Samsung RF4287HARS Service Manual page 69

AW3 SM-EN 2011.3.31 2:56 PM 페이지70 in
TROUBLESHOOTING
2) If R Sensor has trouble
ERROR Code
Temperature table
** Measuring point of resistance value according to
Sensor **
R : CN30#6 ↔ CN76#1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Connector CN30#6(White) to
R
REG1 HEAT-SINK PCB typical Ground
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage IC01 MICOM #76,
CN30#6(White) and REG1, HEAT SINK
from PCB typical Ground part are similar.
→ Check the measure on the Resistance, R311 due
to the SMD MICOM
☞ Checking method of R Sensor resistance
CN30#6(White) ↔ CN76#1(Gray) Compare the
temperature table after measurment.
DATA1.
No trouble with PCB and temperature sensor.
☞ Checking method of R Sensor resistance
- Measure the voltage of Sensor Check Point #3(IC01 MICOM
#76) on PCB or CN30#6(White) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement.
Measuring voltage of CN30#6(White) ↔REG1, HEAT SINK
are as below.
Start
Is MAIN PCB NO
Connector CN30 and CN76 inserted
correctly?
YES
NO
Is R Sensor
unit normal?
YES
Is the voltage between NO(0.6V > Measurement < 4.6V)
MAIN PCB Connector CN30#6(White) and
REG1 HEAT-SINK normal?
YES
NO
Is the input voltage of
IC01 MICOM #76 normal?
YES
Recheck the bad contact of the connection.
70
Bad contact of connector/ insert correctly
Replace the temperature sensor
Recheck the wire connection part
Check the iced-solder, solder bridging,
disturbed solder.
Typical PCB Ground
REG1, HEAT SINK