Samsung RF267AE series Service Manual page 65

TROUBLESHOOTING
7) If Ice Room Sensor has trouble
ERROR Code
2¢ (-17¡ ) is recommended
DATA1.
Temperature table
** Measuring point of resistance value according to
Sensor **
Ambient : CN31#3 ↔ CN76#1 Measure the resistance
value
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to the circuit diagram in this manual
Sensor MICOM/Connector number
Ice Room Connector Cn31#3(Orange) to REG1
HEAT-SINK PCB common Ground
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #77,
CN30-"4"(Orange) and REG1, HEAT SINK from PCB
typical Ground part 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.
38¢ (3¡ ) is recommended
ConnectorCN31 and CN76
inserted correctly?
Is Ice Room Sensor
Is the voltage between
MAIN PCB Connector CN31#3 (Orange) and
REG1, HEAT SINK normal?
Is the input voltage of
IC01 MICOM #71 normal?
No trouble with PCB and temperature sensor.
Check the bad connections.
☞ Checking method of Ice Room Sensor voltage
- Measure the voltage of Sensor Check Point #8
(IC01 MICOM #71) on PCB or CN31#3(Orange) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement. Measuring
voltage of CN31#3(Orange) ↔ REG1, HEAT SINK are as below
64
Start Start
Is MAIN PCB
NO
YES YES
NO
unit normal?
YES YES
NO(0.6V > Measurement < 4.6V)
YES YES
NO
YES
Bad contact of connector/ insert correctly
Replace temperature sensor
Check the contact of PCB & Wire
Terminal correctly.
Check the iced-solder, solder bridging,
disturbed solder. Replace the PCB
typical PCB Ground
REG1 HEAT-SINK