Ricoh Pro 8300S - Sc720-56; Turn Guide Motor Error

1.SC Codes
231
 720-53:
Booklet stapler bottom fence motor <STM14>
Booklet stapler bottom fence HP sensor <SN30>
 720-54:
Stack transport unit motor <STM09>
Stack transport unit HP sensor <SN20>
 720-55:
Booklet pressure release motor <STM10>
Booklet pressure release HP sensor <SN23>
Solution
1. Connector not connected properly
Check if the connectors between the main board of finisher SR5110/SR5120 and the motor are
connected correctly (whether they are disconnected or incorrectly connected).
Reconnect it if it is not connected correctly.
2. Damaged harness
Check if the harness between the main board of Finisher SR5110/SR5120 and the motor is
damaged or exposed.
Replace the harness if it is damaged.
3. Motor/sensor defective
Check if the motor or sensor is damaged or there are missing parts, whether the HP sensor turns
off and on, whether the motor rotates on its own, whether it is overloaded, and whether the drive is
transmitted.
Replace the motor or sensor.
4. Board defective
Replace the main board of Finisher SR5110/SR5120
* Before replacing the board, check if the SC occurs in the same way.
SC720-56
Error Name
Turn Guide Motor Error
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