Yamaha rx v492

Page 1

AV RECEIVER

RX-V492/R-V702/
RX-V492 RDS

SERVICE MANUAL

/

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
[t 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 restatedt

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 principle-agent relationship of any form.

The data provided is believed lobe 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 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. Rechcck all work before you
apply power to the unitt /

IMPORTANT NOTICE \

I CONTENTS

TOSERVICEPERSONNEL 1
FRONTPANELS ......

REAR PANELS
SPECIFICATIONS .
INTERNALVIEW 7
DISASSEMBLY PROCEDURES ..............7~8
SELFCHECKMODE.......................9~11
PROTECTION OPERATION CHECK FUNCTION . .12
AMP ADJUSTMENTS

Copyright 2003 YAMAHA CORPORATION
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.

TUNER ADJUSTMENTS ..... . . . . . . . . . ..... 14~17
DISPLAYDATA.............................18
ICDATA................... . ..19~22
PRINTEDCIRCUIT BOARD ..... ........24~35
BLOCKDIAGRAM........................36~38
PINCONNECTIONDIAGRAM 39
SCHEMATIC DIAGRAM . ....40~43
PARTSLIST.............................44~58
REMOTE CONTROL TRANSMITTER............59

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RX-V492/R-V702IRX-V4SZRDS

I TO SERVICE PERSONNEL

1. Critical Components Information.
Components having special characteristics are marked A
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 verily
that all exposed conductive surfaces are properly insulated
from supply circuits.

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.15pF.

o Leakage current must not exceed 0.5mA.

0 Be sure to test for leakage with the AC plug in both
polarities.

WALL
OUTLET

®

=D-

AC LEAKAGE
EQUIPMENT TESTER OR
UNDER TEST EQUIVALENT
INSULATING
TABLE

CAUTION"
"F101 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE 5.0A, 125V FUSE."
_A_V

CAUTION

F101 : REPLACE WITH SAME TYPE 5.0A, 125V FUSE.

ATTENTION

F101 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 5.0A, 125V.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production ol this product contains LEAD. In addition, other electrical/electronic and/or
plastic (where applicable) components may also contain traces of chemicals found by the California Health and
Welfare Agency (and possibly other entities) to cause cancer and/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!

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

before handling lood.