Check For Malfunctioning Of The Subordinate; Inspection Of The Sensor - Samsung SR-L677EV Service Manual

Reference3

Check for malfunctioning of the subordinate

Reference4

Inspection of the sensor

3. R-defrost sensor measures resistance of CN30 between ④~⑤.
4. F-defrost sensor measures resistance CN30 between ③~⑤.
5. The measurement value above is calculated by comparing the present temperature of the sensor
and the temperature table in specification found in the manual.
* Cut off the power code, separate the housing
from the main PCB CN70,71 and measure the
following.
1. Measure resistance between the terminals and
check for malfunctioning of L/W.
Measurement
Subordinate
R Defrost heater
F Defrost heater
Comp
Comp-circulation fan
R-Circulation fan
F-Circulation fan
R-Lamp
F-Lamp
* Separate the housing connected to main PCB
CN30.
* Resistance value lowers while temperature
rises, because it is a NTC type sensor.
1. R sensor measures resistance of CN30
between ②~⑤.
2. Freezer sensor measures resistance of CN30
between ①~⑤.
40
Evaluation of mea-
terminal surement result
CN70 ⑤ - ①
CN70 ⑦ - ①
CN70 ⑨ - ①
CN71 ⑦ - ①
CN71 ⑤ - ①
CN70 ③ - ①
CN71 ⑨ - ①
CN71 ③ - ①