Ricoh PRO C7210X - Paper jam when using thick paper

1.SC Codes
231
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
 Replace the slave control board.
 Replace the motor harness.
 Replace the sensor harness.
 Clear the signature jam.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC751-39
D
Perfect Binder: Trim unit entrance sensor lag error
 At the end of initialization at power on, the entrance path sensor went ON.
 At the end of automatic exit, the entrance path sensor went ON.
 Trim unit entrance sensor connector, loose, broken, defective
 Reconnect the connector.
 Replace the entrance path sensor.
 Replace the cutter control board.
 Replace the sensor harness.
 Clear the signature jam.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC751-40
D
Perfect Binder: Book registration sensor lag error
Book registration sensor:
 Detected ON at the end of initialization after power on.
 Detected ON at the end of automatic exit operation.
 Detected ON at the end of book binding and automatic exit.
 Could detect no stack at fore edge cutting.
 Detected ON at end of grip operation during book binding.
 Book registration sensor connector loose, broken, defective
 Sensor defective at the lift tray
 Reconnect the connector.
 Replace the book registration sensor.
 Replace the cutter control board.
 Replace the sensor harness.
 Clear the signature jam.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC751-41
D
Perfect Binder: Book arrival sensor lag error
Not detected
 Book arrival sensor connector loose, broken, defective
 Sensor defective