Casio CZ-1 Service Manual And Spare Parts List page 118

!
Base voltage
generator
VCA
mixer
Main
VR
GND
(When Max.
pressure)
9omi
rv
rm*
nm nm
±
i
I i
|
ill
stiHl
I
Hit
:t >!
a a a a a
a
M
(*)
ID iO
^
Decoder
SN74CS174N-1
O O O O O O
^
(n
n
v m
(O
i
i
CI
D
O
o
w
c
w
V
c
o>
01
a>
o
>
^:>rrrrt~: rh rrrrr From Main
CPU
Data bus
DO - D5
Output volume
is
controlled
by V
~A
(Voltage Controlled Amplifier)
M5241
L.
The
VCA
amplitude
is
controlled
by
VCA
control signal
which
is
generated
by
VCA
mixer.
The
VCA
mixer output
is
controlled
by
foot
VR, main
VR,
and
after
touch
sensor,
and
varies
its
output
voltage
in
negative
logic.
Besides,
VCA
control signal
is
also varied
by
Amp.
or
after
touch parameter.
Main
VR
Pressure of
after
touch
sensor
Amp./After touch
parameter
15 8
VCA
control
signal
Min.
No
pressure
-4.6V -3.6V
-2.5V
Max.
No
pressure
-2.0V
-1.0V
+0.2V
Max. Max.
pressure
\
+0.2V
+0.2V +0.2V
-56-