Lexmark 1020 manual Also check for loose or worn motor gear

4078-00X

	FRU	Action
2	Paper Feed 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 paper feed mechanism
		With the paper feed motor cable disconnected
		from the system board, check for 60 ohms (±15
		ohms) between the following pins on the motor:
		Pin 2 to Pin 5
		Pin 2 to Pin 6
		130 ohms (±20 ohms) between pins 5 and 6.
		If the readings are incorrect, replace the motor.
		Although the paper feeds in a forward direction
		only, the paper feed motor turns in two directions.
		If the paper feed motor turns in one direction only,
		replace the system board.
		Binds in the paper feed motor or gear train can
		cause intermittent false paper jam errors. Remove
		the paper feed motor and check the shaft for binds.
		Also check for loose or worn motor gear.
3	Drive Train	Check for binds in the gear train and paper feed
	Assembly	mechanism by removing the paper feed motor and
		rotating the large gear by hand. If you notice a
		bind, replace the drive train assembly. Check the
		feed clutch inside the large feed gear. Remove the
		sheet feeder. Turn the clutch gear and check that it
		rotates freely in one direction and locks when
		turned in the opposite direction.
4	Auto Sheet	Check the pick rollers for wear.
	Feeder
5	Mid Frame Asm	Check the following for wear:
	Access Cover	•	Friction wheels
	Asm
		•	Exit roller
		•	Star rollers
6	End-of-Forms	Check for binds or damage. If binds are found,
	Flag and Spring	replace the small feed roll bracket assembly.

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