Ricoh SP 8400DN Field Service Manual page 1255

SC Tables: SC3xx (Image Processing 1: Charge, Development, Around
the drum)
SC302-00 to SC396-01
SC No. Type
SC302- D High Voltage Power Source: Charge: Output Error
00
The machine detects the error detection signal "L (unexpected)" 10 times for 200 msec
consecutively when monitoring the error signal every 20 msec during outputting the PWM
signal.
Hardware error
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Load error
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SC No. Type
SC324- D Development Motor: Bk: Lock
01
Lock signals are observed at 2 sec intervals during motor ON, and a High level is detected
at least 20 times.
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Error Name/Error Condition/Major Cause/Solution
Input / Output connector is disconnected.
Input / Output harness is short-circuited.
Surface/air clearance insufficient (arc discharge)
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 gap error between
the drum and charge roller (PCU error).
Over current due to drum surface condensation
PCU is disconnected.
Cycle the main power off/on.
Replace the HVPS.
Replace the harness of the HVPS.
Replace the harness of the PCU.
Replace the PCU.
Error Name/Error Condition/Major Cause/Solution
Motor defective
Connector disconnected
Harness broken
BCU defective
Unit torque increased
6.Troubleshooting
517