– 62 –
2. Buzzer Circuit
When the buzzer is to be activated, buzzer output pin
30
of the micro computer alternates between ON and
OFF repeatedly at 4kHz and Q301 is turned ON/OFF accordingly. A 4kHz voltage is applied to the buzzer
and the diaphragm of the buzzer vibrates to output 4kHz sound.
3. Initial setting (IC401)
The pre-heating operation start value, ratings of the compressor, maximum rotation speed, etc. are preset in
the micro computer.
4. Receive circuit
Infrared signals from the wireless remote controller are received by the light receiving unit and output after
being amplified and shaped.
Micro computer
(AX-7X30)
BUZZER
BZ1
12V
0V
R301
Q301
B.Z
30
87
IC401
(E
2
PROM)
65
Micro computer
(AX-7X30)
26
27
R404
R403
12 4
3
5V
0V
5V
D401
45
2
1
6
3
0V
SDA
SCL
C1104
R141
R1109
0V
0V
Receiver
Unit
12V
13
Micro computer
(AX-7X30)
REMOCON I/P
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