Ricoh G133 Service Manual page 236

SC Table
No. Type
The shutter open sensor loses the "ON" signal after the shutter was
closed.
Replace the shutter on the laser optics housing unit.
No. Type
Shutter overrun error 2: Open
The shutter open sensor detects "ON" after SC 291 has occurred.
295 D
Replace the shutter on the laser optics housing unit.
No. Type
Shutter open/close sensor error
Both shutter open sensor and close sensor detect "ON" at the same
time.
296 D
Replace the shutter on the laser optics housing unit.
No. Type
300 D AC charge output error [K]
301 D AC charge output error [M]
302 D AC charge output error [C]
303 D AC charge output error [Y]
G133
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Defective motor
Change of load to shutter motor
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Defective motor
Change of load to shutter motor
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Broken harness(es) of the shutter open/close sensors
Details (Symptom, Possible Cause, Troubleshooting Procedures)
4-20 SM