Refrigerator Service Guide

59
TROUBLESHOOTING
2) If R Sensor has trouble
Bad contact of connector/ insert correctly
Is MAIN PCB
Connector CN30 to CN76 inserted
correctly?
Is R Sensor
unit normal?
Is the voltage between
MAIN PCB Connector CN30#6 (White) and
REG1, HEAT SINK normal?
Is the input voltage to
IC01 MICOM #76 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 **
R : CN30#6 ↔ 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 #76,
CN30-"6"(White) and REG1, HEAT SINK from
PCB common Ground part are similar.
→ Check the measure on the SENSOR MARKING
#3(R311) due to the SMD MICOM
☞ Checking method of R Sensor resistance
CN30#6(White) ↔ CN76#1(Gray) Compare the
temperature table after the measure.
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
R
Connector Cn30#6(White) to
REG1 HEAT-SINK PCB common Ground
☞ Checking method of R Sensor voltage
-
Measure the voltage of Sensor Check Point #3(IC01
MICOM #76) or CN30#6(White) ↔ REG1, HEAT SINK.
- Compare the temperature table after the measure.
Measuring voltage of CN30#6(White)
↔ REG1,
HEAT SINK are below.
typical PCB Ground
REG1 HEAT-SINK
2¢(-17¡) is recommended 38¢(3¡) is recommended
AW-SEM Transform(RF267,2#3957D8 2009.8.20 4:53 PM 페 이 지 5 9 i n