Korg MS-20 Service Notes

KORG
MS-20
1.
SPECIFICATIONS
<
CONTROL
SECTION
1.
Keyboard
2.
VoJiage
cDTiiroNfld
oscjilalor
1
3.
v.c.o.a
4.
V.C.O, ma&ier
control
5-
V.C-O.mixei
e
Volrage
coofrolletl
Etigh
pass
filter
7.
Voliage coniroHed
low pass
Ijller
8,
Envelope
flenerator
1
9.
Envelope
generalor 2
10.
Mcdulallon
Oeneraiof
11-
ManuSJ
conlioller
12.
P.Swiichand
wofume
13. Jndicalor
•C^C
37
keys
(3
octaves)
•Scale (32\
16',
&:
A)
(8
ociavfls,
4
ceni,
-
cwiT)
•
Wawelorm(
A,
hv
,
PW
{
RJ
—
nj
I,
wfitta
noise) (4
modes}
•Pulsewidttiadiusll
:
l
-'
I
:»
•
Scale
I6'h
a: 4\ 2}
(B
ociaves.
+
ceni.
-
ceni)
Waveform
f
N-CL,
fL^. rfng
modulator)
(4
modes)
•
Pilch
(±10CTAVESJ
•
Master
lur^e (*
100
cent)
• Poftamanto (max.
OO
sec)
•Frequency
modulation
iniensitf
byMG/T. EXT(±5V)
•
Frequency modulation
infenslty
byEGl/EXTf
+
5V)
•v.ao
-1 lew«
•v,c,0-2revef
Cutolflrequency
(50H^-I5,000H^)
•
Peak
(
Hal
-^sellOSC)
•CuLOH
frequency modulation
in-
rensity
by
MG/T.E/T
(-5V-
+5V)
CulofI Irequency modulalion
in-
lensiiy by
EGS/EXT
(-5V-+5V)
•Cutolf
frequency
tSOHz-
15,000Hi)
•Peakiliat-seilOSC)
•
CkJioM
frequancy modulation
in-
lensily
by
MG/T,EXT
t-5V-
+5V)
•Cuioll
frequency moduiaiion
in-
fensiry
by EG2/EXT
(-5V
-
4 5V)
•Delay lime
no
sac)
-ArTackiime(IOsec)
•Release time [10 sec)
- hold
hme
(20 sec)
•AnackilmellOsec)
•Decay
l>n^e(
10 sec)
•
Susiain
level
(0-5V)
• Release
limedOsec)
•Wave lorm
t
^^
-
/\
-
^i
in-
RJ
-LJl)
"Frequencytl
:
1
"'
1
.QO}
ConlEOl wtieel (center
click}
(0.1HZ-20HZ)
•
Momentary
switch
•
Volume
•LEO
{KBD
(rigger.
MG
rale)
<EXTERNALSIGNALPROCESSOfl>
1.
Conlrol section
2.
Inpur
and
ouipur
3.
Indicator (LEO}
•
inpul signal
level
[DdB
max.)
•
Low
cul
Iraquency
(SO
-
a.SOOhzJ
hfgh
cut
frequency
(100
-
5.000H2)
•
CV
adjusi
• Threshokl
level
• Signal
In (euio
pad
system)
[1.0
-+
14.0V}
•Amplitier
Out
«Band
pass
hliered
Out
•CVOut[F-V)(0-+8.4V}
•ENVOut(0- +5V)
Trig
OuL(+5V -Lao)
• Peaklndicaior
•Trigger
indicator
2.
VCO
3-
VCf
4.
VCO
4
VCF
5.
VCA
6.
EG
<PATCHPANEL>
1,
Keyboard
•
Keyboard coniroi voltage output
(enponemial)
(0- +av)
•Keyboard
ingger output
i
+ 5V-tGND)
•VCO-1
+
VCO-2
conlrol
voUege
inpui
(linear
response)
[0- +
8V)
•VCO-
2 control
voltage input
(linear
response)
fO
-SV)
-VCO'1 +
VCO
-2
extemal
Irequency
control input
(0CT/V)(45V -5V)
•Exiernai
signal
input
(3Vp-pmflji.)
•Exiernal
HP
filler
cutofl
frequency
conircl input
i20CT/V)(-5V-45V)
•Exiamal
LP
f
titer
cutolf
frequency
control Input
(20CT/VK^5V-+5V)
Total exterriai
modulation
Inpul
(T.ex[)(-5- + 5V)
• EHiemat
initial
gain
conlrol Inpul
iO-+5V}
*EG
1
envelope signal normal
output
[-5V
113
t^OV)
*EG
1
envelope signal reverse
output
U5V=*
—
c::OV}
•EG
1
+
EG
2
trigger input
•
EG
1
irigger Input
f
~Lcm)
}
EG
2
envfflope signel reverse
output
(
.^
^
OV}
•
Triangle output
I
K
-
/V
^^
tSUp-pNi OV)
• flectanglfl
output
(ITJ^ fU
^
LH)
•
Pink noise output
(5Vp-p ±20)
•VWiite
noise output (SVp-p ±20)
•Clock
trigger
lnpui(~Cj*j)
• Sample
signal input
(5Vp-p
max.)
•S/H
output (5Vp'P
majtO
•
Control voltaga inpul
(0- +
5V)
•Signal
Inpul(-5V-+5VJ
•Signal output
(-SV-
+
SV)
Conlrol
wheel
output
[-5V
^0V-»+5V]
•
Momentary
Switch output
•Signal output (2Vp'P ouTpui
In-
pedanceS.Skn)
•Head
phones
output
((8n>
1
2Dm
watts S.6)
14,
Powarconatrmption'IOwatlS
7.
WG
3.
Noise genersior
9.
Sample and hokf
10.
Modulation
VCA
11.
ManuaT
controller
12.
Signal out
13.
Headpnones
IS.
DImansiona
1G,
Weight
17.
Accessories
18.
Oplk>ns
'
569(W}
X aOSlD) X 249(H)
mm
'77kg8
'Patch
cord,
connection cord
(35
cm
n
2.
3
m
X
1
'Stand. Fiard case,
toot
pedal
(MS'01)
'Junction
box[MS
-02}