Samsung RS68N Series Service Manual page 67

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PRECAUTIONS(SAFETY WARNINGS)
■ Self-diagnostics check list
LED
Item
F R
F-Sensor Error
R-Sensor Error
F-DEF-Sensor
Error
Fridge-
Defrostsensor
Error
Ambient-Sensor
Error
Ice Maker Sensor
Error
Humidity-Sensor
Error
F-FAN Error
F
Trouble contents
Display error : separation of
sensor housing part, contact
error, disconnection, short
The voltage of MAIN PCB CN30
circuit.
Display error of detecting
temperature of sensor : more
than 149°F(+65°C) or less
than -58°F(-50°C)
The voltage of MAIN PCB CN30
The voltage of MAIN PCB CN30
Display error : separation
of sensor housing part,
contact error, disconnection,
short circuit Display error
of detecting temperature
of sensor: more than 149°F
(+65°C) or less than -58°F(-
50°C)
Separation of sensor
housing part, contact error,
disconnection, short circuit
Display error during
operation of applicable fan The voltage of MAIN PCB CN74
motor : Feed back signal line
contact error, motor wire
separation, motor error
R
Diagnostic method
When measuring the voltage
between the Main PCB CN30
3PIN - 7PIN, it should read
between 4.5V~1.0V.
When measuring the voltage
between the Main PCB CN30
5PIN - 7PIN, it should read
between 4.6V~1.0V.
4PIN - 7PIN shall be between
4.5V~1.0V
6PIN - 7PIN shall be between
4.5V~1.0V
1PIN-2PIN
shall be between 4.5V~1.0V
The Voltage of MAIN PCB
CN90 3PIN - 9PIN Shall be
between 4.5V ~ 1.0V.
When measuring the voltage
between the Main PCB CN30
11PIN-7PIN, it should read
between 4.5V~1.0V.
4PIN - 1PIN shall be between
7V~12V
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