Sensor Failure: #A3-3111. Turn Off Then On. Call For Service If The Problem Persists; Sensor Failure: #A3-3112. Turn Off Then On. Call For Service If The Problem Persists; Sensor Failure: #A3-3113. Turn Off Then On. Call For Service If The Problem Persists; Sensor Failure: #A3-3114. Turn Off Then On. Call For Service If The Problem Persists - Samsung CLX-8640 series Service Manual

4. Troubleshooting
► Error Code
A3–3111
A3–3112
A3–3113
A3–3114
► Error message

Sensor Failure: #A3-3111. Turn off then on. Call for service if the problem persists.

Sensor Failure: #A3-3112. Turn off then on. Call for service if the problem persists.

Sensor Failure: #A3-3113. Turn off then on. Call for service if the problem persists.

Sensor Failure: #A3-3114. Turn off then on. Call for service if the problem persists.

► Symptom
The NC sensor in the fuser unit is defective. / The sensor signal is abnormal due to a defective harness.
► Troubleshooting method
• A3–3111 : Center NC sensor is in short status.
• A3–3112 : Center NC sensor is in open status.
• A3–3113 : Side NC sensor is in short status.
• A3–3114 : Side NC sensor is in open status.
1) Enter SVC mode. Execute sensor test to check the sensor operation.
(Diagnostics > Engine Diagnostics > Engine Test Routines)
• 109-0000 : Fuser Temperature A
• 109-0010 : Fuser Temperature B
2) Remove the fuser unit and disassemble the NC thermistor.
3) Measure the resistance value of the thermistor.
• Side : 1404–001718
• Center : 1404–001719
If the measured value is out of 307KΩ~430KΩ @25℃, replace the thermistor.
4) Install the fuser unit after replacing the thermistor.
5) If the thermistor is normal, replace the harness between the fuser unit and main board. (JC39–01746A)
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