Ricoh SP 8400DN Field Service Manual page 1256

6.Troubleshooting
SC No. Type
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SC No. Type
SC360-01 D TD Sensor Adjustment Error
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SC No. Type
SC361- D TD Sensor Output Error: Upper Limit (K)
01 The following condition continuously exceeds the upper limit threshold value (SP3-211-
003).
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SC No. Type
SC362- D TD Sensor Output Error: Lower limit (K)
01 TD sensor output: Vt (SP3-210-001) < output lower limit error threshold (SP3-211-004) is
continuously below the lower limit occurrence threshold value (SP3-211-005)
518
Error Name/Error Condition/Major Cause/Solution
Replace the development motor.
Reconnect the connector.
Replace the harness.
Replace the BCU.
Replace the development unit.
Replace the driven unit.
Error Name/Error Condition/Major Cause/Solution
When Mu count exceeds the judgment threshold of no developer status.
When Mu count does not satisfy the following target ranges for 3 times in a row.
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Upper threshold
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Lower threshold
TD sensor defective
Loose connection
Harness broken
Developer toner density differs from initial developer
Replace the TD sensor harness.
Reconnect the TD sensor connector.
Replace the TD sensor.
Replace the development unit.
Error Name/Error Condition/Major Cause/Solution
TD sensor output: Vt (SP3-210-001) > output upper limit error threshold (SP3-211-
002)
TD sensor connector dropout (connection fault)
Check if the TD sensor connector is connected.
Check the harness of the TD sensor (disconnection, etc.).
Replace the TD sensor.
Error Name/Error Condition/Major Cause/Solution