Lexmark 5021-0XX manual Paper size sensing service check

			5021-0XX
Paper size sensing service check
Step	Questions / actions	Yes	No
1	Turn printer off and remove	Go to step 2.	Properly connect
	I/O board shield. See “I/O		cable.
	board removal” on
	page 4-70for steps to
	remove I/O board shield. Is
	cable properly connected
	to I/O board connector
	DCN19?
2	Reconnect operator panel.	Go to step 5.	Go to step 3.
	Turn printer on and check
	for 5 VDC between DCN19
	pin 1 and ground (you can
	touch negative lead of
	voltmeter to metal bracket
	that holds I/O board to
	obtain ground.) Is 5 VDC
	present?
3	Disconnect cable from	Replace I/O	Go to step 4.
	DCN13 on I/O board. On	board. See “I/O
	cable that connects to	board removal”
	DCN13, check for 5 VDC	on page 4-70.
	between pins 11 and 12. Is
	5 VDC present?
4	Check cable continuity	Replace LVPS.	Replace cable.
	between LVPS ACN1 and I/	See “Low
	O board DCN13. Also	voltage power
	check for shorted pins. Is	supply (LVPS)
	cable okay?	with cage
		removal” on
		page 4-60.

Diagnostic information 2-87