Lexmark 5021-0XX - Manual (Page 74)

1-48 Service Manual
5021-0XX
Control of print process
Control block diagram
Note: A micro CPU mounted on the engine board controls the print
processes.
No. Control process Function
1 Sequence control Controls print sequence of printer.
2 Temperature
control Controls temperature of fuser unit.
3 Consumables’ life
control Controls toner empty status for each toner
cartridge and life of periodic replacement
parts.
4 Operator panel
control Controls operator panel indication and
operator signals.
5 Error processing
control Senses errors occurring as well as stop
procedures.
6 Interface control Controls receipt and transmission of interface
signals from external controller.
7 Laser control Controls laser scanning and laser power.