 64 MB memory recommended for automatic duplex printing.
22 Chapter 1 - Product information EN
Table 2. Printer performance
Print speeds
24 pages per minute (ppm) black and white (b/w)
6 ppm color
Text and graphics
resolution
Approximate print
speeds
Letter and A4-size
Legal, Executive,
and 11-by-17 inch size
Heavy paper
Transparencies
Fonts
Printer personality
support
User interface and EIO
600 dots per inch (dpi) resolution
24 ppm b/w; 6 ppm color
12 ppm b/w; 3 ppm color
3.2 ppm b/w; 2.2 ppm color
2.6 ppm b/w; 2.0 ppm color
TrueType™ rasterizer in both HP PCL and Adobe
PostScript
45 scalable HP typefaces
136 scalable Adobe PostScript fonts
Automatic personality switching
PCL and PostScript support
Standard ECP or bidirectional parallel cable interface
®
(IEEE-1284 compliant)
2 enhanced input/output (EIO) slots
Automatic input/output (I/O) switching
The approximate print speeds offered by this printer might vary from
those listed above because the following factors affect processing
time:
complexity and size of graphics
I/O configuration
computer configuration
amount of printer memory
network operating system
network configuration
printer color calibration
EN Printer features 23
Specifications
Electrical specifications
Table 3. Electrical specifications
Item 110-volt models 220-volt models
Power requirements 100 to 127 V (+/- 10%)
50/60 Hz (+/- 2 Hz)
Power consumption (typical):
During printing (b/w)
During printing (color)
During standby
During Power Save mode
During Off mode
Minimum recommended circuit
capacity for typical product
750 W (average)
375 W (average)
190 W (average)
less than 45 W
less than 2 W
12.0 A at 120 V 6.0 A at 220 V
Operating environment specifications
Table 4. Operating environment specifications
Item Operating Storage
Temperature
Recommended
Allowed
Humidity
Recommended
Allowed
20 to 26° C (68 to 79° F)
15 to 30° C (59 to 86° F)
20 to 50% relative humidity (RH)
10 to 80% RH
0 to 35° C (32 to 95° F)
-20 to 60° C (-4 to 140° F)
35 to 85% RH
10 to 95% RH
220 to 240 V (+/- 10%)
50/60 Hz (+/- 2 Hz)
750 W (average)
375 W (average)
190 W (average)
less than 45 W
less than 2 W
Altitude
Allowed 0 to 3,048 meters (0 to 10,000 feet) 0 to 3,048 meters (0 to 10,000 feet)
Note See the HP Color LaserJet 8550 MFP printer service manual for
dimensions that include cop y module, automatic document f eeder, and
1,000-sheet input paper deck.
24 Chapter 1 - Product information EN
Acoustic emission specifications
Table 5. Acoustic emissions
Category 8500 8550
Operation position (per ISO 9296,
DIN 45635, T.19)
Bystander 1 meter (per ISO 7779,
DIN 45635, T.19)
Sound power (per ISO 9296) Printing:
Printing:
Standby:
Printing:
Standby:
Standby:
LpA 54 dB(A)
A 49 dB(A)
L
p
LpA 50 dB(A)
LpA 45 dB(A)
6.8 B (A)
6.3 B (A)
L
A 57 dB(A)
p
A 52 dB(A)
L
p
LpA 54 dB(A)
LpA 47 dB(A)
7.0 B (A)
6.4 B (A)
Printer dimensions
Table 6. Printer dimensions
Printer with 2,000sheet input unit and
multi-bin mailbox or
Category Printer Printer with stand
Height 750 millimeters (mm) (30
inches)
Width 566 mm (22 inches) 566 mm (22 inches) 1056 mm (42 inches)
Depth 625 mm (25 inches) 625 mm (25 inches) 625 mm (25 inches)
Weight (with
consumables)
87 kilograms (kg)
(192 pounds)
1111 mm (44 inches) 1230 mm (48 inches)
100 kg (220 pounds) 118 kg (260 pounds)
stapler/stacker
EN Specifications 25
Consumable storage specifications
The life of consumables is greatly affected by their storage
environment. Use the following table to determine the shelf life of
stored consumables.
For consumable re placement specifications, see page 119.
Table 7. Consumable storage specifications
Temperature
Normal (maximum of 2.5 years)
Severe (maximum of 18 days)
0 to 35° C (32 to 95° F)
High: 35 to 40° C (95 to 104° F)
Low: 0 to -20° C (32 to -4° F)
Maximum temperature change rate
40 to 15° C (104 to 59° F) within 3 minutes
-20 to 25° C (-4 to 77° F) within 3 minutes
Humidity
Normal (maximum of 2.5 years)
Severe (maximum of 18 days)
35 to 85% RH
High: 85 to 95% RH
Low: 10 to 35% RH
Atmospheric pressure
460 to 760 mm mercury (Hg)
26 Chapter 1 - Product information EN
Site requirements
General guidelines
Locating and placing the printer correctly are important in maintaining
the performance level set at the factory. In particular, be sure to
adhere to the environmental specifications listed in t his chapter. The
following are recommendations for locating and placing the printer:
Install in a well-ventilated, dust-free area.
Install on a hard, level surface.
Install where the temperature and humidity do not change
abruptly. Do not install near water sources, humidifiers, air
conditioners, refrigerators, or other major appliances.
Do not expose the printer to direct sunlight, dust, open flames, or
ammonia fumes.
Install the printer awa y f rom wa lls or other ob jects. T here must be
enough space around the printer for proper access and
ventilation (see figure 1 on page 28).
Install the printer away from the direct flow of exhaust from air
ventilation systems.
EN Site requirements 27
Space requirements
Note See the HP Color LaserJet 8550 MFP printer service manual for space
requirements for the copy module, automatic document feeder, and
1,000-sheet input paper deck.
1404 mm
55 in
290 mm
11 in
1
1085 mm
43 in
363 mm
14 in
1230 mm
48 in
2
495 mm
20 in
838 mm
33 in
460 mm
18 in
495 mm
20 in
1230 mm
3
838 mm
33 in
48 in
Figure 1. Space requirements
1 Top view (with an optional 2,000 -sheet input tray and an optional
multi-bin mailbox, 3,000-sheet stapler/stacker, or 3,000-sheet
stacker)
2 Fr on t v iew (with an optional 2,000-sheet input tray and an
optional multi-bin mailbox)
3 Fr on t v iew (with an optional 2,000-sheet input tray and an
optional 3,000-sheet stapler/stacker or 3,000-sheet stacker)
28 Chapter 1 - Product information EN
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