Samsung RFG298AA series Service Manual page 72

TROUBLESHOOTING
7) If F DEF Sensor has trouble
ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to
Sensor **
F-DEF : CN30#4 ↔ CN76#1 measuring resistance
value
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
F DEF Connector CN30#4(Orange) to
REG1, HEAT SINK PCB typical Ground
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #77,
CN30#4(Orange) and REG1, HEAT SINK from
PCB typical Ground part are similar.
→ Check the measure on the SENSOR MARKING #2(R310)
due to the SMD MICOM
☞ Checking method of F DEF Sensor resistance
CN30#4(Orange) ↔ CN76#1(Gray)
- Compare the temperature table after measurement.
Start Start
Are MAIN PCB
Connector CN30 and
CN76 insert correctly?
YES YES
Is F DEF Sensor
unit normal?
YES YES
Is the voltage between
MAIN PCB Connector CN30#4(Orange) and
REG1, HEAT SINK normal?
YES YES
Is the input voltage of
IC01 MICOM #77 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 Sensor Check Point #2(IC01 MICOM
#77) on PCB or CN30#4(Orange) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement.
Measuring voltage of CN30#4(Orange) ↔ REG1, HEAT SINK are
71
NO
Bad contact of connector/ insert correctly
NO
Replace temperature sensor
NO(0.6V > Measurement < 4.6V)
Check the contact of PCB & Wire
Terminal correctly.
NO
Check the iced-solder,
solder bridging, disturbed solder.
Replace the PCB
Typical PCB Ground
REG1, Heater Sink