Samsung RF28HDEDBSR Service Manual page 82

TROUBLESHOOTING
10) If Humidity Sensor has trouble
ERROR Code
** Measuring point of resistance value according to
Sensor"
Humidity : CN30 "1" ↔ "3"
Resistance value with opened : about 50Ω
** 0Ω: Short trouble /Ω∞: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Humidity Connector CN30-"3"(brown) to
J23 JUMMPER PCB typical Ground
Voltage measured between 3.5V ~ 1.0V
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.
Start Start
Is MAIN PCB
Connector CN30 inserted
correctly?
YES YES
Is Humidity Sensor
unit normal?
YES YES
Is the voltage between
MAIN PCB Connector CN30-"3"(Brown) and
J23 JUMMPER normal?
YES YES
Is input voltage of
ICO1 MICOM #81 normal?
YES
No trouble with PCB temperature sensor.
Recheck the bad contact ofthe 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)
are below
82
NO
Bad contact of connector /insert correctly
NO
Replace the Humidity Sensor
DATA2. Humidity Sensor Table
NO (1.0V > Measurement < 3.5V)
Recheck the PCB & Wi r e Termi n al connecti o n
NO
Check the iced-solder, solder
bringing, disturbed solder
Exchange the PCB
PCB Typical Ground
↔
J23 JUMMPER
J23 JUMMPER