Ricoh Pro 8300S - Sc721-03

1.SC Codes
251
SC721 to 725
SC721-03
Error Name
Overcurrent Protection Device Error 1 (Finisher SR5090/Booklet Finisher SR5100)
Pattern
D
Error Condition
Break in the protection device (Controller Board FU3) is detected. (The fuse is broken)
Major Cause
 Power of the downstream device is not turned on.
 Motor defective
 Harness is damaged.
 Board is damaged.
Related Components:
 Motors (except for Front Fence Motor, Rear Fence Motor, Fence Lift Motor),
 Sensors (except for Front Fence Sensor, Rear Fence Sensor, Lift Sensor 1 and 2)
 All harnesses
 Controller Board
 Punch Unit Controller Board
Solution
1. Motor defective
Check whether the motor's drive is transmitted to other components, or whether the motor is
overloaded.
Replace the motor if it is not in good condition.
2. Connector not connected properly
Check all the connectors of each motor and sensor are properly connected. (controller board,
punch unit board, motor/sensors, relay)
Reconnect the connector if it is not connected correctly.
3. Damaged harness
Check if the harness between each motor/sensor and the board (controller board, punch unit
board), and the harness between the controller board and the jogger unit main board is damaged
or exposed.
Replace the harness if it is damaged.
4. Board defective
Check if there are any traces of short circuit on the controller board, punch unit board.