Service Call 501-582
SC No.
Type
D255/D256/M281/M282
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
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 defective
1. Update the engine software to the latest version.
2. Replace the IOB.
Fusing thermistor (center) defective
Replace the fusing unit.
Fusing thermostat defective
1. Reconnect the following connector.
Fusing Unit – PSU connector
2. If the connector is broken, shorted, or grounded,
replace the connector.
3. Replace the fusing unit.
PSU defective
Replace the PSU.
6-36
SM