Samsung RF31FM Series Manual page 170

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6. Self Diagnosis & Trouble Shooting
6-1. If the trouble is detected by self-diagnosis
Measuring voltage of IC01 MICOM #83,
CN30-"5"(Orange) and J23 JUMMPER
from PCB typical Ground part are similar.
→ Check the measure on the voltage of
Resistance, R310 due to the SMD
MICOM
☞ Checking method of F DEF Sensor
resistance CN30-"5"(Orange) ↔
CN76-1(Gray)
- Compare the temperature table after
measurement.
YES
Is the input voltage of
IC01 MICOM #83 normal?
YES
No trouble with PCB and
temperature sensor.
Recheck the bad contact of
the connection.
☞ Checking method of F DEF Sensor voltage
- Measure the voltage of Resistance, R310(IC01 MICOM #83) on
PCB or CN30-"5"(Orange) ↔ J23 JUMMPER
- Compare the temperature table after measurement. Measuring
voltage of CN30-"5"(Orange) ↔ J23 JUMMPER are as below
Check the iced-solder, solder
NO
bridging, disturbed solder
PCB Typical Ground
J23 JUMMPER
To do list
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