Ricoh MP C6502SP Field Service Manual page 1140

5. Troubleshooting
SC No.
SC547-03
SC No.
SC548
D135 RTB 47
D137 RTB 65
D137 RTB 198
D135 RTB 158
SC548-00
1138
Level Error Name/Error Condition/Major Cause/Solution
Zero Cross Error (low frequency error)
When this error occurs, the fusing heater trigger turns off and then, after a
specified time, machine stops with fusing relay off and displays the SC.
• Unstable commercial power supply frequency
D
• Turn the main power off/on.
• If the fusing relay is damaged, replace the AC control board.
• Check the connection between the AC control board and the FSB
(fusing IOB) and replace the harness and/or circuit board if
necessary.
Level Error Name/Error Condition/Major Cause/Solution
Fusing rotation detection
Blocking/non-blocking signal of the heating roller rotation sensor was
not received within specified time.
• The feeler for heating roller rotation detection deformed or broken.
A
• Fusing motor defective
• Heating roller rotation sensor defective
• IOB defective
• After removing the cause of the SC, set "Fusing SC Clear" in the SP
mode, and then turn the main power off/on.