Korg POLYSIX User manual

PROGRAMMABLE 6VOC
SYNTHESIZER
SERVICE MANUAL POLYSIX

1. SPECIFICATIONS
KEYBOARD •61 keys (C -C)
VOICES: 6
(Program and edit functions are possible for items marked *)
VCO* •Octave Selector (16', 8', 4')
•Waveform (K,PW, PWM)
•Pulse Width/PWM Sensitivity Adjustment
•PWM Speed
SUBOSCILLATOR* •Off
VCF*
ENVELOPE GENERATOR*
VCA*
MODULATION GENERATOR*
EFFECT*
KEY ASSIGN MODE
ARPEGGIATOR
TUNE
BEND
OUTPUT
PROGRAMMER
TAPE INTERFACE
CONTROL WHEEL x2
INPUT JACKS
OUTPUT JACKS
DIMENSIONS
WEIGHT
ACCESSORIES INCLUDED
POWER CONSUMPTION
1oct Down
2oct Down
Cutoff Frequency Adjustment
Resonance Adjustment
Envelope Generator Modulation
Sensitivity Adjustment
Keyboard Tracking Adjustment (0 ~150%)
Attack Time
Decay Time
Sustain Level
Release Time
Mode Switch (EG,r~L)
Attenuator (-10dB ~+10dB, 11Steps)
Frequency
Delay Time
Level
Modulation (VCO, VCF, VCA)
Mode (Off, Chorus, Phase, Ensemble)
Speed/Sensitivity Adjustment
Poly
Unison
Chord Memory
Hold
Speed
(0.4Hz ~40Hz)
Range (Full, 2oct, 1oct)
Mode (Up, Down Up/Down)
Latch (On/Off)
Arpeggio (On/Off)
±50 Cents
Sensitivity Adjustment (MAX ±1300 Cents)
Level Selector (Off, Low, High)
Volume
Bank (A, B, C, D)
Program {1—8)
Write (Enable, Disable)
Switch (Enable, Disable)
To Tape
From Tape
Verify
Error/Cancel
Tape Indicator x2(Round, Loading)
Bend
MG
From Tape (With High/Low Switch)
Chord Memory dox>)
Arpeggio Trigger In Q««)
VCF fcM In (-5V -+5V)
To Tape (With High/Low Switch)
Headphone
Output
980 (W) x373 (D) x132 (W) mm
11.5 kg
Connection Cord
Plug Adaptor (Phone-To-Mini)
Memory Cassette
Voltage (Local Voltage 50/60 Hz)
Wattage (25 W)
This manual was restored and scanned by and available as afree download from synfo.nl.
So if someone charged you money for it, you know where it came from.

3.BLOCK DIAGRAM
KLM-369, 370, 371 KLM-376

KLM-366 KEY ASSIGNER (OLD PRODUCTION)
JCN05-S
AIC2 UHlSON

KL.M-366 SYNTHESIZER (OLD PRODUCTION)
5

KEYBOARD
KLM-366 (NEW PRODUCTION)
(KLM-366 includes KLM-396)
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KLM-368 EFFECT
FROM
KLM-J67 J
8

K.LM-S70
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TO
KLM-367

KLM-376, 372 425
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CONNECTOR
TA TB
VOLTAGE 100V120V220V 240V
3BROWN ORANGE YELLOW GREEN
4WH TE WH TE
NC ORANGE BROWN GREEN YELLOW
10

13

KLM-369
CN09
R3
VvV
CNOT VR Z
RI5
Wr CN06
GND RI7
VA-
RIB
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RIO
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KLM-370
ATTENUATOR
EG MODE
KBO TRACK
IRESONANCE
.
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INH-I
SP/INTENSITY
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KLM-371 IPROGRAM-8
1
SW 23
[TaPE Enable I
SW24
IWRITE ENABLE I
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15

KLM-372 KLM-396
KLM -372 B
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16

6. CONNECTOR FUNCTION
prR CONN EC-
p.c.b.T0R FUNCTION
+15
+5
GND
-5
-15
GNDA
+5A
P17
P16
P15
P14
P13
P12
P11
P10
DBO
DB1
DB2
DB3
DB4
DB5
DB6
DB7
IR
8'
4'
SI
TE
KBD TRACK
VCF MOD/CUTOFF
VCO MOD
PW/PWM
EG INT
RESO
ATTACK
DECAY
SUSTAIN
RELEASE
/I
SUB 1/2
SUB OFF
EG MODE
ARPE
POLY
UNISON
CHORD
HOLD
P17
P16
P15
P14
P13
P12
P11
P10
P20
P21
ACKR
ACKI
SIG OUT
GND A
NC
ACKI (IN)
CHORD
Fc MOD IN
ACKI (OUT)
+15
+5
GND
-5
+15
GNDA
EFF-SP/INT
CHO
PHA
ENS
VCA MOD
P-VOL
RESO
EG MODE
SUB OFF
SUB 1/2
^1
RELEASE
SUSTAIN
DECAY
ATTACK
RESO
TO
P.C.B. CONNEC-
KLM-376 01- 1
-2
CONNEC-
TOR
KEY-
BOARD
367 05- 19
18
17
•16
15
14
•13
•12
'11
•10
•9
8
>7
•6
5
4
•3
2
•1
371 12 1
•2
3
<4
5
6
•7
8
9
•10
•11
-12
13
14
15
•16
17
368 14- 1
2
3
REAR
PANEL
KLM-376 02- 1
•• 2
KLM-368 03- 7
-6
KLM-366 05- 19
18
KLM-367
KLM-367
KLM-367
KLM-368
KLM-369
KLM-369
FUNCTION
EG INT
PW/PWM
VCO MOD/CUTOFF
VCF MOD
KBD TRACK
TE
ST
4'
8'
IR
MOD
LFO
DOO
D01
D02
D03
P10
P11
P12
PI 3
TO TAPE
GND
FROM TAPE
GNDA
D03
D02
D01
DOO
P13
P12
P11
P10
004
D05
D06
D07
P26
P27
+5
GND
TE
GND
DATA
A
B
C
INH1
INH2
RESO
P, VOL
VCA MOD
ENS
PHA
CHO
EFF SP/INT
SIG IN
GNDA
NC
NC
GNDA
SIG OUT
+15
GND
-15
MOD
LFO
DOO
D01
D02
DO3
P10
P11
P12
P13
GND
PHONES
PHONES
DATA
SIG OUT
-5
BEND
+5
GND
VIB
LFO
P.C.B. TO
CONNEC-
TOR COL-
OR P.C.B. CONNEC-
TOR FUNCTION P.C.B. TO
CONNEC-
TOR COL-
OR P.C.B. CONNEC-
TOR F
10 II KLM-369 11- 4C5KLM-371 J35 1D07
9II 5INH1 1
1
62P12
"8••6INH2 •i 7•• 3+5
7•• KLM-369 13- 1+15 KLM-376 13- 1GY 4GND
KLM-366 6GR 2+5 II 2 5 TE
5*< 3GND ••3KLM-376 01- 1+15
•• 4•> 4-5 •' 42+5
3l> KLM-369 13- 5-15 KLM-376 13- 5GY 3GND
2•• KLM-369 15- 1NC KLM-368 15- 3BK 4-5
1ll 2GNDA 2.. KLM-376 01- 5-15
KLM-369 06- 1BL 3SIG IN 16GNDA
"2"KLM-369 201- 1INH-1 KLM-370 201- 17+5
"3•• 2DATA „2KLM-376 02- 1+15
"4"3A32+5
"54B„4 3 GND
"6"5C„54-5
"7"6GND II 65-15
"8•• 7-5 76GNDA
9•• 8+5 II 87+5
"10 *• 9P10 „9KLM-376 13- 1+15
REAR BR 10 P11 „10 2+5
PANEL RE 11 P12 „11 3GND
"OR 12 P13 „12 4-5
"“13 D03 1, 13 5-15
KLM-371 10- 1BR 14 D02 1, 14 KLM-376 16- 1+15
-2 2RE 15 KBD-TRACK ••15 2GND
3OR KLM-370 201- 1INH-1 KLM-369 201- 13-15
4YE 2DATA 2
II 5GR
FUNCTION
KLM-367
KLM-366
KLM-367
KIM-371
REAR
PANEL
CONTROL
PANEL |
KLM-367 11- 1
2
3
-4
B
C
GND
-5
+5
P10
P11
P12
P13
D03
002
KBD TRACK
D03
D02
D01
DOO
P13
P12
P11
P10
D04
D05
006
D07
P26
P27
+5
GND
TE
ARPE
POLY
UNISON
CHORD
HOLD
P17
P16
P15
P14
P13
P12
P11
P10
P20
P21
ACKR
ACKI
KLM-367 10- 1BR
2RE
3OR
4YE
5GR
6BL
7PU
8GY
9WH
10 BK
11 BR
12 RE
13 OR
14 YE
15 GR
16 BL
17 PU
12- 1BR
2RE
3OR
4YE
5GR
6BL
7PU
8GY
9WH
10 BK
11 BR
12 RE
13 OR
14 YE
15 GR
16 BL
17 PU
KLM-371
BROWN
ORANGE-
YELLOW -+ YE
GREEN -+ GR
P.C.B. TO
CON NEC
TOR COL-
OR
KLM-371
-3 ••
J35 1
2
3
4
5
KLM-366 01- 1BR
2'<
*< 3
4••
KLM-366 01- 5BR
"6••
7
KLM-367 02- 1RE
"2
'* 3
4
5**
6
•1 7
KLM-369 13- 1GY
•• 2
"3**
4
»' 5
KLM-368 16- 1BK
•• 2
3
BN PURPLE —>PU
RD GRAY GY
OR WHITE -WT
YE BLACK -BL
GR PINK —»PK
BU LIGHT BLUE *> LB
17

7. SEMI-FIXED RESISTORS DIAGRAM
((*) VR2, VR13, VR14, VR15-*- NEW PRODUCTION.)
18

8. ADJUSTMENT PROCEDURE
Caution: This unit has been precisely adjusted Bt the factory before shipment. Therefore, absolutely do not turn any of
the variable resistors other than those required for servicing. Testing and adjustment should be performed only after
allowing the unit to warm up for ten minutes. Variable resistor locations are marked on separate charts.
*The following are required for the test procedures:
Digital voltmeter (DVM) 4-1/2 digit
Oscilloscope
Tuner Korg WT-1 2, etc.
Audio amp and speaker, or headphones.
1.
Please check the following before proceeding.
1) Check all connections to make sure they are correct
and secure.
2) Check memory back-up battery voltage. KLM-367
circuit board battery voltage should be 3.60V 4.10V,
2.
Power supply check and adjustment (KLM-376).
Use aDVM to check the following test point (TP)
voltages. (Obtain ground in front of LED.):
1) +15V for TP-J7, Adjust VR3 to obtain +15.000V
±50mV.
2) -15V for the right side of TP-R18. Confirm -15.000
mV ±300mV.
3) +5V for TP-J2. Adjust VR2 to obtain +5,000 ±10mV.
4) -5V for TP-J1 .Adjust VR1 to obtain -5.000V ±10mV.
3.
KLM-367 check and adjustment.
(1) Reset circuit.
With controls at the normal setting (fig. 1), connect a
dummy 56kohm 2P (2-pin) connector to the KLM-376
2P plug (male). If connector not available attach 56K
resister with small test clips (E-Z-Hook or Similar)
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EFFECTS
Fig. 1Normal setting.
1) Turning VR1 from the counterclockwise position
towards the clockwise direction, adjust so that the
BANK A~D, MANUAL, TAPE ENABLE, and
PROGRAM 1~8LEDs all light up (instead of only
BANK Aand PROGRAM 1).
2) Confirm that only the BANK Aand PROGRAM 1
LEDs light up when you remove the 56kohm 2P
connector.
(2) D/A adjustment.
1) Set MANUAL to ON, CUTOFF to 10, and EFFECT
INTENSITY toO.
2) Set circuit board SW1 to TEST position.
3) Confirm that PROGRAM LEDs 1&8alone light up
when the TAPE SW is switched back and forth
from DISABLE to ENABLE and back to DISABLE.
4) If LEDs other than 1and 8light up, adjust VR6
(offset) and VR7 (width) so that only 1&8light up.
5)
Turning VR7 clockwise, adjust so that the lit LEDs
shift to 1&8. In the shift from 2&7to 1&8
there may be some time lag between the two. If this
is very large, adjust VR6 to minimize it.
o#oooo# o-+* oooooo •
12346678 123456 78
6) Switch the circuit board SW1 to the NORMAL
position. Confirm that LEDs 1&8remain lit up
without any change.
7) Confirm that output DC click noise is within 6Vp-p
when power is switched off.
8) Turn power on and confirm that the BANK ABnd
PROGRAM 1LEDs light up.