Ricoh Pro 8300S - Sc547-02; Sc547-03; Zero Cross Error (Low Frequency Error); Zero Cross Error (Relay Point Defective)

1.SC Codes
166
SC547-02
Error Name
Zero Cross Error (Relay Point Defective)
Pattern
D
Error Condition
Commercial frequency cannot be detected even though AC power is supplied to the fusing unit.
Major Cause
 Connector set defective
Connector of the AC control board and IOB are not connected.
 AC control board defective
Fusing relay is damaged (gap in relay)
 IOB defective
Drive circuit failure in the fusing relay
 Harness between AC control board and IOB defective
Harness is damaged, or there is grounding fault.
Solution
1. Connector set defective
Make sure that the harness between the AC control board and IOB is not slanted.
2. Replace the AC control board.
3. Replace the IOB.
4. Replace the harness between the AC control board and IOB.
SC547-03
Error Name
Zero Cross Error (Low Frequency Error)
Pattern
D
Error Condition
Commercial power supply is detected to be 44 Hz or less.
Major Cause
Check the frequency of the commercial power supply
It could be that the frequency is unstable