Yamaha rv 1103

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AV RECEIVER

BX-V793/R-V1103

SERVICE MANUAL

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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 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 safely 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 servrce required should be per-
formed by an authorized YAMAHA Retailer or the appointed service representative

4_ 5.94M-

IMPORTANT: The resentarion or snleot' this manual to any individual or firm does not constitute authorization.
i eerti canon or recognition of any applicabe technical capabilities, or establrshaprinciple-agent

- relationship of any form,

W 1 The data provided is believed to be accurate and applicable to the unil(s) indicated on the cover. The research. engineering.
and service departments of YAMAHA are continually strivtng to improve YAMAHA products. Modifications are. there-
fore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy
appear to exist, please contact the distributors 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: Tm}? the unit OFF during disassemhly and par! replacement. Recheck all work before you apply power
to t e unit. .

I CONTENTS

TO SERVICE PERSONNEL .............. 1 IC DATA ...... ............ 29~38
REAR PANELS . DISPLAY DATA ............. 39
SPECIFICATIONS 4~5 PRINTED CIRCUIT BOARD .. 40~55
INTERNAL VIEW 6 PIN CONNECTION DIAGRAM . . 56

DISASSEMBLY PROCEDURES 6 BLOCK DIAGRAM 57~58
SELF DIAGNOSIS FUNCTION....... .......... 7-22 SCHEMATIC DIAGRAM 59-66
FACTORY PRESET . 23 PARTS LIST .......... 67~56

AMP ADJUSTMENTS .
TUNER ADJUSTMENTS ..

. 24 REMOTE CONTROL TRANSMITTER .
25~28

Copyright 2003 YAMAHA CORPORATION YAMAHA
This manual is copyrighted by YAMAHA and may not be copied or

redistributed either in print or electronically without permission. YAMAHA CORPORATION
R0.Box1 ,Hamamatsu,Japan

1.8K-098 Q3? ,5 Printed in Japan 97.12

87~88

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RX-V793/R-V1 I 03

I TO SERVICE PERSONNEL

1. Critical Components Information.
Components having speclal 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 verify
that all exposed conductive surfaces are properly insulated
from supply circuits.

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

o Leakage current must not exceed 0.5mA.

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

WALL
OUTLET

EQUIPMENT
UNDER TEST

AC LEAKAGE
TESTER OR
EQUIVALENT

INSULATING
TABLE

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of 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!

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

your hands before handling food.

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