JVC LT-42Z49/AT User Manual

SERVICE MANUAL
COPYRIGHT © 2009 Victor Company of Japan, Limited
No.YA708<Rev.002>
2009/8
LCD COLOUR TELEVISION
YA708<Rev.002>20098SERVICE MANUAL
LT-42Z49/AT, LT-42Z49/BAT,
LT-42Z49
/EAT, LT-42Z49/MAT,
LT-42Z49
/NASK, LT-42Z49/RACK,
LT-42Z49
/SAT, LT-42Z49/VAT
COPYRIGHT © 2009 Victor Company of Japan, Limited
<FU3 CHASSIS LINEUP>
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
No.YA702
: LT-32EX19 No.YA703: LT-32BX19
No.YA704
: LT-42EX19 No.YA708: LT-42Z49
BASIC CHASSIS
FU3

JVC LT-42Z49/AT Specifications

General

Screen Size	42 inches
Display Type	LCD
Aspect Ratio	16:9
HDMI Ports	3
USB Ports	1
Brightness	500 cd/m²
Viewing Angle	178°
VGA Port	1
Component Video Input	1
Composite Video Input	1
RF Input	1
Resolution	1920 x 1080 (Full HD)
Standby Power Consumption	1 W

Summary

PRECAUTIONS

Safety and Handling

General safety precautions, installation, and handling guidelines for the unit.

Operating Time Management

Methods for checking and resetting the TV's operating time.

SPECIFIC SERVICE INSTRUCTIONS

Features Overview

Key features of the LCD television.

Model Information

Model difference lists and guides for identifying product variations.

LCD Panel Specifications

Specifications and fault definitions related to the LCD panel.

Main CPU Pin Function

Pinout and function details for the main CPU.

DISASSEMBLY

Disassembly Cautions

Safety warnings and important notes before disassembling the unit.

Main Unit Component Removal

Step-by-step procedures for removing major components from the main unit.

LCD Panel Unit Disassembly

Specific steps for disassembling the LCD panel unit.

Memory IC Replacement

Procedure for replacing memory ICs and related settings.

ADJUSTMENT

Adjustment Preparation

Prerequisites, initial settings, and required equipment for TV adjustments.

Service Mode Operation

Procedures for entering, exiting, and managing settings in service mode.

Adjustment Procedures

Detailed modes and procedures for video circuit and VSM adjustments.

TROUBLESHOOTING

Self-Check Feature Overview

Overview of the self-check feature for diagnosing TV issues.

Self-Check Mode Operation

Procedures for entering, exiting, and managing the self-check mode.

Failure History and Notes

Understanding failure history and important usage notes for self-check.

Self-Check Item Details

Detailed explanation of self-check items and error displays.