Ricoh AP-C3, Field Service Manual, Page: 819 / 1334

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
555 A
Fusing Heater error: End
The fusing heater keeps full power for 19 seconds or more.
• Defective thermistors
• Disconnected cables
1. Replace the thermistors.
2. Check and replace the cables.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
557 C
Zero cross frequency error
When the zero cross signal is 66 or more and it is detected 10 times or more in
11 detections, the machine determines that input 60 Hz and SC557 occurs.
• Noise (High frequency)
• Defective AC control board
1. Check the power supply source.
2. Replace the AC control board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
559 A
Consecutive fusing jam
The paper jam counter for the fusing unit reaches 3 times. The paper jam counter
is cleared if the paper is fed correctly.
This SC is activated only when SP1-159-001 is set to "1" (default "0").
• Paper jam in the fusing unit.
Remove the paper that is jammed in the fusing unit. Then make sure that the fusing
unit is clean and has no obstacles in the paper feed path.
Service Call
817