Ricoh Pro 8300S - Positioning Roller Motor Error; Sc721-34

1.SC Codes
257
Punch Registration Motor [STM14]
Punch Registration HP Sensor [S41]
Controller Board
Punch Unit
Controller Board
 721-30:
Jogger Motor [STM1]
Jogger Fence HP Sensor [S25]
Controller Board
 721-33:
Positioning Roller Shift Motor [STM5]
Positioning Roller HP Sensor [S28]
Controller Board
Solution
1. Motor/sensor defective
Check the motor (whether it rotates on its own, whether its drive is transmitted, or if it is
overloaded). Check if the sensor turns off and on.
If the motor or sensor is not good, replace it.
2. Connector not connected properly
Check all the connectors of each motor and sensor are correctly connected. (controller board,
motor, sensor, relay)
Reconnect the connector if it is not connected correctly.
3. Harness damaged
Check if the harness between the controller board and the motor/sensor 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. if so, replace it.
SC721-34
Error Name
Positioning Roller Motor Error (Finisher SR5090/Booklet Finisher SR5100)
Pattern
B
Error Condition
DC motor control error is detected. ( (The first four times are reported as jams. An SC is issued when it
is repeated five times.))