Ricoh M281 Series Service Manual page 477

SC No. Type
SM
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.
6-39
Service Call 501-582
D255/D256/M281/M282