Casio CZ-1 Service Manual And Spare Parts List page 111

21.
Stereo Chorus Circuit
21.1.
BLOCK DIAGRAM
From
Sample/
Hold
circuit
MLL
Amp.
X-COM
Amp.
MLR
^
Y-COM
I?
If*
ox
OY
OZ
Amp.
1Z
Amp.
Three phase
LFO
(0.56 Hz)
plA
*2A *3A
01 B
*?B *3B
Three phas«
LFO
(7.14
Hz)
MLTH
(Original
melody
signal
of
left)
MRTH
(Original
melody
signal
of
right)
MMTH
(Original
melody
signal
of mix)
.
To
VCA
mixer
circuit
on PCB AS1M
MTH
(Original
melody
signal for stereo chorus)
To
Chorus
VR
mixer
on PCB CN2N
Filter
A
Compressor
VCO
VCO
BBD1
Filter
B Expander
18k
Clock
i;
39k
BB0
2
Filter
B Expander
Clock
BBD3
Finer
B Expander
18k
Amp.
OUTR
(BBD
out R)
39k
Amp.
VCO
Clock
B
OUT
L
(BBD
out L)
Note:
BBD
:
Bucket
Brigade Device
VCO
:
Voltage Controlled Oscillator
VCA
:
Voltage Controlled Amplifier
LFO
:
Low
Frequency
Oscillator