Samsung RB195ACBP, Service Manual

Page: 48 / 97

48
TROUBLESHOOTING
6) If F DEF Sensor has trouble
Bad contact of connector/Insert correctly
Is Main PCB Connector
CN30 inserted correctly?
Is F DEF Sensor unit normal?
Is the voltage between
Main PCB Connector CN30-#6(Pink) and REG1,
Heat Sink normal?
Is the input voltage of IC10
MICOM #58 normal?
Start
NO
YES
YES
YES
YES
Replace temperature sensor
NO
Check 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-DEF : CN30 #6 ↔ #8 Measure the resistance value
**
∞Ω
: Short trouble /
∞Ω
: Open trouble
Sensor MICOM/Connector number
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).
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
F DEF Connector CN30-#6(Pink) and REG1
Heat-Sink PCB commonGround
Start
YES
YES
YES
☞ Checking method of F DEF Sensor resistance
CN30-#6(Pink)
↔ #8(Gray)
-. Compare with the temperature table after
measuring.
☞ 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
Common PCB
Ground of REG1 Heater Sink
NW-미주향-AC 2010.6.8 3:47 PM 페이지48 in