– 43 –
(3) Smoothing capacitor (C501)
This smoothes (averages) the voltage rectified by the diode stacks.
VD
(DC voltage)
+
Fig. 1-2
C501
A
a
b
a
b
OV
OV
OV
+
–
B
–
VD
DC voltage
(approx. 260-380V during operation)
● Be careful to avoid an electric shock as a
high voltage is generated. Also take care
not to cause a short-circuit through incorrect
connection of test equipment terminals. The
circuit board could be damaged.
Fig. 1-3
(4) Smoothing capacitor (C501)
This smoothes (averages) the voltage rectified by the diode stacks.
A DC voltage is generated in the same way as in Fig. 1-3.
(5) C507, C508, C512, C513, C506, NF COIL1, NF COIL2, C502, C503, C514
These absorb electrical noise generated during operation of compressor, and also absorb external noise
entering from power line to protect electronic parts.
(6) Surge absorber, varistor 1, 2, 3
These absorbs external power surge.
(7) Inrush protective resistor
This works to protect from overcurrent when power is turned on.
< Reference >
● When inrush protective resistor is defective,
diode stack may malfunction. As a result,
DC voltage is not generated and no
operation can be done.
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