Yamaha CS-30 Service Manual page 11
Combo synthesizers
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Also See for CS-30:
- Owner's manual (24 pages) ,
- Patch list (23 pages) ,
- Owner's manual (24 pages)
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CS-30(S/ # 1001—)
VCF 1C (IG00156)
1. A!
2. KV
3.
fc
4. Vf
5. Vcc
6. QO
7. VQ .
8. GNO
9.
FB ..
10.
LP .
11. C2 .
12. Vee
13.
BP .
14.
Cl ..
15.
HP
16.
IN .
... Signal Input
Input signals from VCO are provided
to this pin.
.... Key voltage input
In order to change the tone color
according to the tone range of key¬
board, the degignated voltage of the
key will supplied to the pin. (0.25-
4.0V)
.... Adjustment of the cut off frequency.
Set the control currency of the cut
off frequency.
...
Input of the cut off voltage.
Input voltage of cut off frequency is
supplied to this pin so that the tone
color can be changed.
The center
point of the cut off frequency can be
also set.
When the
VK
is 0.25V and Vf is
5V. the cut off frequency is set to
just 1 KHz.
. +15V input power source
.... Q adjustment.
The Q control current sets the Q
equal to 1 0. when VQ is 0 volt.
...
Input of the voltage for Q control.
Q is variable according to the control
voltage supplied.
When the control voltage is
0V (Max.), Qs 10
When the control voltage is
10V (Min.), Q'0.5
....
Earth
. Q feed back
This is the feed back output pin for
the
Q control by which
the Q is
determined.
. Low-pass output
I -6dB/OCT
L™.
The output o*
lower fre-
quencies are produced.
C pin for determination of the cut
off frequency.
— 15V power source.
Band-pass output.
dB/OCT
►
The output of intermediate
frequences are produced.
C pin for determination of the cut
off frequency.
Hi-pass output
+6dB/OCT
The output of higher fre¬
quencies are produced.
Input of feed back
The input signal for determination of
cut off frequency.
-Explanation
for 1C
( I CttW)
VCF
Circuit Diagram
VCO-KF1 ua>-2)-^
GG_ vCQ.kf , ofQ.5,
FII
FIO
[input]
(PSWI)
I-1
VR2
eiooK
VCF I
vco- MKD-6)
BR _ N|
I i.
vco-aiK3>-7)^i<>0^—
'So
LFO-NiKD-n
VCF-EXT(fS)-12)££o^
VC0-EXT«ft)-7)
i r-
s
22 OK
TP4
I .
® TP2©-4
*58
L _T-iL -I-
VCO-N2(®-3)
VCO-n2(©-4)
VCF
VEqK2
GG
H 2
ilevelI
(PVR2)( PVRI)
c
KB0
FOLLOW
MiJIi
(PSW3)
r;F
(PVR3)
!RES0NANCEl[
(PVR5)
(PVR71
r ~ir
'P
i
Y
i
1
X
I
i
1 2|-
1
j "T
1
1
__J
1 ...
VPI_
B200K
1
• -
1
1
■
^
*
h
1>
1
,
t r
00 Cl C2
GNO
MK
4 7M
NP
OOOI5
-i^o^-vcA-HPtKD-D
BPUGY
VCABPttCD-9)
VC A-H P1
(CD-
10)
Oi
—T—J
(PSW4)
(PVR9)
LECTOR [depth I
i
270K
-
Buffer
vco-Kvro.gj
VI
kv
150-
V
(o)TPI
Buffer
TP5
(o) TP3
«k>
r
-
0*15
1 2=
I- -T-'
L -Y-! L_Y__
► -15
KBD
FOLLOW
(PVR6)
(PVR4)
(PVR8)
8=
(PSW6) (PVRII)
•15
VCF 2
220K
&
S
•15
*
St®
C^3
l^o2
IOK
a
If
M
^
""In
HP
*v (0
nr
rc
*0
Ci
V,
g
BP
Uf f
vcc u
00 C
VTc
C2
VO 3
IP
GNO*-
r B
•6
0 0015
820K
0 0015
10/16
-lb
HP
HP2^GG
VCA-HP2(CD-n)
I0M6
ffiTP
T-
si
i^O^-VCA BP2|fi>13>
VCALP2((0-12)
LP2rt PK
LI_J
MOD
SELECT
EG
EG
SELECTOR DEPTH
(PVR 10)
(PSW7) (PVRI2)
.*10
VCO-KF2H0-7)
VC0-KF20f0 6)
F20
VC0-*v(®-2)-
VCA-M<2)-2)
VCO-K «Ci)-4) •
VCA-NW)-3)
VC0.^(f«)13»-
ICI ,2= IG00I56(A)(8)(C)
IC3.4 * NJM4558DN
Rl.2,3,4
Rank RI.R2
A
30K , 470
B
1 2.4 K
430
C
1 20 K
390
WH
GG
VCOTUSM)
VCA-ap^-5)
SB
VC0-S/H{d>9)-
OR
PN3-PL-2
PN3-PL-1
VCF-EXS(®-15)-
VCA-EXT((2>-7)
PK
—^-SEQ-BM»-3)
VCO-B((5)-6J
•VCA-At(D-2)
VC0-A(®3)
VCA-E(®-6)
VCO-EtdM 1)
SEQOfl)-6)
VC0DP»)-9)
VCACPD-4)
VC0-CfS»-7)
-15
-9-
KEC-90108-78 A
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