Yamaha YST-SW030 User manual

YST-SW030/
YST-SW010
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.
■CONTENTS
TO SERVICE PERSONNEL .......................................... 2
SPECIFICATIONS / 参考仕様 .................................... 3~4
INTERNAL VIEW ........................................................... 4
REAR PANELS .......................................................... 5~8
DISASSEMBLY PROCEDURES/分解手順 ........... 9~10
BLOCK DIAGRAM ....................................................... 10
PRINTED CIRCUIT BOARD .................................. 11~12
SCHEMATIC DIAGRAM ........................................ 13~14
PARTS LIST ........................................................... 15~25
100886
P.O.Box 1, Hamamatsu, Japan
SERVICE MANUAL
SUBWOOFER SYSTEM
YST-SW030/YST-SW010

YST-SW030/YST-SW010
2
YST-SW030/
YST-SW010
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
■TO SERVICE PERSONNEL
1. Critical Components Information
Components having special characteristics are marked s
and must be replaced with parts having specifications equal
to those originally installed.
2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
●Meter impedance should be equivalent to 1500 ohm shunted
by 0.15µF.
“CAUTION”
“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2A (YST-
SW030) / 1.6A (YST-SW010), 125V FUSE.”
CAUTION
F1: REPLACE WITH SAME TYPE 2A (YST-SW030) / 1.6A (YST-SW010), 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2A (YST-SW030) / 1.6A (YST-SW010), 125V.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic
(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency
(and possibly other entities) to cause cancer and/or birth defects or other reproductive 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 current must not exceed 0.5mA.
●Be sure to test for leakage with the AC plug in both polarities.
この製品に使用されているMAINP.C.B.のハンダ面のハンダ付け
には、Sn+Ag+Cu（錫+銀+銅）の合金である無鉛ハンダが使用さ
れています。
無鉛ハンダにはいくつかの種類がありますが、修理時には下記の
ような無鉛ハンダの使用を推奨します。
・Sn+Ag+Cu（錫+銀+銅）
・Sn+Cu（錫+銅）
・Sn+Zn+Bi（錫+亜鉛+ビスマス）
注意：
① 無鉛ハンダの融点温度は通常の鉛入りハンダに比べ30〜40℃
程度高くなっていますので、それぞれのハンダに合ったハンダ
ごてをご使用ください。
② 鉛入りハンダを使わざるを得ない場合は、あらかじめ交換する
部品端子部やその周辺部の無鉛ハンダをすべて取り除くか、あ
るいは無鉛ハンダと鉛入りハンダが十分に溶けた状態となるよ
うにハンダ付けしてください。
The foil side of MAIN P.C.B. used for this product are
soldered with lead free soldering material which is an
alloy of Sn+Ag+Cu (tin + silver + copper).
Among some types of lead free solder currently available,
it is recommended to use one of the following types for the
repair work.
• Sn + Ag + Cu (tin + silver + copper)
• Sn + Cu (tin + copper)
• Sn + Zn + Bi (tin + zinc + bismuth)
Caution:
1. As the melting point temperature of the lead free solder is
about 30°C to 40°C (50°F to 70°F) higher than that of the lead
solder, be sure to use a soldering iron suitable to each solder.
2. If lead solder must be used, be sure to remove lead free solder
from each terminal section of the parts to be replaced and
from the area around it completely before soldering, or make
sure that the lead free solder and lead solder melt together
fully.
About Lead Free Solder / 無鉛ハンダについて

YST-SW030/YST-SW010
3
YST-SW030/
YST-SW010
■SPECIFICATIONS / 参考仕様
Type / 型式 ....... Advanced Yamaha Active Servo Technology
Output Power / 出力 (100 Hz, 5 ohms, 10% T.H.D.)
[YST-SW030] ................................................................. 75 W
[YST-SW010] ................................................................. 50 W
Input Sensitivity / 入力感度 (50 Hz, 5 ohms)
INPUT (PJ)
[YST-SW030] ................................................... 70 mV (75 W)
[YST-SW010] ................................................... 50 mV (50 W)
Dynamic Power / ダイナミックパワー (5 ohms)
[YST-SW030] ............................................................... 130 W
[YST-SW010] ............................................................... 100 W
Input Impedance / 入力インピーダンス
INPUT (PJ) ............................................................. 12 k-ohms
Frequency Response / 再生周波数帯域
[YST-SW030] ................................................ 28 Hz to 200 Hz
[YST-SW010] ................................................ 30 Hz to 200 Hz
Driver / スピーカーユニット (Magnetic Shielding Type)
[YST-SW030] ................................................ 8" (20 cm) cone
[YST-SW010] ............................................. 6.5" (16 cm) cone
Input Section / 入力部
INPUT ............................................................... RCA Pin Jack
Operation Section / 操作部
Rear Panel .... Power Switch, Volume Control, LED Indicator,
Voltage Selector (L, R, T, K models)
Power Supply / 電源
U, C models .................................................. AC 120 V, 60 Hz
A model ......................................................... AC 240 V, 50 Hz
B, G models .................................................. AC 230 V, 50 Hz
L, R, T models ............... AC 110-120 / 220-240 V, 50 / 60 Hz
K model ............................................... AC 110 / 220 V, 60 Hz
J model ................................................. AC 100 V, 50 / 60 Hz
Power Consumption / 消費電力
[YST-SW030]
U, C, A, B, G, L, R, T, K models .................................... 70 W
J model ........................................................................... 40 W
[YST-SW010]
U, C, A, B, G, L, R, T, K models .................................... 45 W
J model ........................................................................... 30 W
Dimensions / 外形寸法 (W x H x D)
[YST-SW030] ......................................... 290 x 361 x 311 mm
(11-7/16" x 14-3/16" x 12-1/4")
[YST-SW010] ......................................... 280 x 325 x 293 mm
(11-1/16" x 12-13/16" x 11-9/16")
Weight / 質量
[YST-SW030] ....................................... 10.0 kg (22 lbs. 1 oz.)
[YST-SW010] ....................................... 8.5 kg (18 lbs. 12 oz.)
Finish
Cherry Color ............................. A, B, G, L, R, T, K, J models
Black Color ........................... U, C, A, B, G, L, R, T, J models
Silver Color ...................... U, C, A, B, G, L, R, T, K, J models
Accessories / 付属品
Subwoofer Cable (5 m) x 1, Non-skid Pad x 4
* Specifications are subject to change without notice due to
product improvements.
※ 参考仕様および外観は予告なく変更されることがあります。
U .......... U.S.A. model C ...... Canadian model
A .......... Australian model B ...... British model
G .......... European model L ....... Singapore model
R .......... General model T ....... Chinese model
K .......... Korean model J ....... Japanese model
•DIMENSIONS / 寸法図
290 (11-7/16")
290.5 (11-7/16")
70.5
(2-13/16)
361 (14-3/16")
290 (11-7/16")
21
(13/16")
311 (12-1/4")
Unit : mm (inch)
単位:mm（インチ）
280 (11-1/16")
277.2 (10-15/16")
47.8
(1-7/8)
325 (12-13/16")
280(11-1/16")
13
(1/2")
293 (11-9/16")
Unit : mm (inch)
単位:mm（インチ）
[YST-SW030] [YST-SW010]

YST-SW030/YST-SW010
4
YST-SW030/
YST-SW010
■INTERNAL VIEW
YST-SW030
1MAIN (3) P.C.B.
2MAIN (1) P.C.B.
3MAIN (6) P.C.B.
4Power Transformer
5MAIN (7) P.C.B. (U, C, A, B, G, J models)
MAIN (10) P.C.B. (L, R, T, K models)
6MAIN (9) P.C.B. (L, R, T, K models only)
7MAIN (2) P.C.B.
8MAIN (4) P.C.B.
1 2
4
7 6
3
58 Rear Panel
YST-SW010
1MAIN (3) P.C.B.
2MAIN (1) P.C.B.
3MAIN (6) P.C.B.
4MAIN (7) P.C.B. (U, C, A, B, G, J models)
MAIN (10) P.C.B. (L, R, T, K models)
5Power Transformer
6MAIN (9) P.C.B. (L, R, T, K models only)
7MAIN (2) P.C.B.
8MAIN (4) P.C.B.
1 2
5
7 6
3
48 Rear Panel
Advanced YST
Advanced Yamaha Active Servo
Technology is a unique system to
let the speaker unit have a per-
fectly linear motion by the speaker
and amplifier combination.
アドバンスドヤマハアクティブサーボテ
クノロジー
アドバンスドヤマハアクティブサーボテ
クノロジーは、スピカーとアンプの組み
合わせにより振動板を効率よくスムーズ
に動かし最大音圧時のリニアリティを大
幅に改善したユニークなシステムです。
QD-Bass Technology
QD-Bass (Quatre Dispersion
Bass) technology is a Yamaha
unique technology to radiate the
sound efficiently in four horizontal
direction.
QDベーステクノロジー
QD（キューディー）ベーステクノロ
ジーは、低音エネルギーを4水平方向
に効率よく放射するヤマハ独自のテク
ノロジーです。

YST-SW030/YST-SW010
5
YST-SW030/
YST-SW010
YST-SW030 (B, G models) YST-SW030 (L model)
■REAR PANELS
YST-SW030 (A model)YST-SW030 (U, C models)

YST-SW030/YST-SW010
6
YST-SW030/
YST-SW010
YST-SW030 (J model)
YST-SW030 (T model)
YST-SW030 (K model)
YST-SW030 (R model)

YST-SW030/YST-SW010
7
YST-SW030/
YST-SW010
YST-SW010 (U, C models) YST-SW010 (A model)
YST-SW010 (B, G models) YST-SW010 (L model)

YST-SW030/YST-SW010
8
YST-SW030/
YST-SW010
YST-SW010 (T model)
YST-SW010 (K model) YST-SW010 (J model)
YST-SW010 (R model)

YST-SW030/YST-SW010
9
YST-SW030/
YST-SW010
■DISASSEMBLY PROCEDURES / 分解手順
※ 本項目では、代表としてYST-SW030について記述します。* The description below uses YST-SW030 as a representative
model.
Fig. 2
Fig. 1
2. リアパネルAss'yの外し方
a. ③のネジ8本を外します。（Fig.2）
※ 取り外す③のネジには矢印（ ）が印刷されています。
b. リアパネルAss'yを引き出します。（Fig.2）
2. Removal of Rear Panel Ass'y
a. Remove 8 screws (3). (Fig. 2)
* Screws (3) are identified with arrow marks ( ).
b. Pull out the rear panel ass'y. (Fig. 2)
Connector
コネクター
Driver
スピーカーユニット
Base
ベース
1
1
2
2
3
3
RearPanelAss'y
リアパネルAss'y
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
1. Removal of Driver
a. Remove 4 screws (1) and then remove the Base. (Fig. 1)
b. Remove 4 screws (2) and then remove the Driver. (Fig. 1)
c. Disconnect the connector connected to the terminal of the
Driver. (Fig. 1)
（番号順に部品を取り外してください。）
AC電源コンセントから、電源コードを抜いてください。
1. スピーカーユニットの外し方
a. ①のネジ4本を外し、ベースを取り外します。（Fig.1）
b. ②のネジ4本を外し、スピーカーユニットを取り外します。
（Fig.1）
c. スピーカーユニットの端子に接続されているコネクターを外し
ます。（Fig.1）

YST-SW030/YST-SW010
10
YST-SW030/
YST-SW010
■BLOCK DIAGRAM
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 it. (Fig. 3)
P.C.B.チェックをする場合には
・ 分解の際に外したコネクターをすべて元通りに接続しま
す。
・ 絶縁のためにゴムシートと布を敷き、その上にリアパネル
Ass'yを置いてチェックします。（Fig.3）
Fig. 3
Rubber Sheet and Cloth
ゴムシートと布
IC4A
IC5A IC5B
IC1
2
3
4
+
-
L.P.F.
6dB/oct
L.P.F.
12dB/oct
H.P.F.
12dB/oct
IC3
DRIVER
INPUT
VR1
VOLUME *( ) YST-SW010 Pin No.
POWER
AMP
RY1
PROTECTION
POWR
SUPPLY
D1
F1
T1
POWER
SW1
4
83 *(2)
26
2 *(1)
2
10 *(9)
9 *(8)
12 *(10)
+B
+B
-B
-B
IC2
Q16
D19,21
Q5,6,7,8
D4,5,22,23
R28
0.1
+15
-15
Q9,D2
REGULATER
Q10,D3
A.N.I.C
LIMITER