List of figures Figure 1-1 Relationship between the main product systems .............................................................................................. 2 Figure 1-2 System block diagram ........................................................................................................................................ 3 Figure 1-3 Engine-control system ........................................................................................................................................ 8 Figure 1-4 DC controller block diagram ...............................................................................................................................
9 Figure 1-5 High-voltage power supply circuits .................................................................................................................. 14 Figure 1-6 Low-voltage power-supply circuit ................................................................................................................... 16 Figure 1-7 Fuser components ............................................................................................................................................ 19 Figure 1-8 Fuser temperature-control circuit ....................................................................................................................
20 Figure 1-9 Laser/scanner system ...................................................................................................................................... 23 Figure 1-10 Protective-glass cleaners (PGCs) ................................................................................................................... 25 Figure 1-11 Image-formation system ............................................................................................................................... 26 Figure 1-12 Image-formation drive system ......................................................................................................................
27 Figure 1-13 Image-formation process ............................................................................................................................... 28 Figure 1-14 Pre-exposure .................................................................................................................................................. 29 Figure 1-15 Primary charging ............................................................................................................................................ 29 Figure 1-16 Laser-beam exposure .....................................................................................................................................
30 Figure 1-17 Development .................................................................................................................................................. 30 Figure 1-18 Primary transfer ............................................................................................................................................. 31 Figure 1-19 Secondary transfer ......................................................................................................................................... 31 Figure 1-20 Separation .......................................................................................................................................................
32 Figure 1-21 Fusing .............................................................................................................................................................. 32 Figure 1-22 ITB cleaning ..................................................................................................................................................... 33 Figure 1-23 Drum cleaning .................................................................................................................................................
33 Figure 1-24 Toner cartridge system .................................................................................................................................. 34 Figure 1-25 Developing-roller engagement and disengagement control ........................................................................ 35 Figure 1-26 ITB unit ............................................................................................................................................................ 37 Figure 1-27 Three states of primary-transfer roller engagement and disengagement ..................................................
39 Figure 1-28 ITB cleaning process ....................................................................................................................................... 40 Figure 1-29 Toner patterns for calibration ........................................................................................................................ 41 Figure 1-30 Paper path ....................................................................................................................................................... 43 Figure 1-31 Switches and sensors for the pickup, feed, and delivery system (M651 only) .............................................
44 Figure 1-32 Switches and sensors for the pickup, feed, and delivery system (M680 only) ............................................. 44 ENWW xix