Oki C9850 Maintenance Manual page 199

-5 Double-Side Print 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 Replace double-side printer unit.
43627911TH Rev. 3
Is there paper in the Double-Side Printer Unit?
YES Remove the paper jam.
(A)
Does the Sensor Lever of the Dup IN1 Sensor, Dup R Sensor, and Dup
F Sensor operate normally?
NO Replace the defective sensor lever.
Do the Dup IN1 Sensor, Dup R Sensor, and Dup F Sensor work properly?
(Check to see if these sensors are on the "no paper" level using the
switch scan test in the self-diagnosis mode.)
NO Check cable connection, and replace the defective sensor.
Check to see that the signal cable is connected.
Is it connected properly?
NO Properly connect cable.
Replace Double-Side Printer Control PCB (V72-2 PWB).
Did the paper reach the Dup R Sensor of the double-side printer?
• YES Has the paper reached the Dup F Sensor?
YES Go to (A).
• NO Is the Duplex Motor B running?
NO Replace the Duplex Motor B.
• YES Replace the PCB.
Double-Side Print Motor A operating?
• NO Is the double-side printer motor resistance a rated value of ap-
prox. 3.5 Ω?
NO Replace the double-side printer motor A.
• YES Check the gear bite, then replace the Double-Side Printer PCB
(V72-2 PWB).
Replace the Reverse Roller A or Feed Roller.
Oki Data CONFIDENTIAL
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