Yamaha rx 496

Page 1

STEREO RECEIVER

RX-396/496 I

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, desrruction 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 rcprcsentativc,

IMPORTANT: The presentation or sale of this manual to any individual or firm docs not constitute
,1 authorization. certification or recognition of any applicable technical capabilities. or
establish a principle-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.
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 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: 'hrm the unit OFF during disassemhly and part replacemenrt Recheck all work before you

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ICONTENTS
TOSERVICEPERSONNEL 1 ICDATA 15~16
FRONTPANELS . ...2 DISPLAYDATA., .. ..17
REARPANELS 3~4 BLOCKDIAGRAM........................18~19
SPECIFICATIONS 5~6 RX-396PRINTEDGIRCUITBOARD..........20~29
INTERNALVIEW.............................7 RX-496PRINTEDCIRCUITBOARD,.........30~39
DISASSEMBLY PROCEDURES ...............7~8 PINCONNECTION DIAGRAM 39
TESTMODE .9 RX-SQGSCHEMATICDIAGRAM... . .40~43
PROTECTION OPERATION CHECK FUNCTION . . . 9 RX-496 SCHEMATIC DIAGRAM . . . . . . . . . . . . .44~47
AMPADJUSTMENTS 10 PARTSLIST.............................48~64
TUNERADJUSTMENTS ...................,11~14 REMOTECONTROLTRANSMITTER............65

/

Copyright 2004 YAMAHA CORPORATION
1 0 0 63 6 This manual is copyrighted by YAMAHA and may not be copied or
' redistributed either in print or electronically without permission.

XWHA ORPOFAIJON
. . x1, amama su, apan
2.45K-176 IE EPrinted in Japan 98.6

QGVIQGS'XH

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RX-396/496

FIX-3961496

I TO SERVICE PERSONNEL

1. Critical Components lntormation.

Components having special characteristics are marked A WALL EQUIPMENT AgslfitiégggE

and must be replaced with parts having specifications equal

0 those originally installed. OUTLET UNDER TEST EQUIVALENT
2. Leakage Current Measurement (For 120V Models Only). ® :3-

When service has been completed, it is imperative to verify F

that all exposed conductive surfaces are properly insulated _

from supply clrcutts. INSULATING

TABLE

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 tor leakage with the AC plug in both
polarities.

CAUTION
F1 01 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 5.0A, 125V FUSE."

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 01 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 vapor!

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

(
WARNING \
Do not change the IMPEDANCE SELECTOR switch
setting whlle the power to this unit is on, otherwise
this unit may be damaged.

IMPEDANCE SELECTOR

_.... 00' a

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