Lexmark 4090-001 manual Print Quality Service Check

4090-001

Print Quality Service Check

	FRU	Action
1	Print Cartridge	Be sure the printer contains good print cartridges.
2	Printhead Carrier	Reseat the printhead cables in the system board
	Assembly	and check the following parts for wear or damage:
		•	Print Cartridge Latch
		•	Latch Spring
		•	Carrier
3	System Board	•	Perform the ’Test Page’ on page 3-7. Look for a
			break in the diagonal line of the test pattern. A
	Printhead Cable		broken line indicates one or more print nozzles
	Rubber Backer		are not working. Run the test again to verify the
			failure. If there are even breaks in the diagonal
			line similar to the pattern shown below, replace
			the system board.
		If there is a single break or random breaks in the
		diagonal line check the following:
		• Check the gold-plated contacts, on the end of
			the cable that connect to the carrier, for dirt and
			wear. Use only a clean dry cloth to clean the
			contacts. Also check the cable for damage. You
			may need to remove the cable from the carrier
			to inspect it.
		• A worn rubber backer results in poor contact
			between the printhead cable and the print
			cartridge. Check the rubber backer for wear.
4	Maintenance	Intermittent nozzle failures can be caused by worn
	Station	parts in the maintenance station. Perform the
		’Maintenance Station Service Check’ on page 2-7,
		then return to this check.

Diagnostic Information 2-12