Ricoh SP 8400DN Field Service Manual page 1257

SC No. Type
TD sensor connector missing/dropout
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SC No. Type
SC370- C ID Sensor Calibration Error
00
Regular reflection optical output voltage of the ID sensor: Vsg_reg cannot be adjusted to
within target range.
Upper limit (SP3-320-013: initial value 4.5V)
Lower limit (SP3-320-014: initial value 3.5V)
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SC No. Type
SC391- D High Voltage Power Source: Development : Output Error
00
When the machine detects the error detection signal "L (abnormal)" 10 times for 200 ms
consecutively by monitoring the error detection signal every 20ms during output of the
PWM signal used as an error detection target.
Hardware error
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Load error
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Error Name/Error Condition/Major Cause/Solution
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
ID sensor connector missing/connection fault
ID sensor detection window dirt
ID sensor malfunction
Check the ID sensor connector. If it is not connected, reconnect it.
Check for dirt on the ID sensor detection window. If the detection window is dirty,
clean by the predetermined method (do not wipe it dry).
If neither of the above have occurred, replace the ID sensor.
Error Name/Error Condition/Major Cause/Solution
Input / Output connector is disconnected.
Surface/air clearance insufficient (arc discharge)
Input / Output harness is short-circuited.
BCU error (signal error)
HVPS defective
Grounding fault of charging output, short-circuit with other outputs
Surface/air clearance insufficient in charging output path (including distance from other
outputs)
Unexpected deterioration of drum, and over current due to pinholes
Over current due to drum surface condensation
PCDU is not set properly.
6.Troubleshooting
519