Yamaha RX-V495 - Service Manual

100650
AV RECEIVER
RX-V495/RX-V495RDS/
HTR-5140/HTR-5140RDS
TO SERVICE PERSONNEL ........................................... 1
REMOTE CONTROL PANELS....................................... 1
FRONT PANELS ............................................................. 2
REAR PANELS ........................................................... 3~4
SPECIFICATIONS....................................................... 5~6
INTERNAL VIEW ............................................................ 7
DISASSEMBLY PROCEDURES .................................... 7
SELF DIAGNOSIS FUNCTION ................................ 8~19
FACTORY PRESET ...................................................... 20
■ CONTENTS
AMP ADJUSTMENT ..................................................... 21
TUNER ADJUSTMENT........................................... 22~25
IC DATA .................................................................. 26~35
DISPLAY DATA ........................................................... 36
BLOCK DIAGRAM .................................................. 37~39
PRINTED CIRCUIT BOARD ................................... 40~57
SCHEMATIC DIAGRAM ......................................... 58~65
PARTS LIST ............................................................ 66~81
REMOTE CONTROL TRANSMITTER ......................... 82
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, 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 of 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.

Summary

Important Service and Safety Notices

Service Safety Procedures Warning

Warns about personal injury and component destruction from improper service.

Static Discharge Prevention

Advises grounding to prevent damage from static electricity.

Disassembly and Power-On Safety

Instructs to turn off the unit before disassembly and recheck work.

TO SERVICE PERSONNEL

Critical Component Replacement

Emphasizes replacing critical components with equivalent parts.

Leakage Current Measurement

Details the procedure for measuring leakage current for safety.

SPECIFICATIONS

Audio Section Specifications

Details audio output power, sensitivity, and tone control specs.

FM Section Specifications

Lists FM tuning range, sensitivity, and selectivity data.

AM Section Specifications

Lists AM tuning range and sensitivity data.

DISASSEMBLY PROCEDURES

Top Cover Removal Procedure

Step-by-step guide for removing the top cover.

Front Panel Disassembly

Steps for removing knobs and screws to access the front panel.

SELF DIAGNOSIS FUNCTION

Self Diagnosis Function Purpose

Explains the function's purpose for locating faulty parts.

BEGINNING AND CANCELLATION

Diagnostic Program Start-Up

Details how to initiate the diagnostic program using front panel keys.

History of protection function

Exiting the Diagnostic Function

CONTENTS OF DIAGNOSIS FUNCTION

Diagnosis Menu 1: Analog Through

Describes analog signal path and bypass modes.

Diagnosis Menu 2: DSP Through

Diagnosis Menu 3: AC3 Through

Diagnosis Menu 4: Pro Logic

Diagnosis Menu 5: Speaker Settings

Diagnosis Menu 6: Display Check

Diagnosis Menu 7: Manual Test

Diagnosis Menu 8: Factory Preset

Diagnosis Menu 9: AD Data Check

Diagnosis Menu 10: DSP Status

Diagnosis Menu 11: CPU Info & Exit

System Factory Preset Settings

Main Amplifier Idling Current Check

TUNER ADJUSTMENT

Tuner Adjustment Measuring Instruments

Lists required instruments for tuner adjustments.

Tuner Adjustment Test Points

Identifies key test points for tuner adjustments.

FM Adjustment

FM Alignment Pre-Adjustment Steps

Notes on modulation, deviation, and transformer connection.

FM Alignment Measurement Setup

Diagrams showing instrument connections for adjustments.

AM Adjustment

AM Alignment Measurement Setup

Diagram showing instrument connections for AM adjustment.

System Block Diagram (Part 1)

System Block Diagram (Part 2)

Printed Circuit Board Layouts (Tuner)

Tuner PCB Assembly List

Lists part numbers for tuner PCB assemblies by model.

Tuner PCB Layouts (J, U, C, R, T, A, L)

Tuner PCB Layouts (B, G)

SCHEMATIC DIAGRAM (INPUT)

SCHEMATIC DIAGRAM (MAIN)

SCHEMATIC DIAGRAM (OPERATION)

SCHEMATIC DIAGRAM (DSP)

SCHEMATIC DIAGRAM (TUNER) J, U, C, R, T, A, L models

SCHEMATIC DIAGRAM (TUNER) B, G models

EXPLODED VIEW

Yamaha RX-V495 Specifications

General

Brand	Yamaha
Model	RX-V495
Category	Receiver
Language	English