Yamaha MX-D1 - Amplifier User manual
100869
P.O.Box 1, Hamamatsu, Japan
■CONTENTS
TO SERVICE PERSONNEL ...................................... 2~3
FRONT PANEL .............................................................. 4
REAR PANELS .......................................................... 4~5
SPECIFICATIONS .......................................................... 6
INTERNAL VIEW ........................................................... 7
SERVICE PRECAUTIONS / サービス時の注意事項 ..... 8~10
DISASSEMBLY PROCEDURES / 分解手順 ........... 11~14
TROUBLE SHOOTING / 故障チェック方法 ................ 15~16
PROTECTION INFORMATION /
プロテクション情報 .............................................................. 17~18
IC DATA ................................................................. 19~21
BLOCK DIAGRAM ................................................. 22~23
PRINTED CIRCUIT BOARD .................................. 24~33
PIN CONNECTION DIAGRAM .................................... 34
SCHEMATIC DIAGRAM ........................................ 35~37
PARTS LIST ........................................................... 39~54
SERVICE MANUAL
DIGITAL POWER AMPLIFIER
MX-D1
MX-D1
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.
2
MX-D1
MX-D1
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 sand
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.
●Leakage current must not exceed 0.5mA.
●Be sure to test for leakage with the AC plug in both polarities.
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.
“CAUTION”
“F501: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 20A,
250V FUSE.”
CAUTION
F501: REPLACE WITH SAME TYPE 20A, 250V FUSE.
ATTENTION
F501: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 20A, 250V.
3
MX-D1
MX-D1
この製品に使用されているすべての基板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。
ただし、MAINP.C.B.部品面およびOPERATIONP.C.B.部品面
の表面実装部品のハンダ付けには、鉛入り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 all P.C.B.s used for this product are soldered
with lead-free soldering material which is an alloy of
Sn+Ag+Cu (tin + silver + copper).
However, the surface mount devices on the component side
of the MAIN P.C.B. and OPERATION P.C.B. are soldered
with the lead solder.
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
75 (2-15/16")
60
(2-3/8")
401 (15-13/16")
15
(9/16")
2
(1/16")
34
(1-5/16")
437 (17-3/16")
435 (17-1/8")
Unit : mm (inch)
単位:mm（インチ）
DIMENSIONS / 寸法図
4
MX-D1
MX-D1
Cover
■REAR PANELS
U, C models
A model
■FRONT PANEL
5
MX-D1
MX-D1
B, G models
T model
K model
J model
6
MX-D1
MX-D1
Minimum RMS Output Power / 定格出力
(1 kHz, 1% THD)
U, C models (8 ohms) ......................... 500 W + 500 W
A, B, G, T, K, J models (4 ohms to 8 ohms) ...
500 W + 500 W
Dynamic Power Per Channel/ダイナミックパワー (IHF)
8/6/4/2 ohms .............................700/850/1000/1000 W
Dynamic Headroom/ダイナミックヘッドルーム
8/6/4 ohms.............................................. 1.5/2.3/3.0 dB
Damping Factor/ダンピングファクタ
1 kHz, 8 ohms ....................................... more than 200
Input Sensitivity / Input Impedance(入力感度/入力イン
ピーダンス)
UNBALANCE ................................... 1.3 V / 25 k-ohms
BALANCE ......................................... 2.2 V / 10 k-ohms
Frequency Response/周波数特性
1 Hz to 100 kHz............................................... ±3.0 dB
10 Hz to 20 kHz ............................................... ±0.5 dB
Total Harmonic Distortion/全高調波歪率
(1 kHz, 10 W/ 8 ohms, 20 kHz LPF)
UNBALANCE .................................. less than 0.002 %
BALANCE ........................................ less than 0.002 %
Signal to Noise Ratio/信号対雑音比 (IHF-A network)
(Input shorted, 20 kHz LPF)
UNBALANCE .................................. more than 120 dB
BALANCE ........................................ more than 120 dB
Channel Separation/チャンネルセパレーション
(Input 5.1 k-ohms shorted, 1 kHz)
UNBALANCE .................................. more than 100 dB
BALANCE ........................................ more than 100 dB
Muting/ミューティング
.................................................................................. - ∞
■SPECIFICATIONS/参考仕様
Power Supply/電源電圧
U, C models ...................................... AC 120 V, 60 Hz
A model ............................................. AC 240 V, 50 Hz
B, G models ...................................... AC 230 V, 50 Hz
T model ............................................. AC 220 V, 50 Hz
K model ............................................. AC 220 V, 60 Hz
J model .......................................... AC 100V, 50/60 Hz
Power Consumption/消費電力
U, C models ....................................................... 350 W
A, B, G, T, K models .......................................... 350 W
J model ............................................................... 350 W
Standby Power Consumption (Reference Data)/待機時
消費電力(参考値)
............................................................. less than 0.1 W
Dimensions/寸法 (W x H x D)
..... 435 x 75 x 437 mm (17-1/8" x 2-15/16" x 17-3/16")
Weight/重量
................................................. 10.4 kg (22 lbs. 15 oz.)
Accessories/付属品
Power Cable x 1
Clamp Filter with Fixing Tie (for Power Cable) x 2
Clamp Filter (for RS-232C Interface Cable) x 1
Clamp Filter (for Control Cable) x 2 [U, C models]
Clamp Filter (for Audio Pin Cable) x 1 [U, C 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
A ........ Australian model B ..... British model
G ........ European model T ..... Chinese model
K ........ Korean model J ..... Japanese model
7
MX-D1
MX-D1
■INTERNAL VIEW
123456 7
A0 9 8
1FUNCTION (1) P.C.B.
2FUNCTION (4) P.C.B.
3FUNCTION (3) P.C.B.
4FUNCTION (6) P.C.B.
5FUNCTION (2) P.C.B.
6FUNCTION (7) P.C.B.
7FUNCTION (5) P.C.B.
8MAIN (R) P.C.B.
9OPERATION (1) P.C.B.
0OPERATION (2) P.C.B.
AMAIN (L) P.C.B.
8
MX-D1
MX-D1
■SERVICE PRECAUTIONS/サービス時の注意事項
1. 安全対策
・ この製品の内部には高電圧部分があり危険です。修理の際は、
絶縁性の手袋を使用するなどの安全対策を行ってください。
・ C196、C197、C198、C199、C222、C223には電源
をOFFにした後も電荷が残り、高電圧が維持されており危険で
す。
修理作業前に放電用抵抗（5kΩ/10W）を下記の端子間に接続
して放電してください。放電所用時間は約30秒間です。
（Lch、Rchに各4箇所あります。）
1. Safety measures
•Some internal parts in this product contain high voltages
and are dangerous. Be sure to take safety measures
during servicing, such as wearing insulating gloves.
•Note that C196, C197, C198, C199, C222 and C223
are dangerous even after the power is turned off because
an electric charge remains and a high voltage continues
to exist there.
Before starting the service work, connect discharging
resistors (5 k-ohms/10 W) to the terminals indicated in
the figure below to discharge electricity. The time
required for discharging is about 30 seconds. (at 4
locations for Lch and Rch, each)
C217
R272
TP304
TP302
TP301
TP303
IC129
C223
C222
C199
C197
C198C196
C191
D134
D135
D137
D139
D138
D136
C190
T101
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
MAIN P.C.B.
9
MX-D1
MX-D1
2. Precautions for connection of measuring
instrument
The structure of this product is twin-monaural type. Connect
the measuring instrument to the Lch side GND when taking
measurements on the Lch side and to the Rch side GND
when taking measurements on the Rch side.
Note: The GND is commonly used for Lch and Rch at the
screw terminal of the FUNCTION P.C.B. (3).
2. 計測器接続時の注意
この製品はツインモノラル構成になっています。計測器を接続す
る際、Lch側を測定する場合はLch側のGNDに接続し、Rch側を
測定する場合はRch側のGNDに接続してください。
注： LchのGNDとRchのGNDは、FUNCTIONP.C.B.(3)のネ
ジ端子部で共通になっています。
5 k-ohms
5 k-ohms
10W
10W
5 k-ohms
5 k-ohms
10W
10W
5 k-ohms
5 k-ohms
10W
10W
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
10
MX-D1
MX-D1
Q117
Q118
Q119
FET Mounting Screw
FET取り付けネジ
Heatsink/AMP
ヒートシンク/AMP
Q120
Heatsink/AMP Mounting Screw
ヒートシンク/AMP取り付けネジ
Heatsink/AMP
ヒートシンク/AMP
Frame
フレーム
3. FETの絶縁確認
MAINP.C.B.のFET（Q117〜Q120）を取り外した場合、組立後
に必ずテスターを使用してFET本体金属部分とFET取り付けネジ
との間が絶縁されていることを確認してください。
4. ヒートシンク/AMPとシャーシ間の絶縁確認
ヒートシンク/AMPをフレームに取り付けているネジを外した場
合、組立後に必ずテスターを使用してヒートシンク/AMPとフ
レームとの間が絶縁されていることを確認してください。
3. Confirming insulation of FET
When the FETs (Q117 to Q120) of the MAIN P.C.B. were
removed, be sure to check using the tester that the metal
part of each FET itself is insulated from the FET mounting
screw after reinstalling them.
4. Confirming insulation between Heatsink/AMP
and chassis
When the Heatsink/AMP mounting screws were removed,
be sure to check using the tester that the Heatsink/AMP is
insulated from the Frame after reinstalling them.
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