Samsung RFG297AARS Service Manual page 68

TROUBLESHOOTING
4) If Ambient Sensor has trouble
ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to
Sensor **
Ambient : CN31#1 ↔ #4 measuring resistance value
** Placed in the right top table of upper hinge.
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Ambient Connector CN31#1(Yellow) to
REG1, HEAT-SINK PCB typical Ground
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #72,
CN31#1(Yellow) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #7(R307)
due to the SMD MICOM
☞ Checking method of Ambient Sensor resistance
CN31#1(Yellow) ↔ #4(Yellow)
- Compare the temperature table after
measurement.
Start Start
Is MAIN PCB
Connector CN31 inserted
correctly?
YES YES
Is Ambient Sensor
unit normal?
YES YES
Is the voltage between
MAIN PCB Connector CN31#1(Yellow)
and REG1, HEAT SINK normal?
YES
YES
Is the input voltage of
IC01 MICOM #72 normal?
YES
No trouble with PCB and temperature sensor
Recheck the bad contact of the connection
☞ Checking method of Ambient Sensor voltage
- Measure the voltage of Sensor Check Point #7(IC01 MICOM #72)
on PCB or CN31#1(Yellow) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement.
Measuring voltage of CN31#1(Yellow) ↔ REG1, HEAT SINK are as
below
67
NO
Bad contact of connector/ insert correctly
NO
Replace the temperature sensor
NO(0.6V > Measurement < 4.6V)
Recheck the wiring connection
NO
Check the iced-solder, solder
bridging, disturbed solder
Typical PCB Ground
REG1 Heater Sink