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Technics SU-VX720 Service Manual

Technics SU-VX720
19 pages
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Question and Answer IconNeed help?

Do you have a question about the Technics SU-VX720 and is the answer not in the manual?

Technics SU-VX720 Specifications

General IconGeneral
TypeStereo Integrated Amplifier
Input Sensitivity2.5mV (MM), 150mV (line)
Weight12.3kg
Frequency Response5Hz to 50kHz
Speaker load impedance4 ohms to 16 ohms
Signal to noise ratio86dB (MM)
Total Harmonic Distortion0.02%
Signal-to-Noise Ratio86dB (MM)
Dimensions430 x 150 x 360mm

Summary

Service Manual Overview

Technical Specifications

Detailed technical specifications according to DIN 45 500 standards.

Front Panel Controls and Indicators

Primary Controls

Details on core operational controls like power, volume, input, and speaker selectors.

Special Function Switches

Explanation of switches for tone, loudness, subsonic filter, mode, and source direct.

Component Connections

Connecting Audio Sources

Guides for connecting tuners, CD players, tape decks, and AUX devices.

Turntable and Remote Control Connections

Instructions for connecting turntables, grounding, and remote control systems.

Setting the Power Voltage

Procedure for setting the correct power voltage for the region of use.

Speaker and Power Connections

Speaker Connection Types and Impedance

Guidance on connecting main, second, and bi-wired speakers with impedance requirements.

Disassembly and Servicing Safety

Servicing Safety Precautions

Important safety warnings for technicians performing disassembly and repairs.

Printed Circuit Board (PCB) Removal Procedures

Component Removal and Replacement

Schematic Diagrams - Core Circuits

Schematic Diagrams - Supporting Circuits

Schematic Diagrams - Functional Circuits

Amplifier, Volume, and Tone Circuit Schematics

Schematics detailing amplifier, volume control, and tone control stages.

Schematic Diagrams - Power and Control

Printed Circuit Board Layouts - Input and Main

Printed Circuit Board Layouts - Control and Sensor

Printed Circuit Board Layouts - Power and Control

Power Source, AC/Volt Adj., and Power Switch PCB Layouts

Layouts for Power Source, AC/Volt Adj., and Power Switch PCBs.

Wiring Connection Diagram

Measurements and Adjustments

Adjustment Procedures and Points

Guidance on performing voltage control adjustment and identifying adjustment points.

IC Terminal Functions and Block Diagram

Block Diagram - Signal Flow

Overall block diagram showing signal paths from inputs to outputs.

Block Diagram - Power and Control Systems

Block diagram illustrating power supply, control, and protection systems.

Replacement Parts List - Components

Cabinet, IC, Transistor, and Resistor Parts

List of replacement parts for cabinet, integrated circuits, transistors, and resistors.

Replacement Parts List - Detailed Values

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