Table of contents 1 Theory of operation .......................................................................................................... 1 Basic operation ........................................................................................................................ 2 Sequence of operation ............................................................................................... 3 Normal sequence of operation ..................................................................... 3 Formatter-control system ............................................................................................................
5 Sleep mode .............................................................................................................. 5 Input/output ............................................................................................................. 6 CPU ........................................................................................................................ 6 Memory ................................................................................................................... 6 Firmware ...................................................................................................
6 Nonvolatile memory ................................................................................... 6 PJL overview ............................................................................................................. 6 PML ......................................................................................................................... 7 Control panel ........................................................................................................... 7 Engine-control system ................................................................................................................
8 DC controller ............................................................................................................ 9 Motors .................................................................................................... 11 Fans ....................................................................................................... 13 Fuser-control circuit ................................................................................... 14 Fuser temperature control ........................................................... 15 Fuser protective function .............................................................
16 Fuser failure detection ................................................................ 17 Fuser installation protection ........................................................ 17 Fuser presence detection ............................................................ 17 Fuser life detection .................................................................... 17 Low-voltage power supply ......................................................................... 18 Power-outage recovery circuit ..................................................... 19 Sleep mode operation ...............................................................
19 Automatic damp paper detection ................................................ 19 Overcurrent/overvoltage protection ............................................. 20 High-voltage power supply ........................................................................ 21 Laser/scanner system ............................................................................................................. 23 ENWW v