Casio CZ-1 Service Manual And Spare Parts List

(1)
PD
(Phase
Distortion)
Sound
Block
Music LSI
Two LSIs
generate
digital
PD sound
signals
as
show
below.
Modt NORMAL TONE
MIX
KEY SPLIT
jiPD933AC-1
(Mastar)
Mix
TONE
1 LOW
jiP0933AC*2
(Slavt)
TONE 2
UPPER
.
Mixes the
two
different
digital signals
and
converts
into an
analog
signal.
Music LSIs'
outputs
are
contracted
to
obtain
a
wide
dynamic
range
of
amplitude.
Expander
circuit
reforms it
into
a
proper
waveform.
Sample/Hold
Circuit
. . .
Removes a
hiyh
frequency
noise called
as
glitch
contained
in
the DAC output.
Also separates the
master and
slave
waveforms.
(2)
After
Touch
Block
After touch
effect gives
variation of
amplitude
and modulation to
the
output
sound.
After
touch
sensor under the keyboard
varies
its resistance
from infinity
to
approximately
lOohm
by
means
of
pressure
strength.
The change of the resistance is
input
to
Music
LSIs or
VAC
circuit
via
main
CPU.
The
CZ-1
is
able
to set
the depth
of
the effects
by
parameter
(0
-
15).
Afttf
touch
tfftct
F
low
of
af
tar
touch
signal
Modulation
Sarncr
m
Main
CPU
>•
Music
LSIs
Amplitude Stntor
w
Main
CPU
»
Aftar
touch control circuit
•
VCA
circuit
(3)
Stereo Chorus
Block
Gives stereo
effect
to
the
output sound.
ON/OFF
of
stereo effect
is input
by
panel
switch.
The
stereo chorus
effect
can
be
set individually
even
in
Tone Mix
or
Key
Split
mode.
Moda
Staraoaffact
ON/OFF
Tona
mix
Tonal:
ON.
Tona
2:
OFF
Kay
split
LOW: OFF, UPPER:
ON
(4)
VCA (Voltage Controlled
Amplifier)
Receives
voltage which
are
converted from
the
resistance
value of Main
VR, Foot VR,
or
after
touch
sensor.
In
accordance with
the
voltage
level,
this
block
vary
the
amplitude
of the
sound.
DAC
(Digital to
Analog
Converter)
Expander
Circuit

Casio CZ-1 Specifications

General

Brand	Casio
Model	CZ-1
Category	Synthesizer
Language	English