Table of contents 1 Theory of operation ....................................................................................................................................... 1 Basic operation ...................................................................................................................................................... 2 Major product systems ........................................................................................................................ 2 Product block diagram ........................................................................................................................
2 Sequence of operation ........................................................................................................................ 3 Normal sequence of operation ......................................................................................... 3 Formatter-control system ..................................................................................................................................... 4 Sleep mode ..........................................................................................................................................
4 Input/output ........................................................................................................................................ 4 CPU ....................................................................................................................................................... 4 Memory ................................................................................................................................................ 4 Firmware ...........................................................................................................................
4 Memory use ....................................................................................................................... 5 PJL overview ........................................................................................................................................ 5 PML ...................................................................................................................................................... 5 LEDM overview ....................................................................................................................................
5 Control panel ....................................................................................................................................... 6 ACL overview ....................................................................................................................................... 6 USB flash drive .................................................................................................................................... 6 Engine-control system ..........................................................................................................................................
7 DC controller operations ..................................................................................................................... 8 Fuser-control circuit .......................................................................................................................... 14 Motors, fans, clutches, solenoids, switches, and sensors ............................................................... 10 Fuser failure detection ................................................................................................... 15 Fuser temperature control .............................................................................................
16 Fuser heater protective function .................................................................................... 17 Low-voltage power supply ............................................................................................................... 18 Pressure roller cleaning .................................................................................................. 17 Overcurrent/overvoltage protection .............................................................................. 20 High-voltage power supply ...............................................................................................................
21 Laser/scanner system ......................................................................................................................................... 22 Laser failure detection ...................................................................................................................... 22 ENWW v