Lexmark 5021-0XX manual Low voltage power supply Lvps service check

5021-0XX

996—Low voltage power supply (LVPS) service check

Step	Questions / actions	Yes	No
1	Check cable for continuity	Go to step 2.	Replace cable.
	between engine controller
	board connector LVCN and
	HVPS ACN5 connector.
	Check cable for continuity
	between I/O board DCN21
	and HVPS ACN5
	connector. Also check for
	shorted pins. Is cable
	okay?
2	Replace LVPS. See “Low	Go to step 3.	Problem solved.
	voltage power supply
	(LVPS) with cage
	removal” on page 4-60.
	Does problem persist?
3	Replace engine controller	Replace I/O	Problem solved.
	board. See “Engine	board. See “I/O
	controller board removal”	board removal”
	on page 4-55. Does	on page 4-70.
	problem persist?

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