Lexmark 4069-XXX manual Operator Panel Display Service Check

4069-XXX

	FRU	Action
2	Engine Board	Check the voltage at J11-5. The
	(No buttons work)	voltage measures approximately
		+5 V dc with the controller board
		removed. If incorrect, replace the
		engine board. If correct, check the
		continuity of the operator panel
		cable. If incorrect, replace the cable.
		If correct, replace the operator panel
		assembly.

Operator Panel Display Service Check

SERVICE TIP: The printer has detected a problem with the engine board, operator panel cable or operator panel assembly if POST does not complete and the printer emits 5 beeps and stops in a continuous pattern until the printer is turned off. The operator panel cable is an individual cable on some printers and a combination cable assembly with the cover switch cable on later models.

Note: If the operator panel is operating properly except for a PEL or a few PELS missing or broken, run the “LCD Test” on page 3-9from the hardware tests before continuing with this diagnostic service check.

	FRU	Action
1	Operator Panel Cable	Check for proper installation of the
		cable at the engine board (J11) and
		at the operator panel. Check the
		continuity of the operator panel
		cable. If incorrect, replace the cable.
2	Operator Panel Display	Check the voltage at J11-2 on the
	blank, 5 beeps, LED Off	engine board. It measures
		approximately +5 V dc. If incorrect,
		replace the engine board. If correct,
		replace the operator panel assembly.
3	Operator Panel Display	Check for ground between J13-4 and
	blank, 5 beeps, LED On	ground. If correct, replace the
		operator panel assembly. If incorrect,
		replace the engine board.

2-70Service Manual