Ricoh D143 Field Service Manual page 815

No. Type
Heating roller overheat: Center (hardware error)
During stand-by mode or a print job, the detected heating roller temperature
reaches 220°C.
• Defective AC controller board
• Defective IOB
• Defective IPU
• Defective fusing control system
Related SC code: SC 543
544 A
1. Replace the AC controller board.
2. Replace the IOB.
3. Replace the IPU.
4. Replace the fusing unit and reset the counter of the fusing unit using
SP3-902-014.
Important: The fusing unit cannot be used because an abnormal high temperature
was detected.
After this SC occurs, the counter reset of the fusing unit should be done manually
using SP3-902-014 because the counter reset is not done automatically.
No. Type
Fusing Heater error: Center
The fusing heater keeps full power for 23 seconds or more.
• Defective thermistors
545 A
• Disconnected cables
1. Replace the thermistors.
2. Check and replace the cables.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Service Call
813