Ricoh M0A0, Service Manual

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6.Troubleshooting
248
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC364-
00 D Toner End Sensor output count error
Under the condition that the toner cartridge has not reached the end, an error that no toner is
supplied has been detected over n times in succession. (where n is to be configured using SP2-
931-003)
 Bad connector contact or connector disconnected/wire broken
 Failed toner end sensor
 Dirty detection surface inside the development unit
 Check the connector connection or check for broken wire.
 Replace the harness.
 Replace the toner end sensor.
 Replace the PCDU.
SC400 (Image Processing
–
2)
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC440-00 D High voltage output error: Transfer unit
This SC is issued if the BiCU detects a short in the power pack 10 times consecutively.
Short circuit (-)

Replace the controller board.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC498-00 C Temperature/humidity Sensor error
 Temperature sensor output error: Out of range between 0.76 V and 2.90 V
 Humidity sensor output error: 2.4 V or more
 Unmounted sensor (Disconnected connector or broken wire)
 Failed sensor

Check that the connector is set.

Set the sensor.

Replace the sensor.

Replace the connector.
SC500 (Paper Feed and Fusing)
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC508-
00 B Bypass bottom plate operation error
The signal from the bypass bottom plate position sensor has not changed (the signal has not
changed from ON to OFF or vice versa) for 4 seconds or more after the start of reverse Paper
Feed Unit rotation. If the error is detected three times in succession, the SC number is displayed on