Lexmark 4069-XXX manual Turn the printer off. Remove

4069-XXX

	FRU	Action
1	Fuser Lamp (Incorrect	Install the correct voltage and
	Lamp/925 Service Error)	wattage lamp or fuser assembly.
2	Fuser Lamp	Remove the controller board. Run
		the Diagnostic Print Test and
		observe the lamp through the left
		side frame. If the lamp doesn’t come
		on, unplug the printer and check the
		continuity between the two pins on
		the fuser lamp cable going to the
		fuser assembly. If you do not
		measure continuity, remove the fuser
		assembly and check the continuity of
		the lamp. If incorrect, replace the
		lamp. If correct, replace the fuser
		cover assembly.
3	LVPS	Turn the printer off. Remove the
	LVPS to Fuser Auto	fuser assembly. Turn the printer
	Docking Connector	power on. Measure across the AC
	Fuser AC Cable	fuser cable pins for line voltage with
		the cable connected. If incorrect,
		turn the printer off and disconnect
		the power cord. Check the continuity
		of the LVPS to fuser AC cable. If
		incorrect, replace the cable. If
		correct, replace the LVPS.
4	Fuser Top Cover Assembly	Disconnect the thermistor cable from
	(Thermal Fuse/Thermistor	the fuser board at J2. The resistance
	Assembly)	is as follows:
		HOT - J2-1 - J2-2 = 2.5K ohms
		COLD = 150K ohms to 260K ohms

2-48Service Manual