Samsung RF195ABRS Service Manual page 43

TROUBLESHOOTING
2) If R Sensor has trouble
ERROR Code
DATA1.
Temperature Table
** Measuring point of resistance value according
to Sensor **
R : CN30 #3 ↔ #8 Measure the resistance value
** ∞Ω : Short trouble / ∞Ω : Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Connector CN30#6(White) to REG1
R
HEAT-SINK PCB typical Ground
Voltage is measured between 4.6V ~ 0.6V
Voltage of IC10 MICOM #53 is same with the
measuring voltage of CN30-#3(Red), REG1, & Heat
Sink from PCB common Ground part.
→ Check the measure on MICOM or Sensor
Marking #1(R301).
☞ Checking method of R Sensor resistance CN30-
#3(White) ↔ #8(Gray)
-. Compare with the temperature table after
measuring
Start
Is Main PCB
Connector CN30 inserted
correctly?
YES
Is R Sensor unit
normal?
YES
Is the voltage between Main
PCB Connector CN30- #3(Red) & REG1,
Heat Sink normal?
YES
Is the input
voltage to IC10 MICOM #53
normal?
YES
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connector.
☞ Checking method of R Sensor voltage.
-. Measure the voltage of Sensor Check Point #1(IC10 MICOM
#53) on PCB or CN30-#3(Red) ↔ REG1, Heat Sink
-. Compare with the temperature table after measuring. Below is
measuring voltage of CN30-#3(Red) ↔ REG1, Heat Sink.
43
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