SERVICE MANUALVC-10CONTENTS . .

1. SPECIFICATIONS 2

2. STRUCTURAL DIAGRAM 3

3. CIRCUIT DIAGRAMKLM-136 4

KLM-135 5

KLM-134 6

4. PC BOARDKLM-136 7

KLM-135 8

KLM-134 9

5. BLOCK DIAGRAM 10

6. PARTS LIST (Mechanical parts not listed) 1

1

7. CHECK AND ADJUSTMENT 12

KEIO ELECTRONIC LABORATORY CORPORATIONTOKYO/JAPAN

1. SPECIFICATIONS

< Controls >1. Keyboard 32 keys F ~C

Octave range: normal 16'

up 8'

Tuning ±100 cents

Accent bend

Vibrato speed (1 Hz ~ 10 Hz)

Vibrato depth (0 ~ 100 cent P-P)

External pitch control

Pitch control wheel (±Vi octave)

2. Signal mixers Input signal balance (keyboard/

noise)

External signal level

3. Frequency response Microphone level

simulator

4. Meter VU meter

5. Final controls Ensemble

Power switch/final volume

Output balance (simulator/mike)

Headphone level

< Inputs >1. Mike inputs

2. Signal inputs

< Outputs >1. Final

2. Headphone

Power consumption

Dimensions

Weight

BTS connector input ) __

2P phone jack input

Signal input 3V p-p MAXPitch control input ( 1 /3-oct/vol

-3V-3V

Final out -10dB (output imp

ance 3KQ)

Headphone out 812 1 20mW25W499(W) x 309(D) x 249(H) mm7kg

I. STRUCTURAL DIAGRAM

Front panelRotary knob

Side pane! (left)

Control wheel holder

Rubber feet #5Main chassis

small)

Rotary knob

P (large)

/

3PBTS Connector

3. CIRCUIT DIAGRAM KLM-136

(LEVEL EXPANDER)

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KLM-135

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KLM-134

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CHANNEL 2C502-IO))/l6V C602-1>i/50V

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CHANNEL 3

R2402 R2

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R2405

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CHANNEL

9

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CHANNEL iOC5tO-2.2ji/50V C6I0 - 0.22)i/50V

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H CHANNEL 12

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1 CHANNEL 13 .

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JCHANNEL 16

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\ CHANNEL 17

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RI4 I0OQVW O ACCENT OUT

O +I5V

O GND

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KLM-135

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KORG VC-10

KLM-I35B

4. PC BOARD KLM-136

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5. BLOCK DIAGRAM

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6. PARTS LIST(Mechanical parts not listed)

•CARBON RESISTORSnot listed

•METAL FILM RESISTORS1/4W1%100Q x 1

1/4W1%1kft x 40

1/4W1%1.21K% x 40

1/4W1%4.03KQ x 1

1/4W1%5.1Kfl x 1

1/4W1%10KO x 1

1/4W1%16.9KQ x - 1

1/4W1%29.4KQ x 11

1/4W1%100KQ x 3

1/4W1%162Kfi x 1

1/4W1%200KQ x 40

1/4W1%243KH x 40

1/4W1%301KQx 1

1/4W1%402KG x 2

1/4W1%619Kfi x 32

1W1%330Q x 32

•MYLAR CAPACITORS50V- 0.00

1

MF x 4

50V - 0.0022MF x 1

50V-0.01 MF x 1

50V - 0.022MF x 6

,50V - 0.27MF x 4

50V - 0.33MF x 4

50V-0.39MF x 1

50V - 0.47MF x 3

50V - 0.56MF x 1

50V - 0.68MF x 1

50V-0.082MF x 1

•CERAMIC CAPACITORS50V - 22pF x 1

50V-47pF x 1

50V-100pFx 6

50V-120pFx 1

50V-t50pFx 1

50V-180pFx 5

50V - 220pF x 7

50V - 270pF x 1

50V-330pFx 3

50V - 390pf x 4

50V-470pF x 7

50V-680pFx 2

•TANTALUM CAPACITORS16V2.2MFx 2

•ELECTROLYTIC CAPACITORS1.6V - IQmF x 64

16V-100MF x 8

50V-1.0mF x 29

25V -2200MF x 2

•POLYPROPYLENE •SEMI-FIXED RESISTORS

CAPACITORS SR29R4.7KflBx 2

100V- 0.001 VF x 1 SR19R100KQB x 33

100V - 0.001

2

MF x 8 SR19R100KQB x 1

100V-0.0015/zF x 9 SR19R47K12B x 1

100V-0.0018MF x 8 SR19R220KQB x 2

100V-0.0022MF'x 8

100V-0.0027MF x 8 •ROTARY VARIABLE RESISTORS

100V-0.0030MF x 2 EVH-5LA802B15 x 4

100V-0.0033mF x 9 EVH-5LA802B14 x 1

100V-0.0036mF x 2 EVH-5LA802A15 x 2

100V-0.0039juF x 9 EVH-5LA802B16 x 1

100V-0.0043MF x 2 EVC-BQ5P18B14 x 1

100V-0.0047MF x 9 EVH-OFA-803B14 x 1

100V - 0.005 1 juF x 2 EVH-OFA-803B15 x 1

100V-0.0056MF x 10 EVH-RTAP20B15 x 1

100V-0.0062MF x 1 (Center click-stop)

100V-0.0068MF x 10

100V-0.0075MF x 1 •SLIDE SWITCH

100V-0.0082,xF x 10 SSB- 12208 x 3

100V- 0.009

1

MF x 1.

100V-0.000VF x 11 •KEY

100V- 0.001 ImF x 1 F-c 32 key

100V - 0.01

2

MF x 9

100V-0.013mF x 3 •PHONE JACK100V- 0.01

5

MF x 9 2P (RC-707) x 3

100V-0.016MF x 2 3P (ST) x 1

100V-0.018MF x 9

100V-0.022MF x 8 •FUSE100V-0.027MF x 8 250V-0.1A x 1

100V-0.033MF x 8

10GV-0.039mF x 8 •CONNECTORS100V-0.047MF x 8 ^ BE4P-SHF-1 x 1

100V-0.33^F x 1 BE8P-SHF-1 x 1

LBE11P-SHF-1 X 1

•TRANSISTORS /}-BS9P-SHF-1 x 1

^BS^P-SHF-I x 22SA-798G x 1

2SA-564AS x 32 BS10P-SHF-1 x 1

2SC-1685S x 5 _ BS4P-SHF-1 x 1

(special selected) Female Connectors

2SA-733K x 35 MLR-3RRC-1 x 1

2SC-945LK x 55 4PVC-1001 x 1

2SC-644R x 1 4PVC-1002 x 1

8PVC-1003 x 1

•DIODES 9P x 1

1S-1555 x 85 10P x 1

1S-1885 x 4 11P x 1

12P x 1

•IC MLP-03TRC-220 x 1

N13T-1 x 32

MN-3004 x 2

MPC-4558 x 87

,iPC-14315 x 1

mA-7915 x 1

MC-14069 x 2

NE-570 x 1

7. CHECK AND ADJUSTMENT

(refer to figures 1 and 2)

Setup for testing.

a. Connect VC-10 FINAL OUT to WT-10 (Korg

Tuning Standard) input jack.

b. Connect microphone (audio signal) to VC-10MIC INPUT.

7-1 TOTAL PITCH Adjustment.

a. Set TUNE knob to center.

b. Set OCTAVE switch to down position.

c. Play A-2 (on keyboard) and adjust VR1 so that the

WT-10A indicates the correct pitch.

d. Adjust each of the trimmer screws from F-1 to C-3

to the correct pitch as indicated on the WT-10 Ameter.

7-2 OCT UP PITCH Adjustment.

a. Set OCTAVE switch to UP position.

b. Play F-3 (on keyboard) and adjust trimmer screw

VR-2 as necessary, so that the pitch is one octave

higher than before.

7-3 SLOPE ADJUST Adjustment.

a. Play F-1 and adjust VR-3 so that the pitch is one

octave higher than before.

(Repeat adjustments 7-2 and 7-3 as many times as

needed, so that all keys stay in tune at both OCTAVEswitch positions.)

7-4 BIAS Adjustment.

a. Disconnect microphone from MIC INPUT.

b. Disconnect WT-10A, and connect FINAL OUT to

amplifier.

c. Play each of the keys on the keyboard and adjust

VR-4 just as much as necessary so that no sound

will be produced. Do not turn VR-4 further (clock-

wise) than the point where the sound first stops. If

turned too far, sensitivity to a microphone input

signal will be too low.

0.TUNE

SB"OCTAVE

at-

B Q

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B2

POWER FIN VOL

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FINAL OUT

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•TO SOUND

-TO KORG Tuning Standard WT-10A

Fig.1

PICH ADJUST

B3 *

A3 G3 F3 D#3 C*3 82 A2 G2 F2 D#2 C«2 B1 At Gl

oo A#3 G#3 F#3 E3 D3 C2 a#2 G#2 F#2 E2 02 CI A#

CIRCUIT BOARD KLM- 135

Fig. 2

L«$O

VR3 SLOPE ADJ QVRl TOTAL PITCH QVR2 OCT UP PITCH

VR4 BIAS

Circuit Board KLM- 134

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