HP 8550 Service Manual - Page 715
B, pick-up jams 74 - white gear
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atmospheric pressure 25 auto clear time 55 auto gradation correction adjusting 125 controlling 99 settings 91 auto paper selection 51, 197 auto power save mode 55, 235 auto power-off time 55 auto ratio selection 51, 197 auto start copying 51 Automated Support Access Program (ASAP) 42 automatic cassette selection 53 automatic document feeder (ADF) adjustments 140 assembly diagrams 605 belt drive motor assembly 634 capacity 29 circuit breaker 285 circuitry 244, 290, 292 cleaning 164, 168 clearing jams 282 clutch 249 communication 245 connectors 645 controllers, adjusting 158 copyglass positioning 145 covers, identifying 377 covers, part numbers 607 delivery operation 266 detecting originals 269, 271 DF assembly 608 diagrams 30 dimensions 29 display boards 302 document tray assembly 612 document tray, adjusting 146 double-sided original mode 252 electrical adjustments 155 electrical circuitry 244 error history 69 functional overview 250 gears 384 height, adjusting 141 horizontal size plate adjustments 145 indicator PCB 288 jams, clearing 281 left edge stop position, adjusting 147 life span, parts 163 lower paper guide assembly 638 lubricants 174 measuring stop position 148 motors, operation 249 motors, removing 387 motors, types of 286 mounting hardware 606 MS1 (open/closed switch) adjustments 151 open/closed switch, adjusting 151 original skew adjustments 142 originals, detecting 269, 271 originals, improperly placed 282 original-width-detecting variable resistor (VR1), adjusting 157 original-width-detection volume 383 paper feed motor assembly 632 part numbers 600 parts, life span 163 PCBs 287 pick-up jams 74 power supply 285 RDF controller 644 recirculating lever 274 reduced page composition mode 255 removing 378 resetting 75 RF assembly 616 right paper delivery assembly 630 sensors, adjusting 155 separation belt pressure 152 separation paper assembly 642, 643 separation roller assembly 640 servicing 377 sheet-to-sheet gap, adjusting 149 side guide lock, removing 382 solenoids 286 specifications 28 timing charts 288, 303 top pick-up mode 256, 257 upper paper guide assembly 636 automatic gradation adjustment 57 B B image signal 210 backgrounds auto control, theory of operation 204 cancellation, theory of 213 colored, adjusting for 121, 205 omission mode 213 white 205 backing up data 179 settings 62 bands, part numbers 681 bank note detection function overview 231 troubleshooting 480 base plate misplaced images and 160 position, adjusting 160 batteries, lithium copy module 179 part numbers 681 EN Index 713