Ricoh M281 Series Service Manual page 480

Service Call 501-582
SC No. Type
SC No. Type
SC581-00 C
D255/D256/M281/M282
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 thermistor defective
Replace the fusing unit.

IOB defective
Replace the IOB.
Error Name/Error Condition/Major Cause/Solution
Temperature Sensor Disconnected Error

The average of the output from the temperature sensor is
1019 or more for 160 ms.

The average of the output from the temperature sensor is
930 or more for 5 seconds.

Temperature sensor defective

IOB defective
6-42 SM