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STEREO AMPLIFIER
AV-80Y
SERVICE MANUAL
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• CONTENTS
IMPORTANT NOTICE
This manual has been provided for the use of authorized YAMAlIA Retailers and their senice personnel.
It has been assumed that basic service procedures inherant
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 YAMAlIA product owners
that all sezvice required should be performed by an authorized YAMAlIA Retailer or the
appointed service rq>resentative.
IMPORTANT:
The presentation or sale of this manual
to
any individual or finn 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 unites) indicated on the cover. The reserch,
engineering, and service departments of YAMAlIA are continually striving to improve YAMAlIA products.
Modifications are, therefore, inevitable and specifications are subject
to
change without notice or obligatim 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:
Tum the unit OFF during disassembly and parts replacement. Recheck all wolk before you
apply power
to
the unit.
TO SERVICE PERSONNEL
1
REAR PANELS
1-2
SPECiFiCATIONS ....•.•..•.......................•...•.......•...•.•..•...•3
BLOCK DIAGRAM •......•....•.•.•...........•.....•...•....•......... 4-5
INTERNAL VIEW .....•.•....................................................6
DISASSEMBLY PROCEDURES
6-7
ADJUSTMENTS .••.•..........•........................•.•.....•.••.•.....•..7
1
1 003801
PRINTED CIRCUIT BOARD
8-14
INTERCONNECT WIRING DIAGRAM
15
~·COM
DATA
16
WAVEFORM OF TEST POINT
17
SCHEMATIC DIAGRAM
18-19
PARTS LIST ...................••..................•..•................
20-27
REMOTE CONTROL TRANSMITTER
28
YAMAHA
YAMAHA CORPORATION
Po. Box 1, Hamamatsu, Japan
1.4k-346
13
~
Printed in Japan. '91 .2
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