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RAP 04: Paper Feed Service Check
Does the machine have paper jam problems?
YES Perform the following procedures in the listed order. Check the operation of the unit between
each step.
Check the entire paper path for obstructions.
Be sure that the sheet feeder is properly loaded. Be sure that there is not too much paper
loaded.
Be sure that the paper being used meets specifications.
Service Handbook for paper specifications
Check for static cling in the paper.
NO Perform the numbered checks in the listed order.
Check the operation of the unit between each step.
1. Check the system board.
Check for + 24 vdc between J5-3 and ground and between J5-4 and ground on the
system board.
If the voltage is not present, check for motor pins shorted to the motor housing. Replace
the motor if you find a shorted pin.
If the problem is not resolved, replace the system board.
2. Check the 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.
Check for 100 ohms (+/- 20 ohms) between the following pins on the paper feed motor.
Disconnect J5.
Power ON the unit.
Pin 1 to Pin 4
Pin 2 to Pin 4
Pin 3 to Pin 5
Service Guide OJ2010
Chapter 4 Failure and Repair Analysis
.
Refer to Section 1 of this
Page: 132
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