CIRCUIT
Half-wave rectified voltage (VB) from the power source
circuit is applied to the base of
The waveform is
generated from the collector of Q42.
This is the basic timing for all time processing.
Figure 20. Circuit and Waveform
ACL CIRCUIT
By switching on power supply charge current is fed
to
through
and generates Zener voltage (Vz).
If
exceeds the zener voltage of
is turned
on and the current flows. Thus the base current
flows through the transistor Q50 to turn on 050. By the
turning on of 050, a reset signal is obtained from the
collector.
Figure 21. ACL Circuit
BUZZER CIRCUIT
The square waveform developed from
terminal of LSI
(l-2) is applied to the base of
to turn on and off
and squard waveform voltage (2.5
is applied to
to generate buzzer sound.
- -
Figure 22. Buzzer Circuit
76
Summary of Contents for R-8320E
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