HP Color LaserJet Enterprise CM4540 MFP Series - Page 37

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 ............................................................................................................. 5
Figure 1-4 DC controller block diagram ................................................................................................... 6
Figure 1-5 High-voltage power supply circuits ........................................................................................ 12
Figure 1-6 Low-voltage power-supply circuit ........................................................................................... 14
Figure 1-7 Fuser components ................................................................................................................ 16
Figure 1-8 Fuser temperature-control circuit ............................................................................................ 17
Figure 1-9 Laser/scanner system ........................................................................................................... 21
Figure 1-10 Protective-glass cleaners (PGCs) .......................................................................................... 23
Figure 1-11 Image-formation system ...................................................................................................... 24
Figure 1-12 Image-formation drive system .............................................................................................. 25
Figure 1-13 Image-formation process .................................................................................................... 26
Figure 1-14 Pre-exposure ..................................................................................................................... 27
Figure 1-15 Primary charging ............................................................................................................... 27
Figure 1-16 Laser-beam exposure ......................................................................................................... 28
Figure 1-17 Development ..................................................................................................................... 28
Figure 1-18 Primary transfer ................................................................................................................. 29
Figure 1-19 Secondary transfer ............................................................................................................ 29
Figure 1-20 Separation ....................................................................................................................... 30
Figure 1-21 Fusing .............................................................................................................................. 30
Figure 1-22 ITB cleaning ...................................................................................................................... 31
Figure 1-23 Drum cleaning .................................................................................................................. 31
Figure 1-24 Print-cartridge system ......................................................................................................... 32
Figure 1-25 Developing-roller engagement and disengagement control ..................................................... 33
Figure 1-26 ITB unit ............................................................................................................................. 34
Figure 1-27 Three states of primary-transfer-roller engagement and dis
engagement ..................................... 36
Figure 1-28 ITB cleaning process .......................................................................................................... 37
Figure 1-29 Toner patterns for calibration .............................................................................................. 38
Figure 1-30 Paper path ....................................................................................................................... 40
Figure 1-31 Switches and sensors for the pickup, feed, and delivery system ............................................... 41
Figure 1-32 Motors and solenoids for the pickup, feed, and delivery system .............................................. 42
ENWW xxxv