Lexmark 4402-001 manual Service Checks, Carrier Transport Service Check

4402-001

Service Checks

Carrier Transport Service Check

	FRU	Action
1	System Board	Check the transport carrier motor connector J4. If
	Carrier Transport	connected, check for approximately 28 volts on
		pins 1 and 2 or at the wire connections located on
	Motor	the rear of the transport carrier motor. If voltage is
		incorrect, replace the system board. If voltage is
		correct, check the motor for shorts.
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 (J4)
		disconnected from the system board, check for 0
		to 10 ohms between the following pins on the
		motor:
		J4-1 and J4-2
		If the readings are incorrect, replace the print
		engine. Go to the “Print Engine Removal” on
		page 4-11.
3	Carrier Guide Rod	Clean the carrier rod.
		Note: Lubricate the rod and the carrier rod bearing
		surfaces with grease P/N 99A0394.

2-6Service Manual