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Yamaha RX-V557 - Service Manual

Yamaha RX-V557
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SERVICE MANUAL
100941
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 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
contact the distributor's 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 disassembly and part replacement. Recheck all work before you apply power to the unit.
■ CONTENTS
TO SERVICE PERSONNEL .......................................... 2
FRONT PANELS ........................................................ 3~6
REAR PANELS ........................................................ 6~15
SPECIFICATIONS / 参考仕様 ................................ 16~18
INTERNAL VIEW ................................................... 18~19
REMOTE CONTROL PANELS .................................... 19
DISASSEMBLY PROCEDURES/分解手順 ......... 20~23
SELF DIAGNOSIS FUNCTION (DIAG)/
自己診断機能（ダイアグ）..................................... 24~44
AMP ADJUSTMENT/アンプ部調整 ........................... 45
IC DATA ................................................................. 46~51
BLOCK DIAGRAM ................................................. 52~55
DISPLAY DATA ........................................................... 56
PRINTED CIRCUIT BOARD .................................. 57~79
PIN CONNECTION DIAGRAM .................................... 80
SCHEMATIC DIAGRAM ........................................ 81~93
PARTS LIST ......................................................... 95~129
REMOTE CONTROL.......................................... 130~131
AV RECEIVER/AV AMPLIFIER
RX-V557/HTR-5850/DSP-AX557
RX-V457/HTR-5840/DSP-AX457
RX-V557/HTR-5850/DSP-AX557
RX-V457/HTR-5840/DSP-AX457
P.O.Box 1, Hamamatsu, Japan
'05.03

Table of Contents

Other manuals for Yamaha RX-V557

Preview: Owner's Manual
Owner's Manual92 pages

Questions and Answers

  • A
    Amber WallaceSep 15, 2025
    Why can I only hear sound from one speaker on my Yamaha RX-V557?
    • J
      Joshua LamSep 16, 2025
      If you're only hearing sound from one speaker connected to your Yamaha Receiver, check the cable connections to ensure they are properly connected and not defective. Also, verify the balance settings in the SET MENU and adjust the SP LEVEL settings as needed.
  • C
    colleen74Aug 25, 2025
    Why does the sound suddenly go off on my Yamaha RX-V557 Receiver?
    • T
      Tina ClarkAug 25, 2025
      If the sound on your Yamaha Receiver suddenly goes off, it could be due to a few reasons. The protection circuitry might have been activated because of a short circuit, so check that the impedance selector setting is correct. Alternatively, the sleep timer might have turned the unit off, so turn the power back on and play the source again. Also, verify that the unit isn't muted by pressing the MUTE button.
  • J
    Jessica StricklandAug 25, 2025
    What to do if my Yamaha RX-V557 has no sound?
    • Y
      Yvonne RoseAug 26, 2025
      If your Yamaha Receiver isn't producing any sound, here are a few things to check: * Ensure all input and output cables are properly connected and not defective. * Select an appropriate input source using the INPUT, MULTI CH INPUT, or input selector buttons. * Make sure speaker connections are secure. * Select the correct front speakers with SPEAKERS A and/or B. * Increase the volume and ensure the unit isn't muted by pressing MUTE. * If playing a DTS signal, set the input mode to AUTO or DTS. * Also, ensure you are playing a source that the unit can reproduce.
  • A
    armstrongpamelaAug 26, 2025
    Why won't my Yamaha RX-V557 Receiver turn on or stay on?
    • D
      Danny PattersonAug 27, 2025
      If your Yamaha Receiver fails to turn on or enters standby mode shortly after being powered on, consider the following: * Ensure the power cord is securely connected. * Verify the impedance setting matches your speakers. If it’s incorrect, set the impedance to match your speakers. * Check speaker wire connections for any shorts, making sure the wire for each connection does not touch anything other than its respective connection. * If the unit experienced a strong electric shock, put it in standby mode, unplug the power cord for 30 seconds, then plug it back in and try again.
  • K
    Kenneth TannerSep 16, 2025
    Yamaha RX-V557: How to enable sound from effect speakers?
    • J
      Jennifer GonzalezSep 16, 2025
      If you're not hearing sound from the effect speakers on your Yamaha Receiver, make sure the sound field programs are turned on by pressing STRAIGHT (EFFECT). Also, consider that the current source or program combination may not output sound from all channels, so try another sound field program.
  • S
    Susan AndersonSep 23, 2025
    Why can't I record a source with an analog component connected to the AUDIO OUT jacks on my Yamaha RX-V557?
    • M
      Morgan ParkerSep 23, 2025
      If you're unable to record a source using an analog component connected to the AUDIO OUT jacks on your Yamaha Receiver, make sure the source component is connected to the unit’s analog AUDIO IN jacks.
  • K
    karenhahnSep 8, 2025
    How to unlock sound field parameters on Yamaha RX-V557?
    • J
      joseavilaSep 8, 2025
      If you are unable to change the sound field parameters and some other settings on your Yamaha Receiver, check if “MEMORY GUARD” in SET MENU is set to ON. If it is, select OFF.
  • W
    Willie JohnstonSep 9, 2025
    What to do if Yamaha Receiver cannot tune into desired station?
    • H
      hutchinsontoddSep 9, 2025
      If you cannot tune into the desired station with the automatic tuning method on your Yamaha Receiver because the signal is too weak, use a high-quality directional FM antenna.
  • C
    Charles JenkinsSep 2, 2025
    How to fix no sound from surround speakers on Yamaha RX-V557 Receiver?
    • J
      James PetersonSep 2, 2025
      If you're not getting any sound from the surround speakers on your Yamaha Receiver, try the following: * Increase the output level of the surround speakers. * In the SET MENU, make sure that “SUR. LR” is set to the appropriate setting for the surround left and right speakers, not NONE. * If playing a monaural source with STRAIGHT, press STRAIGHT (EFFECT) to turn on the sound fields.
  • G
    gibsonchristopherAug 31, 2025
    Why is there no sound from the surround back speaker on my Yamaha Receiver?
    • M
      Michael RoblesAug 31, 2025
      If you're not getting sound from the surround back speaker on your Yamaha Receiver, check the “SUR. LR” and “SUR. B” settings in SET MENU. If the surround left and right speakers are set to NONE, the surround back speaker setting is automatically set to NONE, so select the appropriate setting for the surround speakers. Also, ensure that “SUR. B” is set to LRG or SML, not NONE.

Summary

IMPORTANT NOTICE

TO SERVICE PERSONNEL

Critical Components Information

Details about components requiring special attention and replacement with identical specifications.

Leakage Current Measurement

Procedure and limits for verifying insulation and leakage current for 120V models, checking plug polarity.

FRONT PANELS

RX-V557 (U, C models)

Front panel layout illustration for RX-V557 U and C models.

RX-V557 (R, T, K, A, B, G, E, L models)

Front panel layout illustration for RX-V557 R, T, K, A, B, G, E, L models.

REAR PANELS

RX-V557 (U, C models)

Rear panel connection and port illustration for RX-V557 U and C models.

SPECIFICATIONS; 参考仕様

Audio Section; オーディオ部

Details minimum RMS output power, dynamic power, damping factor, input sensitivity, and frequency response.

Video Section; ビデオ部

Covers video signal types, levels, and formats for different models and conversions.

FM Section; FM部

Provides FM tuning range, sensitivity, selectivity, and frequency response data.

General; 総合

Details power supply, consumption, dimensions, weight, and available finishes.

INTERNAL VIEW

■ Set Menu Table; セットメニュー

Tables detailing setup menus for basic and manual configurations, speaker settings, and input assignments.

REMOTE CONTROL PANELS

■ DISASSEMBLY PROCEDURES; 分解手順

1. Removal of Top Cover

Instructions for removing the top cover by unscrewing and sliding it rearward.

2. Removal of Front Panel Unit

Steps to remove the front panel unit, including knobs, support top, and screws.

5. Removal of DSP P.C.B.

Detailed instructions for removing the DSP P.C.B., including screw and connector disconnections.

7. Removal of MAIN (1), (5) and POWER (1), (2) P.C.B.s

Procedure for removing MAIN and POWER P.C.B.s, including cable disconnections and grounding checks.

■ SELF DIAGNOSIS FUNCTION (DIAG)／自己診断機能（ダイアグ）

No DIAG menu sub-menu

Lists the available DIAG menu items and their corresponding sub-menus for various functions.

• Starting DIAG

• Display provided when DIAG started

• History of protection function

• Operation procedure of DIAG menu and SUB-MENU

• Details of DIAG menu

1. BYPASS

Allows selection between analog bypass output or DSP bypass output.

2. RAM THROUGH

4. SPEAKERS SET

7. DISPLAY CHECK

8. MANUAL TEST

10. AD DATA CHECK

DC;PS (protection detection)

Displays DC protection values and power supply voltage protection values.

14. DSP BUS CHECK

18. SOFT SW

SW MODE: PCB, MODEL or FNC

Allows selection of SW MODE as PCB, MODEL, or FNC.

19. SOFTWARE VERSION

■ AMP ADJUSTMENT; アンプ部調整

Confirmation of Idling Current of MAIN (1) P. C. B.

Checks idling current by measuring voltage across terminals after power on and after repair.

■ IC DATA

IC5: D60 YA003 BPYP225 (DSP P.C.B.) Decoder

Detailed pin assignments and functions for IC5 (DSP P.C.B. Decoder).

IC451: M30626 FHPFP (SUBTRANS P.C.B.) 16 bit µ-COM (Main CPU)

■ BLOCK DIAGRAM (1;2) RX-V557;HTR-5850;DSP-AX557

■ BLOCK DIAGRAM (2;2) RX-V557;HTR-5850;DSP-AX557

■ DISPLAY DATA

● ANODE CONNECTION

Details the anode connections for the FL display panel.

■ PRINTED CIRCUIT BOARD (Foil side)

■ SCHEMATIC DIAGRAM (DSP 1;2)

■ SCHEMATIC DIAGRAM (DSP 2;2)

■ SCHEMATIC DIAGRAM (FUNCTION)

■ SCHEMATIC DIAGRAM (OPERATION)

■ SCHEMATIC DIAGRAM (MAIN)

■ SCHEMATIC DIAGRAM (POWER)

■ SCHEMATIC DIAGRAM (SUBTRANS)

■ SCHEMATIC DIAGRAM (CONVERSION)

■ SCHEMATIC DIAGRAM (VIDEO)

■ SCHEMATIC DIAGRAM (XM)

■ ELECTRICAL PARTS

P.C.B. DSP

List of parts for the DSP P.C.B., including part number, description, remarks, and market.

P.C.B. OPERATION & P.C.B. MAIN

P.C.B. MAIN

P.C.B. POWER

P.C.B. SUBTRANS

P.C.B. SUBTRANS & P.C.B. CONVERSION

P.C.B. CONVERSION

P.C.B. VIDEO & P.C.B. XM

Chip Parts

■ MECHANICAL PARTS RX-V557;DSP-AX557

■ EXPLODED VIEW (AMP UNIT) RX-V557;DSP-AX557

■ EXPLODED VIEW HTR-5850 RX-V457;HTR-5840;DSP-AX457

■ MECHANICAL PARTS HTR-5850 RX-V457;HTR-5840;DSP-AX457

■ REMOTE CONTROL RAV254: RX-V557 (U, C, R, T, K, A, L models), HTR-5850, DSP-AX557, RX-V457 (U, C, R, T, K, A, L models), HTR-5840 (U, C, T, K, A models), DSP-AX457

● SCHEMATIC DIAGRAM

Schematic diagram of the RAV254 remote control.

■ REMOTE CONTROL RAV304: RX-V457;HTR-5840 (B, G, E models)

● SCHEMATIC DIAGRAM

Schematic diagram of the RAV304 remote control.

Parts List for Carbon Resistors

Yamaha RX-V557 Specifications

General IconGeneral
Total Harmonic Distortion (THD)0.06%
Input Sensitivity200 mV
Signal-to-Noise Ratio100 dB
Response Bandwidth20 Hz - 20 kHz
Input Impedance47 kOhm
Audio D/A Converter24-bit/192 kHz
Built-in DecodersDolby Digital, DTS
Digital Sound Processor (DSP)Yes
Tuner BandsAM/FM
Tuning RangeAM: 530 - 1710 kHz, FM: 87.5 - 108 MHz
Preset Station Qty40
Digital Audio InputsOptical, Coaxial
Surround SoundYes
Power Output (per channel)85 Watt
Frequency Response10 Hz - 100 kHz
Connector TypeRCA
Video Inputs/OutputsComposite, S-Video

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