Samsung RF195ABRS Service Manual page 47

TROUBLESHOOTING
6) If F DEF Sensor has trouble
ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according
to Sensor **
F-DEF : CN30 #6 ↔ #8 Measure the resistance value
** ∞Ω : Short trouble / ∞Ω : Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
F DEF Connector CN30-#6(Pink) and REG1
Heat-Sink PCB commonGround
Voltage is measured between 4.6V ~ 0.6V
Voltage of IC10 MICOM #58 is same with the
measuring voltage of CN30-"6"(Pink) and REG1,
& Heat Sink from PCB common Ground part.
→ Check the measure on MICOM or, Sensor
Marking #4(R307).
☞ Checking method of F DEF Sensor resistance
CN30-#6(Pink) ↔ #8(Gray)
-. Compare with the temperature table after
measuring.
Start Start
Is Main PCB Connector
CN30 inserted correctly?
YES YES
Is F DEF Sensor unit normal?
YES YES
Is the voltage between
Main PCB Connector CN30-#6(Pink) and REG1,
Heat Sink normal?
YES YES
Is the input voltage of IC10
MICOM #58 normal?
YES
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connector.
☞ Checking method of F DEF Sensor voltage
-. Measure the voltage of Sensor Check Point #4(IC10 MICOM
#58) on PCB or CN30-"6"(Pink) ↔ REG1, Heat Sink.
-. Compare with the temperature table after measuring.
Below is the measuring voltage of CN30-"6"(Pink) ↔REG1, Heat Sink
47
NO
Bad contact of connector/Insert correctly
NO
Replace temperature sensor
NO (0.6V > Measurement < 4.6V)
Check the wiring connection.
NO
Check Cold solder joint,
Short, Solder Touch
Common PCB
Ground of REG1 Heater Sink