HP Color LaserJet Enterprise MFP M680 series - Page 21

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
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