Lexmark 5021-0XX 930,931,932-Laser unit assembly service check, Printhead, Removal on 4-24. Go

5021-0XX

930,931,932—Laser unit assembly service check

Step	Questions / actions	Yes	No
1	Check LCN connection on	Go to step 2.	Properly connect
	laser assembly LDU board.		LCN cable. If
	Is connector properly		error clears,
	connected?		problem solved,
			otherwise go to
			step 2.
2	Check LCN connection on	Go to step 3.	Properly connect
	engine controller board. Is		LCN cable. If
	cable properly connected?		error clears,
			problem solved,
			otherwise go to
			step 3.
3	Check cable that connects	Replace laser	Replace cable.
	engine controller board	unit assembly.	Go to step 4.
	LCN and LDU LCN	“Laser unit
	connectors for continuity	assembly
	and shorted pins. Is cable	(printhead)
	okay?	removal” on
		page 4-24. Go
		to step 4.
4	Does error clear?	Problem solved.	Replace engine
			controller board.
			See “Engine
			controller
			board removal”
			on page 4-55.

2-62Service Manual