Samsung RF4287HARS Service Manual page 75

AW3 SM-EN 2011.3.31 2:56 PM 페이지76 in
TROUBLESHOOTING
8) If Flex Sensor has trouble
ERROR Code
Temperature table
** Measuring point of resistance value according to
Sensor **
Flex : CN30#9 ↔ CN76 #1 measuring resistance value
** 0Ω: Short trouble / ∞Ω: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Pantry Connector CN30-"9"(Yellow) to
REG1 HEAT SINK PCB typical Ground
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #81,
CN30-"9"(Yellow) and REG1, HEAT SINK
from PCB typical Ground part are similar.
→ Check the measure on the Resistance, R314 due to the
SMD MICOM
☞ Checking method of Flex Sensor resistance
CN30-"9"(Yellow) ↔ CN76#1(Gray)
- Compare the temperature table after measurement.
DATA1.
No trouble with PCB and temperature sensor.
☞ Checking method of Flex Sensor voltage
- Measuring resistance, R314(IC01 MICOM #81) on PCB or
CN30-"9"(Yellow) ↔ REG1, HEAT SINK
- Compare the temperature table after measurement.
Measuring voltage of CN30-"9"(Yellow) ↔REG1, HEAT SINK
are as below
Start Start
Is MAIN PCB NO
Connector CN30 and CN76 insert
correctly?
YES YES
NO
Is Pantry Sensor
normal?
YES YES
Is the voltage between NO(0.6V > Measurement < 4.6V)
MAIN PCB Connector CN30#9(Whiteblack)
and REG1, HEAT SINK normal?
YES YES
NO
Is the input voltage of IC01
MICOM Pin# 73 normal?
YES
Recheck the bad contact of the connection.
76
Bad contact of connector/ insert correctly
Replace temperature sensor
Recheck the wiring connection
Check the iced-solder, solder
bridging, disturbed solder
Typical PCB Ground
REG1 Heater Sink