Yamaha-AS-500-Service-Manual.pdf

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INTEGRATED AMPLIFIER
A-S500/A-S300
SERVICE 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.
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
IMPORTANT:
The presentation or sale of this manual to any individual or
fi
rm does not constitute authorization, certification or
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
IMPEDANCE SELECTOR ...............................................3
FRONT PANELS .............................................................3
REAR PANELS ...........................................................4–8
REMOTE CONTROL PANEL ..........................................9
SPECIFICATIONS /
参考仕様
................................... 9–10
INTERNAL VIEW .......................................................... 11
SERVICE PRECAUTIONS /
サービス時の注意事項
..... 11
DISASSEMBLY PROCEDURES /
分解手順
........... 12–15
UPDATING FIRMWARE /
ファームウェアの書き込み
..................................... 16–20
SELF-DIAGNOSTIC FUNCTION /
ダイアグ（自己診断機�½）
.......................................21–27
AMP ADJUSTMENT /
アンプ部調整
.......................28–29
IC DATA ...................................................................30–32
PIN CONNECTION DIAGRAMS .............................33–34
BLOCK DIAGRAM ........................................................35
PRINTED CIRCUIT BOARDS .................................36–52
SCHEMATIC DIAGRAMS .......................................53–61
REPLACEMENT PARTS LIST ................................63–79
REMOTE CONTROL .....................................................80
A-S500/A-S300
1011 8 8
Copyright © 2010
All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
P.O.Box 1, Hamamatsu, Japan
'10.09
A-S500/A-S300
■
TO SERVICE PERSONNEL
1. Critical Components Information
Components having special characteristics are marked
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 0.15 μF.
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
• Leakage current must not exceed 0.5mA.
• Be sure to test for leakage with the AC plug in both polari-
ties.
For U model
“CAUTION”
“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A (A-S500)
/ 6A (A-S300), 125V FUSE.”
For C model
CAUTION
F1: REPLACE WITH SAME TYPE 8A (A-S500) / 6A (A-S300), 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MÉME TYPE DE 8A (A-S500) / 6A (A-S300), 125V.
WARNING: CHEMICAL CONTENT NOTICE!
This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive
harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON
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.
About lead free solder /
無鉛ハンダについて
All of the P.C.B.s installed in this unit and solder joints are
soldered using the lead free 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)
本機に搭載されているすべての基板およびハンダ付けに
よる接合部は無鉛ハンダでハンダ付けされています。
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�½�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）
A-S500/A-S300
Caution:
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.
注意：
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�½�用ください。
2
A-S500/A-S300
■
IMPEDANCE SELECTOR
WARNING:
Do not change the setting of the IMPEDANCE SELECTOR switch
when the
unit
power is switched on, as doing so may damage
the
unit.
IMPEDANCE SELECTOR
■
FRONT PANELS
A-S500
A-S500 (U, C, R, T, A, B, G, L models)
A-S300
A-S300 (R, T, A, B, G, L, J models)
A-S500/A-S300
3
A-S500/A-S300
■
REAR PANELS
A-S500
A-S500 (U, C models)
A-S500 (R model)
A-S500/A-S300
A-S500 (T model)
4
A-S500/A-S300
A-S500
A-S500 (A model)
A-S500 (B model)
A-S500 (G model)
A-S500/A-S300
5

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