REFRIGERATOR CIRCUITS
POWER CIRCUIT
The secondary part of the TRANSFORMER is composed of the power supply for
the display, the BLDC FAN Motor drive (15.5 V
DC
), the relay drive (12 V
DC
), and
the MICOM and IC (5 V
DC
).
VA1 is a part for preventing over voltage and noise. When 385 V or higher power
is applied, the inside elements are short circuited and broken, resulting in blowing
the fuse to protect the elements of the secondary part of the TRANSFORMER.
OSCILLATOR CIRCUIT
This circuit generates the base clock for calculating time and the synchro clock
for transmitting data from and to the inside logic elements of the IC1 (MICOM).
Be sure to use specified replacement parts, since calculating time by the IC1
may be changed. If changed, the OSC1 SPEC will not work.
LFX21960ST/LFX25960xx Page 49 of 75 TRAINING MANUAL
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