Yamaha rx 450

Page 1

STEREO RECEIVER

X-450

Wilma mm mm air-nee n-

RIE WEB/35]: Mfllmt

5: - nun-mm 4 Iml
- 11..
a. 1,. .--. ._ __ Es.

WARNING:

WARNING.

(This manuat has been provided for the use of authorized YAMAHA Reuileis and than service personnel.
1: has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA
Products are alread1 known and understood by the users and have Lhercfore not been muted.

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
pmducl to perform as specified. For these masons, we advise an YAMAHA product owners
that any service required should be performed by an authorized YAMAHA Retailer or the
appuinch service representative,

IMPORTANT: The prescnulion or sale of this manual to any individual or firm does not consLItule
authorization, ceniiication or recognition of any applicable technical capabilities. or
establish a principle-agent relationship of any form.

The data provided is believed to bc accurate and applicable to the unit(s) indicated on the covu. The much
enginaenng, znd service departments of YAMAHA are conu'nuauy striving to improve YAMAHA pmducls
Modifications are therefore. incvitable and spcufications ire subject to change without notice or obligation to
retrofit. Should any discrepancy appear Io exist, please contact the distributor's Sea-vice Division.

IMPORTANT NOTICE W

SulIc discharges can destroy expensive components. Discharge any static electricity your

body may have accumulated by grounding youmtr ID the gmund buss in Lhc unit (heavy
gauge black wires connect to this buss).

l IMPORTANT: Turn the unir OFF during disassembly and part replacement. Recheck :11 work 1x101: you

apply power to the unit.

I CONTENTS

T0 SERVICE PERSONNEL
REAR PANELS ...... .......

INTERNAL v1Ew..
SPECIFICATIONS
DISASSEMBLY PROCEDURE
ADJUSTMENTS
u-coM DATA
DISPLAY DATA .............................. . .......... .. ................. 11

100364

BLOCK DIAGRAM ...............
PRINTED CIRCUIT BOARD
INTERCONNECT WIRING DIAGRAM
WAVEFORM OF TEST POINT
SCHEMATIC DIAGRAM
FRONT END PACK .
PARTS LIST ..... 24~31
REMOTE CONTROL TRANSMITTER .......................... 32

YAMAHA

YAOMAHA CORPORATION
80x1 Hamamaisu Japan

1L1 11:11 1- 11111

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RX-450

I TO SERVICE PERSONNEL

1.

Critical Components Infonnaticnt

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

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

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

Leakage current must not exceed 0.5mA.

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

AC LEAKAGE
WALL EQUIPMENT TESTER on
OUTLET UNDER TEST EQUIVALENT
iNsULATING =
TABLE

0 POLARIZATION (U model only)

This amplilier product is equipped with a polarized altemat-
ing»current line plug (a plug having one blade wider than the
other) This plug will fit into the power outlet only one way.
This is a salety feature.

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
Weliare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACESOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR
ANY REASON WHAT SO EVER!

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

It 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 USA a Canadian models

Y General model