If Pantry Sensor Has Trouble - Samsung RFG237AA Service Manual

TROUBLESHOOTING

9) If Pantry Sensor has trouble

ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to
Sensor **
Pantry : CN30#9 ↔ CN76 #1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Pantry Connector CN30#9(White-black) to
REG1 HEAT SINK PCB typical Ground
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.
Start Start
Is MAIN PCB
Connector CN30 and CN76 insert
correctly?
YES YES
Is Pantry Sensor
normal?
YES YES
Is the voltage between
MAIN PCB Connector CN30#9(Whiteblack)
and REG1, HEAT SINK normal?
YES YES
Is the input voltage of IC01
MICOM Pin# 73 normal?
YES
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.
☞ 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
73
NO
Bad contact of connector/ insert correctly
NO
Replace temperature sensor
NO(0.6V > Measurement < 4.6V)
Check the contact of PCB & Wire
Terminal correctly.
NO
Check the iced-solder,
solder bridging, disturbed solder.
Replace the PCB
Typical PCB Ground
REG1 Heater Sink