Ricoh M281 Series Service Manual page 470

Service Call 501-582
SC No. Type
SC520-01 D
SC No. Type
SC520-02 D
D255/D256/M281/M282
Error Name/Error Condition/Major Cause/Solution
Main Motor Error 1
The main motor is not stabilized within 2 seconds after the motor
is activated.

Main motor defective

IOB defective

Main motor defective
1. Reconnect the following connector. Then perform a
conduction inspection. If there is no conduction, replace
the connector.

IOB – Main Motor connector
2. Replace the main motor.

IOB defective
1. Update the engine software to the latest version.
2. Replace the IOB.
Error Name/Error Condition/Major Cause/Solution
Main Motor Error 2
After the main motor is stabilized, the stable OFF signal is
detected for 2 seconds consecutively.

Main motor defective

IOB defective

Main motor defective
1. Check if the gears rotate smoothly. If any gears are
damaged, replace them.
2. Reconnect the following connector. Then perform a
conduction inspection. If there is no conduction, replace
the connector.

IOB – Main Motor connector
3. Replace the main motor.

IOB defective
1. Update the engine software to the latest version.
2. Replace the IOB.
6-32 SM