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Service Guide OL400
Chapter 4 Failure & Repair Analysis
RAP 09:Blank Output
START
Is the transfer wire broken?
YES
Replace the transfer wire
NO
Replace the high voltage power supply unit.
If the problem still exists, run the Engine Test (
See Section 4.7 of the Service Handbook){
}.
Are horizontal ruled lines output?
YES
Replace the main controller circuit board.
NO
Is the LED head connected properly? (Check for good contact.)
NO
Connect the LED head properly.
YES
Is the image drum cartridge connected to the ground?
NO
Clean the ground contact of the image drum cartridge.
YES
Replace the engine controller circuit board.
Has the trouble been removed?
YES
END
NO
Replace the LED head.
Has the trouble been removed?
YES
END
NO
Replace the image drum cartridge.
END
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