Ricoh Pro 8300S - Sc502-02; Tray 2 Bottom Plate Lowering Error

1.SC Codes
91
Major Cause
 Bottom plate is stuck.
 Connector is not connected properly.
 Pickup roller lift sensor (Tray 2) (SEN36) is damaged.
 Pickup roller solenoid (Tray 2) (SOL2) is damaged.
 Tray lift motor (Tray 2) (BM2) is damaged.
 Harnesses are damaged.
 RYB, IOB are defective.
Solution
In addition to checking for sensor/actuator defect by eye, also execute Input/Output Check as
necessary.
1. Check if the Tray 2 bottom plate moves.
2. Check the connectors of the harnesses related to upper limit detection (pickup roller lift sensor
(Tray 2) (SEN36) / pickup roller solenoid (Tray 2) (SOL2)) .
Reconnect the connectors.
3. Check the electrical components related to upper limit detection (pickup roller lift sensor (Tray 2)
(SEN36) / pickup roller solenoid (Tray 2) (SOL2) / tray lift motor (Tray 2) (BM2)).
If they are defective, replace the components.
4. Check the harnesses (pickup roller lift sensor (Tray 2) (SEN36) / pickup roller solenoid (Tray 2)
(SOL2)).
If the harnesses are defective, replace the harnesses.
5. Replace the RYB.
6. Replace the IOB.
SC502-02
Error Name
Tray 2 Bottom Plate Lowering Error
Pattern
B
Error Condition
An error is detected when lowering Tray 2 (three times consecutively).
Major Cause
 Bottom plate is stuck.
 Connector is not connected properly.
 Pickup roller lift sensor (Tray 2) (SEN36) is damaged.