Samsung RF31FM Series Manual page 164

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6. Self Diagnosis & Trouble Shooting
6-1. If the trouble is detected by self-diagnosis
Measuring voltage of IC01 MICOM #86
CN30-"8"(Sky-blue) and J23 JUMMPER
from PCB typical Ground part are similar.
→ Check the measure on the voltage of
Resistance R313 due to the SMD
MICOM
☞ Checking method of R Sensor resistance
CN30#8(Sky-blue) ↔ CN76#1(Gray)
- Compare the temperature table after
measurement.
YES
Is the input voltage of IC01
MICOM # 86 normal?
YES
No trouble with PCB and
temperature sensor.
Recheck the bad contact of
the connection.
☞ Checking method of R DEF Sensor resistance
- Measure the voltage of Resistance R313(IC01 MICOM #86) on
PCB or CN30-"8"(Sky-blue) ↔ J23 JUMMPER
- Compare the temperature table after measurement. Measuring
voltage of CN30-"8"(Sky-blue) ↔ J23 JUMMPER are as below.
Check the iced-solder, solder
NO
bridging, disturbed solder.
PCB Typical Ground
J23 JUMMPER
To do list
164