Lexmark 4069-XXX manual Check the fuse on the HVPS. If

4069-XXX

	FRU	Action
2	High Voltage Contact	Check the PC drum contact on the
		right side frame for damage, PC
		drum contact wear or contamination.
		If the contact is bent or damaged,
		replace the contact.
		Note: Inspect the HVPS PC drum
		contact on the board for any signs of
		damage or contamination.
3	HVPS	Check the fuse on the HVPS. If
		open, replace the HVPS. Check the
		voltages at J10 on the engine board.
		Measure the following voltages from
		connector J10 to printer ground:
		Printer Idle
		J10-5 measures +24 V dc
		Printer Printing
		J10-5 measures +24 V dc
		In the voltages at J10-5 are
		incorrect, replace the engine board.
4	Front Cable Harness	Check the front cable harness at J10
	HVPS Section	on the engine board and at CN1 on
		the HVPS to make sure the harness
		is connected properly. If connected
		properly, check the continuity of the
		cable harness. If there is no
		continuity, replace the front cable
		harness.
5	Printhead Assembly	Generally a 93x service error is
		posted if the printhead assembly
		fails and the printer does not give a
		blank copy symptom.
		The printhead used in the printer
		does not have a mechanical shutter
		as previous laser printers. The
		printer is interlocked through the
		front top cover interlock switch.

2-94Service Manual