JVC HX-D77UJ User Manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited
No.MB556
2006/8
COMPACT COMPONENT SYSTEM
MB55620068
HX-D77UJ
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
CA-HXD77 SP-HXD77
SP-HXD77

JVC HX-D77UJ Specifications

General

Speakers	2-way bass reflex
Signal-to-Noise Ratio	70 dB
CD Player	Yes
Cassette Deck	Yes
Tuner Bands	FM

Summary

PRECAUTION

Safety Precautions

General safety guidelines and warnings for handling the product and performing service.

Warning

Important warnings regarding equipment design, manufacturing, and compliance with safety standards.

Caution

Notes about potential hazards like burrs on chassis parts during repair.

Critical parts for safety

Identification of safety-critical components and the importance of using approved replacement parts.

Important for laser products

Specific safety precautions and warnings related to the product's laser system.

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY

Main body

Overview of the main unit and its disassembly process.

Removing the top cabinet

Step-by-step instructions for safely removing the top cabinet from the main unit.

Removing the fan

Procedure for detaching and removing the cooling fan from the main body.

Removing the AMP board

Detailed steps for disconnecting and removing the Amplifier (AMP) board.

Removing the SMPS board

Instructions for safely removing the Switched-Mode Power Supply (SMPS) board.

Removing the 5DVD mechanism assembly

Procedure for detaching the 5-disc DVD mechanism assembly from the main unit.

Removing the front cabinet assembly

Steps involved in removing the front cabinet assembly, including screws and hooks.

Removing the front VFD board

Instructions for removing the front Vacuum Fluorescent Display (VFD) board.

Removing the front key board

Procedure for detaching the front keyboard assembly, including knobs and claws.

Removing the phone board

Steps for removing the phone board from the front cabinet assembly.

Removing the jog LED board, volume LED board and USB LED board

Instructions for removing the LED boards (Jog, Volume, USB) from the front key board.

ADJUSTMENT

TROUBLESHOOTING

SCHEMATIC DIAGRAMS

Block diagram

High-level overview of the system's functional blocks and their interconnections.

Standard schematic diagrams

Detailed circuit diagrams for various sections like amplifier, front, SMPS, and DVD.

Printed circuit boards

Visual layout diagrams of the main printed circuit boards (PCBs) and their components.

PARTS LIST

Exploded view of general assembly and parts list

Visual representation of the product's assembly with numbered parts and their corresponding list.

DVD mechanism assembly and parts list

Detailed parts breakdown and diagrams for the DVD mechanism assembly.

DVD changer assembly and parts list

Specific parts list and exploded views for the DVD changer mechanism assembly.

Electrical parts list

Comprehensive list of electrical components (resistors, capacitors, ICs, transistors) with part numbers.

Packing materials and accessories parts list

List of included accessories, packing materials, and their associated part numbers.