Lexmark 3000 Color Jetprinter, Руководство по обслуживанию

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2-8
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 Unplug the printer and disconnect CN3 from the
system board. Plug the printer in and check for a
pulse of 24 V dc between CN3-1 and ground and
CN3-2 and ground on the system board. If the
voltage is not present, check for motor pins
shorted to the motor housing. If you find a shorted
pin, replace the motor. If you still have a failure
after replacing the 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
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.