HP Color LaserJet Enterprise CP4020 Service Manual - Page 553

Q quality. See print quality R recycling HP printing supplies returns and environmental program 508 reformat product hard disk 423 registration assembly removing 128 registration roller Service menu reset 422 regulatory statements Declaration of Conformity 511 environmental product stewardship program 507 removing parts cartridge fan 137 cassette feed guide 118 cautions for 68 checklists 70 control-panel assembly 95 controller PCA (optional paper feeder) 232 DC controller PCA and tray 155 DC controller PCA only 155 delivery assembly 145 delivery fan 143 developing-disengagement motor 168 drum motors 199 duplex-drive assembly 151 environmental sensor 137 exhaust fan 169 feed and separation rollers 86 formatter PCA 78 front door (optional paper feeder) 216 front-door assembly 95 front-top cover 95 fuser 85 fuser motor 200 fuser-drive assembly 211 hard drive 79 high-voltage power supply lower 163 high-voltage power supply upper 196 interconnect board (ICB) 153 intermediate transfer belt 92 ITB motor 202 laser/scanner assembly (C/ Bk) 190 laser/scanner assembly (Y/ M) 186 left cover 95 left cover (optional paper feeder) 222 lifter assembly (optional paper feeder) 229 lifter base assembly 175 lifter-drive assembly 173 lifter-drive assembly (optional paper feeder) 230 low-voltage power supply 157 main-drive assembly 203 memory DIMM 81 pickup assembly (optional paper feeder) 226 pickup motor 172 pickup motor (optional paper feeder) 231 pickup roller (tray 1) 87 power-supply cover 95 power-supply fan 152 print cartridges 70 rear cover 95 rear cover (optional paper feeder) 218 rear-right cover (optional paper feeder) 225 rear-top cover 95 registration assembly 128 registration density (RD) sensor assembly 124 residual-toner and feed assembly 134 residual-toner-feed motor 133 right cover (optional paper feeder) 224 right door (optional paper feeder) 216 right-door assembly 95 right-front cover 95 right-front cover (optional paper feeder) 219 right-rear cover 95 secondary transfer assembly 119 secondary transfer roller 90 separation pad (Tray 1) 121 toner-collection sensor and scanner-thermistor assembly 141 toner-collection unit 76 tools, required 69 tray cassette 70 tray-pickup assembly 180 tray-pickup drive assembly 178 upper-left cover 95 repeating defects, troubleshooting 312 replacing parts 68 reset product 424 resets menu 342 resolution troubleshooting quality 410 retrieve job menu 314 reverse and feed control, duplexer 52 right door jams 346 roller feed and separation roller (Trays 2-5), removing 86 pickup roller (Tray 1), removing 87 rollers locations xxviii secondary transfer roller, removing 119 separation pad (Tray 1), removing 121 ruler, repetitive defect 312 S safety features when front door is open 13 safety statements 512, 513 scanner-motor failure 19 screwdrivers, required 69 screws part numbers 430 replacing 68 secondary transfer processes 26 secondary transfer roller, removing 90 ENWW Index 521