Lexmark 5016-001 manual CN401

5016-001

	FRU	Action
5	LVPS Fuses	Check the AC line voltage on the LVPS at
	F401, F402	connectors CN404 and CN405.
	either or both	•	If incorrect, go to step 6.
	continue to blow	•	If correct, disconnect the cables to CN401,
	after being
			CN402 and CN403.
	replaced.
	(Continued)	Check the voltage at CN401 pin 1 or 2. The
		voltage should measure approximately +5 V dc.
		•	If incorrect, replace the LVPS.
		• If correct, reconnect the cable to CN401 and
			recheck the voltage. If incorrect, go to step 6.
			• If correct, reconnect the cable to CN402
			and recheck the voltage. If incorrect, go to
			step 7.
			• If correct, reconnect the cable to CN403
			and recheck the voltage. If incorrect, go to
			step 8.
			CN401
			Pin 1, Pin 2 Approximately +5 V dc
			Pin 3, Pin 4	Ground
			Pin 5	Fuser On
			CN402
			Pin 1, Pin 2 Approximately +5 V dc
			Pin 3, Pin 4	Ground
6	LVPS Fuses	The problem might be with the following:
	F401, F402	•	Interconnect board.
	either or both
		•	Any option installed on the interconnect
	continue to blow
			board.
	after being
		•	Controller board.
	replaced.
		• COS.
	(Continued)
		• Memory DIMM installed on the controller
			board.
		Remove and replace one FRU at a time until
		you find the failing component.
7	LVPS Fuses	The problem might be with the following:
	F401, F402	• Engine board
	either or both
		• Any sensor or motor connected to the engine
	continue to blow
			board.
	after being
	replaced.	Remove and replace one FRU at a time until
	(Continued)	you find the failing component.

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