Samsung RF31FM Series Manual page 176

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6. Self Diagnosis & Trouble Shooting
6-1. If the trouble is detected by self-diagnosis
Measuring voltage of ICO1 MICOM #81,
CN30-"3"(Brown) and J23 JUMMPER
from PCB typical Ground part are similar.
→ Check the voltage of Resistance,
R321
☞ Checking method ofHumidity Sensor
resistance CN30-"3"(Brown)↔ "1"(Gray)
- Compare the temperature table after the
measure.
YES
Is input voltage of
ICO1 MICOM #81 normal?
YES
No trouble with PCB and
temperature sensor.
Recheck the bad contact of
the connection.
☞ Checking method ofHumidity Sensor voltage.
- Measure the voltage of Resistance, R321(IC01 MICOM #81)
on PCB or CN30-"3"(Brown) ↔ J23 JUMMPER
- Compare the temperature table after the measure. Measuring voltage
of CN30-"3"(Brown) ↔ J23 JUMMPER are below
NO
Check the iced-solder, solder
bringing, disturbed solder
Exchange the PCB
PCB Typical Ground
J23 JUMMPER
To do list
176