LEXMARK 1000,1100 Color Je
Manual de Servicio

4096-00X

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:

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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 1 System Board

Action 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 N7 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. 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 N7 disconnected from the system board, check for 80 ohms (±7 ohms) between the following pins on the motor: Pin 1 to Pin 2, Pin 1 to Pin 4 160 ohms (±7 ohms) 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 binds. Also check for loose or worn motor gear.

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Paper Feed Motor

2-8 Service Manual