Yamaha YST-FSW100 User manual

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.
2005 All rights reserved.
YST-FSW100
■CONTENTS
TO SERVICE PERSONNEL .......................................... 2
SPECIFICATIONS / 参考仕様 ........................................ 3
INTERNAL VIEW ........................................................... 4
FRONT PANEL .............................................................. 4
REAR PANELS .......................................................... 5~6
DISASSEMBLY PROCEDURES/分解手順 ............. 7~9
BLOCK DIAGRAM....................................................... 10
PRINTED CIRCUIT BOARD ........................................ 11
SCHEMATIC DIAGRAM .............................................. 12
PARTS LIST ........................................................... 13~18
100957
P.O.Box 1, Hamamatsu, Japan
SERVICE MANUAL
SUBWOOFER SYSTEM
YST-FSW100
’05.06

YST-FSW100
2
YST-FSW100
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 ohms
shunted by 0.15µF.
“CAUTION”
“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A, 125V FUSE.”
CAUTION
F1: REPLACE WITH SAME TYPE 1.6A, 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 1.6A, 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.
About Lead Free Solder / 無鉛ハンダについて
Side A
Side B
SMT REFLOW Process
MI
FLOW Process
Solder Dip
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。
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.
The P.C.B.s installed in this unit are soldered using the
following solder.  
MAIN P.C.B. SIDE A /  -SIDE B /  Lead Free Solder / 

YST-FSW100
3
YST-FSW100
■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.)
........................................................................................ 75 W
Input Sensitivity / 入力感度 (50 Hz, 75W / 5 ohms)
INPUT (PJ) ................................................................... 70 mV
Dynamic Power / ダイナミックパワー (5 ohms)
...................................................................................... 130 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
.......................................................................30 Hz to 200 Hz
Driver / スピーカーユニット (Magnetic Shielding Type)
...................................................... 16 cm (6.5") Cone Woofer
Input Section / 入力部
INPUT ............................................................... RCA Pin Jack
Operation Section / 操作部
Top Panel ...... Power Switch, Volume Control, LED Indicator
Rear Panel............................. Voltage Selector (R, L models)
Power Supply / 電源
U, C models..................................................AC 120 V, 60 Hz
R, L models ...................AC 110-120 / 220-240 V, 50 / 60 Hz
T model.........................................................AC 220 V, 50 Hz
K model.........................................................AC 220 V, 60 Hz
A model.........................................................AC 240 V, 50 Hz
B, G models..................................................AC 230 V, 50 Hz
J model ................................................. AC 100 V, 50 / 60 Hz
Power Consumption / 消費電力
U, C, R, T, K, A, B, G, L models .................................... 70 W
J model ........................................................................... 45 W
Dimensions / 外形寸法 (W x H x D)
................................................................400 x 375 x 157 mm
(15-3/4" x 14-3/4" x 6-3/16")
• DIMENSIONS / 寸法図
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、スピー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。
Weight / 質量
..............................................................9.0 kg (19 lbs. 13 oz.)
Finish
Silver Color ...................... U, C, R, T, K, A, B, G, L, J models
Black Color ...................... U, C, R, T, K, A, B, G, L, J models
Cherry Color .................... U, C, R, T, K, A, B, G, L, J models
Accessories / 付属品
...................................................... Subwoofer Cable (5 m) x 1
System Control Cable (5 m) x 1 (U, C, J models)
* 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
R .......... General model T....... Chinese model
K .......... Korean model A ...... Australian model
B .......... British model G ...... European model
L .......... Singapore model J ....... Japanese model
Unit : mm (inch)


281 (11-1/16") 155
157 (6-3/16")
130 (5-1/8")
340 (13-3/8")
400 (15-3/4")
50 375 (14-3/4")
325 (12-13/16")
29.5
(1-3/16")
27
295.5 (11-5/8")
(1-15/16")
(1-1/16")
(6-1/8")

YST-FSW100
4
YST-FSW100
POWER INDICATOR
U, C, J models
•TOP PANELS
R,T, K, A, B, G, L models
POWER INDICATOR
■INTERNAL VIEW
■FRONT PANEL
1MAIN (3) P.C.B.
2DRIVER
3MAIN (1) P.C.B.
4MAIN (4) P.C.B.
5MAIN (11) P.C.B.
31 2
96748 5
6MAIN (9) P.C.B. (R, L models)
7MAIN (2) P.C.B.
8MAIN (7) P.C.B. (U, C, T, K, A, B, G, J models)
MAIN (10) P.C.B. (R, L models)
9POWER TRANSFORMER

YST-FSW100
5
YST-FSW100
■REAR PANELS
T model K model
R modelU, C models

YST-FSW100
6
YST-FSW100
L model J model
B, G modelsA model

YST-FSW100
7
YST-FSW100
2. Removal of Front Grille Ass’y
The Front Grille Ass’y is fixed to the cabinet with dowels at
4 locations. As a flatblade screwdriver is used for removal,
use special care not to cause damage to the cabinet.
a. Using the flatblade screwdriver inserted in the gap be-
tween the Front Grille Ass’y and the cabinet (bottom side
first), push up the Front Grille Ass’y. (Fig. 1)
b. Remove the Front Grille Ass’y by lifting it up.
* When installing the Front Grille Ass’y, apply quick-dry-
ing bond to the dowels and then fit them into dowel
holes for secure installation.
(When installing Front Grille Ass'y, its dowels will come
off easily if they are inserted into holes without applying
quick dry bond or the like.)
■DISASSEMBLY PROCEDURES / 分解手順
Fig. 1
2. フロントグリルASSYの外し方
フロントグリルASSYは4箇所のダボでキャビネットに固定さ
れています。取り外しの際、本体に傷が付かないよう十分注意
してください。
a. 底側からマイナスドライバー等を差し込み、フロントグリル
ASSYを押し上げます。（Fig.1）
b. 徐々に上面ヘマイナスドライバー等で押し上げて、フロント
グリルASSYを取り外します。
＊ 取り付け時には、フロントグリルASSYのダボに速乾ボン
ドなどを塗って差し込み、固定してください。
（フロントグリルASSYのダボへ速乾ボンドなどを塗らずに
差し込むだけでは、簡単に外れてしまいます。）
1. Removal of Base
a. Remove 4 screws (1). (Fig. 1)
b. Remove the Base. (Fig. 1)
1. ベースの外し方
a. ①のネジ4本を外します。（Fig.1）
b. ベースを取り外します。（Fig.1）
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet. （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。
3. Removal of Driver
a. Remove 4 screws (2) and then remove the Driver. (Fig. 2)
b. Disconnect the connector connected to the terminal of the
Driver. (Fig. 2)
3. スピーカーユニットの外し方
a. ②のネジ4本を外し、スピーカーユニットを引き出します。
（Fig.2）
b. 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.2）
Front Grille Ass'y

Base

Dowels

1
1
Flatblade Screwdriver


YST-FSW100
8
YST-FSW100
4. Removal of Rear Panel Ass’y
a. Remove 14 screws (3). (Fig. 3)
* Screws (3) are identified with arrow marks ( ).
b. Pull out the Rear Panel Ass’y. (Fig. 3)
c. Remove CB3 and CB12. (Fig. 3)
5. Removal of Top Panel Sub Ass’y
The Top Panel Sub Ass’y is fixed to the Top Panel Ass’y with
double sided adhesive tape. As a flatblade screwdriver is
used for removal, use special care not to cause damage to
the cabinet.
a. Using the flatblade screwdriver inserted in the gap be-
tween the Front Grille Ass’y and the cabinet (rear side
first), push up the Top Panel Sub Ass’y. (Fig. 4)
4. リアパネルASSYの外し方
a. ③のネジ14本を外します。（Fig.3）
＊ 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ASSYを引き出します。（Fig.3）
c. CB3、CB12を外します。（Fig.3）
5. トップパネルサブASSYの外し方
トップパネルサブASSYは両面粘着テープでトップパネル
ASSYに固定されています。取り外しの際、本体に傷が付かな
いよう十分注意してください。
a. 後側からマイナスドライバー等を差し込み、トップパネルサブ
ASSYを押し上げます。（Fig.4）
CB3
CB12



3
3
Fig. 3
Connector



2
Driver

Fig. 2

YST-FSW100
9
YST-FSW100










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 and Top Panel
Ass'y on them. (Fig. 5)
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
ASSYとトップパネルASSYを置いてチェックします。
（Fig.5）
Fig. 5
6. Removal of Top Panel Ass’y
a. Remove 4 screws (4). (Fig. 4)
b. Pull out the Top Panel Ass’y. (Fig. 4)
6. トップパネルASSYの外し方
a. ④のネジ4本を外します。(Fig.4)
b. トップパネルASSYを取り外します。（Fig.4）
Fig. 4












44
Flatblade Screwdriver

b. 徐々に上面ヘマイナスドライバー等で押し上げて、トップパネ
ルサブASSYを取り外します。
＊ 取り付け時には、トップパネルサブASSYの古い両面粘着
テープを剥がし、新しい両面粘着テープ（5mm幅）を貼り
固定してください。
（古い両面粘着テープを剥がさずに取り付けた場合、トップ
パネルサブASSYは簡単に外れてしまいます。また、両面
粘着テープを貼らないで取り付けた場合も同様に、トップ
パネルサブASSYは簡単に外れてしまいます。）
b. Remove the Top Panel Sub Ass’y by lifting it up.
* When reinstalling it, remove old double sided adhesive
tape from the Top Panel Sub Ass’y and attach new
double sided adhesive tape to it to secure installation.
(The Top Panel Sub Ass’y will come off easily if it is
installed without removing the old double sided adhe-
sive tape. Also, it will come off easily if it is installed
without attaching the double sided adhesive tape.)

YST-FSW100
10
YST-FSW100
■BLOCK DIAGRAM
IC4A IC5A IC5B
IC1
8
7
6-
+
+
-
L.P.F.
6dB/oct H.P.F. 12dB/oct L.P.F. 12dB/oct
DRIVER
INPUT
PJ1
VR1
VOLUME POWER
AMP RY1
PROTECTION
623
84
2
10
9
12
+B
-B
IC6
Q5,6
D4,5,22,23
Q17~20
D7,25
R28
0.1
POWR
SUPPLY
D1
F1 T1
POWER
SW1
+B
-B
+15
-15
Q9,D2
REGULATOR
Q10,D3
A.N.I.C
LIMITER
++
REGULATOR
Q3, 4 RY2
JK1
SYSTEM CONTROL
U, C, J models