Yamaha rx v550 v450 htr 5750 5740 dsp ax450

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AV RECEIVER/AV AMPLIFIER
RX-V550/HTR-5750

RX-V450/HTR-5740/DSP-AX450

SERVICE MANUAL

IMPORTANT NOTICE

This manual has been provided for the use or authorized YAMAHA Retailers and their service personnel.
it has been assumed that basic service procedures inherent to the industry, and more speciticaliy YAMAHA Products, are already
known and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate servtce and safety 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 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 establish a principleragem 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 disiiibulois 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. Recheck all work before you apply power to the unit.

I CONTENTS

TO SERVICE PERSONNEL .......................................... 2
IMPEDANCE SELECTOR ............................................. 3
FRONT PANELS ........................................................ 4~6
REAR PANELS ...................... . 7~15
REMOTE CONTROL PANELS. 16
SPECIFICATIONS / §%I:I:I§fi . 17~18
INTERNAL VIEW ................ 18
DISASSEMBLY PROCEDURES / fifl¥¥ll§ ......... 19~21
SELF DIAGNOSIS FUNCTION (DIAG) /

Eafiéfifiigfi'é (57477") ..................................... 22~42

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This Service Manual uses recycled paper.

AMP ADJUSTMENT / 7 >7§I§§E¥ ........................... 43
IC DATA ................................................................. 44~49
BLOCK DIAGRAM ................................................. 50~51
DISPLAY DATA ............... 52
PRINTED CIRCUIT BOARD .. 53~73
PIN CONNECTION DIAGRAM 74
SCHEMATIC DIAGRAM ........................................ 75~85
PARTS LIST ......................................................... 87~123
REMOTE CONTROL .......................................... 124~125

YAMAHA

YAMAHA CORPORATION

P.O.Box 1, Hamamaisu. Japan

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