STEREO AMPLIFIER
AV-80Y
SERVICE MANUAL
r
-----.:-------
o
=
Hmodel only
-
0-
WI
····
. . . .
':
• • • •
I-
o • • •
0-
I • • •
I-
I • • •
.-
- - - - -
................
•
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 aprinciple-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
11
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
