Lexmark 5021-0XX manual Duplex connection error 1 service check

5021-0XX

985—Duplex connection error 1 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 ACN4 located on		cable. If problem
	low voltage power supply.		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 ACN4.
	Is cable properly
	connected?
3	Disconnect cable from	Replace low	Replace faulty
	ANC4 and check for	voltage power	cable.
	continuity between ACN4	supply. See
	connector and duplex	“Low voltage
	connector located on back	power supply
	of printer. Is there	(LVPS) with
	continuity?	cage removal”
		on page 4-60.

Diagnostic information 2-63