Yamaha CS-60 Service Manual page 12

KBC
Circuit
Board
cs60(s/#riooi~
)
RA2-KAS—
6.5 (94)
RA2-KAS-SC
(54)
PN2-VR18-2
PN2-VR17-2
RA2-KAS-0
RA-R6-KC8
(68)
RA-R6-KC7
(67)
RA-R6-KC1
RA-R6-KC2
(56)
RA-R6-KC3
(59)
RA-R6-KC4
(60)
nA-R6-KC5
(63)
RA-R6-KC6
(64)
RA-SUB—
15
(59)
RA-KAS—
15
(89)
PN3-SW2-B
+ 15(34)
+ 15(35)
BL12x2
PK12
PK12
-e
VI
BE
GR
YE
^s
OR
()•:
-. •.
RE
GY
BR12
RA2-KAS-E
(2)
RA-SUB-E
(2)
RA2-KAS-+8.5 (98)
RA-SUB-+8.5
(55)
RA2-KAS-B3
(57)
+r— RA2-KAS-B2
(58)
- RA2-KAS-B1
(60)
RA2-KAS-N4
(61)
RA2-KAS-N3
(63)
8BEE55B
—
ra2-kas-n2
(64)
BR
():••
•' .••
—
RA2-KAS-N1
(66)
_,
BR12
-m-
RA2-KAS-+15
(101)
RA-SUB-+15
(35)
DA
CONVERTER
LSI
(YM26700)
The
time shared
key
data
is
supplied to the LSI.
Analog
DC
voltage
is
produced
in
corporation with key by the data
and supplied
to
each channel.
VSS
+8.
5V Power Supply
SC8 Synchro-clock input
on
the first channel.
POR
Portamento and Glissando operation.
When
the portament
VR
is
turned on, +8.5V
is
supplied to the pin
and
actuate.
PC
Clock input for
Portament and
Glissando
operation.
U
1
.4sec.~1 .4msec.
»)
j
i
r
_.... +8.5
I—
-6.5V
N1
N4
The frequency
is
variable by Changing the
portamento VR.
Note code
data input
Note code
data
is
supplied to the pins
from
key coder LSI.
11.
B1V
Oc
If
-
B3
Octave code data input
ctave
code
data is
supplied to the pins
m
key coder
LSI.
12.
OO
......
Output for octave key voltage. (8ch time
sharing)
Provided the output key voltage
for
the
octave
selected
from octave
code.
13.
OCT0\
Input for octave key voltage.
18.
OCT5'
*
TU
pin:
4.0V
OCT0
OCT1
OCT2 OCT3 OCT4 OCT5
Voltage
0.25V
0.5V 1.0V
2.0V
4.0V 4.0
V
The
voltage of
TU
line
is
divided by the
ladder
composed
resistors and supplied to
each pin constantly.
19.
C$\
....
Input tor note key voltage
30.
C
OO
pin: 4.0V
C#
D
D#
E
F
F#
Voltage 2.119 2.245 2.378 2.520
2.670
2.828
G G# A
A#
B C
Voltage 2.997
3.175
3.364 3.564 3.775 4.0V
Note)
1.
Print Board LC21216 5.
IC1,2
CD4006AE
2. Resistor
IC3
TC4019P
22K
:
±5%
IC4.5
TC4013P
Other
:
±1% IC6,7
TC4073P
3.
Diode
1S1555
IC8
TC4069P
4.
VR1,2
(V10K4A-5-2)
IC9.10
TC4016P
IC11
YM
26700
IC12
LM310
IC13~22
NJM4558
6.
*
Mark Ceramic Capacitor
Other Mylar Capacitor
31.
38.
39.
40.
CH81
CH1
y
VDD
The voltage of
OO
line is
divided by the
ladder composed
resistors
and supplied to
each pin constantly.
Key
voltage
output
The
output of voltage
determined by
each
key
is
provided
in
accordance with the
channel key code.
—6.5V Power
Supply, Input
Master Clock Input
f=94±5KHz
10-KEP-NA03562-72
A