Ricoh Pro 8300S - Sc721-27, 28, 30, 33

1.SC Codes
256
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.
SC721-27, 28, 30, 33
Error Name
 721-27: Punch Unit Movement Motor Error (Finisher SR5090/Booklet Finisher SR5100)
 721-28: Punch Registration Motor Error (Finisher SR5090/Booklet Finisher SR5100)
 721-30: Jogger Motor Error (Finisher SR5090/Booklet Finisher SR5100)
 721-33: Positioning Roller Shift Motor Error (Finisher SR5090/Booklet Finisher SR5100)
Pattern
 721-27: D
 721-28: D
 721-30: B
 721-33: B
Error Condition
 Home position is not detected within the specified time when moving to the home position. (The
first four times are reported as jams. An SC is issued when it is repeated five times.)
 Home position remains detected after a specified time after leaving the home position. (The first
four times are reported as jams. An SC is issued when it is repeated five times.)
Major Cause
 Power of downstream device is not turned on.
 Motor is defective
 Connector is not connected properly
 Short circuit
 Harness is damaged
 There is overload.
 HP sensor is defective.
Corresponding components:
 721-27:
Punch Unit Movement Motor [STM13]
Punch Unit HP Sensor [S40]
Controller Board
Punch Unit Controller Board
 721-28: