ā 80 ā
2. Buzzer Circuit
When the buzzer is to be activated, buzzer output pin
83
of the micro computer alternates between ON and
OFF repeatedly at 4kHz and Q301 is turned ON/OFF accordingly. A 4kHz voltage/frequency 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. Receiver circuit
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