Samsung RFG298AA - Page 70

69
TROUBLESHOOTING
5) If Ambient Sensor has trouble
Bad contact of connector/ insert correctly
Is MAIN PCB
Connector CN31 inserted
correctly?
Is Ambient Sensor
unit normal?
Is the voltage between
MAIN PCB Connector CN31#1(Yellow)
and REG1, HEAT SINK normal?
Is the input voltage of
IC01 MICOM #72 normal?
Start
NO
YES
YES
YES
YES
Replace the temperature sensor
NO
Check the contact of PCB & Wire
Terminal correctly.
NO(0.6V > Measurement < 4.6V)
Check the iced-solder,
solder bridging, disturbed solder.
Replace the PCB
NO
No trouble with PCB and temperature sensor
Recheck the bad contact of the connection
** 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
Sensor MICOM/Connector number
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.
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
Ambient
Connector CN31#1(Yellow) to
REG1, HEAT-SINK PCB typical Ground
☞ 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
Typical PCB Ground
REG1 Heater Sink
Start
YES
YES
YES