Samsung RF265AB, Service Manual

Page: 57 / 107

58
TROUBLESHOOTING
6) If F DEF Sensor has trouble
Bad contact of connector/ insert correctly
Are MAIN PCB
Connector CN30 to
CN75 insert correctly?
Is F DEF Sensor
unit normal?
Is the voltage between
MAIN PCB Connector CN30#4(Orange)
to CN1#3(Black) normal?
Is the input voltage of
IC01 MICOM #53 normal?
Start
NO
YES
YES
YES
YES
Replace temperature sensor
NO
Recheck the wiring connection
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 **
F-DEF : CN30#4 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 #53,
CN30#4(Orange) and CN1#3(Black) from
PCB typical Ground part are similar.
Checking method of F DEF Sensor resistance
CN30#4(Orange) CN75#1(Gray)
- Compare the temperature table after the measure.
DATA1.
Temperature table
ERROR Code
Refer to circuit diagram in the manual
F DEF Connector CN30#4(Orange) to
CN1#3(Black) PCB typical Ground
Checking method of F DEF Sensor voltage
- Measure the voltage of Sensor Check Point #1(IC01 MICOM
#52) on PCB or CN30#4(Orange) CN1#3(Black)
- Compare the temperature table after the measure
Measuring voltage of CN30#4(Orange) CN1#3(Black) are below
typical PCB Ground
CN1#3(Black)
Start
YES
YES
YES