Ricoh Pro 8300S - Fusing Motor Error; Sc520-00

1.SC Codes
155
Error Condition
The status of the contact sensor does not change when the contact motor is running.
Major Cause
 Power of the downstream unit is not turned on
 A3 LCT contact motor is defective or not connected properly.
 Contact sensor is defective or not connected properly.
 Harnesses are damaged.
 PCB is defective.
Solution
In addition to checking for sensor/actuator defect by eye, also execute Input/Output Check as
necessary.
1. Check the connectors of the harnesses (contact sensor / A3 LCT contact motor).
Reconnect the connectors. Turn the main power OFF and then ON.
2. Check the contact sensor.
If it is defective, replace it. Turn the main power OFF and then ON.
3. Check the A3 LCT contact motor.
If it is defective, replace it. Turn the main power OFF and then ON.
4. Check the harnesses (contact sensor / A3 LCT contact motor).
If the harnesses are defective, replace the harnesses. Turn the main power OFF and then ON.
5. Replace the PCB. Turn the main power OFF and then ON.
SC520-00
Error Name
Fusing Motor Error
Pattern
D
Error Condition
Fusing Motor (BLM9) error is detected.
Major Cause
Motor Lock Signal Criteria:
 Rpm of the motor deviates from the target value by more than ±5%: not the rated rotation.
 Rpm of the motor deviates from the target value by less than ±5%: rated rotation.
Solution
1. Check if the fusing unit is overloaded. (foreign object, bearing lock, fixation)