SC5xx: Paper Feed and Fusing
448
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
consecutive seconds when the fusing lamp is activated.
• Thermistor disconnection
• Loose connector
1. Reconnect the connectors between the fusing unit, fusing drawer connector, and BiCU.
2. Replace the thermistor.
3. Replace the fusing unit.
4. Replace the harnesses between the BiCU and the fusing drawer connector.
5. Replace the BiCU.
6. Replace the PSU (AC).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC592-02 A Pressure roller thermistor (front) cannot be reloaded
SC592-12 D Pressure roller thermistor (front) cannot be reloaded (low power)
The machine temperature does not reach a temperature of 50 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 thermistor
• Input voltage out of specification (out of warranty)
• Thermostat blown out
1. Check the input voltage and replace the power plug.
2. Replace the fusing thermostat
3. Replace the fusing lamp.
4. Replace the thermistor.
5. Replace the BiCU.
6. Replace the PSU (AC).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC593-00 A Pressure roller thermistor (front) high temperature (software error)
Pressure roller thermistor (front) detects a temperature of 248 degrees C for consecutive 10
times when the fusing lamp is activated.
• Shorted triac
• Defective BiCU
1. Reconnect the connectors between the fusing unit, fusing drawer connector, and BiCU.
2. Replace the thermistor.
3. Replace the harnesses between the BiCU and the fusing drawer connector.
4. Replace the BiCU.
Replace the fusing unit if all the above steps cannot resolve the issue.
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