Ricoh IM C300

SC5xx: Paper Feed and Fusing
SM 6-49 D0CA/D0C9/D0C8/D0CB
Troubleshooting
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC591-01 A Pressure Roller Thermistor (edge: front) (TH2) Disconnection
SC591-11 D Pressure Roller Thermistor (edge: front) (TH2) Disconnection (Low
Power)
Pressure Roller Thermistor (edge: front) (TH2) detects a temperature of -20
degrees C or below for 29 consecutive seconds when the fusing lamp is
activated.
• Disconnected or defective Pressure Roller Thermistor (edge: front) (TH2)
• Connector contact failure
1. Check the input voltage and replace the power plug (SC591-11 only).
2. Reconnect the connectors between the fusing unit, fusing drawer
connector, and BiCU (PCB1).
3. Replace the Pressure Roller Thermistor (edge: front) (TH2).
4. Replace the harnesses between the BiCU (PCB1) and Pressure Roller
Thermistor (edge: front) (TH2).
5. Replace the BiCU (PCB1).
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)
SC592-02 A Pressure Roller Thermistor (edge: front) (TH2) Cannot be Reloaded
SC592-12 D Pressure Roller Thermistor (edge: front) (TH2) Cannot be Reloaded (Low
Power)
The machine temperature does not reach a temperature of 45 degrees C
when 100 seconds passes after starting a job where the paper width is wider
than 206 mm AND is equal or smaller than 216 mm.
• Dirty or deformed Pressure Roller Thermistor (edge: front) (TH2)
• Input voltage out of specification (out of warranty)
• Fusing Thermostat open
1. Check the input voltage and replace the power plug (SC592-12 only).
2. Replace the Fusing Thermostat.
3. Replace the Fusing Sleeve Belt Assembly (fusing lamp).
4. Replace the Fusing Thermopile (TH1)
5. Replace the BiCU (PCB1).
6. Replace the PSU (AC) (PCB17).