background image

XK-3

00228-24286

MGH-91A

Xk-3

SYSTEM & DSP SECTION

C161

0.1u

+3.3VD

A0

2

A1

3

A2

4

A3

5

A4

6

A5

7

A6

8

A7

9

B0

18

B1

17

B2

16

B3

15

B4

14

B5

13

B6

12

B7

11

E

19

DIR

1

Vcc

20

GND

10

U35

74LVC245APW

A0

2

A1

3

A2

4

A3

5

A4

6

A5

7

A6

8

A7

9

B0

18

B1

17

B2

16

B3

15

B4

14

B5

13

B6

12

B7

11

E

19

DIR

1

Vcc

20

GND

10

U46

74LVC245APW

D0
D1
D2

D3
D4
D5
D6

D7

D8
D9
D10
D11

D12
D13
D14

D15

C64

0.1u

C162

0.1u

C163

0.1u

2

3

1

U48A

74LVC02APW

5
6

4

U48B

74LVC02APW

8
9

10

U48C

74LVC02APW

ADMCK

P2_SCKR

MIX_DOUT

P2_LRCKR

A0

5

A1

4

A2

3

A3

2

A4

1

A5

44

A6

43

A7

42

A8

27

A9

26

A10

25

A11

24

A12

22

A13

21

A14

20

D0

7

D1

8

D2

9

D3

10

D4

13

D5

14

D6

15

D7

16

CE

6

WE

17

OE

41

Vcc

11

GND

12

A15

19

A16

18

UB

40

NC

28

NC

23

D8

29

D9

30

D10

31

D11

32

D12

35

D13

36

D14

37

D15

38

LB

39

Vcc

33

GND

34

U49

IS62LV12816ALL-70T

R142

33

R143

33

R144

33

R145

33

R146

33

R147

33

R148

33

R149

33

R150

33

R151

33

R152

33

R153

33

R154

33

R155

33

R156

33

R157

33

R158

33

R159

33

R160 33

R161

33

R162

33

R163

33

R164

33

R165

33

R166

33

R167

33

R168

33

R169

33

R170

33

R171

33

R172

33

R173

33

R174

33

R175

33

R176

33

R177

33

EMD0
EMD1

EMD2
EMD3
EMD4

EMD5
EMD6
EMD7

EMD8
EMD9
EMD10
EMD11

EMD12
EMD13
EMD14

EMD15

EMD0
EMD1
EMD2

EMD3
EMD4
EMD5
EMD6

EMD7
EMD8
EMD9

EMD10
EMD11
EMD12

EMD13
EMD14
EMD15

+3.3VD

CLKX0
DX0
FSX0

CLKX1

DX1
FSX1

R33

10K

DSP RESET

RESET/E

A4
A3
A2
A1

+3.3VD

C173

10uF/20V OS

C12
0.1u

11

12

13

U48D

74LVC02APW

VCC

14

GND

7

U48E

74LVC02APW

C164

0.1u

+3.3VD

+3.3VD

R126

R127

R131

4700

R132

4700

R34 10K

R35 10K

R36 10K

R37 10K

R38
10K

R39 10K

R40 10K

R41 10K

R42 10K

+3.3VD

+3.3VD

+3.3VD

R8

1000

R9

1000

R10

1000

R11

1000

NOT USED

R133
4700

R128

NOT USED

EA2

Y6

EA3

V7

EA4

W7

EA5

V8

EA6

W8

EA7

Y8

EA8

V9

EA9

Y9

EA11

W13

EA12

V14

EA13

W14

EA14

Y14

EA15

W15

EA16

Y15

EA17

V16

EA18

Y16

EXT_INT4

C2

NMI

C13

HD10

B16

FSR0

J3

ED3

L19

ED4

M19

HAS

E18

HD8

B17

HD9

C16

BUSREQ

J19

HOLDA

J18

HOLD

J17

HD0

E20

HD1

D20

HD2

D18

HD3

C20

HD4

C19

EA10

V10

CE2

W6

CE0

V17

CE1

W18

TD1

A7

ED5

M20

HD5

B18

HD6

C17

HD7

A18

EA19

W17

EA20

Y18

CE3

V6

ARE

V11

AOE

W10

AWE

V12

ARDY

Y5

ECLKIN

Y11

ECLKOUT

Y10

BE0

V20

BE1

U19

BE2

Y4

BE3

V5

ED0

K18

ED1

K19

ED2

L18

ED30

P3

RSV

B5

DR0

J1

TMS

B7

TD0

A8

TCK

A6

EMU0

D9

EMU1

B9

CLKOUT3

D10

EMU3

B10

EMU4

C11

EMU5

B12

TRST

B6

ED11

R19

ED7

N19

ED8

N20

ED9

P18

ED10

P20

RSV

A12

ED27

R2

ED28

P1

ED18

Y3

HINT

J20

ED6

N18

ED12

R20

ED13

T18

CLK IN

A3

RSV

D7

CLKOUT2

Y12

CLKMODE0

C4

HR/W

G20

HCNTL1

G19

HCNTL0

G18

HHWIL

H20

HCS

F20

HD15

B14

CLKS0

K3

CLKR0

H3

HD11

A16

HD13

A15

HD12

C15

HD14

C14

RESET

A13

HRDY

H19

EXT_INT5

C1

EXT_INT6

D2

HDS2

F18

HDS1

E19

EXT_INT7

E3

CLKS1

E1

CLKR1

M1

DR1

M2

FSR1

M3

ED14

T20

ED15

T19

ED16

V4

ED17

W4

ED19

V2

ED20

V1

ED21

U2

ED22

U1

ED23

U3

ED24

T1

ED25

T2

ED26

R3

ED29

P2

ED31

N3

CLKX0

G3

DX0

H2

DX1

L2

FSX0

H1

CLKX1

L3

FSX1

L1

EA21

U18

RSV

C12

RSV

D12

RSV

A5

EMU2

D3

RSV

N2

TOUT1

F1

TINP1

F2

TOUT0

G1

TINP0

G2

PLLVH

C5

RSV

B11

U2A

TMS320C6711CGDP

R134

4700

R44

10K

R45 10K

A[0..17]

U1 address BUS

A[0..17]

RD

DSP_CE

WRH

DSP RESET

RESET/E

CARD REDY

CARD WAIT

CARD INPAC

OE

1

GND

2

OUT

3

VDD

4

X4

SG-636PCE  25MHz

C65

0.1u

+5V

A0

2

A1

3

A2

4

A3

5

A4

6

A5

7

A6

8

A7

9

B0

18

B1

17

B2

16

B3

15

B4

14

B5

13

B6

12

B7

11

E

19

DIR

1

Vcc

20

GND

10

U42

74LV245APW

C66

0.1u

D0
D1
D2
D3
D4
D5
D6
D7

FL32

C114

FL33

C115

FL34

C116

FL35

C117

C118

FL37

C119

FL38

C120

D0
D1
D2
D3
D4
D5
D6
D7

GND

SW INPUT PORT

+5V

A0

2

A1

3

A2

4

A3

5

A4

6

A5

7

A6

8

A7

9

B0

18

B1

17

B2

16

B3

15

B4

14

B5

13

B6

12

B7

11

E

19

DIR

1

Vcc

20

GND

10

U43

74LV245APW

C67

0.1u

R47

1500

R48

1500

R49

1500

R50

1500

R51

1500

R52

1500

R53

1500

R54

1500

R55

10k

R56

10k

R57

10k

R58

10k

R59

10k

R60

1500

R61

10k

R62

10k

+5V

+5V

C98 0.01u

16BIT OUT

+5V

C99

0.01u

RD

9

10

8

U12C

74LV32APW

OE

1

Q0

19

D0

2

Q1

18

D1

3

Q2

17

D2

4

Q3

16

D3

5

Q4

15

D4

6

Q5

14

D5

7

Q6

13

D6

8

Q7

12

Vcc

20

GND

10

D7

9

CK

11

U44

74LV574APW

OE

1

Q0

19

D0

2

Q1

18

D1

3

Q2

17

D2

4

Q3

16

D3

5

Q4

15

D4

6

Q5

14

D5

7

Q6

13

D6

8

Q7

12

Vcc

20

GND

10

D7

9

CK

11

U45

74LV574APW

D8
D9
D10
D11
D12
D13
D14
D15

D8
D9
D10
D11
D12
D13
D14
D15

D0
D1
D2
D3
D4
D5
D6
D7

MCS2

MCS1

MD

MC

MCS3

1

2
3
4

5
6
7

8
9

10

J117

B10B-PH

FL39

C121

FL40

C122

16OUT CE

16OUT CE

16IN CE

RD

FOOT SW3

LES DETECT

D[0..15]

D[0..15]

33pF x 9

FB2 EXCCET103U

D[0..15]

D[0..15]

FOOT SW1

FOOT SW2

FL36

FL43

+3.3VD

+3.3VD

16IN CE

WRH

WRH

DR1

DR1

R43

10K

R209

100

C160
0.1u

+3.3VD

G1

1

Y1

18

A1

2

Y2

17

A2

3

Y3

16

A3

4

Y4

15

A4

5

Y5

14

A5

6

Y6

13

A6

7

Y7

12

A7

8

Y8

11

Vcc

20

GND

10

A8

9

G2

19

U47

74LVC541APW

C233
0.1u

+3.3VD

G1

1

Y1

18

A1

2

Y2

17

A2

3

Y3

16

A3

4

Y4

15

A4

5

Y5

14

A5

6

Y6

13

A6

7

Y7

12

A7

8

Y8

11

Vcc

20

GND

10

A8

9

G2

19

U56

74LVC541APW

CARD RESET

SIO RESET

DSP RESET

VASE_RESET

KEYSCAN RESET

VASE_RESET

KEYSCAN RESET

MAIN OFF
DB MUTE

C100
0.01u

+5V

VCC

14

GND

7

U12E

74LV32APW

C239

0.01u

+5V

VCC

14

GND

7

U17E

74LV32APW

4
5

6

U17B

74LV32APW

9

10

8

U17C

74LV32APW

12

13

11

U17D

74LV32APW

DSP RESET
SIO RESET
CARD RESET

9

10

8

U40C

ADMCK

P2_ADMCK

R100

100

R188

100

R250

100

R252 100

RA21

4-100

RA22

4-100

74LV08APW

R46
10k

R246
4700

R247
4700

R248
4700

R249
4700

R254
4700

R251 100

R255
10K

+5V

+5V

7-6

Summary of Contents for XK-3

Page 1: ...SERVICE MANUAL SUZUKI MUSICAL INST MFG CO LTD 25 12 RYOKE 2 CHOME HAMAMATSU JAPAN 1 NOV 2004 CAUTION see safety notice inside...

Page 2: ...screw heads knobs and control shafts escutcheon etc and measure the voltage drop across the network Reverse the line plug and repeat the measurements Any reading of 4 volts RMS or more is excessive a...

Page 3: ...NG BOARD ASS Y LIST 7 SCHEMATICS MGH 91A 1 8 8 8 PAH 72A MXH 35A SWH 503A VRH 29A SWH 503A 504A IFH 18A PSH 72B PSH 83D KCH 16A 17A 18A 8 PARTS LIST 9 DISASSEMBLING PROCEDURE 10 WARNING 11 TECHNICAL D...

Page 4: ...OVER DRIVE 8 MODES BASS MID TREBLE PEDAL DRAWBARS PITCH BEND MODULATION SLOW FAST ON OFF BRAKE THRU ON V1 V2 V3 C1 C2 C3 With 6 POS ROTARY KNOB SECOND THIRD DECAY FAST SOFT MANUAL BASS SPLIT TUBE AMP...

Page 5: ...TONE EXP REVERB EFFECT U33 PCM1791 D A U37 VASE3 SLAVE 64POLY TONE GENERATOR VIBRATO CHORUS DIVIDING NET WORK AC 220V J110 J111 J115 SWH 505A LES SW ENDBLOCK ASSY WHEEL ASSY J530 KCH 17A 32KEY CONTAC...

Page 6: ...STA L LES1ch 2 or 3ch LESLIE OFF d STA R 4 4 a NOISE LINE OUT L b LINE OUT R c LINE OUT R ANY KEY d 11P ROT STEP SUBJECT PLAY KEYS AC LINE See below PSH 72B J2 3 DC 5V 5 MXH 35A PSW 2 DC 15V 5 MXH 35A...

Page 7: ...03 J505 J508 J507 J504 J509 J503 J501 J506 J502 FJ1 J510 SWH 503A SWH 503A SWH 504A 2 3 SWH 504A 3 3 SWH 504A 1 3 VRH 29A J520 J522 J521 PSH 72B J1 J2 J3 J4 AC INLET POWER SWITCH PSH 83D J14 J13 J11 J...

Page 8: ...7 17 GRY KSELF4 2 6 BRN LED 1 18 18 GRY KSELS4 3 7 RED LED 2 19 19 GRY KSELF5 4 8 ORG LED 3 20 20 GRY KSELS5 5 9 PNK LED 4 J114 1 J202 4 SHIELD MXH 35A A GND 6 10 GRN LED 5 2 J202 1 WHT MXH 35A PERCUS...

Page 9: ...8 3 BLK GND 6 6 BLU POWER ON 9 2 YEL 5V 7 7 VIO FAST 8 8 GRY SLOW 9 NC J301 1 J203 5 WHT MXH 35A A GND 10 NC 2 7 RED MIX OUT 11 11Pin 9 WHT LESLIE 11Pin B 3 6 SHIELD A GND J205 1 J116 11 RED MGH 91A...

Page 10: ...T D 11 7 BLU LED6 2 NC J503 1 J117 9 WHT MGH 91A D0 3 J104 1 ORG MGH 91A ROT IREQ 2 8 GRY D1 4 J104 3 BRN MGH 91A ROT R 3 7 VIO D2 FJ1 1 FJ1 1 BRN SWH 503 2 2 COM2 4 6 BLU D3 2 2 RED LED1 5 5 GRN D4 3...

Page 11: ...H 35A AG 3 9 GRY SEL2 J2 1 NC 4 8 VIO AN1 2 J101 4 YEL MGH 91A DG 5 7 BLU AN2 3 J501 1 YEL SWH 503A 5V 6 6 GRN AN3 4 J101 2 BLK MGH 91A 5V 7 5 PNK AN4 5 J 501 4 BLK SWH 503A RESET 8 4 ORG AN5 J3 1 J30...

Page 12: ...N No PIN No COLOR NAME FJP1 1 FJPI 1 BLK KCH 17A KD8 2 BLK KD9 3 BLK KD10 4 BLK KD11 5 BLK KD12 6 BLK KD13 7 BLK KD14 8 BLK KD15 FJP2 1 FJP 2 BLK KCH 17A KSELF5 2 BLK KSELS5 3 BLK KSELF4 4 BLK KSELS4...

Page 13: ...7206 PANEL SW L SWH 503A 00225 41286 VIBRATO ROTARY SWITCH VRH 29A 00225 42201 PANEL SW R SWH 504A 00225 41291 ENDBLOCK L SW SWH 505A 00225 41296 DRAWBAR I F IFH 18A 00232 14271 POWER SUPPLY PSH 72B 0...

Page 14: ...100 R81 100 R82 100 R83 100 R84 100 R85 100 R86 100 R87 100 RESET M CSB M_VASE_CE KEYSCAN_CE LED_CE SIO_CE TXD1 RXD1 MD1 RESET FWP 5V GND AN3 AN4 AN5 AN6 AN7 AN2 GND ANSEL0 ANSEL1 5V AN1 PE2 ROT R ROT...

Page 15: ...15pF C124 15pF R118 1M R120 470 5 6 U9C 74LVCU04APW 3 4 U9B 74LVCU04APW R122 10 X2 16MHz 16MHz2 RESET A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 E 19 DIR 1...

Page 16: ...K9 Vss L9 Vss L10 Vss L11 Vss L12 Vss M9 Vss K10 Vss M10 Vss M11 Vss K12 Vss C6 Vss M12 CVDD A4 Vss Y20 U2B TMS320C6711CGDP R27 10K 3 3VD D15 RD2 2FB2 1W DIP 3 3VD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...

Page 17: ...ND 8 LRCK 1 SCK 5 VDD 7 BCK 2 DATA 3 AGNDR 11 VOUTR 12 AGNDF 9 RST 6 MS 28 MUTE 4 ZEROR 22 MDO 25 MC 27 VCCR 10 VCCL 20 AGNDL 19 VOUTR 13 VCOM 14 VCCC 15 AGNDC 16 VOUTL 17 VOUTL 18 VCCF 21 ZEROL 23 MS...

Page 18: ...WMD14 27 WMD15 26 WMOEn 24 WMWEn 23 EMA16 ERASN 103 EMA15 ECASN 104 EMWEn 132 Vdd 126 NC 76 WMCS0 22 WMCS1 21 WMCS2 20 WMCS3 19 ADMCK 47 EXIN1 96 EXIN2 97 EMD0 131 EMD1 130 EMD2 129 EMD3 128 EMD4 127...

Page 19: ...HWIL H20 HCS F20 HD15 B14 CLKS0 K3 CLKR0 H3 HD11 A16 HD13 A15 HD12 C15 HD14 C14 RESET A13 HRDY H19 EXT_INT5 C1 EXT_INT6 D2 HDS2 F18 HDS1 E19 EXT_INT7 E3 CLKS1 E1 CLKR1 M1 DR1 M2 FSR1 M3 ED14 T20 ED15...

Page 20: ...0460 C219 0 1u SB3 SBT0460 C220 0 1u SB4 SBT0460 C221 0 1u 5V 5V R179 1000 R119 1M R180 1000 R136 330 R74 220 R75 220 X0 12 X1 14 X2 15 X3 11 Y0 1 Y1 5 Y2 2 Y3 4 INH 6 A 10 B 9 X 13 Y 3 GND 8 VCC 16 V...

Page 21: ...8 9 10 11 12 13 14 15 16 17 18 19 20 J111 XG4A 2031 FL53 FL58 FL59 FL60 FL61 FL62 FL63 FL54 FL55 FL56 FL57 DK0 DK1 DK2 DK3 DK4 DK5 DK6 DK7 DK8 DK9 DK10 DK11 DK12 DK13 DK14 DK15 KSELF4 KSELS4 KSELF5 KS...

Page 22: ...7 2 2u 50V MS C8 2 2u 50V MS 15V R32 220K C20 NO USE C31 1u25V 220V 250VAC 250VAC AG OUT AG LF OUT V HF IN V HF OUT V LF IN V HF ATT R50 NU R45 10K R54 4700 NC R56 10K R51 10K R53 4700 Q2 2SC2878 5V Q...

Page 23: ...50V MS 3 2 1 U3A uPC4570C C17 1800p C18 330p R21 10k R100 15k R22 10k R24 1k C16 2 2u 50V MS 5 6 7 U3B uPC4570C D1 1SR139 400 8 4 U3C UPC4570C MAIN R NC R94 100k R38 680 D4 1SS133 C48 0 1u 25v HEAD P...

Page 24: ...100 1 2 3 4 5 6 7 8 9 J503 S9B PH SW8 COM0 COM3 LED2 1 2 3 4 5 6 7 8 9 10 J509 B10B PH COM1 COM5 1 3 2 1 3 2 VR1 RK14K12D 5KB MASTER VOLUME MXH 35A J206 MXH 35A J206 MXH 35A J206 IN R AG OUT R 1 3 2 V...

Page 25: ...SW 0 SW 1 SW 2 LED 0 LED 1 COM 2 COM 4 SW1 SW 6 SW 8 LED 2 LED 3 SW7 SW 7 1 2 3 4 5 6 7 8 9 10 11 12 J520 B12B PH LED2 R2 68 LED7 R7 68 Bass SUS Bass SUS 1 2 3 4 5 J522 S5B PH SWH 505A ASSY ENDBLOCK L...

Page 26: ...A 4 2 1 1 3 5 8 16 1 1 3 2 2 3 5 1 3 NC R37 10 1 2 3 4 J513 B4B XH A PEDAL DRAWBAR 8 16 LOWER DRAWBAR 1 2 3 4 5 6 7 8 9 10 11 12 J514 B12B XH A 4 2 1 1 3 5 8 16 1 1 3 2 2 3 5 1 3 NC NC R25 10 R22 47 T...

Page 27: ...06AHF D1 DBF10C D4 DBF40C F2 T800mA F3 T800mA F4 T3 15A D5 1SS133 from POWER TRANS MXH 35A J207 2 MXH 35A J207 6 MXH 35A J207 3 18V AG 18V MGH 91A J101 4 MGH 81A J101 1 for Reset DG 5V 1 2 3 4 J3 5045...

Page 28: ...2 3 J13 5273 03A 1 2 3 J12 5273 03A SW1 HXW0131 01 040 R46KI2470M DE1E3KX102MA5BA01 DE1E3KX102MA5BA01 DE2F3KH103MA3B DE2F3KH103MA3B VOLTAGE SELECTOR SWITCH FUSE CLIP 085PN 0829 0819 100V 120V 240V AC...

Page 29: ...D23 B0 C0 FJP1 JUMPERMIN FJP2 JUMPERMIN 17S4 17F4 17F5 17S5 JUMPERMIN JUMPERMIN 18F0 18S0 18F1 18S1 18F2 18S2 18F3 18S3 17F4 17S4 17F5 17S5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 J802 XG4A 1634 D4 D2...

Page 30: ...ZnB Machine Screw M4x5 Bind ZnB Rosette Washer 5 ZnB Top Panel K3 Ass y Drawbar Cover K3 Drawbar Panel K3 Ass y Bottom Panel K3 Ass y Machine Screw M3x6 Bind ZnB Key Felt 10x1015 00623 53006 00703 240...

Page 31: ...Board K3 Ass y Screw 4x16 Truss ZnB Product Label 100V Product Label 120V UL Product Label 220 230V CE Product Label 230 240V 00703 53006 66681 04101 00703 64016 00412 02079 00412 02080 00412 02081 0...

Page 32: ...g Plate for Rotary Knob Lens Single Lens K3 Top Panel K3 Silk SW PWB K3 L Ass y Tapping Screw TYPE2 3x6 Bind ZnB SW PWB K3 R Ass y Top Panel BKT K3 1 Tapping Screw TYPE2 3x4 Flat Head ZnB Rotary Knob...

Page 33: ...L Side Panel K3 R Support Wood K3 Side BKT K3 L Side BKT K3 R Bottom Panel K3 Silk Main Board Cover K3 Rear Board K3 Rubber Foot with K 12W Coating Clip CS 2 Mschine Screw M3x6 Bind ZnB Grommet NGK 0...

Page 34: ...ew M4x5 Bind ZnB Tapping Screw P Tite 3x8 Bind ZnB Nylon Rivet P3045BLK Tapping Screw TYPE2 With Washer 3x10 ZnY BH 73L Key Board Ass y Jack Nut M9 HLJ0990 01 240 Jack Nut M12 HLJ0990 01 250 Machine S...

Page 35: ...g Screw TYPE2 3x6 Bind ZnB Grommet NGK 012 Coating Clip CS 2 00225 41296 00452 40176 00451 40467 00105 17243 00402 31008 00402 31015 Tapping Screw TYPE2 3 5x8 Bind ZnB Coating Clip CS 2 Tapping Screw...

Page 36: ...7 SWITCH PWB K3 L ASS Y 66681 02301 Hexagon Nut TYPE1 M2 ZnW Spacer C2002 5 4 Key Top XB I LCD Unit Ass y Key Top K3 R Key Top K3 GRY Key Top K3 BLK SWH 503A PWB Ass y Machine Screw M2x8 Bind ZnW 6 7...

Page 37: ...9 BH 73L KEYBOARD ASS Y 00289 01002 00225 41291 00452 40038 00452 40037 00452 40039 1 2 3 4 SWH504A PWB Ass y Key Top XB G Key Top XB I Key Top XB S 1 2 3 4 4 6 7 1 2 2 2 2 2 3 4 5 8 9 10 11 14 12 13...

Page 38: ...31 00229 22236 00452 40080 00289 01207 00453 40261 00451 40478 00453 40156 00289 01122 00289 01122 8 00289 01122 5 00280 21009 00280 21010 6 7 1 2 3 4 5 8 9 10 11 12 13 14 20 15 16 17 18 19 21 22 Whit...

Page 39: ...00457 40095 00457 40096 00457 40096 00457 40096 00457 40096 100V 00439 02002 120V UL 00439 01004 220V CE 00439 01005 240V BS 00439 01033 240V SAA 00439 01006 100V 120V UL 230V CE 240V BS 240V SAA Jap...

Page 40: ...head ZnB B from the top panel Remove the 2 screws M4x5 Bind ZnB C from the top panel Remove the 4 screws M3x6 Bind ZnB D from the top panel Disconnect the wirings from J501 J502 J503 J510 on SWH 503A...

Page 41: ...art No Only Use of another battery may present a risk of fire or explosion Battery may explode if mistreated Do not recharge disassemble Collect used battery promptly Keep away from childern Do not di...

Page 42: ...or U1 a 7818 creates the 18volts and U2 a 7918 creates the 18volts 3 Main CPU Sound generator and DSP Board MGH 91A This board has two CPUs two VASE3 sound generators a digital signal processor and th...

Page 43: ...converters The output of U32 is the upper lower and percussion drawbars split into HF and LF these signals will go to the mixer board and then out to the Tube overdrive circuit PAH 72A The output of...

Page 44: ...s shaft The switch assembly will then drop down and out of the control panel 7 Vacuum Tube Overdrive Board PAH 72A The Tube overdrive board consists of opamp U1 dual VCA ICs U2 U3 Tubes V1 V2 and a 2...

Page 45: ...A D converter on MGH 91A After the DSP signal processing and D A conversion The Left and Right audio signals return to the mixer board to U3A and U3B Op amps U3 provide a cut off frequency of 20kHz or...

Page 46: ...g the REC JUMP Button until Loading Default appears on the Display d If everything is in order PLAY Mode appears on the Display Completed 2 HOW TO CHECK THE VERSIONS a Touch the MENU EXIT button to di...

Reviews: