Yamaha A-S300, Service Manual

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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 speci
fi cally 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 speci
fi ed. 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 fi rm does not constitute authorization, certi fi cation 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
speci
fi cations are subject to change without notice or obligation to retro fi t. 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.
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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（自己診断機能）
.......................................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
INTEGRATED AMPLIFIER
'10.09
P.O.Box 1, Hamamatsu, Japan
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.
A-S500/A-S300