Samsung RF4287HABP/XAA - Page 76

77
TROUBLESHOOTING
9) If Humidity Sensor has trouble
ERROR Code
Bad contact of connector /insert correctly
Is MAIN PCB Connector
CN30 to CN30 inserted
correctly?
Is Humidity Sensor
unit normal?
Is the voltage between
MAIN PCB Connector CN30-”3”(Brown) and REG1, Heat
Sink normal?
Is input voltage of
ICO1 MICOM #73 normal?
Start
NO
YES
YES
YES
YES
DATA2. Humidity Sensor Table
Replace the Humidity Sensor
NO
Recheck the PCB & Wire Terminal connection
NO (1.0V > Measurement < 3.5V)
Check the iced-solder, solder
bringing, disturbed solder
Exchange the PCB
NO
No trouble with PCB temperature sensor.
Recheck the bad contact ofthe connection
** Measuring point of resistance value according to
Sensor "
Humidity : CN30#1↔ #3
Resistance value with opened : about 50Ω
** 0Ω: Short trouble / ∞Ω: Open trouble
Sensor MICOM/Connector number
Voltage measured between 3.5V ~ 1.0V
Measuring voltage of ICO1 MICOM #73,
CN30-"3"(Brown) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the Resistance, R321
☞ Checking method ofHumidity Sensor resistance
CN30-"3"(Brown)↔ "1"(Gray)
- Compare the temperature table after the measure.
Refer to circuit diagram in the manual
Humidity
Connector CN30-"3"(brown) to
REG1 HEAT-SINK PCB typical Ground
Start
YES
YES
YES
☞ Checking method ofHumidity Sensor voltage.
- Measure the voltage of Resistance, R321(IC01 MICOM #73)
on PCB or CN30-"3"(Brown) ↔ REG1, HEAT SINK
- Compare the temperature table after the measure.
Measuring voltage of CN30-"3"(Brown) ↔ REG1, HEAT SINK
are below
Typical PCB Ground
REG1 HEAT-SINK
AW3 SM-EN 2011.3.31 2:56 PM 페 이 지 7 7 i n