Lexmark 5021-0XX manual Fuser fan service check, See Rear, Interlock switch Cover assembly

5021-0XX

913—Fuser fan 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
	DCN7?
2	Ensure rear cover	Potentially faulty	Replace I/O
	assembly cover is shut.	fuser fan.	board. See “I/O
	Override top and front	Replace rear	board removal”
	cover interlock switches.	cover assembly.	on page 4-70.
	For location, see	See “Rear	Retest printer. If
	“Interlock switch	cover assembly	error clears,
	locations” on page 5-8.	removal” on	problem solved,
	Reconnect operator panel.	page 4-22.	else go to step 3.
	Turn printer on and check	Retest printer. If
	for 24VDC between	error clears,
	DCN7pin 10 and power	problem solved,
	ground (you can touch	else go to step 3.
	negative lead of voltmeter
	to metal bracket that holds
	I/O board to obtain ground.)
	Is voltage present and
	correct?
3	Turn printer off and check	Replace engine	Replace cable.
	cable that connects engine	controller board.
	controller board connector	See “Engine
	I1CN to I/O board	controller
	connector DCN1 for	board removal”
	continuity and pin shorts. Is	on page 4-55.
	cable okay?

2-52Service Manual