Service Call 501-582
SM 6-39 D255/D256/M281/M282
SC No. Type Error Name/Error Condition/Major Cause/Solution
Connector pin defective
If the I/F connector pins of the fuser unit and the main unit
are deformed owing to foreign materials, replace the
connectors or the units including the connectors.
Triac defective
Disconnect the power cord and check that the resistance
between terminals T1 and T2 of the triac TRA31 and triac
TRA41 on the PSU are several Mega-Ohms and not
shorted. If failed, replace the PSU.
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.
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