Samsung RF265AB, Service Manual

Page: 54 / 107

55
TROUBLESHOOTING
3) If R DEF Sensor has trouble
Bad contact of connector/ insert correctly
Is MAIN PCB
Connector CN30 to CN75 inserted
correctly?
Is R DEF Sensor
unit normal?
Is the input voltage between
MAIN PCB Connector CN30#7(Skyblue)
to CN1#3(Black) normal?
Is the input voltage of IC01
MICOM # 57 normal?
Start
NO
YES
YES
YES
YES
Replace the temperature sensor
NO
Recheck the wire connection part
NO(0.6V > Measurement < 4.6V)
Check the iced-solder, solder bridging,
disturbed solder.
NO
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.
** Measuring point of resistance value according to
Sensor **
R-DEF : CN30#7 CN75#1 measuring
resistance value
** 0 : Short trouble / : Open trouble
Sensor MICOM/Connector Number
Voltage measured between 4.6V ~ 0.6V.
Measuring voltage of IC01 MICOM #57,
CN30#7(Sky-blue) and CN1#3(Black) from
PCB typical Ground part are similar.
Checking method of R Sensor resistance
CN30#7(Sky-blue) CN75#1(Gray)
- Compare the temperature table after the
measure.
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
R DEF Connector CN30-"7"(Sky-blue) and
CN1-"3"(Black) PCB common Ground
Checking method of R DEF Sensor resistance
- Measure the voltage of Sensor Check Point #4(IC01 MICOM #57) on
PCB or CN30#7Sky-blue) CN1#3(Black)
- Compare the temperature table after the measure.
Measuring voltage of CN30#7(Sky-blue) CN1#3(Black) are below.
typical PCB Ground
CN1#3(Black)
Start
YES
YES
YES