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Service Guide OL400
Chapter 4 Failure & Repair Analysis
RAP 03:Paper Jam Alarm
START
Does the paper jam occur when the power is turned ON?
NO
Go to A
YES
Is the paper at the resist or exit sensor?
YES
Remove the paper.
NO
Will the exit sensor on the engine controller circuit board toggle ON and
OFF (check on the engine controller circuit board IC3 pin 3)?
YES
Check the outlet sensor lever for normal operation.
NO
Replace the engine controller circuit board.
A
Is the resist roller rotating?
NO
Check the planetary gearing of the paper feed assembly (replace paper feed
assembly, if necessary).
YES
Has the paper reached the exit sensor?
YES
Go to B
NO
Is the main motor rotating?
NO
Are the main motor contacts touching the engine controller circuit
board?
NO
Ensure good contact.
YES
Replace the engine controller circuit board or the main
motor.
Is the fuser unit rotating?
NO
Check the gearing.
YES
Go to B