Lexmark 5021-0XX manual Control of print process, Control block diagram

5021-0XX

Control of print process

Control block diagram

No.	Control process	Function
1	Sequence control	Controls print sequence of printer.
2	Temperature	Controls temperature of fuser unit.
	control
3	Consumables’ life	Controls toner empty status for each toner
	control	cartridge and life of periodic replacement
		parts.
4	Operator panel	Controls operator panel indication and
	control	operator signals.
5	Error processing	Senses errors occurring as well as stop
	control	procedures.
6	Interface control	Controls receipt and transmission of interface
		signals from external controller.
7	Laser control	Controls laser scanning and laser power.

Note: A micro CPU mounted on the engine board controls the print processes.

1-48Service Manual