Internal components.................................................................................................................63 Timing.......................................................................................................................................64 Engine control system..............................................................................................................66 Laser/scanner system..............................................................................................................68 Pickup/feed/delivery system....................................................................................................69 Image-formation system...........................................................................................................71 Step 1:
Primary charging...................................................................................................72 Step 2: Laser beam exposure...........................................................................................72 Step 3: Developing............................................................................................................73 Step 4: Transfer.................................................................................................................73 Step 5: Separation.............................................................................................................74 Step 6:
Fusing....................................................................................................................74 Step 7:
Drum cleaning.......................................................................................................75 Print cartridge memory system................................................................................................76 6 Removal and replacement Chapter contents......................................................................................................................77 Introduction ..............................................................................................................................78 Removal and replacement strategy ..................................................................................78 Electrostatic discharge .....................................................................................................78 User-replaceable parts .....................................................................................................78 Required tools ...................................................................................................................78 Before performing service .......................................................................................................79 Pre-service procedures ....................................................................................................79 Parts removal order ..........................................................................................................80 Covers......................................................................................................................................81 Right-side cover.................................................................................................................81 Back cover.........................................................................................................................82 I/O cover............................................................................................................................85 Left-side cover...................................................................................................................86 Top, right cover..................................................................................................................88 Top cover...........................................................................................................................89 Front, right cover................................................................................................................90 Control panel............................................................................................................................92 Formatter..................................................................................................................................94 Fuser........................................................................................................................................98 Laser/scanner........................................................................................................................103 Right-side handle...................................................................................................................106 ECU........................................................................................................................................108 Access plate...........................................................................................................................114 Power supply..........................................................................................................................115 Gear assembly.......................................................................................................................120 Tray 1 solenoid.......................................................................................................................124 Tray 2 solenoid.......................................................................................................................125 E-label reader (memory tag)..................................................................................................126 Face-down-roller shaft...........................................................................................................128 Cartridge door........................................................................................................................130 Transfer roller.........................................................................................................................133 Registration assembly............................................................................................................134 Tray 1 pickup roller.................................................................................................................137 Tray 2 pickup roller.................................................................................................................138 Separation pad.......................................................................................................................140 7 Troubleshooting Chapter contents....................................................................................................................141 ENWW v