Yamaha dsp ax557

Page 1

AV RECEIVER/AV AMPLIFIER
RX-V557IHTR-5850IDSP-AX557

RX-V457IHTR-584OIDSP-AX457
SERVICE MANUAL

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contact the distributor's Service Division.

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IMPORTANTNOTKHE

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 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 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

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 disassembly and part replacement. Recheck all work before you apply power to the unit.

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l CONTENTS
TO SERVICE PERSONNEL .......................................... 2 AMP ADJUSTMENT / 7>7afislfl§ ........................... 45
FRONT PANELS ........................................................ 3~e IC DATA ................................................................. 4e~51
REAR PANELS ........................................................ 6~15 BLOCK DIAGRAM 52~55
SPECIFICATIONS I éfitfla. 1e~13 DISPLAY DATA ........................................................... 56
INTERNAL VIEW ................................................... 1a~19 PRINTED CIRCUIT BOARD .................................. 5749
REMOTE CONTROL PANELS .................................... 19 PIN CONNECTION DIAGRAM .................................... so
DISASSEMBLY PROCEDURES / mafia ......... 20~23 SCHEMATIC DIAGRAM ........................................ 31~93
SELF DIAGNOSIS FUNCTION (DIAG) / PARTS LIST ......................................................... 95~129
a EFWHEEE (5H 77) ..................................... 24~44 REMOTE CONTROL .......................................... 130431

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This Service Manual uses recycled paper.

Copyright 2005 YAMAHA CORPORATION
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.

100941

.YAMAHA

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Page 2

RX-V557/HTR-5850/DSP-AX557
RX-V457/HTR-5840/DSP-AX457

I TO SERVICE PERSONNEL

1. Critical Components Information AC LEAKAGE
Components having special characteristics are marked & WALL EQUIPMENT TESTER OR

and must be replaced with parts having specifications equal OUTLET UNDER TEST EQUIVALENT
to those originally installed.

2. Leakage Current Measurement (For 120V Models Only) ® 2'3-
When service has been completed, it is imperative to verify J_-

that all exposed conductive surfaces are properly insulated
from supply circuits.

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RX-V457IHTR-5340IDSP-AX457

0 Meter impedance should be equivalent to 1500 ohms INS-PALBAJENG

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.

j: CAUTION
IEEI F1, 2: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE."
V

TAT CAUTION
F1, 2: REPLACE WITH SAME TYPE 8A, 125V FUSE,

ATTENTION
F1, 2: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 8A,125V.

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 REA-
SON 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.

About Lead Free Solder I fififinyfilCDut

The P.C.B.s installed in this unit are soldered using the Zlifilllfifléittmégifiwl\Jfifiljlllfififiétltbfiflyfi
following solder. latFEEODSEDFTL
Component Side/Eliumufi Foil Side / MJfifi
DSP P.C.B. Lead Solder/ fifilb/VJ? Lead Free Solder / gee/war
FUNCTION P.C.B. - Lead Free Solder/fifia/V/Q
OPERATION P.C.B. - Lead Free Solder / fifiB/VJS"
MAIN P.C.B. - Lead Free Solder/flew)?
POWER P.C.B. - Lead Free Solder / fifiG/V/Q
SUBTRANS P.C.B. - Lead Free Solder / fifilfi/ng
CONVERSION P.C.B. Lead Solder/ fifikbflyg Lead Free Solder/fififi/V/Q
VIDEO P.C.B. - Lead Free Solder/fififi/VJQ
XM P.C.B. Lead Solder/ fiukD/V/Q Lead Free Solder/fiaa/V/fij
Side A > SMT REFLOW Process
I a Q
' "t H W
/ Solder Dip\
Side B Ml FLOW Process