Samsung RFG297AABP - Page 72

71
TROUBLESHOOTING
8) If Pantry Sensor has trouble
Bad contact of connector/ insert correctly
Is MAIN PCB
Connector CN30 and CN76 insert
correctly?
Is Pantry Sensor
normal?
Is the voltage between
MAIN PCB Connector CN30#9(Whiteblack)
and REG1, HEAT SINK normal?
Is the input voltage of IC01
MICOM Pin# 73 normal?
Start
NO
YES
YES
YES
YES
Replace temperature sensor
NO
Recheck the wiring connection
NO(0.6V > Measurement < 4.6V)
Check the iced-solder, solder
bridging, disturbed solder
NO
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.
** Measuring point of resistance value according to
Sensor **
Pantry : CN30#9 ↔ CN76 #1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble
Sensor MICOM/Connector number
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #73,
CN30#9(White-black) and REG1, HEAT SINK
from PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #6(R314)
due to the SMD MICOM
☞ Checking method of Pantry Sensor resistance
CN30#9(White-black) ↔ CN76#1(Gray)
- Compare the temperature table after measurement.
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
Pantry
Connector CN30#9(White-black) to
REG1 HEAT SINK PCB typical Ground
☞ Checking method of Pantry Sensor voltage
- Measuring voltage of Sensor Check Point #6(IC01 MICOM #73) on
PCB or CN30#9(White-black) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement.
Measuring voltage of CN30#9(white-black)↔REG1, HEAT SINK are
as below
Typical PCB Ground
REG1 Heater Sink
Start
YES
YES
YES