Yamaha ax 500 u

Page 1

STEREO INTEGRATED AMPLIFIER

AX-500/AX-500U

Service Manuals Conlact
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IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel.
It has been assumed thar basic service procedures inheranl (o the: industry, and more spECIIicaIIy Vamaha
Products, are already known and understood by the users, and have Ihereiorc not been restated.

5'

WARNING: Failure to IcllIow appropriate service and salary procedures when sen/icing this product
may result in personal iniury, destruction of :xpensm components and failure of the
product to perform as specified. For these reasons, we advise all Yamaha product owners

I that all servrce required should be performed by an authorized Yamaha Relailel 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 a principle-agent relationship of any form

The data provided is believed to be acnuraic and applicable to me unilIs) indicated on the cover. The

research, engineering, and servrce departments of Yamaha are continually striving to improve Yamaha

products. Modifications are, therelurc, inevitable and specificalions are subiect to change without notice or

obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Servicn

Division

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your
body may have accumulated by rOVndlng yourself to the ground buss in the unit (heavy
gauge black wires connect to this buss),

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before
you apply power to the unit.

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I CONTENTS

DISASSEMBLY PROCEDURES .

Mil-II

PARTSLIST...............

TOSERVICEPERSONNEL.................I ..H...5

FRONTPANELS.....................,..1 ADJUSTMENTS....... . .....5

REARPANELS.r..r....................2 PRINTEDCIRCUITBOARD... ....6~8

SPECIFICATIONS.......................3 WIRING.............. .. .......9

f INTERNALVIEW......,........r.......3 SCHEMATICDIAGRAM... ......10
4

BLOCKDIAGRAM

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Page 2

AX-SOO/AX-SOOU

I TO SERVICE PERSONNEL

1. Critical Components information.

Components having special characteristics are marked L
and must be replaced with parts having specifications equal
to those originally installed.

Leakage Current Measurement (For 120V Model Only):
When service has been completed. it is imperative that you
verify that all exposed conductive surfaces are properly
insulated from supply circuits.

Meter impedance should be equivalent to 1500 ohm shunted
bv 0.15MF.

Leakage current must not exceed 0.5mA.

I Be sure to test {or leakage with the AC plug in both polarities:

I FRONT PANELS
V U.S.A. 81 Canadian models

AC LEAKAGE TESTER
OR EQUIVALENT

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WALL f

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OUTLET lNSULATlNG TABLE

For Service ManUals Contact
MAURITRON TECHNlCAL SERVICES
3 Cherry Tree Rd, Chinnor
Oxon OX9 4QY
TOI': 018444351694 Faxt- 01844-352554
Emallz- enqflries®mauri|mneom

EQUIPMENT
UNDER TEST

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