Yamaha RX-V550 Service Manual

SERVICE MANUAL
100884
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.
P.O.Box 1, Hamamatsu, Japan
■ CONTENTS
TO SERVICE PERSONNEL .......................................... 2
IMPEDANCE SELECTOR ............................................. 3
FRONT PANELS ........................................................ 4~6
REAR PANELS ........................................................ 7~15
REMOTE CONTROL PANELS .................................... 16
SPECIFICATIONS / 参考仕様 ................................ 17~18
INTERNAL VIEW ......................................................... 18
DISASSEMBLY PROCEDURES/分解手順 ......... 19~21
SELF DIAGNOSIS FUNCTION (DIAG)/
自己診断機能（ダイアグ）..................................... 22~42
AMP ADJUSTMENT/アンプ部調整 ........................... 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
AV RECEIVER/AV AMPLIFIER
RX-V550/HTR-5750
RX-V450/HTR-5740/DSP-AX450
RX-V550/HTR-5750
RX-V450/HTR-5740/DSP-AX450

Yamaha RX-V550 Specifications

General

Brand	Yamaha
Model	RX-V550
Category	Receiver
Language	English

Summary

To Service Personnel

Critical Components Information

Leakage Current Measurement

Procedure for verifying insulation and measuring leakage current on exposed surfaces.

Front Panel Layouts

Rear Panel Layouts

Technical Specifications

Audio Section Specifications

Details on audio output power, damping factor, sensitivity, frequency response.

General Specifications

Disassembly Procedures

Top Cover Removal

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

Front Panel Unit Removal

Instructions for removing the front panel unit.

Plate Side Removal

Procedure for removing the side plate.

Sub Chassis Unit Removal

Steps to remove the sub-chassis unit.

DSP P.C.B. Removal

Instructions for removing the DSP P.C.B.

FUNCTION P.C.B.s and Tuner Removal

Procedure for removing FUNCTION P.C.B.s and the tuner.

MAIN and POWER P.C.B.s Removal

Steps to remove MAIN and POWER P.C.B.s.

Self Diagnosis Function (DIAG)

DIAG Menu Overview

List of DIAG menu items, sub-menus, and their functions.

Starting and Canceling DIAG

Instructions on how to start, operate, and cancel the DIAG function.

DIAG Display Information

Details displayed when DIAG starts, including protection history.

4. PRO LOGIC Functions

Neo:6 Function

5. SPEAKERS SET Function

Automatic input identification and speaker setting.

6. EXTERNAL INPUT Function

8. DISPLAY CHECK Function

Checks FL display condition, segments, and dimmer.

9. MANUAL TEST Function

Noise generator for channel testing.

10. FACTORY PRESET Function

Reserves and inhibits back-up RAM initialization.

11. AD DATA CHECK Function

Displays A/D conversion values for panel keys and protection.

13. IF STATUS (Input function status)

Displays status data of the microprocessor and input signals.

14. DSP RAM CHECK

Self-diagnosis for YSS930 and external RAM bus connection.

16. SOFT SW

Switches function settings on P.C.B. via software.

17. MICROPROCESSOR INFORMATION

Amp Adjustment

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

Procedure to confirm idling current of MAIN (1) P.C.B. by measuring voltages.

IC Data

IC5: YSS948 (DSP P.C.B.)

Pin diagram and functions for IC5, YSS948.

DSP (Main Decoder)

Role of the DSP as the main decoder.

IC7: YSS930-SZ (DSP P.C.B.)

Pin diagram and functions for IC7, YSS930.

Schematic Diagrams

SCHEMATIC DIAGRAM (DSP)

Detailed circuit diagrams for the DSP section.

SCHEMATIC DIAGRAM (FUNCTION 1/2) RX-V550

Detailed circuit diagrams for FUNCTION 1/2 of RX-V550.

SCHEMATIC DIAGRAM (FUNCTION 2/2) RX-V550

Detailed circuit diagrams for FUNCTION 2/2 of RX-V550.

SCHEMATIC DIAGRAM (FUNCTION 1/2) HTR-5750

SCHEMATIC DIAGRAM (FUNCTION 2/2)

SCHEMATIC DIAGRAM (OPERATION) RX-V550

SCHEMATIC DIAGRAM (OPERATION)

SCHEMATIC DIAGRAM (MAIN)

SCHEMATIC DIAGRAM (POWER)

SCHEMATIC DIAGRAM (SUBTRANS)

SCHEMATIC DIAGRAM (VIDEO)

Parts List

WARNING

ELECTRICAL PARTS

P.C.B. DSP & P.C.B. FUNCTION

P.C.B. FUNCTION

P.C.B. MAIN

P.C.B. OPERATION

P.C.B. POWER

P.C.B. POWER & P.C.B. SUBTRANS

P.C.B. SUBTRANS & P.C.B. VIDEO

CHIP PARTS

Mechanical Parts

MECHANICAL PARTS RX-V550

MECHANICAL PARTS (FRONT PANEL UNIT & SUB CHASSIS UNIT) RX-V550

MECHANICAL PARTS (AMP UNIT) RX-V550

MECHANICAL PARTS HTR-5750 RX-V450/HTR-5740/DSP-AX450

MECHANICAL PARTS (AMP UNIT) HTR-5750 RX-V450/HTR-5740/DSP-AX450