Samsung RB195ACRS Service Manual page 46

NW-미주향-AC 2010.6.8 3:47 PM 페이지46 in
TROUBLESHOOTING
4) If Ambient Sensor has trouble
ERROR Code
Temperature table
** Measuring point of resistance value according to
Sensor **
Ambient : CN31#1 ↔ #3 Measure the resistance value
** Placed in the right top table of upper hinge.
** ∞Ω : Short trouble / ∞Ω : Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Ambient Connector CN31-#1(White) and REG1
Heat-Sink PCB common Ground
Voltage measured between 4.6V ~ 0.6V.
Voltage of IC10 MICOM #59 is same with the
measuring voltage of CN31-#1(White), REG1, &
Heat Sink from PCB common Ground part.
→ Check the measure on the MICOM or, Sensor
Marking #5(R309).
☞ Checking method of Ambient Sensor resistance
CN31-#1(White) ↔ #3(White)
-. Compare with the temperature table after
measuring.
DATA1.
No trouble with PCB and temperature sensor.
☞ Checking method of Ambient Sensor voltage
-. Measure the voltage of Sensor Check Point #5(IC10 MICOM
#59) on PCB or CN31-"1"(White) ↔ REG1, Heat Sink.
-. Compare with the temperature table after measuring.
Below is the measuring voltage of CN31- #"1(White) ↔ REG1, Heat Sink
Start Start
Is Main PCB NO
Connector CN31 inserted
correctly?
YES YES
NO
Is Ambient Sensor unit normal?
YES YES
Is the voltage between NO (0.6V > Measurement < 4.6V)
Main PCB Connector CN31-#1(White) and REG1,
Heat Sink normal?
YES YES
Is the input
NO
voltage of IC10 MICOM #59
normal?
YES
Recheck the bad contact of the connector.
46
Bad contact of connector/Insert correctly
Replace the temperature sensor
Recheck the wiring connection
Check the Cold solder joint, short,
solder touch.
Common PCB
Ground of REG1 Heater Sink