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JVC TH-A25 Service Manual

JVC TH-A25
71 pages
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2-4
SHEET 1
To UW3
(SHEET 2)
To PCN1
(SHEET 4)

Table of Contents

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JVC TH-A25 Specifications

General IconGeneral
BrandJVC
ModelTH-A25
CategoryHome Theater System
LanguageEnglish

Summary

Safety Precautions

General Safety Guidelines

General safety guidelines for product design and service.

Warnings, Cautions, and Critical Parts

Critical safety notices, including warnings and attention to safety parts.

Static Electricity Prevention

Procedures to prevent ESD damage during repair work.

Safety Administration Points

Details on safety-related component administration and fuse types.

Specifications

System Specifications

Detailed technical specifications for the TH-A25 system.

Service Instructions and Disassembly

Specific Service Instructions

Manual states this section contains no specific service instructions.

Main Unit Disassembly

Step-by-step guide to disassembling the main unit.

Removing Top Cover and Tray Door

Instructions for detaching the top cover and DVD tray door.

Removing Internal Components and Boards

Steps to detach DVD mechanism, front panel, tuner, fan, rear, video, function, main boards, power trans.

Front Panel Assembly Disassembly

Disassembly procedures for the front panel assembly.

Removing Front and Power Boards

Instructions for detaching the front display board and power switch board.

Adjustment and Troubleshooting

Adjustment Procedures

Manual states this section contains no adjustment procedures.

Power and Output Issues

Flowcharts for diagnosing and resolving power and audio output problems.

Protection and Servo System Issues

Troubleshooting for protection circuits, initial operation, playback, and servo errors.

Pickup Head, Disc Detection, and MPEG Issues

Diagnosing pickup head, disc detection, and MPEG decoding problems.

Specific Component Troubleshooting

Diagnosing disc motor, focus, tracking, and CLV servo failures.

Schematic Diagrams

Block Diagram

High-level overview of system architecture and component connections.

Detailed Schematics

Circuit diagrams for various system sections.

Printed Circuit Board Layouts

Visual representations of component placement on PCBs.

Parts List

Exploded View and General Assembly Parts

Visual and list-based identification of unit components.

Electrical Components List

Detailed list of electronic parts with part numbers and descriptions.

Packing and Accessories

List of packaging materials and included accessories.

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