Samsung RF4287HAWP - Page 74

75
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 : CN78#10 ↔ 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 #90,
CN78-"10"(Orange) and REG1, HEAT SINK from
typical PCB Ground are similar.
→ Check the measure on the Resistance, R316 due
to the SMD MICOM
☞ Checking Mehod of Ice Room Sensor voltage
CN78-"10"(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 CN78-"10"(Orange) and REG1,
HEAT SINK from typical PCB Ground
☞ Checking Method of Ice Room Sensor Voltage
- Measure the Resistance, R316(IC01 MICOM #90) on PCB or
CN78-"10"(Orange) ↔ REG1, HEAT SINK
- Compare with the temperature table after measurement.
Measured voltage of CN78-"10"(Orange) ↔ REG1, HEAT
SINK are as below
Typical PCB Ground
REG1, HEAT SINK
Start
YES
YES
YES
AW3 SM-EN 2011.3.31 2:56 PM 페 이 지 7 5 i n