Samsung AQ12?5(6)MB Service Manual
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Contents
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5-9Samsung Electronics5-4 Fault Diagnosis of Major PartsPartsTemp.SensorHeat ex. SensorIndoor Fan MotorOutdoor Fan MotorStepping Motor(UP/DOWN swing motor)DiagnosisMeasure resistance with a tester.NormalAbnormal ∞, OΩ … open or shortMeasure resistance between terminals (CN72) with a testerNormal At ambient temperature (10°C ~ 30°C)Abnormal ∞, OΩ … open or shortMeasure the voltage between ground and signal wire of the fan motorNormalAbnormal Abnormal if voltage does not change from 0V to 5V.Normal At ambient temperature (10°C ~ 30°C)Abnormal ∞, OΩ … open or shortMeasure resistance between red wire and each terminal.Normal Approx. 380Ω at ambient temperature (20°C ~30°C)Abnormal ∞, OΩ … open or shortAmbient temperature 15°C 20°C 25°C 30°C 35°C 40°CResistance of 14.68 12.09 10 8.31 6.94 5.83thermistor[ KΩ]***7(*8)** ***5(*6)(*9)(*0)**between ResistanceBlack, Red 304±10% 360±10% MainBlack, White 289±10% 257±10% Subbetween VoltageGray, Orange 0.5V~4.5VYellow, Orange 5Vbetween VoltageRed, Blue 410±10% MainRed, Yellow 325±10% Sub |
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