Ricoh B230 Service Manual page 265

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Shutter sensor time over error: Close
The shutter close sensor does not detect "ON" for 2000msec after the
shutter motor turns on.
Defective shutter close sensor
Disconnected or broken harness
Defective shutter motor
Defective shutter
290 D
Shutter motor overload
Defective IOB
1. Check or replace the harness.
2. Replace the shutter on the laser optics housing unit.
3. Replace the shutter motor.
4. Replace the shutter close sensor.
5. Replace the IOB.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Shutter overrun error 1: Close
The shutter close sensor loses the "ON" signal after the shutter was
closed.
291 C
Defective motor
Change of load to shutter motor
1. Replace the shutter on the laser optics housing unit.
SM 4-25 B230/B237