Ricoh SP 8400DN Field Service Manual page 1252

6.Troubleshooting
SC No. Type
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SC No. Type
SC220- D Laser Synchronization Detection Error: Leading Edge
00
The laser synchronizing detection signal for the start position of the LD was not output for
200msec. after LDB unit turned on with the polygon motor rotating normally.
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SC No. Type
SC230- D FGATE ON Error
00
The FGATE signal did not turn ON within the given time period after the writing process
started.
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SC No. Type
SC231- D FGATE OFF Error
00
The FGATE signal did not turn OFF within the given time period after the writing process
ended.
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514
Error Name/Error Condition/Major Cause/Solution
Replace the IPU board.
Error Name/Error Condition/Major Cause/Solution
The interface harness to the synchronization detection unit damaged or not connected
correctly.
Synchronization detection board defective
Beam does not enter photo detector.
Abnormality around GAVD
IDB (LED driver) defective
LDB defective
IPU defective
Turn the power off/on.
Replace the laser unit.
Replace the harness.
Replace the IPU board.
Error Name/Error Condition/Major Cause/Solution
GAVD defective
Image processing ASIC defective
BCU, controller board not connected correctly or defective
Harness between BCU and LDB defective
Turn the power off/on.
Replace the harness between IPU and laser unit.
Replace the IPU board.
Replace the controller board.
Error Name/Error Condition/Major Cause/Solution
GAVD defective