Yamaha MSP-3 Service Manual

MSP3

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。

このサービスマニュアルは大豆油
インクで印刷しています。

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

011605

PA

20010915-18000

CONTENTS

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

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

BLOCK DIAGRAM

CIRCUIT BOARD LAYOUT ................. 6

WIRING ..................................................................... 6

（結線図）

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

IC BLOCK DIAGRAM ................................... 10

CIRCUIT BOARDS ........................................ 11

INSPECTION ............................................................... 13

OVERALL CIRCUIT DIAGRAM

（目次）

（

総合仕様

）

（パネルレイアウト）

（ブロックダイアグラム）

（ユニットレイアウト）

（分解手順）

（ICブロック図）

（シート基板図）

（検査）

（総回路図）

............................ 5

PARTS LIST

HAMAMATSU, JAPAN

1.386K-344 Printed in Japan 2001.10

1

MSP3

IMPOR TANT 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 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

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.

IMPOR TANT NOTICE FOR THE UNITED KINGDOM

Connecting the Plug and CoConnecting the Plug and Co

Connecting the Plug and Co

Connecting the Plug and CoConnecting the Plug and Co

IMPORTANT. The wires in this main lead are coloured in

As the colours of the wires in the main lead of this apparatus may not
correspond with the coloured markings identifying the terminals in
your plug, proceed as follows:

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

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

Be certain that neither core is connected to the earth terminal of the
three pin plug.

accordance with the following code:

BLUE: NEUTRAL
BROWN: LIVE

rr

dd

r

d

rr

dd

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

MSP3

)

)

（特性図）

SPECIFICATIONS

（総合仕様）

General specifications

Type....................................... 2-way Bass Reflex

Powered Speaker

Crossover Frequency............ 4 kHz

Frequency Range.................. 65 Hz–22 kHz

Maximum Output Level......... 98 dB (1 m on Axis)

Dimensions (W X H X D)....... 144 X 236 X 167 mm

Weight................................... 4.4 kg

Magnetic shielded................. EIAJ

Speaker unit

Speaker Unit

LF: 10 cm cone (4Ω, magnetic shielded)
HF: 2.2 cm dome (4Ω, magnetic shielded)

Enclosure

Type: Bass Reflex

●総合仕様

形式.........................................2ウェイバスレフ型パワー

ド・スピーカー

クロスオーバー周波数............ 4kHz

再生周波数帯域....................... 65Hz 〜22kHz

最大出力音圧レベル................ 98dB（軸上 1m）

最大外形寸法（W× H× D）..144× 236× 167mm

重量......................................... 4.4kg

防磁仕様.................................. EIAJ

●スピーカー部

スピーカーユニット

LF：10cmコーン（4 Ω、防磁型）、
HF：2.2cmドーム（4Ω、防磁型）

エンクロージャー

方式：バスレフ型

Amp.unit

S/N: 95dB (IEC-A weighting)

Maximum Output Power.......... 20W

Input Sensitivity/Impedance

LINE 1: –10 dB/10 kΩ (RCA phono, Unbalanced)
LINE 2: +4 dB/10 kΩ (XLR, phone Balanced)

Level control

LINE 1
LINE 2

Tone control

HIGH

LOW

Power Indicator........................ Green LED

Power Requirement

USA and Canada: ............. AC120V, 60 Hz

Europe: .............................. AC230V, 50 Hz

Others: ............................... AC240V, 50 Hz

Power Consumption................ 30W

Option...................................... BWS20-190 (Ceiling/

wall Bracket

●アンプ部

S/N：≧95dB（IEC-A 使用時）

定格最大出力........................... 20W

入力感度／インピーダンス

LINE1：−10dB/10k Ω（RCAピン、アンバランス）
LINE2：＋4dB/10k Ω（XLR、Phone共にバランス）

レベルコントロール

LINE1
LINE2

トーンコントロール

HIGH

LOW

パワーインジケーター............ 緑色 LED

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

消費電力.................................. 20W

オプション.............................. BWS20-190（天井吊り

用／壁掛け用ブラケット）

Performance graph

+10

0

–10

–20

RESPONSE (dB)

–30

–40

20

FREQUENCY (Hz

10k1k100

3

MSP3

yiu

PANEL LAYOUT

Front Panel

（フロントパネル）

（パネルレイアウト）

q LOW control
w HIGH control
e Power indicator
r LINE 1 level control
t LINE 2 level control

q LOW コントロール
w HIGH コントロール
e パワーインジケーター
r LINE1レベルコントロール
t LINE2レベルコントロール

LOW HIGH LINE

qw e rt

Rear Panel

（リアパネル）

POWER

ON

OFF

PARALLEL

INPUT

12

LINE 1
(–10dB)

LINE 2
(+4dB)

y POWER switch
u INPUT LINE 1 jack
i INPUT LINE 2 jacks

y POWERスイッチ
u INPUTLINE1端子
i INPUTLINE2端子

4

MSP3

BLOCK DIAGRAM

INPUT LINE 1

INPUT LINE 2

PARALLEL

INPUT LINE 1,2

Phone Jack

DIMENSIONS

IC1

42

IC1

6

7

（寸法図）

（ブロックダイアグラム）

LINE 1

TONE CONTROL

LINE 2

8

LOW

HIGH

IC2

P. AMP

38

SPEAKER

HF

LF

236

LOW HIGH LINE

12

144

2-M5

(6) (6)

60 44

155
167

Units: mm

（単位）

5

MSP3

CIRCUIT BOARD LAYOUT

LOW HIGH 1 2LINE

（ユニットレイアウト）

MAIN

POWER

C

PS
E

100V 20W 50/60Hz

YAMAHA CORPORATION

MADE IN CHINA
SER NO.

ON

OFF

MONITOR SPEAKER
MODEL MSP3

INPUT

PARALLEL

LINE1
(-10dB)

LINE2
(+4dB)

AMAIN

WIRING

（結線図）

Speaker

HF

BMAIN

BMAIN

Speaker

LF

CN2
(10P)

Power
transformer

(

電源トランス

CN4
(3P)

CN15 CN14

)

CN8(4P)

CN3(4P)

CN7

(3P)
CN17
CN16

MAIN

AMAIN

CN1
(6P)

D

MAIN

MAIN

C

D

6