Lexmark 5021-0XX manual Operator panel service check, Controller board removal On page 4-55. Does

5021-0XX

Operator panel service check

Printer emits 5 beeps when it detects a problem with operator panel assembly, operator panel cable, controller RIP board or when a POR does not complete. If operator panel operates properly, except for a PEL or a few PELs missing or broken, run “LCD test” in diagnostic mode. See “LCD test” on page 3-9for details. If operator panel fails any diagnostic test, replace operator panel.

Step	Questions / actions	Yes	No
1	Ensure operator panel	Go to step 2.	Connect cable.
	cable is plugged into
	operator panel and other
	end of cable is plugged into
	P2CN on engine controller
	board. Is cable plugged in?
2	Ensure RIP board is	Go to step 3.	Connect cable.
	correctly plugged in. Is
	cable plugged in?
3	Is operator panel display	Replace	Go to step 6.
	blank, did 5 beeps emit	operator panel
	when printer was turned	assembly. If
	ON and is LED off?	problem
		persists, go to
		step 4.
4	Replace operator panel	Problem solved.	Go to step 5.
	cable. Does problem go
	away?
5	Replace engine controller	Problem solved.	Go to step 6.
	board. See “Engine
	controller board removal”
	on page 4-55. Does
	problem go away?
6	Does operator panel show	Check RIP	Replace
	all diamonds and were	board for proper	operator panel.
	there no beeps when	installation. If
	printer was powered on?	properly
		installed, replace
		RIP board. See
		“RIP board
		removal” on
		page 4-45.

2-84Service Manual