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CONTENTS

TO SERVICE PERSONNEL .......................................... 2
SPECIFICATIONS .......................................................... 3
INTERNAL VIEW ........................................................... 4
REAR PANELS .......................................................... 5~6
DISASSEMBLY PROCEDURES

...............................

7~8

BLOCK DIAGRAM ......................................................... 8
PRINTED CIRCUIT BOARD .......................................... 9
SCHEMATIC DIAGRAM .............................................. 10
PARTS LIST ........................................................... 11~15

 2005                                         All rights reserved.

This manual is copyrighted by YAMAHA and may not be copied or

redistributed either in print or electronically without permission.

SUBWOOFER SYSTEM

YST-SW012

IMPORTANT NOTICE

This manual has been provided for the use of authorized YAMAHA
Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry,
and more specifically YAMAHA Products, are already known and
understood by the users, and have therefore not been restated.

WARNING:

Failure to follow appropriate service and safety
procedures when servicing this product may result in
personal injury, destruction of expensive components,
and failure of the product to perform as specified.  For
these reasons, we advise all YAMAHA 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 believed to be accurate and applicable to the unit(s)
indicated on the cover.  The research, engineering, and service departments
of YAMAHA are continually striving to improve YAMAHA products.
Modifications are, therefore, inevitable and specifications are subject to
change without notice or obligation to retrofit.  Should any discrepancy
appear to exist, please contact the distributor's Service Division.

WARNING:

Static discharges can destroy expensive components.
Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in
the unit (heavy gauge black wires connect to this buss).

IMPORTANT:

Turn the unit OFF during disassembly and part
replacement.  Recheck all work before you apply power
to the unit.

YST-SW012

 '05.12

1 0 0 9 9 4

P.O.Box 1, Hamamatsu, Japan

SERVICE  MANUAL

Summary of Contents for YST-SW012

Page 1: ... 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 believed to be accurate and applicable t...

Page 2: ...ive harm DO NOT PLACE SOLDER ELECTRICAL ELECTRONIC OR PLASTIC COMPONENTS 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 Leakage curr...

Page 3: ... 5 mm 11 7 16 x 11 7 16 x 12 7 8 Weight 8 5 kg 18 lbs 11 oz Finish Silver color U C R T K A B G L models Black color U C R T A B G L models Cherry color R T K A B G L models Advanced YST II This subwoofer system employs Advanced Yamaha Active Servo Technology II which Yamaha has developed for reproducing higher quality super bass sound This super bass sound adds a more realistic theater in the hom...

Page 4: ...IEW 1 2 4 6 7 5 3 MAIN 1 P C B MAIN 3 P C B MAIN 5 P C B U C A B G models MAIN 4 P C B R T K L models MAIN 2 P C B MAIN 9 P C B R T K L models Power Transformer MAIN 7 P C B U C A B G models MAIN 10 P C B R T K L models 1 2 3 4 5 6 7 ...

Page 5: ...YST SW012 5 YST SW012 T model REAR PANELS R model U C models K model Power Indicator Power Indicator Power Indicator Power Indicator ...

Page 6: ...YST SW012 6 YST SW012 A model B G models L model Power Indicator Power Indicator Power Indicator ...

Page 7: ...nt Grille Ass y by lifting a metalblade up Fig 1 When installing the Front Grille Ass y apply quick drying bond or the like to dowels and then fit them into dowel holes for secure installation The Front Grille Ass y will come off easily if its dowels are fitted into dowel holes without applying quick drying bond or the like 2 Removal of Driver a Remove 4 screws 1 and remove the Driver Fig 1 b Disc...

Page 8: ...OWER SW5 4 8 2 2 6 1 9 8 10 B B B B IC6 Q5 6 D4 5 22 23 Q17 20 D7 25 R28 0 1 15 15 Q9 D2 REGULATOR Q10 D3 A N I C LIMITER Fig 2 When Checking the P C B Connect all the connectors removed during disassembly back to the original positions Spread the Rubber Sheet and Cloth for insulation purpose and place the Rear Panel Ass y on the Rubber Sheet and Cloth Fig 2 Rubber Sheet and Cloth ...

Page 9: ...WH BE WH U C A B G models R T K L models R T K L models VOLTAGE SELECTOR 220V 240V 110V 120V RE RE RE RE BL RE RE BL BL WH SP SP RE Ref no Location D1 J2 D2 H4 D3 I4 D4 H2 D5 H2 D6 G2 D7 F2 D8 C3 D22 G2 D23 G2 Semiconductor Location Ref no Location D24 J3 D25 F3 D28 I3 D29 I3 IC1 H2 IC4 B3 IC5 B2 IC6 G3 Q1 F3 Q2 F3 Ref no Location Q5 G3 Q6 G3 Q9 H4 Q10 I4 Q17 F3 Q18 F3 Q19 F3 Q20 F3 1 9 1 9 1 1 9 ...

Page 10: ... AND ICS 2SB1642 2SD2531 1SR139 400 1SS133 176 MTZJ15C MTZJ24B MTZJ5 6B 2SA970 2SC2240 2SC2878 µPC4570HA A Anode Cathode E C B B C E RBV 402 IC4 6 µPC4570HA A Dual OP Amp Vcc Vo1 Vm1 Vm1 VEE Vm2 Vm2 Vo2 Vcc 1 2 3 4 5 6 7 8 9 1 2 35 2 AC 52 0 0 2 0 2 0 2 0 2 0 2 0 0 0 0 0 0 0 2 0 2 35 0 35 0 35 1 8 1 0 0 0 0 14 5 14 5 0 0 0 0 0 15 0 29 4 29 4 30 7 35 0 14 5 15 1 14 5 29 5 29 6 0 0 23 6 1 3 0 1 8 0 ...

Page 11: ...ST 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 POINT PLST RIVET PLASTIC RIVET R ARRAY RESISTOR ARRAY R CAR CARBON RESISTOR R CAR CHP CHIP RESISTOR R CAR FP FLAME PROOF CARBON RESISTOR R FUS FUSABLE RESIST...

Page 12: ... FG644100 C CE 0 01uF 50V s D1 VC971500 DIODE BRG RBV 402 4A 200V s D2 VG440900 DIODE ZENR MTZJ15C 15V s D3 VG440900 DIODE ZENR MTZJ15C 15V P C B MAIN P C B MAIN D4 VD631600 DIODE 1SS133 176 D5 VD631600 DIODE 1SS133 176 D6 VD631600 DIODE 1SS133 176 D7 VG442500 DIODE ZENR MTZJ24B 24V D8 WG613900 LED 333GD T5 GREEN D22 23 VD631600 DIODE 1SS133 176 D24 VU264100 DIODE 1SR139 400 D25 VD631600 DIODE 1SS...

Page 13: ...pe Part No 1 0 Ω HJ35 3100 HF85 3100 1 8 Ω HJ35 3180 2 2 Ω HJ35 3220 HF85 3220 3 3 Ω HJ35 3330 HF85 3330 4 7 Ω HJ35 3470 HF85 3470 5 6 Ω HJ35 3560 HF85 3560 10 Ω HF45 4100 HF45 4100 15 Ω HJ35 4150 HF85 4150 22 Ω HF45 4220 HF45 4220 27 Ω HJ35 4270 HF85 4270 33 Ω HF45 4330 HF45 4330 39 Ω HJ35 4470 HF85 4390 47 Ω HF45 4470 HF45 4470 56 Ω HF45 4560 HF45 4560 68 Ω HF45 4680 HF45 4680 75 Ω HF45 4750 HF4...

Page 14: ...2 3 4 2 4 3 4 4 4 5 4 11 4 11 4 16 4 17 4 18 4 19 4 20 4 24 4 24 4 23 4 28 4 33 6 21 21 21 4 1 2 4 1 1 4 35 4 1 9 4 34 4 1 3 4 34 4 34 4 34 4 38 4 31 4 32 4 34 4 38 4 1 7 4 1 10 U C A B G models R T K L models 4 1 5 4 1 4 U C A B G models R T K L models 4 21 4 21 4 21 4 21 4 34 ...

Page 15: ... CABLE 2m GL 4 4 CB072750 CORD STOPPER SR 4N 4 4 5 WB408000 BINDING TIE GT 100M 4 11 WG570500 REAR PANEL UC 4 11 WG570600 REAR PANEL RTL 4 11 WG570700 REAR PANEL A 4 11 WG570800 REAR PANEL BG 4 16 WC738200 POWER KNOB 4 17 WC757900 VOLUME KNOB 4 18 WC738400 COVER P SW 4 19 WC738100 COVER TERMINAL 4 20 WC738800 PACKING COVER TERMINAL 4 21 WC785200 PACKING 6x202 t 1 4 23 WC758000 PACKING COVER P SW 4...

Page 16: ...YST SW012 ...

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