HP 8550 Service Manual - Page 725
I, HP Fax Information Retrieval Support Technology
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covers, removing 435 deck controller part numbers 668 deck controller PCB 304 diagrams 33 dimensions 32 environment, operating 32 feed sensor 313 gap, adjusting 159 internal components 656 jams 313 lifter drive assembly 663 lifter operation 310 lifter wire, removing 442 lubricants 174 motors 316 mounting hardware 653 operating environment 32 overcurrent protection 314 paper pick-up assembly 664 part numbers 649 parts, removing 435 PCBs 317 pick-up unit, removing 437 power supply 314 power supply, removing 454 remaining paper detection 311 removing parts 435 sensors 315 solenoids 316 specifications 32 troubleshooting 535 hinges, part numbers 690 history errors 493 jams 67 holders, part numbers 690 hole image erase 51 home position sensor 190, 504 hooks, part numbers 690 horizontal lines, troubleshooting 485 horizontal registration, adjusting 124 horizontal reproduction ratio 222 horizontal size plate, adjusting 145 horizontal stripe test print 466 HP ASAP (Automated Support Access Program) 42 HP Automated Support Access Program (ASAP) 42 HP Customer Care Centers (CCC) Asia Pacific 46 Canada 45 Europe 45 USA 45 HP Customer Care Online 40 HP Direct 44 HP Distribution ordering information 39 HP Driver Distribution Center 44 HP Fax Information Retrieval Support Technology (FIRST) 43 HP FIRST (Fax Information Retrieval Support Technology) 43 HP LaserJet 8550 119 HP LaserJet 8550 MFP unique parts 119 HP Technical Training 40 HPD (Hewlett-Packard Distribution) ordering information 39 hues, test prints for 467 humidity copy module 25 high, effects on quality 99, 102 high-capacity input (HCI) 32 internal 69 low, effects on quality 99, 101 operating environment 462 sensors 79 HV-TR settings 87, 92 I I/O mode DC-CON menu 79 descriptions 77 FEEDER menu 81 R-CON menu 80 screen levels 78 ID key 50 ID mode 50 identifying original-size 197, 199 idler gears, removing 400 image files, localization firmware 135 image margin, adjusting 122 image processing analog 203 digital 206 enlargement, theory of 222 reduction, theory of 222 theory of operation 200 image processor block 206 image processor, analog diagrams 588 part numbers 588 image quality automatic gradation adjustments 125 background cancellation 213 end user adjustments 121 options 99 priority mode 204 troubleshooting 476 image quality priority mode 204 image shifting 224, 225 image signals B 210 channels 201, 202 EN Index 723