Samsung RFG297AABP - Page 71

70
TROUBLESHOOTING
7) If Ice Room Sensor has trouble
Bad contact of connector/ insert correctly
Is MAIN PCB
Connector CN31 and CN76 inserted
correctly?
Is Ice Room Sensor
unit normal?
Is the voltage between
MAIN PCB Connector CN31-”3”(Orange)
and REG1, HEAT SINK normal?
Is the input voltage of
IC01 MICOM #71 normal?
Start
NO
YES
YES
YES
YES
Replace temperature sensor
NO
Check 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.
Check the bad connections.
** Measuring point of resistance value according to
Sensor **
Ambient : CN32#3 ↔ CN76#1 Measure the resistance
value
** 0Ω: Short trouble / ∞Ω: Open trouble
Sensor MICOM/Connector number
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #71,
CN31-”3”(Orange) and REG1, HEAT SINK from
typical PCB Ground are similar.
→ Check the measure on the SENSOR MARKING #8(R308)
due to the SMD MICOM
☞ Checking Mehod of Ice Room Sensor voltage
CN31-”3”(Orange) ↔ CN76-”1” (Gray)
- Compare with the temperature table after
measurement.
DATA1.
Temperature table
ERROR Code
Refer to the circuit diagram in this manual
Ice Room
Connector CN31-”3”(Orange) and REG1,
HEAT SINK from typical PCB Ground
☞ Checking Method of Ice Room Sensor Voltage
- Measure the voltage of sensor checking point #8(IC01 MICOM #71) on
PCB or CN31-”3” (Orange) ↔ REG1, HEAT SINK
- Compare with the temperature table after measurement.
Measured voltage of CN31-”3” (Orange) ↔ REG1, HEAT SINK are as
below
Typical PCB Ground
REG1, HEAT SINK
Start
YES
YES
YES