Samsung RB195ACBP, Service Manual

Page: 47 / 97

47
TROUBLESHOOTING
5) If F Sensor has trouble
BAd contact of connector / Insert correctly
Is Main PCB Connector
CN30 inserted correctly?
Is F Sensor unit normal?
Is the voltage between
Main PCB Connector CN30-#5(Yellow) and REG1,
Heat Sink normal?
Is the input voltage of
IC10 MICOM #57 normal?
Start
NO
YES
YES
YES
YES
Replace temperature sensor
NO
Recheck the wiring connection
NO (0.6V > Measurement < 4.6V)
Check Cold solder joint,
Short, solder Touch
NO
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connector.
** Measuring point of resistance value according to
Sensor **
F : CN30 #5 ↔ #8 Measure the resistance value
**
∞Ω
: Short trouble /
∞Ω
: Open trouble
Sensor MICOM/Connector number
Voltage is measure between 4.6V ~ 0.6V
Voltage of IC10 MICOM #57 is same with the
measuring voltage of CN31-"5"(Yellow), REG1, &
Heat Sink from PCB common Ground part.
→ Check the measure on MICOM or, Sensor
Marking #3(R305).
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
F
Connector CN30-#5(Yellow) and
REG1 Heat-Sink PCB common Ground
Start
YES
YES
YES
☞ Checking method of F Sensor resistance
CN30-#5(Yellow)
↔ #8(Gray)
-. Compare with the temperature table after
measuring.
☞ Checking method of F Sensor voltage
-. Measure the voltage of Sensor Check Point #3(IC10 MICOM
#57) on PCB or CN30-#5(Yellow) ↔ REG1, Heat Sink.
-. Compare with the temperature table after measuring.
Below is the measuring voltage of CN30-"5"(Yellow) ↔ REG1, Heat Sink.
common PCB
Ground of REG1 Heater Sink
NW-미주향-AC 2010.6.8 3:47 PM 페이지47 in