Ricoh M0A0, Service Manual

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6.Troubleshooting
250
SC No. Level Error Name/Error Condition/Major Cause/Solution

Harness damaged

Failure in the BiCU

Replace the fan motor.

Check the connector.

Replace the harness.

Replace the BiCU.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC532-
00 D PSU Cooling fan error
The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to
receive the lock signal 50 times in succession.
 Failure in the motor
 Loose connector
 Harness damaged
 Failure in the BiCU

Replace the fan motor.

Check the connector.

Replace the harness.

Replace the BiCU.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC541-
00 A Broken fusing (Center) thermistor wire
The condition whereby the temperature is -20 deg C or less for 5 seconds has been detected
10 times or more.

Broken thermistor wire

Bad connector contact

Clear the SP: fusing SC.

Check the connector connection.

Replace the fusing (Center) thermistor.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC542-
01 A Fusing lamp (Center) not reloaded (Deformed thermistor)
The heater thermistor has increased by less than 20 degrees C in 3 seconds 5 times in a row.

Deformed or floating thermistor

Input voltage out of range
 Clear the SP: fusing SC.
 Replace the thermistor.