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 xxi