Service manual

4. Alignment and Troubleshooting
Service Manual
ML-551x / 651x series
4-51
Samsung Electronics
 Code
A3-2110
 Error message
Actuator Sensor Failure: #A3-2110.
 Symptom / Cause
ID control algorithm to control the density fi nds the ID Sensor value input in an abnormal state.
1. The image density of the imaging unit is abnormal.
2. ID sensor (CTD sensor) is defective.
 Troubleshooting method
1. In case of density defect.
Print the sample page. If the density is too low or dark, replace the imaging unit.
2. In case of ID sensor defect.
Print the sample page. If the density is normal, replace the ID sensor or the sensor cleaning part.
 Code
A3-5110
 Error message
Actuator Sensor Failure: #A3-5110.
 Symptom / Cause
The signal level of the Toner Empty sensor is 0V.
 Troubleshooting method
1. Remove the Left cover. Check if the sensor connector of the WTB Pipe unit is connected properly.
2. If the harness is defective, replace it.