Oki C9850 Maintenance Manual page 197

-3 Paper feed Jam
• Immediately after turning ON the power, does a paper feed jam occur?
• YES
• NO
• YES
• YES
• YES
• NO Immediately after intaking the paper, does a paper feed jam occur?
• YES
• NO
• YES
• NO Does a paper feed jam occur when loading the paper?
• YES
• YES
• YES
• NO END
43627911TH Rev. 3
Does the paper jam occur at the IN 2 Sensor, WR Sensor or Exit Sensor?
YES Remove the jammed paper.
(A)
Does the lever of the IN 2 Sensor, WR Sensor or Exit Sensor work properly?
NO Replace the defective sensor lever.
Does the sensor (IN 2 Sensor, WR Sensor or Exit Sensor) work properly?
(Check the sensor output using the switch scan test in the self-diagnosis
mode.)
NO After checking the cable connection, replace the Sensor PCB (S2S
PWB).
Check the signal cable connection. (FSNS, DRV0 & DRV1 on the S2P
and DRV0, DRV1 & RSNS on the S2V PWB)
Are they connected properly?
NO Properly connect cable.
Replace the engine PCB.
Did the paper reach the WR sensor?
YES Go to (A).
Is the resist motor operating?
• NO Is the resist motor resistance the rated value at approx. 7.9Ω?
NO
• YES Check the gear bite, then replace the engine PCB.
Replace resist roller A or B.
Is the belt motor running?
• NO Is the resistance of the belt motor the rated level (4.7Ω)?
NO
• YES After checking the gear engagement and cable connection, re-
place the Motor Driver PCB (S2P).
Is ID rotating?
NO After checking the gear engagement, replace the ID.
After checking the gear engagement, replace the Belt Cassette Assy.
Replace the resist motor.
Replace the Belt Motor.
Oki Data CONFIDENTIAL
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