Samsung RF23HT Series Service Manual

80TROUBLESHOOTING4) If R DEF Sensor has troubleERROR CodeBad contact of connector/ insert correctlyIs MAIN PCBConnector CN30 and CN76 insertedcorrectly?Is R DEF Sensorunit normal?Is the input voltage betweenMAIN PCB Connector CN30-”8”(Skyblue)and REG1-GND normal?Is the input voltage of IC01MICOM # 3 normal?StartNOYESYESYESYESReplace the temperature sensorNORecheck the wire connection partNO(0.6V > Measurement < 4.6V)Check the iced-solder, solderbridging, disturbed solder.NONo trouble with PCB and temperature sensor.Recheck the bad contact of the connection.** Measuring point of resistance value according toSensor **R-DEF : CN30-"8" ↔ CN76-"1" measuringresistance value** 0Ω: Short trouble Ω∞: Open troubleSensor MICOM/Connector NumberVoltage measured between 4.6V ~ 0.6V.Measuring voltage of IC01 MICOM #3CN30-"8"(Sky-blue) and REG1-GND fromPCB typical Ground part are similar.→ Check the measure on the voltage of Resistance R313due to the SMD MICOM☞ Checking method of R Sensor resistance CN30-"8"(Sky-blue) ↔ CN76-"1"(Gray)- Compare the temperature table aftermeasurement.DATA1.Temperature tableRefer to circuit diagram in the manualR DEF Connector CN30-"8"(Sky-blue) andREG1-GND PCB typical Ground☞ Checking method of R DEF Sensor resistance- Measure the voltage of Resistance R313(IC01 MICOM #3) onPCB or CN30-”8”(Sky-blue) ↔ REG1-GND- Compare the temperature table after measurement.Measuring voltage of CN30-”8”(Sky-blue) ↔ REG1-GNDare as below.PCB Typical GroundREG1-GNDStartYESYESYES