Casio CZ-1 Service Manual And Spare Parts List

21-2.
Function
of
Each
Block
Analog switch
(TC40538P)
Filter A
Compressor
Three-Phase
LFOs
VCOs
BBOs
Filter
B
Expander
Determines
whether
or not
passing
melody signal through
Stereo
Chorus
circuits.
(Controlled
by
CPU)
As the
BBD
does
not pass
signals
which
exceed
20KHz,
this block
is a
low-pass
filter
whose
cutoff frequency
is
20KHz.
In
accordance with input signal
level, this
block controls the
amplitude.
When
the input signal
is
small,
the circuit amplifies
the
signal whereas
the amplitude becomes smaller when
the
input
is
a
large-level waveform.
The block
is used for reducing the noise.
Generates low-frequency triangle signals
of
0.56Hz
and
7.14Hz.
The three
outputs
differ
120 degrees
in
phase.
Voltage Controlled Oscillator which
generates the
clock
pulses for the
BBOs.
Their
oscillation frequencies
vary
in
accordance with
the
input
voltage level.
Bucket
Brigade
Device. Stereo
chorus effect is given
by
delaying
the
right or
the
left
sound.
Since the
output
signal
of the
BBD
carries
a
noise
caused
by
clock pulses,
the
filter
removes
the noise.
Functions
contrary
to the
Compressor. This
circuit is
also
used
for
reducing
the noise.
-51-

Casio CZ-1 Specifications

General

Brand	Casio
Model	CZ-1
Category	Synthesizer
Language	English