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Yamaha YST-SW45, Service Manual, Page: 5 / 13

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Yamaha YST-SW45 Service Manual Download Page 5

YST-SW45

LIMITER

IC8

REGULATOR

POWER
SUPPLY

D1

D11

Q11

VCC

T1

SW1

D8

D19

-B

+B

POWER

LED

PWR

STANDBY/ON

SW

+15

-15

Q1,D2

Q2,D3

RY2

F1

PROTECTION

0.1

SPEAKER

RY1

D7

L.P.F

6dB/oct

2

IC9

2

4

3

IC7B

IC7A

L.P.F

12dB/oct

HIGH

CUT
VR2

8

6

7

VR3

VOLUME

L.P.F

6dB/oct

7

6

5

IC1B

IC1A

1

2

3

SIGNAL
SENSOR

IC4

TIMER

IC5

+

8

4

6
7

3

AUTO

POWER

SW2

OFF

PWR

AUTO POWER ON/OFF CIRCUIT

Q3, 6
D4,D5

+

-

-

+

+

-

-

+

L

R

L

R

L

R

INPUT 1

OUTPUT

INPUT 2

Q12

POWER

AMP

4

RY2

H.P.F

12dB/oct

H

L

IC10

+8

POWER SW

SW5

A.N.I.C

IC2,3,6

Q7

L.P.F

6dB/oct

1

13

1

2

6

4

3

15

14

13

12

7

R1

C1

TR4

TR7

TR8

TR9

TR10

TR1

TR2

TR3

TR5

R7

R9

R10

R4

R5

R3

R2

R6

D1

SUB

R8

D2

V

IN

V

OUT

GND

Vcc Vo

1

-Vm

1

+Vm

1

V

EE

+Vm

2

-Vm

2

Vo

2

Vcc

1 

2 

3 

4 

5 

6 

7 

8 

9

+

+

-

-

1

2

4

■

BLOCK DIAGRAM

■

IC BLOCK DIAGRAM

●

µ

PC4570HA (OP Amp.)

●

NJM78L08A (Voltage Regulator)

●

M51848L (CR Timer)

●

STK4036-2 (Amp.)

●

NJM4558L (OP Amp.)

●

∝

PC1237HA (Protect IC)

Summary of Contents for YST-SW45

Page 1: ...A product owners that any service required should be performed by an authorized YAMAHA Retailer or the appointed service representative IMPORTANT The presentation or sale of this manual to any individual or firm does not constitute authorization certification or recognition of any applicable technical capabilities or establish a principle agent relationship of any form The data provided is believe...

Page 2: ...PONENTS IN YOUR MOUTH FOR ANY REA SON WHATSOEVER Avoid prolonged unprotected contact between solder and your skin When soldering do not inhale solder fumes or expose eyes to solder flux vapor If you come in contact with solder or components located inside the enclosure of this product wash your hands before handling food SPECIFICATIONS Type Active Servo Processing Subwoofer System Speaker Unit 20 ...

Page 3: ...ELECTOR SER NO YST SW45 NO 50 60 Hz MADE IN MALAYSIA POWER ON OFF MODEL 120 VOLTS MADE IN MALAYSIA SER NO 80 WATTS 60Hz YST SW45 NO ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE R L L R R L OUTPUT INPUT2 AUTO STANDBY INPUT1 TOSPEAKERS FROMAMPLIFIER LOW OFF HIGH 1 2 3 4 5 Right side internal vi...

Page 4: ...Apply the block to the rear panel so as to avoid damage to the Terminal of the rear panel b Use the screwdriver inserted in the gap between the front grille and the cabinet bottom side first push up the front grille Fig 1 c Remove the front grille by lifting it up Fig 1 2 Remove of Speaker a Remove 4 screws 1 in Fig 2 and remove the speaker b Remove the cable cord 3 Removal of the Rear Panel a Rem...

Page 5: ...3 AUTO POWER SW2 OFF PWR AUTO POWER ON OFF CIRCUIT Q3 6 D4 D5 L R L R L R INPUT 1 OUTPUT INPUT 2 Q12 POWER AMP 4 RY2 H P F 12dB oct H L IC10 8 POWER SW SW5 A N I C IC2 3 6 Q7 L P F 6dB oct 1 13 1 2 6 4 3 15 14 13 12 7 R1 C1 TR4 TR7 TR8 TR9 TR10 TR1 TR2 TR3 TR5 R7 R9 R10 R4 R5 R3 R2 R6 D1 SUB R8 D2 VIN VOUT GND Vcc Vo1 Vm1 Vm1 VEE Vm2 Vm2 Vo2 Vcc 1 2 3 4 5 6 7 8 9 1 2 4 BLOCK DIAGRAM IC BLOCK DIAGR...

Page 6: ...A B C D E 1 2 3 4 5 6 7 YST SW45 From MAIN 3 SPEAKER MAIN P C B 1 From MAIN 4 From MAIN 2 From MAIN 7 5 PRINTED CIRCUIT BOARD Foil side ...

Page 7: ... 2 3 4 5 6 7 YST SW45 MAIN P C B 3 From MAIN 2 AUTO STANDBY INPUT2 OUTPUT INPUT To MAIN 1 MAIN P C B 2 To MAIN 1 To MAIN 6 From MAIN 5 To MAIN 3 To VOLTAGE SELECTOR GENERAL model 6 PRINTED CIRCUIT BOARD Foil side ...

Page 8: ... 1 2 3 4 5 6 7 YST SW45 MAIN P C B 6 To MAIN 1 From MAIN 2 From VOLTAGE SELECTOR GENERAL model POWER TRANSFORMER MAIN P C B 7 MAIN P C B 5 To MAIN 2 POWER MAIN P C B 4 To MAIN 1 7 PRINTED CIRCUIT BOARD Foil side ...

Page 9: ... 7 34 5 14 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 2 1 8 14 4 14 2 0 0 0 0 0 0 0 0 0 0 2 0 6 1 6 6 0 0 8 2 2 3 1 14 4 0 2 0 2 14 2 0 8 25 4 32 5 14 4 14 9 0 14 7 14 2 32 7 6 6 6 0 36 7 36 8 AC57 4 AC12 2 0 12 7 12 7 1 9 1 9 0 7 0 0 12 7 7 9 0 0 0 0 3 9 7 9 6 7 6 6 3 9 1 4 7 3 0 1 4 6 6 7 9 5 3 7 9 7 3 0 0 0 13 9 0 0 0 14 2 0 1 8 HAll v oltage are measured with a 10MW V DC electric volt meter HComponent...

Page 10: ...ODULE FLTR LC RF LC FILTER EMI GND MTL GROUND PLATE GND TERM GROUND TERMINAL HOLDER FUS FUSE HOLDER IC PRTCT IC PROTECTOR JUMPER CN JUMPER CONNECTOR JUMPER TST JUMPER TEST POINT L DTCT LIGHT DETECTING MODULE L EMIT LIGHT EMITTING MODULE LED DSPLY LED DISPLAY LED INFRD LED INFRARED MODUL RF MODULATOR RF PHOT CPL PHOTO COUPLER PHOT INTR PHOTO INTERRUPTER PHOT RFLCT PHOTO REFLECTOR PIN TEST PIN TEST ...

Page 11: ...C40 VF606700 C EL 1000uF 25V UCABG C40 VH620500 C EL 10uF 25V RT C41 VJ836900 C EL 10uF 16V C42 FG214100 C CE 0 01uF 50V C43 FG213100 C CE 1000pF 50V C44 VJ839100 C EL 1uF 50V C45 UA654680 C MYLAR 0 068uF 50V C46 UJ638330 C EL 330uF 16V C47 UJ648220 C EL 220uF 25V C48 UH178100 C EL 100uF 63V RT s C49 VS741700 C CE SAFTY 0 01uF 275V C50 FG214100 C CE 0 01uF 50V C51 UA654470 C MYLAR 0 047uF 50V C52 ...

Page 12: ... R MTL FLM 10KΩ 1 4W R67 HU597100 R MTL FLM 10KΩ 1 4W R68 HU597100 R MTL FLM 10KΩ 1 4W R69 HU597100 R MTL FLM 10KΩ 1 4W R80 HU597100 R MTL FLM 10KΩ 1 4W R81 HV455100 R CAR FP 100Ω 1 4W R82 HV454100 R CAR FP 10Ω 1 4W R83 HV455100 R CAR FP 100Ω 1 4W R89 VH930000 R WW 0 1Ω 3W R90 HU597100 R MTL FLM 10KΩ 1 4W R91 HU597100 R MTL FLM 10KΩ 1 4W R92 HU597100 R MTL FLM 10KΩ 1 4W R93 HU597100 R MTL FLM 10KΩ...

Page 13: ...25 5 28 5 9 4 15 5 8 5 6 3 31 4 1 4 11 4 12 4 6 11 1 5 16 31 3 2 3 1 5 17 1 2 3 2 10 5 1 7 5 1 6 5 1 4 5 1 5 1 5 5 1 5 5 5 15 5 18 5 24 5 12 5 14 5 30 5 26 5 29 5 26 5 31 5 27 5 26 5 26 5 20 5 31 5 10 5 10 5 19 5 17 5 16 31 31 31 31 R T models EXPLODED VIEW 12 ...

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