HP LaserJet Pro M201n - Page 15

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
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