Yamaha as 2000

Page 1

STEREO AMPLIFIER

A-SZOOO

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 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 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 a principleragenl relationship of any form.

The data provided is believed to be accurate and applicable to [he unii(s) indicaied 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
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. Racheck all work before you apply power to the unit.

I CONTENTS

TO SERVICE PERSONNEL
FRONT PANEL .
REAR PANELS .
REMOTE CONTROL PANELS. 6
SPECIFICATIONS / figfifi 7
INTERNAL VIEW 8
SERVICE PRECAUTIONS /

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DISASSEMBLY PROCEDURES / fl§¥lllfi
AMP ADJUSTMENT / Tngfifig .
UPDATING FIRMWARE /

7 7' -.L\ '7 I 7®§§ 3A]! 21-27

9
9-18
19-20

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This Service Manual uses recycled paper.

@2008 YAMAHA mama/mow All rights reserved.
Thls manual is oopyrlghled by VAMAHA and may not be copied or
redistributed ellher in print or electronically Without permission.

SELF-DIAGNOSTIC FUNCTION /
9'4 77 (a aéafisltfifie) ..................................... 28-30

IC DATA 31-34
PIN CONNECTION DIAGRAMS 35-36
BLOCK DIAGRAM .. 37

PRINTED CIRCUIT BOARDS 38-58
SCHEMATIC DIAGRAMS 59-66
REPLACEMENT PARTS LIST 67-87
REMOTE CONTROL. 88-89

fiYAMAHA

YAMAHA CORPORATION

P.O.Box 1, HamamaIsu, Japan
g 08.01

OOOZS'V

Page 2

A-SZOOO

A-SZOOO

I TO SERVICE PERSONNEL

1. Critical Components Information
Components having special characteristics are marked "I
and must be replaced with parts having specifications equal
to those originally installed.

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

0 Meter impedance should be equivalent to 1500 ohms shunted
by 0.15m:

AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT

@ID-

J;-

INSULATING
TABLE

0 Leakage current must not exceed 0.5mA.
0 Be sure to test for leakage with the AC plug in both polarities.

WARNING: CHEMICAL CONTENT NOTICE!

This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive

harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY

REASON WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose

eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before

handling food.

About lead free solder / #fififl / Silzal, \ C

All of the P.C.B.s installed in this unit and solder joints are
soldered using the lead free solder.

Among some types of lead free solder currently available,
it is recommended to use one of the following types for the
repair work.

- Sn + Ag + Cu (tin 4- silver + copper)
- Sn + Cu (tin + copper)
- Sn + Zn + Bi (tin + zinc + bismuth)

Caution:
As the melting point temperature of the lead free solder is
about 30°C to 40°C (50°F to 70°F) higher than that of the lead
solder, be sure to use a soldering iron suitable to each solder.

I FRONT PANEL

A-SZOOO (U, C, R, T, K, A, B, G, L, J models)

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