Sharp UX-2200CM, FO-2150CM technical manual Paper Feed Service Check

UX-2200CMU/CMC

FO-2150CMU/CMC

4. Paper Feed Service Check

If your machine does not have paper jam problems, continue with the service check. If your machine does have a paper jam problem,examine it for the following before you begin the service check:

•	Check the entire paper path for obstructions.
•	Be sure there is not too much paper in the sheet feeder.
•	Be sure the correct type of paper is being used.
•	Check for static in the paper.
	FRU	Action
1	System Board	Turn the printer on and verify the paper feed motor activates. Be sure
		the end-of-form sensor lever is in the down position. Turn the printer off
		and disconnect CN1 from the system board. Check for motor pins
		shorted to the motor housing. If you find a shorted pin,replace the
		paper feed motor. If you still have a failure after replacing the paper
		feed motor,replace the system board.
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,or a bind in the paper feed mechanism. With the
		paper feed motor cable CN1 disconnected from the system board,
		check for 140 ohms(±7%)between the follwing pins on the motor
		: Pin 1 to Pin 2,Pin 1 to Pin 4
		280 ohms(±7%)between pins 2 and 4. If the readings are
		incorrect,replace the paper feed motor and drive train assembly.
		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 bins.
		Also check for loose or worn motor gear.
3	Drive Train Assembly	Check for binds in the gear train and paper feed machanism by remov-
		ing 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
		gear on the left side of the auto 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 Feeder	Check the pick rollers for wear.
5	Mid-Frame Asm	Check the following for wear:
	Access Cover Asm
		• Exit roller
		• Star rollers
6	End-of-Forms Flag	Check for binds or damage. If binds are found,replace the end-of-forms
	and Spring	flag.
7	End-of-Forms Sensor	Check the sensor for birt. Be sure the sensor lever is in the down
		position. If the failure remains,replace the system board.

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