Error Name/Error Condition/Major Cause/Solution
• Fusing unit defective
1. Check that no paper jam is present.
2. Reconnect the following connectors.
• Fusing Unit – Fusing Thermistor Connection PCB connector
• Fusing Thermistor Connection PCB – IOB (PCB17) connector
3. If the connector is broken, shorted, or grounded, replace the connector.
4. Replace the fusing unit.
• Fusing thermistor connection PCB defective
Replace the fusing thermistor connection PCB.
• IOB (PCB17) defective
1. Update the engine software to the latest version.
2. Replace the IOB (PCB17).
• Fusing thermistor (center) defective
Replace the fusing unit.
• Fusing thermostat defective
1. Reconnect the following connector.
• Fusing Unit – PSU (PCB18) connector
2. If the connector is broken, shorted, or grounded, replace the connector.
3. Replace the fusing unit.
• PSU (PCB18) defective
Replace the PSU (PCB18).
Error Name/Error Condition/Major Cause/Solution
Fusing Thermistor (Center) High Temperature
• The fusing thermistor (center) (TS2) detects the temperature that exceeds 245
degrees C.
• The fusing thermistor (center) (TS2) detects the temperature that exceeds 195
degrees C in a heater-off state after the fusing thermistor (center) (TS2)
detects the temperature of 155 degrees C or less.
• Connector pin defective
• Triac defective
• Fusing thermistor defective
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