Product start up sequence (turn on product) ................................................................... 102 Timing chart ..................................................................................................................... 103 Scanner subsystem ......................................................................................................... 103 Mechanical structure ....................................................................................... 103 Motors and fans ..............................................................................................
105 Basic block diagram ........................................................................................ 106 Basic system configuration ............................................................................. 107 Scanner unit systems ..................................................................... 107 Scan mode ..................................................................................... 108 Power supply assembly .................................................................. 108 Sleep mode .................................................................................... 109 Low-voltage power supply circuit ....................................................
110 Protective functions ........................................................................ 111 Scanner controller circuit ................................................................ 112 Flatbed operation ............................................................................................ 114 Flatbed document exposure control ............................................... 114 Flatbed optical drive control ............................................................ 114 Flatbed optical unit operation ......................................................... 115 Flatbed document size detection ....................................................
116 ADF operation ................................................................................................. 118 ADF document exposure control .................................................... 118 ADF document feed control ............................................................ 119 ADF document size detection ......................................................... 121 ADF feeder sensors ........................................................................ 122 ADF document skew detection ....................................................... 122 Scanned data flow ...........................................................................................
123 Copy processor ............................................................................................... 124 Scanning process control signals ................................................... 125 Typical scanning process flow ........................................................ 126 Engine control system ...................................................................................................................... 127 DC controller PCA ........................................................................................................... 128 High-voltage power supply circuit ....................................................................................
129 Low-voltage power supply ............................................................................................... 131 Fuser control circuit ......................................................................................................... 131 Formatter system ............................................................................................................................. 133 Formatter hardware ......................................................................................................... 133 Laser/scanner system ......................................................................................................................
134 Image formation system ................................................................................................................... 135 The image formation process .......................................................................................... 135 Print cartridge .................................................................................................................. 136 Print cartridge design ...................................................................................... 137 No-shake toner ................................................................................................
137 Cartridge memory ........................................................................................... 137 Toner seal ....................................................................................................... 137 vi ENWW