SC5xx: Paper Feed and Fusing
449
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC594-00 A Pressure roller thermistor (front) high temperature (hardware error)
Pressure roller thermistor (front) detects a temperature of 248 degrees C.
• Shorted triac
• Defective BiCU
• Defective fusing control system
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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