Samsung CLP-775ND Series Service Manual

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4. Alignment and Troubleshooting► Error CodeA3–3111A3–3112U1–2320U1–2330U1–2340► Error messageError: #A3-3111 / Actuator Sensor Failure: #A3-3111.Error: #A3-3112 / Actuator Sensor Failure: #A3-3112.Error: #U1-2320/ Fuser Unit Failure: #U1-2320.Turn off then on.Error: #U1-2330/ Fuser Unit Failure: #U1-2330. Turn off then on.Error: #U1-2340/ Fuser Unit Failure: #U1-2340. Turn off then on.► SymptomThermistor error (A3–3111/3112) or Fuser error (U1–2320/2330/2340) has occurred.► Troubleshooting methodNOTEFor repairing the fuser unit, refer to the newest service bulletin.Symptom Check point Result ActionNormal (Open) Case1) Replace the fuser unit and main board.SMPS TriacAbnormal(Short)Case2) Replace the fuser unit and SMPS.Normal(Contact)Case3) Replace the fuser unit and main board. Check the SMPSTriac.ThermistorAbnormal(Non-Contact)Case4) Replace the fuser unit. Check the SMPS Triac.Normal (Short) Case5) SET Swap.The fuser unit ismelted.ThermostatAbnormal(Open)Case6) Replace the fuser unit. Check the SMPS Triac.Normal (Open) Case7) Replace the fuser unit and main board.SMPS TriacAbnormal(Short)Case8) Replace the fuser unit and SMPS.Normal(Contact)Case9) Replace the fuser unit and main board. Check the SMPSTriac.The fuser unit isnot melted butthe thermostat isopen.ThermistorAbnormal(Non-Contact)Case10) Replace the fuser unit. Check the SMPS Triac.1) Replace the fuser unit.Copyright© 1995-2016 SAMSUNG. All rights reserved. 4-32