Yamaha rx v300 k

Page 1

AV RECEIVER

RX-V300K/R-V302K

SERVICE MANUAL

°= VAIMIIA mummy-mu MM W

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 thc product to perform as speci-
fied. For these reasons, we advise all YAMAHA product owners that any service required should be
performed by an authonzed YAMAHA Retailer or the appointed service representative

IMPORTANT: The presentation or sale of this manual to any individual of firm does not constitute authorization.
certification or recognition of any applicable technical capabilities, or establish a principle-agent rela-
tionship of any form.

The data provided is believed to he 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, 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: Turn the unit OFF during disussembly and part replacement. Recheck all work before you apply power

to the unit,
\ /

. I CONTENTS

TO SERVICE PERSONNEL
REAR PANELS

BLOCK DIAGRAM
.1~2 PRINTED CIRCUIT BOARD

.17~19
.20~27

SPECIFICATIONS DISPLAY DATA ............... ....28
INTERNAL VIEW TEST POINT WAVEFORMS .......29
DISASSEMBLY PROCEDURES . . 5~6 SCHEMATIC DIAGRAM . . 30~34
SELF CHECK MODE......... ....... .7~9 PARTS LIST .................. .35~46
ADJUSTMENTS ..10~13 REMOTE CONTROL TRANSMITTER 47

IC DATA. ..14~16

l

Copyright 2003 YAMAHA CORPORATION YAMAHA
This manual is copyrighted by YAMAHA and may not be copied or YAMAHA CORPORAHQN
redistributed either in print or electronically without permission. RO.BOX1,Hamamaisu,Japan

1.05K-4521QLP g Printed in Japan 97.10

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RX-V300KlR-V302K

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 [(0 LEAKAGE
originally installed. WALL EQUIPMENT TESTER OR
EQUIVALENT
2. Leakage Current Measurement (For 120V Model only). OUTLET UNDER TEST
When service has been completed. it is imperative that you :D
verify that all exposed conductive surfaces are properly insu- ® r
lated from supply circuits. __
0 Meter impedance should be equivalent to 1500 ohm shunted INSULATING
by 0.15 uF. TABLE
0 Leakage current must not exceed 0.5mA.
0 Be sure to test for leakage with the AC plug in both polarities.
"CAUTION" .
"F101: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 5.0A, 125V FUSE
(U,R models), 1. 6A 125v FUSE (L model)"
_A_V -:"F102 FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2. 5A, 250V FUSE
(L model)"
"F103: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1. 6A, 250V FUSE
(R model)

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 oi 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/ERECTRONIC 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.