Oki C9850 Maintenance Manual page 201

Image Drum Unit up/down movement error
• Check the ID up/down movement using the motor & clutch test in the self-diagnosis mode.
• Does the ID moves up and down?
• YES
• NO
• YES
• NO
• YES Is the C-ID Motor running properly?
• NO
• NO
• YES Check the engagement of the planet gear and replace the Planet Gear Unit (Planet-
Assy-F and Plane-Assy-R).
43627911TH Rev. 3
Check using the switch scan test in the self-diagnosis mode. Does the
Up/Down Sensor work properly?
YES Replace the defective IDU Motor.
Is the Engine PCB (S2V PWB) connected properly to the ID Sensor PCB
(SGG PWB)?
NO Connect them properly.
Make sure that the Up/Down Sensor is fastened securely and then re-
place the ID Sensor PCB.
Is the error reset?
YES End
Replace the Engine PCB.
Does the motor rotate in one direction only?
• YES Is the problem solved by reconnecting the FFC to the Engine
PCB and the Motor Driver PCB and the CID connectors?
YES End
• NO Is the problem solved by replacing the C-ID Motor?
YES End
• NO Replace the Engine PCB.
After checking the gear engagement and ensuring that any connector is
not tilted, replace the C-ID Motor.
Oki Data CONFIDENTIAL
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