Yamaha ax 1090

Page 1

STEREO INTEGRATED AMPLIFIER

X-1 090

SERVICE MANUAL

l

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
Produos, 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 at 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 contacl the distributofs 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. /
I CONTENTS
TO SERVICE PERSONNEL 1 it-COM DATA .. ........ ........... 5
REAR PANELS . 1 PRINTED CIRCUIT BOARD ....... ....... 6~16
SPECIFICATIONS .2 BLOCK DIAGRAM ..... ............. ................ 17
INTERNAL VIEW ......................... ....... 3 SCHEMATIC DIAGRAM . ........ ........ 18~19
DISASSEMBLY PROCEDURES............ ................... . 3 PARTS LIST ............... ........... 20~31
ADJUSTMENTS... REMOTE CONTROL TRANSMITTER..

tiMA

RPORA
flfilggamatsu, £2,1th

1414-985 in] Q5 printed in Japan 96. 6

060 l'XV

Page 2

AX-1 090

AX-1090

I TO SERVICE PERSONNEL

Critical Components lnlormation.

Components having special characteristics are marked and
must be replaced with pans having specilipatlons equal to
those originally installed. -

I REAR PANELS

V G model

AC LEAKAGE
WALL EQUIPMENT TESTEFI OR
OUTLET UNDER TEST EQUIVALENT

@ID-

INSULATING
TABLE

4-

mum!!-
m

in:

mum

mevva

(é

+9»

- l
(49

: Him when) swim

©

Annual-nu.

E?)

@EE

a 2mm mien gains