HP 8550 Service Manual - Page 718

color correction CCD settings 94 color balance, CMYK 86 displacement 471 offset level, RGB 68 output values, RGB 67 RGB ratios 84 shading target values, RGB 67 test print options 110, 466 theory of 212 COLOR menu 86 communications automatic document feeder (ADF) 245 control 232 high capacity input (HCI) 304 IPC 245 compliance information 35 condensation, troubleshooting 463 conformity, declarations of 35 connecting copy module to PC 137, 138 flexible cable 356 PC to copy module 137, 138 power plug 462 power supply 237 connection status accessories 66 connectors automatic document feeder (ADF), part numbers 645 copy module, diagrams 591, 598 copy module, part numbers 591, 597, 598 high-capacity input (HCI), diagrams 669 high-capacity input (HCI), part numbers 669 interface 33 power supply cord 26 printer power cord 26 consumables ordering 41 context-sensitive help 49 contrast adjustment control panel 49 LCD 232 control card signals 80 control key 26 control panel adjusting contrast 49 assembly diagrams 572, 584 CPU, circuitry 179 CPU, diagrams and part numbers 585 CPU, functions 232 diagrams 26 functions 232 inverter, diagrams and part numbers 586 key descriptions 96 LCD lifespan 163 menu 94 part numbers 573, 584 power switch 50 removing 344 soft switch 177 specifications 23 troubleshooting 458 user mode 52 control system, copy module 178 controller PCB, copy module part numbers 587 removing 370 replacing 57, 129 controllers ADF sensors 82 automatic document feeder (ADF), adjusting 158 automatic document feeder (ADF), circuit diagrams 290, 292 copy module PCB, removing 370 copy module, diagrams and part numbers 587 DADF PCB 246 dc PCB, part numbers 119 dc PCB, replacing 120 deck PCB, diagrams 319 deck PCB, operations 304 deck PCB, part numbers 668 deck PCB, removing 453 laser PCB 109 RDF, diagrams and part numbers 644 reader controller PCB 179 conversions BGR to YMC 216 RGB 214 cool down period toner 177 COPIER screen 60 copy module ac power, troubleshooting 519 accessories power supply, removing 374 accessories power supply, voltage 239 analog image processor 588 assembly location diagrams 561 automatic gradation adjustments 125 backing up settings 62 batteries 179 circuitry 179 cleaning 165 cold reset 57 connecting to PC 137, 138 connectors 591 control system 178 controller PCB, removing 370 controller PCB, replacing 57, 129 covers, diagrams 562 covers, identifying 333 716 Index EN