Ricoh IM C300

SC5xx: Paper Feed and Fusing
SM 6-45 D0CA/D0C9/D0C8/D0CB
Troubleshooting
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
6. Replace the PSU (AC) (PCB17).
7. Replace the fusing unit if all the above steps cannot resolve the issue.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC562-02 A Pressure Roller Thermistor (edge: center) (TH4) Cannot be Reloaded
SC562-12 D Pressure Roller Thermistor (edge: center) (TH4) Cannot be Reloaded
(Low Power)
Pressure Roller Thermistor (edge: center) (TH4) detects that the
temperature does not reach a temperature of 40 degrees C for 27 consecutive
seconds when the main power is turned on.
• Dirty or deformed Fusing Thermopile (TH1)
• Pressure Roller Thermistor (edge: center) (TH4) deformed or floating
• Input voltage out of specification (out of warranty)
• Fusing Thermostat open
1. Check the input voltage and replace the power plug (SC562-12 only).
2. Replace the Fusing Thermostat.
3. Replace the Fusing Sleeve Belt Assembly (fusing lamp).
4. Replace the Pressure Roller Thermistor (edge: center) (TH4).
5. Replace the BiCU (PCB1).
6. Replace the PSU (AC) (PCB17).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC563-00 A Pressure Roller Thermistor (edge: center) (TH4) Overheat (Software
Error)
Pressure Roller Thermistor (edge: center) (TH4) detects a temperature of 248
degrees C 10 times after the fusing relay is ON.
• Shorted triac
• Defective BiCU (PCB1)
1. Reconnect the connectors between the fusing drawer connector, BiCU
(PCB1), and Pressure Roller Thermistor (edge: center) (TH4).
2. Replace the harnesses between the BiCU (PCB1) and Pressure Roller
Thermistor (edge: center) (TH4).
3. Replace the BiCU (PCB1).
4. Replace the fusing unit if all the above steps cannot resolve the issue.