Samsung MultiXpress K4 Series Service Manual page 312

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) Remove and disassemble the fuser unit.
(Refer to 3.3.23 Fuser Unit)
2) Measure the resistance value of the thermistor (1404-001453). If the measured value is out of 307KΩ~430KΩ
@25℃, replace the thermistor.
3) Install the fuser unit after replacing the thermistor.
4) If the error persists, replace the fuser unit
5) If the error persists after replacing fuser unit, replace the main board(JC92–02746A).
4-77
(JC91-01163A(220V) / JC91–01164A
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(110V)).