Samsung RF4287HARS/XAA - Page 73

74
TROUBLESHOOTING
6) If F DEF Sensor has trouble
Bad contact of connector/ insert correctly
Are MAIN PCB
Connector CN30 and
CN76 insert correctly?
Is F DEF Sensor
unit normal?
Is the voltage between
MAIN PCB Connector CN30#4(Orange) and
REG1, HEAT SINK normal?
Is the input voltage of
IC01 MICOM #77 normal?
Start
NO
YES
YES
YES
YES
Replace temperature sensor
NO
Recheck the wiring connection
NO(0.6V > Measurement < 4.6V)
Check the iced-solder, solder
bridging, disturbed solder
NO
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.
** Measuring point of resistance value according to
Sensor **
F-DEF : CN30#5 ↔ CN76#1 measuring resistance
value
** 0Ω: Short trouble / ∞Ω: Open trouble
Sensor MICOM/Connector number
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #75,
CN30-"5"(Orange) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the 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.
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
F DEF
Connector CN30-"5"(Orange) to
REG1, HEAT SINK PCB typical Ground
☞ Checking method of F DEF Sensor voltage
- Measure the voltage of Resistance, R310(IC01 MICOM #75) on
PCB or CN30-"5"(Orange) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement.
Measuring voltage of CN30-"5"(Orange) ↔ REG1, HEAT SINK are
as below
Typical PCB Ground
REG1, Heater Sink
Start
YES
YES
YES
AW3 SM-EN 2011.3.31 2:56 PM 페 이 지 7 4 i n