List of figures Figure 1-1 Relationship between the main product systems ............................................................................. 2 Figure 1-2 Engine-control system ...................................................................................................................... 4 Figure 1-3 DC controller block diagram .............................................................................................................. 5 Figure 1-4 High-voltage power supply circuits .................................................................................................
10 Figure 1-5 Low-voltage power-supply circuit .................................................................................................... 12 Figure 1-6 Fuser components .......................................................................................................................... 14 Figure 1-7 Fuser temperature-control circuit .................................................................................................... 15 Figure 1-8 Laser/scanner system .....................................................................................................................
18 Figure 1-9 Protective-glass cleaners (PGCs) ................................................................................................... 20 Figure 1-10 Image-formation system ............................................................................................................... 21 Figure 1-11 Image-formation drive system ....................................................................................................... 22 Figure 1-12 Image-formation process ..............................................................................................................
23 Figure 1-13 Pre-exposure ................................................................................................................................ 24 Figure 1-14 Primary charging ........................................................................................................................... 24 Figure 1-15 Laser-beam exposure ................................................................................................................... 25 Figure 1-16 Development .................................................................................................................................
25 Figure 1-17 Primary transfer ............................................................................................................................ 26 Figure 1-18 Secondary transfer ........................................................................................................................ 26 Figure 1-19 Separation ..................................................................................................................................... 27 Figure 1-20 Fusing ...........................................................................................................................................
27 Figure 1-21 ITB cleaning .................................................................................................................................. 28 Figure 1-22 Drum cleaning ............................................................................................................................... 28 Figure 1-23 Print-cartridge system ................................................................................................................... 29 Figure 1-24 Developing-roller engagement and disengagement control .........................................................
30 Figure 1-25 ITB unit .......................................................................................................................................... 31 Figure 1-26 Three states of primary-transfer-roller engagement and disengagement ..................................... 33 Figure 1-27 ITB cleaning process .................................................................................................................... 34 Figure 1-28 Toner patterns for calibration ........................................................................................................
35 Figure 1-29 Paper path .................................................................................................................................... 37 Figure 1-30 Switches and sensors for the pickup, feed, and delivery system ................................................. 38 Figure 1-31 Motors and solenoids for the pickup, feed, and delivery system .................................................. 39 Figure 1-32 Three main units of the pickup, feed, and delivery system ...........................................................
40 Figure 1-33 Pickup-and-feed unit ..................................................................................................................... 41 Figure 1-34 Cassette-pickup mechanism ......................................................................................................... 42 ENWW xxi