Lexmark Printer, J110 Maintenance Station Service Checks, Pump. See Peristaltic Pump Removal on

4085-001

Maintenance Station Service Checks

	FRU	Action
1	Maintenance	The maintenance carrier is driven in a front to rear
	Station Assembly	motion by the maintenance stepper motor. A
		homing sensor is provided at the rear of the
		maintenance station to home the maintenance
		carrier during power up. Engine code software
		controls the step count from the home position to
		the various positions the maintenance carrier must
		move to accomplish the various maintenance
		tasks on the printheads. Utilizing cams and
		linkages, the various components on the
		maintenance carrier are actuated by the carrier
		motion.
		Check the maintenance carrier moves through its
		complete forward to back motion without binds.
		Check the maintenance station for worn, broken or
		dislodged parts.
		Check that the maintenance sensor is snapped
		securely into the maintenance station frame.
2	Maintenance	Check for approximately +1.8 V dc at pins 1, 2, 3,
	Motor Assembly	and 4 on connector (J3) on the engine board. If
		voltage is incorrect, replace the engine board. If
		voltage is correct, check connector and voltage at
		the motor. Check for a short in motor and for
		binds. If a short or bind is found, replace the
		motor.
3	Peristalic Pump	Check the hose connections. If okay, replace the
		pump. See “Peristaltic Pump Removal” on
		page 4-49 .
4	Maintenance	If the access door switch does not work or carrier
	Homing Sensor	does not move, check (J3) connector pin number 7
		for approximately +5 V. If voltage is correct, check
		connection at the sensor. If connection is good,
		replace sensor. See “Maintenance Sled Test” on
		page 3-33 .
5	Wiper	A worn wiper can cause degraded print quality just
		after a maintenance cleaning. Check for a loose or
		worn wiper.
6	Cap	A worn cap can cause the printhead nozzles to
		dry and clog. Check for a loose or worn cap.

Diagnostic Information 2-55