Yamaha SMS-100 Service Manual

POWERED SPEAKER

MSR100/SMS100

SERVICE MANUAL

このサービスマニュアルはエコパルプ
（ECF：無塩素系漂白パルプ）を使用しています。

This document is printed on chlorine free (ECF) paper.

MSR100

CONTENTS

SPECIFICATIONS ................................................. 3

PERFORMANCE GRAPH .......................................... 4

PANEL LAYOUT ...................................... 4

CIRCUIT BOARD LAYOUT ................. 5

DIMENSIONS ............................................................ 5

LEVEL DIAGRAM ................................ 6

DISASSEMBLY PROCEDURE .............................. 7

IC BLOCK DIAGRAM ................................... 12

CIRCUIT BOARDS ......................................... 12

INSPECTIONS ............................................................ 17

BLOCK DIAGRAM
CIRCUIT DIAGRAM
PARTS LIST

（目次）

（総合仕様）

（特性図）

（パネルレイアウト）

（ユニットレイアウト）

（寸法図）

（レベルダイアグラム）

（分解手順）

（ICブロック図）

（シート基板図）

（検査）

（ブロックダイアグラム）

（回路図）

011662

PA

20021201-56000

0.166K-7304 Printed in Japan ’02.11

HAMAMATSU, JAPAN

MSR100/SMS100

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 per-

IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-

The data provided is belived 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 changes in specification 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

IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power

IMPOR TANT NOTICE

sonal injury, destruction of expensive components and failure of the product to perform as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.

cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.

accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to
this bus.)

to the unit.

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 REASON WHAT
SO EVER!

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.

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN
ACCORDANCE WITH THE FOLLOWING CODE:

GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus may

not correspond with the coloured markings identifying the terminals in
your plug, proceed as follows:

The wire which is coloured GREEN and YELLOW must be
connected to the terminal in the plug which is marked by the letter E
or by the safety earth symbol or coloured GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal
which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the
terminal which is marked with the letter L or coloured RED.

* This applies only to products distributed by YAMAHA KEMBLE

MUSIC (U.K.) LTD.

WARNING

Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.

印の商品は、安全を維持するために重要な部品です。交換する場合は、安全のために必ず指定の部品をご使用下さい。

2

MSR100/SMS100



、

、


SPECIFICATIONS

General specifications

Type

2way Bass Reflex Powered Speaker

Speaker Unit

LF: 200 mm Cone

HF: 25.4 mm Compression Driver

Frequency Range..................55 Hz—20 kHz (–10 dB)

Cross Over Frequency..........4 kHz

Maximum Output Level.........112 dB (1 m)

Dimension (W×H×D).............275 × 455.5 × 255 mm

Weight..................................11 kg

Color.....................................Black (Approximate Munsell

Value 5 PB2/1)

Accessories..........................Power supply cord 2.5 m (AC

Inlet type)

Option..................................BWS50-190/260/320,

BCS251, BBS251

Amp. Unit

Max Power...........................100W at 1 kHz, THD=1%,

RL=6 Ω

Input Sensitivity....................INPUT 1: –50 dB* (MIC),

+4 dB* (LINE)

INPUT 2, 3: –10 dB*

Input Impedance..................INPUT 1, 2, 3: 10 k Ω

Output Sensitivity.................LINK OUT: –10 dB*

Output Impedance...............LINK OUT: 10 k Ω

Controls

LEVEL Control...............INPUT 1, 2, 3, MASTER

EQ Control......................LOW: ±3 dB at 60 Hz

HIGH: ±6 dB at 10 kHz

POWER Switch..............ON/OFF

Connectors

INPUT 1..........................XLR-3-31 (balanced)

INPUT 2, 3......................Phone (unbalanced)

LINK OUT.......................Phone (unbalanced)

Indicator

POWER Indicator............Green LED

CLIP Indicator.................Red LED

Power Requirement

USA and Canada...........AC 120 V, 60 Hz

Europe............................AC 230 V, 50 Hz

Australia.........................AC 240 V, 50 Hz

Korea

.................................A

Power Consumption.............70 W

C 220 V, 60 Hz

総合仕様

●総合仕様

形式

２ウェイバスレフ型パワードスピーカー

スピーカーユニット

LF:200mmコーン

HF:25.4mmコンプレッションドライバー

再生周波数帯域....................55Hz〜20kHz(-10dB)

クロスオーバー周波数.........4kHz

最大出力音圧レベル............112dB（軸上1m）

最大外形寸法

質量......................................11kg

色.........................................黒（近似マンセル値 

付属品..................................電源コード（AC インレッ

オプション...........................BWS50-190/260/320、

（W×H×D）

●アンプ部

定格最大出力.......................100W at 1kHz、THD=1%

入力感度..............................INPUT1: -50dB*（MIC）

入力インピーダンス.............INPUT1、2、3:10kΩ

出力感度...............................LINKOUT:-10dB*

出力インピーダンス.............LINKOUT:10kΩ

コントロール

LEVELコントロール.........INPUT1、2、3、MASTER

EQコントロール...............LOW:±3dBat60Hz

POWERスイッチ..............ON/OFF

コネクター

INPUT1.............................XLR-3-31（バランス型）

INPUT2、3.......................フォーン（アンバランス型）

LINKOUT.........................フォーン（アンバランス型）

インジケーター

POWERインジケーター...緑色発光LED

CLIPインジケーター.........赤色発光LED

電源.......................................AC100V、50/60Hz

消費電力................................65W

*0dB=0.775V

.....275 ×455.5 ×255mm

5PB2/1）
ト型、2.5m）
BCS251、BBS251

RL=6Ω

+4dB*（LINE）

INPUT 2、3: -10dB* 

HIGH:±6dBat10kHz

* 0 dB=0.775 V

For European Model
Purchaser/User Information specified in EN55103-1 and
EN55103-2.
Inrush Current: 10A
Conformed Environment: E1, E2, E3 and E4

3

MSR100/SMS100

PERFORMANCE GRAPH

+10

0

-10

-20

RESPONSE (dB)

-30

-40
20

PANEL LAYOUT

（パネルレイアウト）

（特性図）

10k1k100

FREQUENCY (Hz)

Rear Panel

（リアパネル）

1

[POWER] Switch

2

[INPUT1] Connector

3

Sensitivity Switch

4

[INPUT2] and [INPUT3] Connectors

5

[LEVEL] Controls

6

[EQ] Controls

7

[LINK OUT] Connector

8

[MASTER LEVEL] Control

9

[CLIP] Indicator

10

[POWER] Indicator

11

[AC IN] Connector

（電源スイッチ）
（入力1端子）
（感度切り換えスイッチ）
（入力2端子、入力3端子）
（音量コントロール）
（音質コントロール）
（出力端子）
（全体音量コントロール）
（クリップインジケーター）
（電源インジケーター）
（電源入力端子）

4

MSR100/SMS100

CIRCUIT BOARD LAYOUT

〈

Right side view

NETWORK

（ユニットレイアウト）

〉 〈

IN

POWER AMPLIFIER

IN

EQ

Power amplifier assembly

（パワーアンプAss'y）

AC

EQ

POWER SWITCH

POWER SWITCH

AC

Power transformer

（電源トランス）

1

010

LEVEL

2

0

LEVEL

3

0

LEVEL

EQ

HIGH

LOW

MASTERMASTER

0

LEVEL

POWER

ON/OFF

Rear view

INPUT

2

NEUTRIK

3

1

MIC(-50dB)
LINE(+4dB)

LINE
(-10dB)

10

LINE
(-10dB)

10

LINK OUT

(-10dB)

+6-6

+3-3

CLIP

10

POWER

POWERED SPEAKER

AC IN

MODEL MSR100

PS
E

100V 65W 50/60HzÅ`

MADE IN CHINA
SER.NO.

******

〉

NETWORK

Power amplifier assembly

（パワーアンプAss'y）

POWER AMPLIFIER

Power transformer

（電源トランス）

DIMENSIONS

（寸法図）

137

455.5

275 255

120

2-M8x25

Units: mm
(単位 )

5

6

OUTPUT

(ｰ10dBu)

INPUT1

INPUT2, 3

(LINE)

0dBu

+4dBu

-10dBu

-50dBu

-4.7dBu

-2.2dBu

+29.9dBu (SP OUT)

INPUT1

(MIC)

INPUT3

(ｰ10dBu)

INPUT2

(ｰ10dBu)

INPUT1

(ｰ50dBu/+4dBu)

MIC

LINE

LF

HF

6Ω 100W

NW

MASTER

LEVEL

EQ

HIGHLOW

LOW
CUT

LOW

BOOST

P.AMP

MSR100/SMS100

LEVEL DIAGRAM

（レベルダイアグラム）

MSR100/SMS100

DISASSEMBLY PROCEDURE

1. Front Grille Assembly

(Time required: About 1 minute)

1-1 Remove the f our (4) screws marked [100A]. The front

grille assembly can then be removed. (Fig.1)

2. Speaker LF (Woofer)

(Time required: About 2 minutes)

2-1 Remove the front grille assembly. (See procedure 1.)
2-2 Remove the four (4) screws marked [80]. The

speaker LF (Woofer) can then be removed. (Fig.1)

2-3 Remove the wire LF (red/black) installed to the

speaker LF (Woofer). (Photo.1)

3. Front Cabinet Unit and Rear Cabinet Unit

(Time required: About 3 minutes)

3-1 Remove the front grille assembly. (See procedure 1.)
3-2 Remove the speaker LF (Woof er). (See procedure 2.)
3-3 Remove the five (5) screws marked [50A] and the f our

(4) screws marked [50B]. The front cabinet unit and
the rear cabinet unit can then be divided. (Fig.1, 2)

Take care not to damage the speaker HF
(Tweeter) terminal when opening the front
cabinet unit and the rear cabinet unit.

（分解手順）

1. フロントグリルAss'y(所要時間：約 1 分)

1-1 [100A]のネジ4 本を外して、フロントグリル Ass'y

を外します。(図1)

2. スピーカLF(ウーファー)(所要時間：約 2 分)

2-1 フロントグリル Ass'y を外します。(1 項参照)
2-2 [80]のネジ4本を外して、スピーカLF(ウーファー)

を外します。(図1)

2-3 スピーカLF( ウーファー)に取り付けられている束

線 LF(赤／黒)を外します。(写真 1)

3. フロントキャビネット部、
リアキャビネット部

3-1 フロントグリル Ass'y を外します。(1 項参照)
3-2 スピーカ LF(ウーファー)を外します。(2 項参照)
3-3 [50A]のネジ5本と[50B]のネジ4 本を外して、フロ

ントキャビネット部とリアキャビネット部を別けま
す。(図 1,2)

※ フロントキャビネット部とリアキャビネット部を開

きすぎて、スピーカHF（ツィーター）端子を傷めな
いように注意して下さい。

(所要時間：約 3 分)

〈

Front view

Front cabinet unit

(フロントキャビネット部)

[100A]

[50A]

[80]

Front grille assembly

(フロントグリルAss'y)

[50A]

[80]

[100A]

[50A]: Bind Head Tapping Screw-A

5.0X35 BL (AAX42210)

[80]: Bind Head Tapping Screw-B

4.0X18 BL (AAX42230)

[100A]: Bind Head Tapping Screw-B

4.0X10 BL (AAX12100)

〈

Rear view

〉

〉

Rear cabinet unit

[50A]

Fig.1

(＋バインドAタイト)

(＋バインドBタイト)

(＋バインドBタイト)

(図1)

(リアキャビネット部)

[100A]
[50A]

[80]

Speaker LF (Woofer)

(スピーカLF(ウーファー))

[50A]
[80]

[100A]

[50B]

INPUT

1

2

NEUTRIK

3

1

010

LEVEL

MIC(-50dB)
LINE(+4dB)

2

LINE
(-10dB)

10

0

LEVEL

3

LINE
(-10dB)

10

0

LEVEL

EQ

LINK OUT

HIGH

(-10dB)

+6-6

LOW

+3-3

MASTERMASTER

CLIP

10

0

LEVEL

POWER

POWER

ON/OFF

POWERED SPEAKER

AC IN

MODEL MSR100

PS
E

100V 65W 50/60HzÅ`

MADE IN CHINA
SER.NO.

******

[50B]

[50B]: Bind Head Tapping Screw-A

5.0X35 BL (AAX42210)

(図2)

Fig.2

[50B]

[50B]

(＋バインドAタイト)

Speaker LF (Woofer)

(スピーカLF(ウーファー))

Photo.1 (写真1)

Wire LF (Black)

(束線LF(黒))

Wire LF (Red)

(束線LF(赤))

7

MSR100/SMS100

))

4. Speaker HF (Tweeter)

(Time required: About 3 minutes)

4-1 Remove the front grille assembly. (See procedure 1.)
4-2 Divide the front cabinet unit and the rear cabinet

unit. (See procedure 3.)

4-3 Remove the wire HF (yellow/blue) installed to the

speaker HF (Tweeter). (Photo.2)

4-4 Remove the two (2) screws mark ed [46]. The speak er

HF (Tweeter) can then be removed from the front
cabinet unit. (Fig.3)

Front Cabinet Unit

(フロントキャビネット部)

[46]

Speaker HF (Tweeter)

(スピーカHF(ツィーター

4. スピーカHF(ツィーター)(所要時間：約 3 分)

4-1 フロントグリル Ass'y を外します。(1 項参照)
4-2 フロントキャビネット部とリアキャビネット部を別

けます。(3項参照)

4-3 スピーカ HF(ツィーター)に取り付けられている束

線 HF(黄／青)を外します。(写真 2)

4-4 [46]のネジ2本を外して、フロントキャビネット部か

らスピーカHF(ツィーター)を外します。(図 3)

Speaker HF (Tweeter)

(スピーカHF(ツィーター))

Photo.2

Wire HF (Yellow)

(束線HF(黄))

(写真2)

Wire HF (Blue)

(束線HF(青))

[46]: Bind Head Tapping Screw-B 4.0X20 BL (AAX42200)

(＋バインドBタイト)

Fig.3

(図3)

5. Network Assembly and NETW ORK Circuit Board

5-1 Remove the front grille assembly. (See procedure 1.)
5-2 Divide the front cabinet unit and the rear cabinet

unit. (See procedure 3.)

5-3 Remove the four (4) screws marked [10e]. The

network assembly can then be removed from the
rear cabinet unit. (Fig.4)

5-4 Remove the four (4) screws marked [N40]. The

network holders C and D can then be removed from
the NETWORK circuit board. (Fig.4)

Remove the P1, P2 connector assembly soldered
to the NETWORK circuit board.

Rear Cabinet Unit

(リアキャビネット部)

Network holder D

（ネットワーク固定金具D)

(Time required: About 4 minutes)

5. ネットワークAss'y、ネットワークシート

(所要時間：約4 分)

5-1 フロントグリル Ass'y を外します。(1 項参照)
5-2 フロントキャビネット部とリアキャビネット部を別

けます。(3項参照)

5-3 [10e]のネジ4本を外して、リアキャビネット部から

ネットワーク Ass'y を外します。(図 4)

5-4 [N40]のネジ4 本を外して、ネットワークシートか

らネットワーク固定金具 C、D を外します。(図4)

※ネットワークシートに取り付けられている線材 P1、

P2の半田を外せば、シートが外せます。

8

[10e]

NETWORK

Network holder C

（ネットワーク固定金具C)

[N40]

Network assembly

（ネットワークAss'y)

[10e]: Bind Head Tapping Screw-B 3.0X10 BL (AAX10840)
[N40]: Cup Screw-B PW3.0X8 Y (AAX43390)

(図4)

Fig.4

(＋カップネジBタイト)

(＋バイントBタイト)

MSR100/SMS100

6. Amplifier Assembly

(Time required: About 1 minute)

6-1 Remove the ten (10) screws mar ked [30]. The

amplifier assembly can then be removed. (Fig.5)

7. EQ Circuit Board, IN PCB Assembly and

IN Circuit Board

(Time required: About 3 minutes each)

7-1 Remov e the amplifier assemb ly. (See procedure 6.)
7-2 Remove the eight (8) screws marked [210]. The

shield case assembly can then be removed. (Fig.5,

Photo.3)
7-3 EQ Circuit Board:
7-3-1 Remove the six (6) knobs marked [110] and the six

(6) hexagonal nuts marked [A]. The EQ circuit board

can then be removed. (Fig.5, Photo.3)
7-4 IN PCB Assembly and IN Circuit Board:
7-4-1 Remove the three (3) hexagonal nuts marked [130]

and the three (3) screws marked [160]. The IN PCB

assembly can then be removed. (Fig.5, Photo.3)
7-4-2 Remove the screw marked [150c]. The angle L can

then be removed from the IN circuit board. (Fig.6)

〈

Rear view

〉

[210] x 8

Shield case assembly

(シールドケースAss'y)

6. アンプAss'y(所要時間：約 1 分)

6-1 [30]のネジ10本を外して、アンプAss'yを外します。

(図5)

7. EQシート、IN シート Ass'y、IN シート

(所要時間：各約 3 分)

7-1 アンプ Ass'y を外します。(6 項参照)
7-2 [210]のネジ8本を外して、シールドケースAss'yを

外します。(図 5,写真 3)
7-3 EQシート:
7-3-1 [110]のノブ 6 個と[A]の六角ナット 6 個を外して、

EQ シートを外します。(図 5,写真 3)
7-4 IN シート Ass'y、IN シート:
7-4-1 [130]の特殊六角ナット 3 個と[160]のネジ 3 本を外

して、IN シート Ass'y を外します。(図 5,写真 3)
7-4-2 [150c]のネジ1本を外して、INシートからL金具を

外します。(図 6)

Amplifier assembly

(アンプAss'y)

[30]

[30]

[A] x 6
[110] x 6
[160] x 2

[130] x 3

EQ

IN

[100B] x 2

Push knob

(プッシュボタン)

[30]

[160]

[30]

INPUT

1

010

LEVEL

2

10

0

LEVEL

3

10

0

LEVEL

EQ

HIGH

+6-6

LOW

+3-3

MASTERMASTER

10

0

LEVEL

POWER

ON/OFF

AC IN

2

NEUTRIK

3

1

MIC(-50dB)
LINE(+4dB)

LINE
(-10dB)

LINE
(-10dB)

LINK OUT

(-10dB)

CLIP

POWER

POWERED SPEAKER
MODEL MSR100

PS
E

100V 65W 50/60HzÅ`

MADE IN CHINA
SER.NO.

******

[30]

[180] x 8

Power amplifier assembly

(パワーアンプAss'y)

[30]

POWER AMPLIFIER

[20]

[30]

Power transformer

(電源トランス)

[30]

POWER SWITCH

[30]

[30]

AC

[20]: Bonding Tapping Screw-B 4.0X8 BL BO (AAX43620)
[30]: Bind Head Tapping Screw-B 4.0X14 BL (AAX42170)
[100B]: Bonding Tapping Screw-B 3.0X10 BL BO (AAX12110)
[130]: Hexagonal Nut M12.0 BL

(特殊六角ナット)

[160]: Bonding Tapping Screw-B 3.0X10 BL BO (AAX12110)
[180]: Pan Head Tapping Screw-B 3.0X12 BL (AAX43370)
[210]: Bonding Tapping Screw-B 3.0X10 BL BO (AAX12110)
[A]: Hexagonal Nut

Washer

(＋ボンディングBタイト)
(六角ナット)

(ワッシャー)

(＋ボンディングBタイト)
(＋バイントBタイト)
(＋ボンディングBタイト)

(＋ボンディングBタイト)
(＋ナベタッピングネジB)

Fig.5

[20]

(図5)

9

MSR100/SMS100

）

Amplifier Assembly (アンプAss'y)

〈

Front view

Power amplifier assembly

(パワーアンプAss'y)

POWER AMPLIFIER

〉

Shield case assembly

(シールドケースAss'y)

IN PCB assembly

(INシートAss'y)

IN

EQ

POWER SWITCH

Power transformer

(電源トランス)

Power transformer assembly

(電源トランスAss'y)

Photo.3

(写真3)

Power switch assembly

(電源スイッチAss'y)

AC

8. Power Amplifier Assemb ly and POWER AMPLIFIER Circuit Board

(Time required: About 4 minutes)

8-1 Remov e the amplifier assemb ly. (See procedure 6.)
8-2 Remove the shield case assembly. (See procedure

7-2.)

8-3 Remove the eight (8) screws marked [180]. The

power amplifier assembly can then be removed.
(Fig.5, Photo.3)

8-4 Remove the scre w marked [P40], the five (5) scre ws

marked [P80] and the four (4) screws marked [P90].
The POWER AMPLIFIER circuit board can then be
removed. (Fig.7)

IN PCB Assembly

(INシートAss'y)

IN

[150c]

Angle L

（L金具

[150c]: Cup Screw-B

PW3.0X8 Y (AAX43390)

(＋カップネジBタイト)

(図6)

Fig.6

8. パワーアンプAss'y、パワーアンプシート

(所要時間：約4 分)

8-1 アンプ Ass'y を外します。(6 項参照)
8-2 シールドケース Ass'y を外します。(7-2項参照)
8-3 [180]のネジ8本を外して、パワーアンプAss'y を外

します。(図 5,写真 3)

8-4 [P40]のネジ1 本と[P80]のネジ 5 本、[P90]のネジ 4

本を外して、パワーアンプシートを外します。(図7)

POWER AMPLIFIER

10

Power Amplifier Assembly

(パワーアンプAss'y)

[P80]

[P90]

[P80]

[P40]

[P80]

[P40]: Bind Head Tapping Screw-B 3.0X10 BL (AAX10840)
[P80]: Cup Screw-B PW3.0X8 Y (AAX43390)
[P90]: Cums Head Screw SP3.0X14 BL (AAX43410)

Fig.7

(図7)

(＋カップネジBタイト)
(＋カムス小ネジ)

(＋バインドBタイト)