Oki Data CONFIDENTIAL
42049001TH Rev.1 80 /
4 Image Drum Unit (ID) Up/Down Operation Error
• Power the printer off and, after a few seconds, on again.
• Are all the ID drums properly revolving during printing?
• NO Does the ID motor (C) have a rated resistance (approx. 3.5Ω)?
NO Replace the ID motor(C).
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• YES Is 24V being output to the F1 of the engine board?
NO Replace the low voltage power unit.
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• YES Replace the engine board after checking cable connection.
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• YES Is ID up-and-down operation being performed (is the operation performed by ID UP/DOWN
on motor and clutch testing)?
NO Replace the gear assys - planet L and R.
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• YES Does the ID up/down sensor work properly? (Check the signals on the high voltage power
unit CN3, pin 2.)
Are: 5V with the sensor light unshielded; and
0V with sensor light shielded
being output?
NO Replace the high voltage power unit.
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• YES Replace the engine board after checking the cable connection between the high voltage
power unit and the engine board (RSN PWB)
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