Korg MS-20 Service Manual page 2

<CONTROL SECTION>
3. VC.0.2
4, V.C.0. master
control
5. V.C.O. mixer
6. Voltage controlled
high pass fiter
7. Voltage controlled
Jow pass filter
8, Envelope
generator 1
9, Envelope
generator 2
10, Modulation
generator
11, Manual controtier
12. P. Switch and
volume
18. Indicator
*C~C37 keys (3 octaves)
*Wave form (A. N., PW (TU.
~ 1LJ), white noise) (4 modes)
'*Pulse width adjust 1: 1~ 1:20
'Wave form (IN... LL. ring
modulator) (4 modes)
'Pitch (£1 OCTAVES)
'* Master tune (+ 100 cent)
'*Portamento (max. 00 sec)
*V.C.0.-1 level
/C.0.-2 level
'*Cutott frequency
(S0H2~ 15,000H2)
'*Peak (Nlat~self OSC)
'*Cutotf frequency modulation in-
tensity by MG/T.EXT
(-5V ~ +5v)
*Cutolt frequency modulation in-
tensity by EG2/EXT
(-5V ~ +5)
*Cutott frequency
(80Hz~ 15,000H2)
'*Peak (tiat~self OSC)
'*Cutotf frequency modulation in-
tensity by MG/T.EXT
(-5V ~ +5v)
'Delay time (10 sec)
'Attack time (10 sec)
'* Release time (10 sec)
'* Hold time (20 sec)
'Attack time (10 sec)
'Decay time (10 sec)
'*Sustain level (0~5V)
'*Release ime (10sec)
Frequency (1:1 ~ 1:80)
'*Momentary switch
eo
*Volume
'*LED (KBD trigger, MG rate)
< EXTERNAL SIGNAL PROCESSOR >
1. Control section
2. Inputand output
'input signal levet (0d8 max.)
Low cut frequency
(60 ~2,500H2)
'High cut frequency
(100 ~ 5,000H2)
*CVadjust
'* Threshold level
'*Signal In (auto pad system)
(1.0 ~+ 14.0V)
'*Ampiifier Out
'*Band
pass fitlered Out
*CV Out (FV) (0 ~ +8.4V)
'ENV Out(0~ +5V)
'*Trig Out(+5V oro)
'Peak indicator
'Trigger indicator
<PATCH PANEL>
2
10.
12.
13,
14,
15.
16.
17.
18.
|. Keyboard '* Keyboard control voltage output
(exponential) (O~ +8V)
'Keyboard trigger output
(+5V Xoo)
*VCO-1 + VCO-2 control
voltage input (linear response)
(0~+8v)
*VCO-2 control voltage input
{linear response) (0 ~ 8V)
veo *VCO-1 + VCO-2 extemal
frequency control input
(OCTM)(+5V -5V)
vor '*Exemal_ signal input
(3Vp-pmax.)
*Exiemal HP filter cutoff
frequency control. input
(20CT/V)(-5V~ +5V)
*Exenal LP filler cutoff
frequency control input
(20CT/V)(-5V~ +5V)
VCO+VCF —— *Total external modulation input
(T.ext) (-5~ +5V)
eA + External initial gain contro input
(0~+5v)
&G
EG 1 envelope signal normal
'output ( SV =7—X= 0V)
EG 1 envelope signal reverse
'output (+5V = OV)
EG 1 + EG 2 tigger input
(oo)
'EG 1 trigger input ("Lono)
*EG 2 envelope signal reverse
'output (.4y—£.0V)
MG * Triangle output (\~ \ ~ A)
(SVp-p-h-0V)
'*Rectangle output (U~ MU ~
un
(wee)
Noise generator * Pink noise output (5Vp-p #20)
'*White noise output (SVp-p +20)
) . Sample and hold *Clock trigger input (2 cro)
"Sample signal input (8Vp-p
max)
S/H output (5Vp-p max.)
Modulation VCA — *Contro! voltage input (0~ + SV)
'Signal input (-5V~ +5V)
'Signal output (-5V~ +5V)
Manual controller *Control whee! output
(-5V + OV +5V)
'*Momentary switch output
(oo)
'Head phones 'Head phones output ((80)
120m watts 5.6)
Power consumption® 10 watts
Dimensions '*569(W) x 309(D) x 249(H) mm
Accessories 'Patch cord, connection cord
(35m
x 2,3mx 1)
'*Junetion box (MS-02)