Lexmark 4076-0XX manual Maintenance Station Service Check

4076-0XX

Maintenance Station Service Check

The maintenance station has two functions:

1.Cleans the print head nozzles during the print operation.

2.Seals the print head when it is not being used to prevent the noz- zles from drying..

	FRU OR PROCEDURE	ACTION
1	Maintenance Drive Assem-	Disconnect J4 from the system board.
	bly	Check for 18 ohms (±4 ohms) between
		pins 1 and 2 at the motor. If the reading
		is incorrect, replace the maintenance
		drive assembly,
		Check for motor pins shorted to the
		motor housing. If you find a shorted pin,
		replace the maintenance drive assem-
		bly. If the symptom remains, replace the
		system board.
		A bind in the drive assembly can prevent
		the motor from turning. Check for binds
		and loose or worn parts in the drive
		assembly. Also check the motor gear
2	System Board	Turn the printer off and disconnect J4
		from the system board. Turn the printer
		on and check for a pulse of 15 V dc
		between J4-1 and ground on the system
		board as the printer goes through
		POST.
3	Maintenance Rocker Am.	Check for binds or wear.
4	Wiper	A worn wiper will cause degraded print
		quality just after a maintenance clean-
		ing. Check for loose or worn wiper.
5	Cap	A worn cap will cause the print head
		nozzles to dry and clog. Check for loose
		or worn cap.

Note: if the failure remains, replace the system board

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