Yamaha rx v490

Page 1

RX-V4 90/ R-V701

STEREO RECEIVER

SERVICE MANUAL

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TO SERVICE PERSONNEL
REAR PANELS
SPECIFICATIONS
INTERNAL VIEW .
DISASSEMBLY PROCEDURES .
TEST SIGNAL PROGRAM
ADJUSTMENTS

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 speci<
fied. 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 establishaprinciple-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, engineer-
ing, 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 discrep-
ancy 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: Tum the unit OFF during disassembly and part replacement. Recheclt all work before you apply power

\ to the unit. /

BLOCK DIAGRAM
PRINTED CIRCUIT BOARD .
DISPLAY DATA
TEST POINT WAVEFORMS.
SCHEMATIC DIAGRAM .
PARTS LIST..
REMOTE CONTROL TRANSMITTER.

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YAMAHA CORPORATION
P.O.Box1 ,Hamamatsu,Japan

1,85k-484 l© Printed in Japan '95.3

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RX-V490IR-V70 1

I TO SERVICE PERSONNEL

1, Critical Components Information. AC LEAKAGE
Components having special characteristics are marked and WALL EQUIPMENT TESTER OR
must be replaced with pans having specifications equal to OUTLET UNDER TEST EQUIVALENT
those originally installed.

2. Leakage Current Measurement (For 120V Models Only). ® :ID
When service has been completed. it is imperative to verify :
that all exposed conductive surfaces are properly insulated =
from supply circuits. ' |NS+iigiTéNG

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

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 WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale
solder fumes or expose eyes to solder/flux vaporl

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

I REAR PANELS

V RX-V490/R-V701 U model

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