Casio CZ-1 - Bbd

20-3. Circuit
Function
(T)
Decoder
for
Stereo
Chorus ....
Generates control
signals for the
analog
switch.
(SN74LS174N-2)
(2)
Analog
switch
Selects
whether or
not passing the
melody
signal
through
(TC40538P)
Stereo
Chorus
circuits.
(5)
BBD (MN3209)
Bucket
Brigade Device
for
Stereo
Chorus effect.
(4)
Output
Amp
Mixes the stereo or
monaural
signals.
20-4.
Line-out
Circuit
Rtiay
RIGHT-OUT
(A/Ate)
LEFT
OUT
(B)
T
RIGHT
VDL20-
4.7k
6.3
V
1000m
r
OG
LEFT
To
main Amp.
M524IL
VCA
AG1
(LEFT)
LA646201
H/2)«2
vcc
>
I
-vcc
AG1
(RIGHT)
AGt
(T)
Stereo sounds are
output
only
when
output
plugs are connected
to
both A/A+B
and
B
terminals,
while mixed
sound
is
heard
when
output plug is connected only one terminal.
Note:
When output plug
is connected at
B
terminal,
mixed sound
B/A+B is
also
output.
(?)
The
relay
eliminates
a
shock
noise
at
power
ON/OFF. Voltage level
VDL2
is controlled
by
signal
LDC
from terminal
PB6 of
Sub
CPU.
(Refer
to
page
19)
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