Lexmark 4402-001 Assembly Print Engine Removal on, To the Maintenance Station Removal on

4402-001

	FRU	Action
4	Encoder Strip	Check the encoder strip for proper installation.
	Carrier with PCB	Also, check it for wear, dirt and grease.
	Assembly	Be sure all printhead connectors are fully seated.
		Check the cables for damage.
		If the encoder strip and all connections are okay,
		but the carrier still slams the side frame, replace
		the print engine. Go to the “Print Engine
		Removal” on page 4-11.
5	Carrier Transport	Check for worn, loose or broken parts. Check for
	Belt	obstructions blocking carrier movement.
	Idler Pulley Parts
	Carrier Frame	Check the carrier belt idler pulley mounting screw.
		Loosen the screw and allow the tension spring to
		take up any slack in the belt. Tighten the screw. If
		the pulley mounting bracket has reached the stop,
		replace the belt. Go to the “Belt/Idler Pulley
		Assembly (Print Engine) Removal” on
		page 4-14.
		Lubricate carrier to carrier frame engagement with
		grease P/N 99A0394.
6	Printhead Carrier	Disconnect the printer and check the carrier
	Assembly	printhead connector (J2). If the connection is
		good, remove the printhead carrier and check the
		cable connection to the home sensor board. If the
		problem remains, replace the system board. Go to
		the “System Board Removal” on page 4-12.
7	Maintenance	A problem with the maintenance station can cause
	Station	carrier movement problems at the right margin. Go
		to the “Maintenance Station Removal” on
		page 4-14.
8	Access Cover	If the carrier does not move toward the cartridge
	Sensor	load position when the access cover is opened,
		verify that power is on. If the carrier still does not
		move, check connector J9 pin 1 for approximately
		5 volts, with the cover closed. If the voltage is
		correct, replace the sensor. Go to the “Access
		Cover Sensor Removal” on page 4-6. If the
		voltage is incorrect, replace the system board. Go
		to the “System Board Removal” on page 4-12.

Diagnostic Information 2-7