Lexmark 4200 Series manual Engine. Go to the Print engine removal on

4413-XXX

	FRU	Action
2	Carrier Transport	Check the motor for binds, or loose motor pulley.
	Motor	A noisy or chattering motor, or a motor that fails to
		turn, can be caused by:
		• An open or short in the motor
		• An open or short in the motor driver
		on the system board
		• A bind in the carrier transport
		mechanism
		With the carrier transport motor cable (CN3)
		disconnected from the system board, check for 0
		to 16 ohms between the following pins on the
		motor:
		CN3-2 and CN3-3
		If the readings are incorrect, replace the print
		engine. Go to the “Print engine removal” on
		page 4-16.
3	Carrier Guide Rod	Clean the carrier rod.
		Note: Lubricate the rod and the carrier rod bearing
		surfaces with grease P/N 99A0394.
4	Encoder Strip	Check the encoder strip for proper installation.
	Carrier Assembly	Also, check it for wear, dirt, and grease. Replace if
		needed.
	with Belt	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 carrier assembly with belt. Go to the “Carrier
		assembly with belt removal” on page 4-18. If
		problem remains, replace the system board. Go to
		the “System board removal” on page 4-19.
5	Carrier Transport	Check for worn, loose or broken parts. Check for
	Belt	obstructions blocking carrier movement. If pulley
	Idler Pulley	assembly is damaged, replace.
	Assembly	Lubricate carrier to carrier frame engagement with
		grease P/N 99A0394.

Diagnostic information 2-7