List of figures Figure 1-1 Product block diagram ........................................................................................................................................ 2 Figure 1-2 Engine-control system ........................................................................................................................................ 7 Figure 1-3 DC controller block diagram ...............................................................................................................................
8 Figure 1-4 Motors ............................................................................................................................................................... 10 Figure 1-5 Fans ................................................................................................................................................................... 11 Figure 1-6 Solenoids and clutches .....................................................................................................................................
12 Figure 1-7 Switches ............................................................................................................................................................ 13 Figure 1-8 Sensors .............................................................................................................................................................. 13 Figure 1-9 Fuser control circuit ..........................................................................................................................................
14 Figure 1-10 Fuser-heater control circuit ............................................................................................................................ 16 Figure 1-11 Low-voltage power supply (LVPS) ................................................................................................................. 18 Figure 1-12 High-voltage power supply ............................................................................................................................ 21 Figure 1-13 Laser/scanner system ....................................................................................................................................
22 Figure 1-14 Electrophotographic process block diagram (1 of 2) ..................................................................................... 24 Figure 1-15 Electrophotographic process block diagram (2 of 2) ..................................................................................... 25 Figure 1-16 Image formation process ............................................................................................................................... 26 Figure 1-17 Primary charging ............................................................................................................................................
27 Figure 1-18 Laser beam exposure ..................................................................................................................................... 27 Figure 1-19 Print cartridge ................................................................................................................................................. 28 Figure 1-20 Transfer ...........................................................................................................................................................
29 Figure 1-21 Separation ....................................................................................................................................................... 29 Figure 1-22 Fusing .............................................................................................................................................................. 30 Figure 1-23 Drum cleaning ................................................................................................................................................. 30 Figure 1-24 Pickup, feed, and delivery system block diagram .........................................................................................
31 Figure 1-25 Photo sensors, motor, and solenoid .............................................................................................................. 32 Figure 1-26 Multiple-feed prevention ................................................................................................................................ 34 Figure 1-27 Scanner mechanism ........................................................................................................................................ 38 Figure 1-28 ADF paper path ...............................................................................................................................................
40 Figure 2-1 Control-panel 2ndary Service test access buttons .......................................................................................... 53 Figure 2-2 Sample engine test page .................................................................................................................................. 54 Figure 2-3 Engine controller PCA connectors (M201, M202) ............................................................................................. 56 Figure 2-4 Engine controller PCA connectors (M225, M226) ............................................................................................. 57 ENWW xiii