HP LaserJet 4345mfp Series - Page 23

List of figures
Figure 5-1 DC controller PCA block diagram..................................................................................................85
Figure 5-2 Power supply circuit block diagram................................................................................................87
Figure 5-3 Fuser components .........................................................................................................................88
Figure 5-4 Fuser circuit....................................................................................................................................90
Figure 5-5 High-voltage power supply circuit..................................................................................................91
Figure 5-6 Low-voltage power supply circuit...................................................................................................93
Figure 5-7 Laser/scanner assembly................................................................................................................95
Figure 5-8 Laser-control-circuit block diagram................................................................................................97
Figure 5-9 Image-formation system.................................................................................................................98
Figure 5-10 Cartridge memory...........................................................................................................................99
Figure 5-11 Eight stages of image-formation..................................................................................................100
Figure 5-12 Motor, clutch, and solenoid locations...........................................................................................103
Figure 5-13 Sensor and switch locations.........................................................................................................104
Figure 5-14 Pickup, feed, and delivery system................................................................................................105
Figure 5-15 Tray 1 timing.................................................................................................................................106
Figure 5-16 Tray 2 timing.................................................................................................................................107
Figure 5-17 Cassette pickup operation............................................................................................................109
Figure 5-18 Multifeed prevention.....................................................................................................................110
Figure 5-19 Distance-between-pages adjustment...........................................................................................111
Figure 5-20 Corner of the media contacts the shutter.....................................................................................112
Figure 5-21 Media sags until the entire leading edge contacts the shutter.....................................................113
Figure 5-22 Skew is corrected, and the shutter opens....................................................................................113
Figure 5-23 Fusing and reversing/delivery block.............................................................................................115
Figure 5-24 Face-down delivery: media enters the reversing unit..................................................................116
Figure 5-25 Face-down delivery: media reverses direction.............................................................................116
Figure 5-26 Face-up delivery...........................................................................................................................117
Figure 5-27 Paper path with 500-sheet feeders installed................................................................................122
Figure 5-28 500-sheet feeder I/O block diagram.............................................................................................123
Figure 5-29 500-sheet feeder pickup and feed diagram.................................................................................124
Figure 5-30 Duplex printing paper path...........................................................................................................125
Figure 5-31 Duplex printing control..................................................................................................................126
Figure 5-32 3-bin mailbox operation................................................................................................................129
Figure 5-33 Media flow when using the stacker mode....................................................................................130
Figure 5-34 Stapler/stacker operation.............................................................................................................133
Figure 5-35 Jogger operation (top view)..........................................................................................................134
Figure 5-36 Stapler unit operation...................................................................................................................136
Figure 5-37 ADF mechanical structure............................................................................................................137
Figure 5-38 Scanner assembly electrical structure.........................................................................................138
Figure 5-39 Scan carriage components..........................................................................................................139
Figure 5-40 Scan carriage movement.............................................................................................................140
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