Ricoh Pro 8300S - Buffer Pass Unit: Ctb_+24 Vint_Power Supply Error; Downstream Device Communication Error (Buffer Pass Unit); Sc618-02; Sc619-00

1.SC Codes
190
pin to reset.
 Circuit protector trip may be caused by fan/motor/harness or other components. Check if
any of these parts are defective, and then reset the circuit protector.
2. Replace the harness between the PSU and the control board, or reconnect the connector.
3. Replace the PSU.
4. Replace the control board.
SC618-02
Error Name
Buffer Pass Unit : CTB_+24VINT_Power Supply Error
Pattern
D
Error Condition
+24V power off (interlock power supply) is detected at the control board.
Major Cause
 Power of downstream unit is not turned on.
 If the control board LED 4 (+24V) is off with the door closed:
1. Harness between the interlock switch and control board is damaged or not connected properly.
2. Control board (relay) is defective.
 If the control board LED 4 (+24V) is lit with the door closed:
Control board is defective (SC detection error)
Solution
1. Replace the harness between the interlock switch and the control board, or reconnect the
connector.
2. Replace the control board.
SC619-00
Error Name
Downstream Device Communication Error (Buffer Pass Unit)
Pattern
D
Error Condition
Communication with the downstream unit failed.