Ricoh M281 Series Service Manual page 458

Service Call 490-491
SC No. Type
D255/D256/M281/M282
Error Name/Error Condition/Major Cause/Solution

Toner motor defective
1. Check the drive gears can rotate or they are not
unusually loaded. If necessary, replace the drive gear.
2. Reconnect the following connectors.

Toner Density Sensor – Drum PCB connector

Drum PCB – Drum Connection PCB connector

Drum Connection PCB – Connect-Left PCB
connector

Connect-Left PCB – IOB connector
3. If the connector is broken, shorted, or grounded,
replace the connector.
4. Replace the drum unit.

Connect-Left PCB defective
Replace the Connect-Left PCB.

IOB defective
1. Update the engine software to the latest version.
2. Replace the IOB.
6-20 SM