Lexmark 5021-0XX manual Duplex connection error 2 service check

5021-0XX

986—Duplex connection error 2 service check

Step	Questions / actions	Yes	No
1	Check duplex unit cable. is	Replace duplex	Properly connect
	cable properly connected?	unit. See	cable. If problem
		“Duplex unit	persists, go to
		assembly	step 2.
		removal” on
		page 4-13. If
		problem
		persists, go to
		step 2.
2	Check cable connection to	Go to step 3.	Properly connect
	connector DPCN located		cable. If problem
	on engine controller board.		persists, go to
	See “Engine controller		step 3.
	board removal” on
	page 4-55for steps
	required to remove engine
	controller board cover. This
	will allow access to DPCN.
	Is cable properly
	connected?
3	Disconnect cable and	Replace engine	Replace faulty
	check for continuity	controller board.	cable.
	between DPCN connector	See “Engine
	and duplex connector	controller
	located on back of printer.	board removal”
	Is there continuity?	on page 4-55.

2-64Service Manual