Ricoh D143 Field Service Manual page 821

No. Type
Pressure roller overheat: End (hardware error)
The thermistor detects 220°C or more.
• Defective AC control board
• Defective IOB
• Defective IPU
• Defective fusing control system
1. Replace the AC control board.
564 A
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
Pressure roller contact sensor error
Pressure roller contact sensor does not detect the pressure roller position three
times.
• Broken or defective pressure roller contact sensor
569
• Deformed or broken pressure roller contact sensor feeler
D
-00
• Defective pressure roller contact motor
• Defective fusing unit
1. Check or replace the harness of the pressure roller contact sensor.
2. Replace the pressure roller contact sensor.
3. Replace the pressure roller contact motor.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Service Call
819