HP Color LaserJet Enterprise CP4020 Service Manual - Page 548
DC controller PCA, DLC/LLC information
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PCA locations xxviii pickup, feed, and delivery 37 print cartridge 28 protection for 13, 15 configuration page 242 configuration pages information 311 printing 307 configure device menu 321 connectors controller PCA (optional paper feeder) 283 DC controller PCA 281, xxviii control panel cleaning page, printing 416 I/O menu 334 menus 314 messages, alphabetical list xvii messages, numerical list 345 messages, types of 345 Show Me How menu 314 control-panel assembly removing 95 control-panel menus manage supplies 318 retrieve job 314 controller (optional paper feeder) PCA (optional paper feeder), removing 232 PCA, connectors 283 conventions, document iii cooling areas and fans xvii copying quality, troubleshooting 410 counts color cycle 420 mono cycle 420 page, reset 420 print engine maintenance 311 refurbish cycle 421 refurbish page 421 reset after replacing formatter 420 reset by NVRAM initialization 423 See also pages counts covers control-panel assembly, removing 95 front door (optional paper feeder), removing 216 front-door assembly, removing 95 front-top, removing 95 identification and location xxiii left cover (optional paper feeder), removing 222 left, removing 95 locations 284 power-supply cover, removing 95 rear cover (optional paper feeder), removing 218 rear, removing 95 rear-right cover (optional paper feeder), removing 225 rear-top, removing 95 right cover (optional paper feeder), removing 224 right door (optional paper feeder), removing 216 right-door assembly, removing 95 right-front cover (optional paper feeder), removing 219 right-front, removing 95 right-rear, removing 95 upper-left cover, removing 95 creases, troubleshooting 415 crooked pages troubleshooting 414 current-detection protection circuit 16 customer self repair, part numbers 428 customer support online 500 D dark image, troubleshooting 410 date codes for firmware 311 manufacture 309 product first used 422 DC controller clutches 6 components 5 fans 9 motors 8 PCA and tray, removing 155 PCA only, removing 155 PCA, connectors 281, xxviii sensors 7 solenoids 5 switches 6 temperature controls 15 voltage detection 13 DC motors xvii DC voltages converted from AC 12 Declaration of Conformity 511 defeating front-door logic switch 269 front-door safety switch 268 interlocks 243 right-door logic switch 270 right-door safety switch 269 defects, repeating 312 delivery assembly removing 145 demo page 242 density control 36 development process 25 DHCP 335 diagnostics component 274 engine 243 LED 242 networks 338 page, printing 305 See also tests; troubleshooting diagnostics menu 342 diagrams components 277 DIMM memory, removing 81 disk initialization 423 disposal, end-of-life 509 DLC/LLC 337 DLC/LLC information 310 DNS settings 336 document conventions iii doors. See covers double-sided printing (duplexing) Show Me How menu 314 516 Index ENWW