Ricoh Pro 8300S - Sc721-82, 83

1.SC Codes
271
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.
SC721-82, 83
Error Name
 721-82: Leading Edge Guide Motor Error (Finisher SR5090/Booklet Finisher SR5100)
 721-83: Paper Guide Motor Error (Finisher SR5090/Booklet Finisher SR5100)
Pattern
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.
 Home position sensor defective
Corresponding components:
 721-82:
Leading Edge Guide Motor [STM6]
Leading Edge Guide HP Sensor [S33]
Controller Board
 721-83:
Paper Guide Motor [STM18]
Paper Guide HP Sensor [S50]