Samsung RF195AC Service Manual page 44

TROUBLESHOOTING
3) If R DEF Sensor has trouble
ERROR Code
DATA1.
Temperature Table
** Measuring point of resistance value according to
Sensor **
R-DEF : CN30 #4 ↔ #8 Measure the resistance value
** ∞Ω : Short trouble / ∞Ω : Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector Number
R DEF Connector CN30-#4(Orange) and REG1
Voltage is measured between 4.6V ~ 0.6V
Voltage of IC10 MICOM #54 is same with the
measuring voltage of CN30-#4(Orange), REG1,&
Heat Sink from PCB common Ground part.
→ Check the measure on MICOM or, Sensor
Marking #2(R303).
☞ Checking method of R DEF Sensor resistance
CN30-#4(Orange) ↔ #8(Gray)
-. Compare with temperature table after measuring.
Start Start
Is Main PCB Connector
CN30 inserted correctly?
YES YES
Is R 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 IC10 MICOM # 54
normal?
YES
No trouble with PCB and temperature sensor
Recheck the bad contact of the connector.
☞ Check method of R DEF Sensor voltage
-. Measure the voltage of Sensor Check Point #2(IC10 MICOM
#54) on PCB or CN30-#4(Orange) ↔ REG1, Heat Sink.
-. Compare with temperature table after measuring.
Below is the measuring voltage of CN30-"4"(Orange) ↔ REG1, Heat Sink
44
NO
Bad contact of connector/Insert correctly
NO
Replace the temperature sensor
NO (0.6V > Measurement < 4.6V)
Recheck the wire connection part
NO
Check the Cold solder joint,
short, solder Touch
Common PCB
Ground of REG1 Heat Sink