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Hewlett Packard Color Laser Printer Service Manual
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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."
Trademark Credits
CompuServeTM is a U.S. trademark of CompuServe, Inc. MS-DOS® is a U.S. registered trademark of Microsoft Corporation. PhotoshopTM and PostScript® are registered trademarks of Adobe Systems Incorporated. TrueTypeTM is a U.S. trademark of Apple Computer, Inc. UNIX® is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Limited.
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
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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
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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
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Contents 5
6 Contents
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List of Figures
Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36.
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Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . 28 Example of printer model number and serial number label (110 V and 220 V). . . . . . . . . . . . . . . . 38 Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Formatter assemblies . . . . . . . . . . . . . . . . . . . . . . . . 43 Media-handling accessories and options . . . . . . . . . 44 Contents of printer box . . . . . . . . . . . . . . . . . . . . . . . 73 Power cord connection . . . . . . . . . . . . . . . . . . . . . . . 74 C-link and power cables connections . . . . . . . . . . . . 75 Network connections . . . . . . . . . . . . . . . . . . . . . . . . 76 Parallel cable connection . . . . . . . . . . . . . . . . . . . . . 78 Changing the printer control panel overlay . . . . . . . . 79 Location of printer control panel features . . . . . . . . . 80 Consumables installation . . . . . . . . . . . . . . . . . . . . . 98 DIMM slot configuration . . . . . . . . . . . . . . . . . . . . . 106 Duplex registration . . . . . . . . . . . . . . . . . . . . . . . . . 107 Removing the toner catch tray cover . . . . . . . . . . . 116 Cleaning the toner catch tray . . . . . . . . . . . . . . . . . 117 Location of consumables in printer . . . . . . . . . . . . . 118 Contents of transfer kit . . . . . . . . . . . . . . . . . . . . . . 120 Contents of drum kit . . . . . . . . . . . . . . . . . . . . . . . . 124 Contents of fuser kit . . . . . . . . . . . . . . . . . . . . . . . . 127 Cross-section view of internal components . . . . . . 136 Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Electrostatic latent image formation block . . . . . . . 142 Preconditioning exposure . . . . . . . . . . . . . . . . . . . . 143 Primary charging of imaging drum . . . . . . . . . . . . . 144 Black toner cartridge (left) and color toner cartridge (right) development . . . . . . . . . . . . . . . . . 145 Primary transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Post charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Secondary transfer . . . . . . . . . . . . . . . . . . . . . . . . . 148 Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Cleaning roller charging . . . . . . . . . . . . . . . . . . . . . 150 Transfer drum cleaning. . . . . . . . . . . . . . . . . . . . . . 151 Imaging drum cleaning block . . . . . . . . . . . . . . . . . 152 Fusing the toner . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 7
Figure 37. Figure 38. Figure 39. Figure 40. Figure 41. Figure 42. Figure 43. Figure 44. Figure 45. Figure 46. Figure 47. Figure 48. Figure 49. Figure 50. Figure 51. Figure 52. Figure 53. Figure 54. Figure 55. Figure 56. Figure 57. Figure 58. Figure 59. Figure 60. Figure 61. Figure 62. Figure 63. Figure 64. Figure 65. Figure 66. Figure 67. Figure 68. Figure 69. Figure 70. Figure 71. Figure 72. Figure 73. Figure 74.
Waste toner level detection . . . . . . . . . . . . . . . . . . 155 Color toner level detection . . . . . . . . . . . . . . . . . . . 157 Color toner lever detection . . . . . . . . . . . . . . . . . . . 158 Density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Transfer belt control . . . . . . . . . . . . . . . . . . . . . . . . 161 Cleaning roller control. . . . . . . . . . . . . . . . . . . . . . . 162 Carousel control . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 Power distribution circuit diagram. . . . . . . . . . . . . . 164 Power Save circuit diagram . . . . . . . . . . . . . . . . . . 165 High-voltage power supply circuit . . . . . . . . . . . . . . 168 Laser/scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Printer motors and heaters . . . . . . . . . . . . . . . . . . . 171 Carousel motor (M1). . . . . . . . . . . . . . . . . . . . . . . . 172 Drum motor (M2) . . . . . . . . . . . . . . . . . . . . . . . . . . 173 Cartridge motor (M3) . . . . . . . . . . . . . . . . . . . . . . . 174 Main motor (M4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 Pick-up motor (M5) . . . . . . . . . . . . . . . . . . . . . . . . . 176 Paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Tray 2 and 3 pick-up . . . . . . . . . . . . . . . . . . . . . . . . 181 Tray 1 pick-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Printer sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Printer switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 Printer clutches and solenoids . . . . . . . . . . . . . . . . 189 Fusing and delivery unit . . . . . . . . . . . . . . . . . . . . . 191 Timing chart for WAIT period (1 of 2) . . . . . . . . . . . 193 Timing chart for WAIT period (2 of 2) . . . . . . . . . . . 194 Timing chart, printing full-color letter-sized page (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Timing chart, printing full-color letter-sized page (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 Timing chart, printing full-color 11-by-17-inch page (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197 Timing chart, printing full-color 11-by-17 inch page (2 of 2) 198 2,000-sheet input unit sensors, switches, clutches, and motors . . . . . . . . . . . . . . . . . . . . . . . 200 2,000-sheet input unit paper path . . . . . . . . . . . . . . 204 Multi-bin mailbox cabling . . . . . . . . . . . . . . . . . . . . 207 Multi-bin mailbox sensors . . . . . . . . . . . . . . . . . . . . 208 Multi-bin mailbox paper path . . . . . . . . . . . . . . . . . 210 C-link cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 Stapler/stacker paper path and sensors . . . . . . . . . 215 Stacker paper path and sensors. . . . . . . . . . . . . . . 216
8 List of Figures
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Figure 75. Figure 76. Figure 77. Figure 78. Figure 79. Figure 80. Figure 81. Figure 82. Figure 83. Figure 84. Figure 85. Figure 86. Figure 87. Figure 88. Figure 89. Figure 90. Figure 91. Figure 92. Figure 93. Figure 94. Figure 95. Figure 96. Figure 97. Figure 98. Figure 99. Figure 100. Figure 101. Figure 102. Figure 103. Figure 104. Figure 105. Figure 106. Figure 107. Figure 108. Figure 109. Figure 110. Figure 111. Figure 112. Figure 113. Figure 114. Figure 115.
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Orientation of printer and accessories: top, front, and right . . . . . . . . . . . . . . . . . . . . . . . . . 225 Orientation of printer and accessories: rear and left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226 Attachment bracket, HP Color LaserJet 8550 MFP printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Locking pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Removing the front cover . . . . . . . . . . . . . . . . . . . . 228 Front right cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 229 Inside left panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 Filler panel for tray 2 . . . . . . . . . . . . . . . . . . . . . . . . 231 Screws behind left door . . . . . . . . . . . . . . . . . . . . . 232 Screws behind right door . . . . . . . . . . . . . . . . . . . . 232 Connector on top cover . . . . . . . . . . . . . . . . . . . . . 233 Left door and strap . . . . . . . . . . . . . . . . . . . . . . . . . 234 Screws on left rear cover . . . . . . . . . . . . . . . . . . . . 235 Screws on upper left door. . . . . . . . . . . . . . . . . . . . 236 Stopper hinges on lower left cover . . . . . . . . . . . . . 237 Connectors on the right upper door . . . . . . . . . . . . 238 E-ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239 Spring on right cover subassembly . . . . . . . . . . . . 240 Right rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Screws on the right lower cover . . . . . . . . . . . . . . . 242 Plate, HP Color LaserJet 8550 MFP printer . . . . . . 243 Rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244 Bottom of the control panel. . . . . . . . . . . . . . . . . . . 246 Laser/scanner shield . . . . . . . . . . . . . . . . . . . . . . . 247 Scanner unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248 Upper airflow vent. . . . . . . . . . . . . . . . . . . . . . . . . . 249 Face-down exit sensor rail . . . . . . . . . . . . . . . . . . . 249 Face-down output assembly. . . . . . . . . . . . . . . . . . 250 Toner lock sensor and color cartridge sensor . . . . 251 Subrelay PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252 Formatter board . . . . . . . . . . . . . . . . . . . . . . . . . . . 254 Connector on formatter board . . . . . . . . . . . . . . . . 256 Back side of formatter board . . . . . . . . . . . . . . . . . 256 Feeder assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 257 Face-up solenoid (1 of 2) . . . . . . . . . . . . . . . . . . . . 258 Face-up solenoid (2 of 2) . . . . . . . . . . . . . . . . . . . . 259 Screws on the face-up exit assembly . . . . . . . . . . . 260 Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261 Pick-up roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 Registration roller assembly (front). . . . . . . . . . . . . 263 Registration roller assembly (back) . . . . . . . . . . . . 264 List of Figures 9
Figure 116. Figure 117. Figure 118. Figure 119. Figure 120. Figure 121. Figure 122. Figure 123. Figure 124. Figure 125. Figure 126. Figure 127. Figure 128. Figure 129. Figure 130. Figure 131. Figure 132. Figure 133. Figure 134. Figure 135. Figure 136. Figure 137. Figure 138. Figure 139. Figure 140. Figure 141. Figure 142. Figure 143. Figure 144. Figure 145. Figure 146. Figure 147. Figure 148. Figure 149. Figure 150. Figure 151. Figure 152. Figure 153. Figure 154. Figure 155. Figure 156. Figure 157. 10 List of Figures
Connectors on registration roller assembly . . . . . . 265 Density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266 Paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . 267 Tray 1 pick-up assembly (1 of 2) . . . . . . . . . . . . . . 268 Tray 1 pick-up assembly (2 of 2) . . . . . . . . . . . . . . 269 Rear of printer with cover removed . . . . . . . . . . . . 270 Rear of printer with formatter pan removed . . . . . . 271 Formatter pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 Formatter pan (left side) . . . . . . . . . . . . . . . . . . . . . 273 Fan 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274 Fan 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276 Controller board, HP Color LaserJet 8550 MFP printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277 Controller board, HP Color LaserJet 8500 printer . 278 ECO board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279 Cartridge motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 Main motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281 Carousel motor PCA. . . . . . . . . . . . . . . . . . . . . . . . 282 Fans 1 and 2 housing assemblies . . . . . . . . . . . . . 283 Carousel motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 Lower air duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285 Screws on the delivery drive assembly . . . . . . . . . 286 Access to main gear assembly . . . . . . . . . . . . . . . . 287 Developer/imaging drum bias supply, HP Color LaserJet 8550 printer . . . . . . . . . . . . . . . 288 Developer/imaging drum bias supply . . . . . . . . . . . 289 Post charger HV module . . . . . . . . . . . . . . . . . . . . 290 High-voltage power supply . . . . . . . . . . . . . . . . . . . 291 Cleaning roller HV module . . . . . . . . . . . . . . . . . . . 292 Main relay PCA. . . . . . . . . . . . . . . . . . . . . . . . . . . . 293 Drum/cartridge drive assembly . . . . . . . . . . . . . . . . 294 Separation discharge high-voltage converter . . . . . 295 Plate over media size sensing PCAs . . . . . . . . . . . 296 Media size sensing PCAs . . . . . . . . . . . . . . . . . . . . 297 Front cover of the 2,000-sheet input unit . . . . . . . . 299 Back cover removal . . . . . . . . . . . . . . . . . . . . . . . . 300 Left cover removal . . . . . . . . . . . . . . . . . . . . . . . . . 301 Vertical transfer unit . . . . . . . . . . . . . . . . . . . . . . . . 302 Right cover with VTU removed . . . . . . . . . . . . . . . . 304 Tray 4 removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 Paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . 306 Controller PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 Screw on front LED PCA assembly . . . . . . . . . . . . 308
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Figure 158. Figure 159. Figure 160. Figure 161. Figure 162. Figure 163. Figure 164. Figure 165. Figure 166. Figure 167. Figure 168. Figure 169. Figure 170. Figure 171. Figure 172. Figure 173. Figure 174. Figure 175. Figure 176. Figure 177. Figure 178. Figure 179. Figure 180. Figure 181. Figure 182. Figure 183. Figure 184. Figure 185. Figure 186. Figure 187. Figure 188. Figure 189. Figure 190. Figure 191. Figure 192. Figure 193. Figure 194. Figure 195. Figure 196. Figure 197. Figure 198. Figure 199.
Front LED PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309 Main drive assembly . . . . . . . . . . . . . . . . . . . . . . . . 310 Paper quantity switch assembly . . . . . . . . . . . . . . . 311 Paper size switch assembly . . . . . . . . . . . . . . . . . . 312 Tension springs . . . . . . . . . . . . . . . . . . . . . . . . . . . 313 Front and back covers . . . . . . . . . . . . . . . . . . . . . . 315 Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317 Paper bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318 Flipper assembly (1 of 3) . . . . . . . . . . . . . . . . . . . . 319 Flipper assembly (2 of 3) . . . . . . . . . . . . . . . . . . . . 319 Flipper assembly (3 of 3) . . . . . . . . . . . . . . . . . . . . 320 Delivery head motor . . . . . . . . . . . . . . . . . . . . . . . . 321 Transport belt motor . . . . . . . . . . . . . . . . . . . . . . . . 322 Input paper guide (1 of 2) . . . . . . . . . . . . . . . . . . . . 323 Input paper guide (2 of 2) . . . . . . . . . . . . . . . . . . . . 324 Metallic tape and housing assembly (1 of 2) . . . . . 325 Metallic tape and housing assembly (2 of 2) . . . . . 326 Controller PCA (1 of 2) . . . . . . . . . . . . . . . . . . . . . . 327 Controller PCA (2 of 2) . . . . . . . . . . . . . . . . . . . . . . 328 Anti-curl strings (1 of 2) . . . . . . . . . . . . . . . . . . . . . 329 Anti-curl strings (2 of 2) . . . . . . . . . . . . . . . . . . . . . 330 Delivery head assembly (1 of 4) . . . . . . . . . . . . . . . 331 Delivery head assembly (2 of 4) . . . . . . . . . . . . . . . 332 Delivery head assembly (3 of 4) . . . . . . . . . . . . . . . 332 Delivery head assembly (4 of 4) . . . . . . . . . . . . . . . 333 Interlock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334 Diagnostic LED PCA . . . . . . . . . . . . . . . . . . . . . . . 335 User status LED PCA . . . . . . . . . . . . . . . . . . . . . . . 336 Attachment assembly . . . . . . . . . . . . . . . . . . . . . . . 337 Bins removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 Front and back covers removal . . . . . . . . . . . . . . . 340 Foot cover removal . . . . . . . . . . . . . . . . . . . . . . . . . 341 Stapler door assembly and controller PCA cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 Flipper assembly removal (1 of 2) . . . . . . . . . . . . . 343 Flipper assembly removal (2 of 2) . . . . . . . . . . . . . 344 Carriage assembly removal (1 of 2) . . . . . . . . . . . . 345 Carriage assembly removal (2 of 2) . . . . . . . . . . . . 346 Accumulator assembly removal (1 of 2) . . . . . . . . . 347 Accumulator assembly removal (2 of 2) . . . . . . . . . 348 Offset module removal . . . . . . . . . . . . . . . . . . . . . . 349
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List of Figures 11
Figure 200. Figure 201. Figure 202. Figure 203. Figure 204. Figure 205. Figure 206. Figure 207. Figure 208. Figure 209. Figure 210. Figure 211. Figure 212. Figure 213. Figure 214. Figure 215. Figure 216. Figure 217. Figure 218. Figure 219. Figure 220. Figure 221. Figure 222. Figure 223. Figure 224. Figure 225. Figure 226. Figure 227. Figure 228. Figure 229. Figure 230. Figure 231. Figure 232. Figure 233. Figure 234. Figure 235. Figure 236. Figure 237. Figure 238. Figure 239. Figure 240. 12 List of Figures
Stapler removal (1 of 3) . . . . . . . . . . . . . . . . . . . . . 350 Stapler removal (2 of 3) . . . . . . . . . . . . . . . . . . . . . 351 Stapler removal (3 of 3) . . . . . . . . . . . . . . . . . . . . . 352 Stapler/stacker controller PCA or stacker controller PCA removal . . . . . . . . . . . . . . . 353 LED PCA removal . . . . . . . . . . . . . . . . . . . . . . . . . 354 Power supply removal . . . . . . . . . . . . . . . . . . . . . . 355 Interlock switch removal . . . . . . . . . . . . . . . . . . . . . 356 Safety switch assembly removal . . . . . . . . . . . . . . 357 Attachment assembly removal . . . . . . . . . . . . . . . . 358 Flipper ribbon cable removal . . . . . . . . . . . . . . . . . 359 Stationary caster removal . . . . . . . . . . . . . . . . . . . . 360 Adjustable caster removal . . . . . . . . . . . . . . . . . . . 361 Example of an HP Color LaserJet 8500 printer configuration page . . . . . . . . . . . . . . . . . . . . . . . . . 417 Example of an HP Color LaserJet 8550 printer configuration page . . . . . . . . . . . . . . . . . . . . . . . . . 417 Right upper cover detection interlock . . . . . . . . . . . 425 Drum cartridge detection interlock . . . . . . . . . . . . . 425 Black toner cartridge detection interlock. . . . . . . . . 426 Toner carousel door detection interlock . . . . . . . . . 426 Front cover/delivery cover detection interlocks . . . 427 Laser shutters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428 Left upper cover detection . . . . . . . . . . . . . . . . . . . 429 Right lower cover detection . . . . . . . . . . . . . . . . . . 429 Printer paper path . . . . . . . . . . . . . . . . . . . . . . . . . . 435 Image orientation and direction of travel . . . . . . . . 442 Color-plane registration . . . . . . . . . . . . . . . . . . . . . 443 Developer streak . . . . . . . . . . . . . . . . . . . . . . . . . . 444 Rain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445 Toner bubbles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446 Charge roller set . . . . . . . . . . . . . . . . . . . . . . . . . . . 447 Waves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448 Missing toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449 Hot offset (glossy paper or transparency) . . . . . . . 450 Fading resulting from broken transfer guide . . . . . . 451 Color adjust page . . . . . . . . . . . . . . . . . . . . . . . . . . 458 Repetitive defect ruler. . . . . . . . . . . . . . . . . . . . . . . 463 Cleaning the transfer drum . . . . . . . . . . . . . . . . . . . 466 Rear view of 2,000-sheet input unit . . . . . . . . . . . . 471 Location of sensors in the 2,000-sheet input unit . . 475 Multi-bin mailbox power supply test mode switch. . 477 Staple position . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483 Device timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485
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Figure 241. Figure 242. Figure 243. Figure 244. Figure 245. Figure 246. Figure 247. Figure 248. Figure 249. Figure 250. Figure 251. Figure 252. Figure 253. Figure 254. Figure 255. Figure 256. Figure 257. Figure 258. Figure 259. Figure 260. Figure 261. Figure 262. Figure 263. Figure 264. Figure 265. Figure 266. Figure 267. Figure 268. Figure 269. Figure 270. Figure 271. Figure 272. Figure 273. Figure 274. Figure 275. Figure 276. Figure 277. Figure 278. Figure 279. Figure 280. Figure 281. Figure 282.
Error format for paper handling . . . . . . . . . . . . . . . 493 Connectors on the controller board . . . . . . . . . . . . 503 General printer circuit diagram (1 of 4) . . . . . . . . . . 504 General printer circuit diagram (2 of 4) . . . . . . . . . . 505 General printer circuit diagram (3 of 4) . . . . . . . . . . 506 General printer circuit diagram (4 of 4) . . . . . . . . . . 507 Major assembly locations (1 of 2) . . . . . . . . . . . . . . 517 Major assembly locations (2 of 2) . . . . . . . . . . . . . . 518 Printer covers and doors (1 of 4)--Filler panel for tray 2 (HP Color LaserJet 8550 base model only) . 519 Printer covers and doors (2 of 4) . . . . . . . . . . . . . . 520 Printer covers and doors (3 of 4) . . . . . . . . . . . . . . 522 Printer covers and doors (4 of 4) . . . . . . . . . . . . . . 524 Internal cover assembly . . . . . . . . . . . . . . . . . . . . . 526 Internal components (1 of 6). . . . . . . . . . . . . . . . . . 528 Internal components (2 of 6). . . . . . . . . . . . . . . . . . 530 Internal components (3 of 6). . . . . . . . . . . . . . . . . . 532 Internal components (4 of 6). . . . . . . . . . . . . . . . . . 534 Internal components (5 of 6). . . . . . . . . . . . . . . . . . 536 Internal components (6 of 6). . . . . . . . . . . . . . . . . . 538 Drum/cartridge drive assembly . . . . . . . . . . . . . . . . 540 Delivery drive assembly . . . . . . . . . . . . . . . . . . . . . 541 Tray 3 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 542 Tray 2 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 543 Paper pick-up assembly (1 of 3) . . . . . . . . . . . . . . . 544 Paper pick-up assembly (2 of 3) . . . . . . . . . . . . . . . 545 Paper pick-up assembly (3 of 3) . . . . . . . . . . . . . . . 546 Registration frame assembly . . . . . . . . . . . . . . . . . 548 Registration roller assembly . . . . . . . . . . . . . . . . . . 549 Feeder assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 550 Tray 1 pick-up assembly. . . . . . . . . . . . . . . . . . . . . 551 Tray 1 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 552 Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . 553 Delivery cover assembly. . . . . . . . . . . . . . . . . . . . . 554 Transfer belt assembly . . . . . . . . . . . . . . . . . . . . . . 555 Fuser assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . 556 Fuser assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . 557 PCA assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . 559 2,000-sheet input unit covers and doors . . . . . . . . 560 2,000-sheet input unit internal components . . . . . . 562 Multi-bin mailbox components (1 of 3) . . . . . . . . . . 564 Multi-bin mailbox components (2 of 3) . . . . . . . . . . 566 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. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Table 25. Table 26. Table 27. Table 28. Table 29. Table 30. Table 31. Table 32. Table 33. Table 34. Table 35. Table 36. Table 37. Table 38.
EN
Features and accessories by printer model . . . . . . . . 22 Printer performance . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 24 Operating environment specifications . . . . . . . . . . . . . 24 Acoustic emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Printer dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Consumable storage specifications . . . . . . . . . . . . . . 26 Media capacity and sizes for input trays . . . . . . . . . . . 31 Media capacity and sizes for the multi-bin mailbox . . . 33 Printable area specification . . . . . . . . . . . . . . . . . . . . . 34 Paper handling accessory status LEDs . . . . . . . . . . . 45 Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Technical support websites . . . . . . . . . . . . . . . . . . . . . 62 Asia Pacific region Customer Care Centers . . . . . . . . 68 Information Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Proof and Print Menu . . . . . . . . . . . . . . . . . . . . . . . . . 84 Quick Copy Jobs Menu . . . . . . . . . . . . . . . . . . . . . . . . 84 Proof and Print Menu . . . . . . . . . . . . . . . . . . . . . . . . . 85 Paper Handling Menu . . . . . . . . . . . . . . . . . . . . . . . . . 85 Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Printing Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Resets Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Color Adjust Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Service Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Replacement frequencies for printer consumables . . 119 Subtractive color absorption . . . . . . . . . . . . . . . . . . . 138 Subtractive color mixing . . . . . . . . . . . . . . . . . . . . . . 139 Additive color mixing . . . . . . . . . . . . . . . . . . . . . . . . . 140 Fusing temperatures . . . . . . . . . . . . . . . . . . . . . . . . . 166 Printer motor and heater names and descriptions . . 171 Fan operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 Feed speeds based on media type . . . . . . . . . . . . . . 179 Printer sensor names and descriptions . . . . . . . . . . . 185 Printer switch names and descriptions . . . . . . . . . . . 187 Tray 2 and Tray 3 paper-size detection . . . . . . . . . . 188 Paper-quantity detection switches . . . . . . . . . . . . . . 202 15
Table 39. Paper-size detection switches. . . . . . . . . . . . . . . . . . 202 Table 40. Multi-bin mailbox sensors, switches, motors, 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
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Table 79. Table 80. Table 81. Table 82. Table 83. Table 84. Table 85. Table 86. Table 87. Table 88. Table 89. Table 90. Table 91. Table 92.
Delivery assembly parts . . . . . . . . . . . . . . . . . . . . . . 553 Delivery cover assembly parts . . . . . . . . . . . . . . . . . 554 Transfer belt assembly parts . . . . . . . . . . . . . . . . . . . 555 Fuser assembly parts . . . . . . . . . . . . . . . . . . . . . . . . 558 PCA assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . 559 2,000-sheet input unit cover and door parts . . . . . . . 561 2,000-sheet input unit internal component parts . . . . 563 Multi-bin mailbox component parts (1 of 3) . . . . . . . . 565 Multi-bin mailbox component parts (2 of 3) . . . . . . . . 567 Multi-bin mailbox component parts (3 of 3) . . . . . . . . 569 3,000-sheet stapler/stacker components (1 of 2) . . . 571 3,000-sheet stapler/stacker components (2 of 2) . . . 573 Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . 574 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . 587
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List of Tables 17
18 List of Tables
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1
Product 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 for the multi-bin mailbox . . . 33 Printable area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Media considerations. . . . . . . . . . . . . . . . . . . . . . . . . . 35 Media to avoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Identification (model and serial numbers) . . . . . . . . . . . . . . . 38
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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
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Introduction
This manual covers service topics for the following printers and their paper-handling optional accessories: HP Color LaserJet 8500 printer (base model) HP Color LaserJet 8500 N printer HP Color LaserJet 8500 DN printer HP Color LaserJet 8550 printer (base model) 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
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Service topics for the HP Color LaserJet 8550 MFP printer's copy module, automatic document feeder, and 1,000-sheet input paper deck are not included in this manual. See the HP Color LaserJet 8550 MFP printer service manual for all service information related to these devices.
Introduction 21
Printer features
Table 1. Features and accessories by printer model Model Feature/accessory
Standard DIMM memory (in MB) Maximum DIMM memory1 (in MB) Internal hard disk HP JetDirect EIO card 500-sheet tray 2 2,000-sheet input unit Duplexer Copy module External (EIOcompatible) printer hard disk DRAM DIMMs (synchronous) Duplexer2 HP JetDirect EIO card 500-sheet input tray 1,000-sheet paper deck (input) Automatic document feeder Multi-bin mailbox (output) 3,000-sheet stapler/ stacker or 3,000sheet stacker (output) X X X X X X 8500 32 256 8500 N 32 256 X X X 8500 DN 64 256 X X X X X 8550 32 512 8550 N 64 512 X X X 8550 DN 64 512 X X X X X 8550 GN 128 512 X X X X X X X 8550 MFP 64 512 X X X
Features
Accessories
22 Chapter 1 - Product information
1
X X X
X X
X
X X X X
X X
X
X
X
X X
X
X
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.
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Table 2. Printer performance
Approximate print speeds
Legal, Executive, and 11-by-17 inch size Heavy paper Transparencies
Fonts
Printer personality support User interface and EIO
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
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Letter and A4-size
Text and graphics resolution
Print speeds
24 pages per minute (ppm) black and white (b/w) 6 ppm color 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 TrueTypeTM 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
Printer features 23
Specifications
Electrical specifications
Table 3. Electrical specifications Item
Power requirements 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
110-volt models
100 to 127 V (+/- 10%) 50/60 Hz (+/- 2 Hz) 750 W (average) 375 W (average) 190 W (average) less than 45 W less than 2 W 12.0 A at 120 V
220-volt models
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 6.0 A at 220 V
Operating environment specifications
Table 4. Operating environment specifications Item
Temperature Recommended Allowed Humidity Recommended Allowed Altitude Allowed
Operating
20 to 26° C (68 to 79° F) 15 to 30° C (59 to 86° F)
Storage
0 to 35° C (32 to 95° F) -20 to 60° C (-4 to 140° F)
20 to 50% relative humidity (RH) 10 to 80% RH
35 to 85% RH 10 to 95% RH
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 copy module, automatic document feeder, and 1,000-sheet input paper deck.
24 Chapter 1 - Product information
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Acoustic emission specifications
Table 5. Acoustic emissions Category
Operation position (per ISO 9296, DIN 45635, T.19) Bystander 1 meter (per ISO 7779, DIN 45635, T.19) Sound power (per ISO 9296)
8500
Printing: LpA 54 dB(A) Standby: LpA 49 dB(A) Printing: LpA 50 dB(A) Standby: LpA 45 dB(A) Printing: 6.8 B (A) Standby: 6.3 B (A)
8550
LpA 57 dB(A) LpA 52 dB(A) 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 stapler/stacker
1230 mm (48 inches) 1056 mm (42 inches) 625 mm (25 inches) 118 kg (260 pounds)
Category
Height Width Depth Weight (with consumables)
Printer
Printer with stand
750 millimeters (mm) (30 1111 mm (44 inches) inches) 566 mm (22 inches) 625 mm (25 inches) 87 kilograms (kg) (192 pounds) 566 mm (22 inches) 625 mm (25 inches) 100 kg (220 pounds)
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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 replacement 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
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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 this 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 away from walls or other objects. There 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 460 mm 18 in
363 mm 14 in
495 mm 20 in
2
838 mm 33 in
1230 mm 48 in
495 mm 20 in
3
838 mm 33 in
1230 mm 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) Front view (with an optional 2,000-sheet input tray and an optional multi-bin mailbox) Front view (with an optional 2,000-sheet input tray and an optional 3,000-sheet stapler/stacker or 3,000-sheet stacker)
2 3
28 Chapter 1 - Product information
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Media requirements
Selecting media
Many types of paper and other print media can be used with the printer, within certain specifications. CAUTION Using media that do not meet the specifications outlined in this chapter can increase the incidence of media jams, contribute to repair and maintenance costs, and cause premature wear, print quality problems, and problems requiring service. This service might not be covered by the HP warranty or service agreements. Before purchasing media or specialized forms, test a small quantity in the printer. Make sure your media supplier obtains and understands the media specifications in the HP LaserJet Printer Family Paper Specification Guide. For ordering information, see page 514. Note It is possible that media could meet all of the specifications in this chapter and still not print satisfactorily. This might be caused by abnormal characteristics of the printing environment, such as extremes in temperature and humidity.
For complete media specifications, see the HP LaserJet Printer Family Paper Specification Guide. Use only print media that meet the specifications outlined in this chapter. Do not try to print unsupported sizes or weights of media or other unsupported media. Always handle transparencies and glossy media by their edges to avoid fingerprints in the image area. Adhesives on any media must be compatible with the printer's fusing temperatures (approximately 190° C, or 374° F). Do not use media that have already passed through the printer or through a copy machine (even if there is no printing on the page), unless you use the "manual print second side" feature. Recycled media can be used with this printer. Recycled media must meet the specifications described in this chapter.
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Media requirements 29
Storing media
Follow these guidelines when stacking and storing media: Leave media in the wrapper until you are ready to use it. Rewrap partially used packages of media before storing. Stack cartons upright and squarely on top of each other. Store envelopes in a protective box to avoid damaging the envelope edges. Keep stored media away from temperature and humidity extremes. Do not store cartons or reams directly on the floor where they will absorb humidity. Instead, place cartons on a pallet or on shelves. Do not store individual reams in any manner that causes them to curl or warp along the edges. Do not stack more than six cartons on top of each other. Do not place anything on top of media (except for stacking cartons of media), regardless of whether the media is packaged or unpackaged.
When storing printed documents: Do not store printed documents in vinyl folders. Do not expose printed documents to petroleum-based solvents.
30 Chapter 1 - Product information
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Media capacity and sizes for input trays
The following table lists the types and sizes of media supported by each input tray. For best results, use HP LaserJet paper or conventional white copier paper. The media should be of good quality and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, perforations, and curled or bent edges. For a complete list of media specifications, see the HP LaserJet Printer Family Paper Specification Guide. Table 8. Media capacity and sizes for input trays Tray Media type
Paper Plain Preprinted Letterhead Prepunched Bond Recycled Color Card stock Heavy (more than 28 lb, 105 g/m2) Glossy
Media size and orientation
Media weight
Maximum capacity
100 sheets of 20 lb (75 g/m2) bond Limit to media-fill mark on the media width guides.
Tray 1
11 by 17 inch (portrait) 16 to 58 lb (60 to 216 grams per JIS B4 (portrait) square meter [g/m2]) A3 (portrait)* A4 (portrait) bond A5 (portrait) Custom minimum (99 by 190 mm, 3.90 by 7.49 in) (portrait) Custom maximum (304 by 469 mm, 12 by 18.5 inch) (portrait) Executive (portrait) ISO B5 (portrait) JIS B4 (portrait) JIS B5 (portrait) Letter (landscape) Legal (landscape) B5 (portrait) C5 (portrait) Commercial #10 (Com10) (portrait) DL (portrait) Double Post Card (JPOSTD) Monarch (portrait) A4 (landscape) Letter (landscape) A4 (landscape) Letter (landscape) Maximum 24 lb (90 g/m2) bond
Envelopes
Approximately 10 Limit to media-fill mark on the media width guides.
Labels
--
Limit to media-fill mark on the media width guides. Limit to media-fill mark on the media width guides.
Transparencies
5 mils (0.13 mm) thick
*A3 full-bleed is not supported by any of the HP CLJ 8500 or 8550 models.
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Media requirements 31
Table 8. Media capacity and sizes for input trays (continued) Tray Media type
Paper Plain Preprinted Letterhead Prepunched Bond Recycled Color Glossy Transparency
Media size and orientation
A4 (landscape) JIS B4 (portrait) Letter (landscape) Legal (portrait)
Media weight
16 to 28 lb (60 to 105 g/m2) bond
Maximum capacity
500 sheets of 20 lb (75 g/m2) bond Limit to media-fill mark on the media width guides.
Tray 2
A4 (portrait) Letter (portrait) 11 by 17 in (portrait) A3 (portrait)* A4 (landscape) JIS B4 (portrait) Legal (portrait) Letter (landscape)
5 mils (0.13 mm) thick
Limit to media-fill mark on the media width guides. 500 sheets of 20 lb (75 g/m2) bond Limit to media-fill mark on the media width guides.
Paper Plain Preprinted Letterhead Prepunched Bond Recycled Color Glossy Transparency
16 to 28 lb (60 to 105 g/m2) bond
Tray 3
A4 (portrait) Letter (portrait) 11 by 17 in (portrait) A4 (landscape) JIS B4 (portrait) Legal (portrait) Letter (landscape)
5 mils (0.13 mm) thick
Limit to media-fill mark on the media width guides. 2,000 sheets of 20 lb (75 g/m2) bond Limit to media-fill mark on the media width guides.
2,000-sheet input tray
Paper Plain Preprinted Letterhead Prepunched Bond Recycled Color Glossy
16 to 28 lb (60 to 105 g/m2) bond
*A3 full-bleed is not supported by any of the HP CLJ 8500 or 8550 models.
32 Chapter 1 - Product information
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Media capacity and sizes for the multi-bin mailbox
The following table lists the types and sizes of media supported by multi-bin mailbox output bins. Table 9. Media capacity and sizes for the multi-bin mailbox Bins Media type
Paper Plain Preprinted Letterhead Prepunched Bond Recycled Color Paper Plain Preprinted Letterhead Prepunched Bond Recycled Color Card Stock Heavy (more than 28 lb, 105 g/m2) Glossy
Media size
11 by 17 in A3* A4 JIS B4 Legal Letter
Media weight
Maximum capacity
Mailboxes
16 to 28 lb 250 sheets of 20 lb (60 to 105 g/m2) bond (75 g/m2) bond
Left (face-up) output bin
16 to 58 lb 11 by 17 in 125 sheets of 20 lb (60 to 216 g/m2) bond A3* (75 g/m2) bond A4 A5 Custom minimum (99 by 190 mm, 3.90 by 7.49 inch) Custom maximum (304 by 469 mm, 11.98 by 18.48 inch) Executive JIS B4 JIS B5 Legal Letter A4 Letter A4 Letter B5 C5 Commercial #10 (Com10) DL Double Post Card (JPOSTD) Monarch -- 5 mils (0.13 mm) thick Maximum 24 lb (90 g/ m2) bond -- -- 30 Monarch-sized envelopes
Labels Transparency Envelopes
*A3 full-bleed is not supported by any of the HP CLJ 8500 or 8550 models.
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Media requirements 33
Printable area
Print areas shown in the table below are defined as follows: Non-masked area--the maximum area in which image signals are not masked by the compulsory formation of blank image area (this is the maximum area that can be addressed by the laser beam). Recommended print area--the maximum area in which image signals can be printed on media without any loss of image signals, excluding manual feed. Image assurance area--the maximum area in which print quality can be assured, including manual feed.
Table 10. Printable area specification Margin Media type
Non-masked print area Cut sheet Top Bottom Left Right
Envelope
Recommended print area Cut sheet
Envelope
Image assurance area Cut sheet
Envelope
34 Chapter 1 - Product information
2.1 mm (0.083 inch) 2.1 mm (0.083 inch)
2.9 mm (0.114 inch) 2.6 mm (0.102 inch)
3.2 mm (0.126 inch) 3.3 mm (0.130 inch)
3.7 mm (0.146 inch) 3.5 mm (0.138 inch)
3.0 mm (0.118 inch) 8.0 mm (0.315 inch)
6.0 mm (0.236 inch) 10.5 mm (0.413 inch)
4.0 mm (0.157 inch) 8.5 mm (0.335 inch)
4.5 mm (0.177 inch) 9.5 mm (0.374 inch)
6.0 mm (0.236 inch) 15.0 mm (0.591 inch)
6.0 mm (0.236 inch) 15.0 mm (0.591 inch)
5.0 mm (0.197 inch) 15.0 mm (0.591 inch)
5.0 mm (0.197 inch) 15.0 mm (0.591 inch)
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Media considerations
Note Not all media types are supported in all modes.
Media for duplexer
The duplexer accepts standard-sized media as large as A3 media. The duplexer accepts up to 28 lb (105 g/m2) bond.
Envelopes
The Envelope media-type setting in the printer driver has been optimized for the best print adhesion for most envelopes. The Heavy Paper mode might also work well for some envelopes, especially if the printing environment humidity is low. Use the left (face-up) output bin to reduce curl. Envelopes with more than one flap can wrinkle, crease, and cause jams.
CAUTION
WARNING!
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To prevent severe printer damage, envelopes with peel-off adhesive strips must use adhesives compatible with the printer's fusing temperatures (approximately 190° C or 374° F).
Transparencies
The default output for all transparencies is the top output bin for all HP Color LaserJet 8550 printer models. The printer's internal color settings are optimized for the best color quality if Transparency is selected as the media type in the printer driver. Using other media type settings will result in less accurate colors. The printer only supports transparencies of 5 mils (0.13 mm) in thickness. To prevent damage to the printer, transparencies must be able to withstand the printer's fusing temperature (approximately 190° C or 374° F). Handle transparencies by the edges. Oil from your fingers can be deposited on the transparencies, causing print quality problems. Allow printed transparencies to cool before handling to prevent curling.
Allow transparencies to cool before handling to prevent burns.
Media requirements 35
Glossy media
If you want the effect of glossy media, use only HP LaserJet soft gloss media in this printer. HP soft gloss is the only glossy media supported by the printer. For ordering information, see page 513.
Heavy paper stock
Heavy paper stock is any paper from 28 lb to 58 lb (105 to 216 g/m2). Always print heavy paper stock from tray 1. In the printer driver, select Heavy Paper or Cardstock as the paper type on the paper tab to ensure the correct finish on the media. Also, use the left (face-up) output bin to prevent media jams. For more information about changing the printer driver settings, see the online help. Do not use extremely heavy paper stock (greater than 58 lb, or 216 g/m2 bond). Misfeeds, mis-stacking, media jams, poor toner fusing, poor print quality, and excessive mechanical wear can result.
Colored media
Colored media should be of the same high quality as white xerographic paper. Pigments used must be able to withstand the printer's fusing temperature (approximately 190° C, or 374° F). Do not use media on which a colored coating was added after production. The printer cannot detect the color of media you are using. Varying the shade or color of the media can change the shades of the printed colors.
36 Chapter 1 - Product information
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Media to avoid
To avoid poor print quality or damage to the printer, do not use any of the following: coated or embossed media prepunched paper in which the holes were punched 8 mm from the edge of the pages media with cutouts or perforations (except prepunched paper) multi-part forms media with irregularities, such as tabs or staples preprinted media with thermography or inks that melt, vaporize, or release hazardous emissions when subjected to the fusing temperature (approximately 190° C, or 374° F) media that produce hazardous emissions, melt, offset, or discolor when heated to the printer's fusing temperature (approximately 190° C, or 374° F) media that have already been through a photocopier or laser printer (even if there is no printing on the page) unless you use the "manual print second side" feature. media with watermarks, if solid fill areas are to be printed transparencies designed for ink jet printers any glossy media other than HP soft gloss media media with texture or finish different from one side to the other creased or folded media (except for supported envelopes)
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Media requirements 37
Identification (model and serial numbers)
To identify the model number and serial number, find the label located on the rear of the printer, similar to the one shown in figure 2 (the example shown is from an HP Color LaserJet 8500 printer).
(serial #)
(model #)
Figure 2.
Example of printer model number and serial number label (110 V and 220 V)
38 Chapter 1 - Product information
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Printer Information
Configurations
Available configurations for the HP Color LaserJet 8500 printer appear below; available configurations for the HP Color LaserJet 8550 printer are shown on the following page. The HP Color LaserJet 8500 printer is available in the following configurations:
HP Color LaserJet 8500
The HP Color LaserJet 8500 comes standard with a 100-sheet tray 1, a 500-sheet tray 2, a 500-sheet tray 3, a printer stand, and 32 MB random-access memory (RAM).
HP Color LaserJet 8500 N
The HP Color LaserJet 8500N comes standard with a 100-sheet tray 1, a 500-sheet tray 2, a 500-sheet tray 3, a printer stand, 32 MB RAM, an HP JetDirect print server (10/100 Base-TX), and an internal hard disk.
HP Color LaserJet 8500 DN
The HP Color LaserJet 8500DN comes standard with a 100-sheet tray 1, a 500-sheet tray 2, a 500-sheet tray 3, a (tray 4) 2000-sheet input tray, a duplexer, 64 MB RAM, an HP JetDirect print server (10/ 100 Base-TX), an internal hard disk, and five stabilizing legs.
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Printer Information 39
The HP Color LaserJet 8550 printer is available in the following configurations:
HP Color LaserJet 8550
The HP Color LaserJet 8550 comes standard with a 100-sheet tray 1, a 500-sheet tray 3, a printer stand, and 32 MB RAM.
HP Color LaserJet 8550 N
The HP Color LaserJet 8550N comes standard with a 100-sheet tray 1, a 500-sheet tray 2, a 500-sheet tray 3, a printer stand, 64 M