Ricoh Pro 8300S - Sc587-01; Sc590-01; Stepper Motor Error (RYB Board); Thermistor Error

1.SC Codes
183
 Harness is damaged.
 DDRB, IOB is defective.
Solution
1. Check if the decurl uni is overloaded. (foreign objects in the unit, bearing locked or stuck)
2. Check the connector of sensor (connector floating or disconnected)
3. Replace the decurl unit HP sensor (SEN67).
4. Replace the decurl limit sensor (SEN68).
5. Replace the harness.
6. Replace the DDRB.
7. Replace the IOB.
SC587-01
Error Name
Thermistor Error
Pattern
C
Error Condition
Main machine thermistor (SEN94) error is detected.
Major Cause
 Abnormal temperature is detected.
 Thermistor cable is defective.
 Main machine thermistor (SEN94) is defective.
Solution
1. Disconnect and reconnect the connector of the thermistor cable.
2. Replace the main machine thermistor (SEN94) is defective.
SC590-01
Error Name
Stepper Motor Error (RYB Board)
Pattern
D
Error Condition
The stepper motor controlled by the relay board (RYB) has failed.