Ricoh M281 Series Service Manual page 478

Service Call 501-582
SC No. Type
SC No. Type
SC551-00 D
D255/D256/M281/M282
Error Name/Error Condition/Major Cause/Solution

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.

PSU defective
1. Reconnect the following connector.

PSU – IOB connector
2. Replace the PSU.

Fusing lamp defective
Replace the fusing unit.
Error Name/Error Condition/Major Cause/Solution
Fusing Thermistor (End) Disconnected Error
Input from fusing thermistor (end) is 1019 or more (A/D value)
continuously for 4 seconds.

Connector defective or disconnected

Connector pin defective

Triac defective

Fusing thermistor defective

Fusing thermistor connection PCB defective

IOB defective

Connector defective or disconnected
Reconnect the following connectors.

Fusing Thermistor – Fusing Thermistor Connection
PCB connector

Fusing Thermistor Connection PCB – IOB connector

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.
6-40 SM