Ricoh Pro 8300S - Page 261

1.SC Codes
253
repeated five times.)
Major Cause
 Power of downstream unit is not turned on.
 Motor is defective.
 Connector is disconnected.
 Short circuit
 Harness is damaged.
 Motor is overloaded.
Corresponding components:
 721-10: Entrance Transport Motor [DCM1], Controller Board
 721-11: Horizontal Transport Motor [DCM2], Controller Board
 721-13: Transport Motor [DCM3], Controller Board
 721-15: Pre-stack Transport Motor [DCM5], Controller Board
 721-17: Exit Motor [DCM4], Controller Board
Solution
1. Motor defective
Check whether the motor rotates on its own, whether it is overloaded, and whether the drive is
transmitted.
Replace the motor if it is not in good condition.
2. Connector not connected properly
Check all the connectors between the controller board and the motor are correctly connected. (not
disconnected or half-inserted)
Reconnect the connector if it is not connected correctly.
3. Harness damaged
Check if the harness between the controller board and the motor is damaged or exposed.
Replace the harness if it is not in good condition.
4. Board defective
Check if there are any traces of short circuit on the controller board.
5. Replace the board.
SC721-20, 24
Error Name
 721-20: Lower Junction Gate Motor Error (Finisher SR5090/Booklet Finisher SR5100)
 721-24: Paper Exit Guide Plate Motor Error (Finisher SR5090/Booklet Finisher SR5100)
Pattern
B