Lexmark 4059-XXX manual Auxiliary Fan Service Check, Fan does not run or is noisy

4059-XXX

Fan Service Check

Auxiliary Fan Service Check

The auxiliary fan is in models 2420, 2450, 2455 and 3455.

Fan does not run or is noisy.

	FRU	Action
1	Fan Assembly	Check the fan for proper installation
		and for excessive noise. If incorrect,
		replace the fan and cable assembly.
2	Engine Board	Check to make sure the auxiliary fan
		cable is seated on connector J7 on
		the engine board. If correct, check
		for +24 V dc on J7-1 on the engine
		board. If incorrect, replace the
		engine board. If correct, replace the
		fan assembly.
		Note: When the printer is in warm-
		up the voltage at J7-1 measures
		approximately +12 V dc. When the
		printer is running, the voltage
		measures approximately +24 V dc.

Main Fan Service Check

Check the cable connections at J1 on the engine board and at the main fan assembly. The main fan runs continuously when the printer is powered on unless the printer is in the Power Saver mode.

	FRU	Action
1	Main Fan	Manually spin the fan and check that
		it rotates freely. Check the cable
		connection to the engine board, J1
		for correct installation.
2	Main Fan to Engine Board	Check the continuity of the cable. If
	Cable	incorrect, replace the cable.

2-474059 Service Manual