JVC AV-27F476 User Manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA243
2005/2
COLOR TELEVISION
YA24320052
AV-27F476/R, AV-27F476/S,
AV-32F476
/Y, AV-32F476/Z
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
BASIC CHASSIS
GJ5

JVC AV-27F476 Specifications

General

Screen Size	27 inches
Display Type	CRT
Aspect Ratio	4:3
Remote Control	Yes
Inputs	Composite, S-Video
Comb Filter	3D
Dimensions (W x H x D)	21.5 inches

Summary

SECTION 1 PRECAUTION

1.1 SAFETY PRECAUTIONS

General safety guidelines for servicing the product, covering electrical hazards and proper component handling.

SECTION 2 SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

Highlights key features of the JVC television models.

2.2 MAIN DIFFERENCE LIST

Lists main component differences between AV-27F476 and AV-32F476 models.

2.3 HOW TO IDENTIFY MODELS

Guides on how to recognize and distinguish between different TV models.

SECTION 2.4 TECHNICAL INFORMATION

2.4.1 MAIN MI-COM (CPU) PIN FUNCTION

Details the pin assignments and functions for the main MI-COM (CPU).

SECTION 3 DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

Step-by-step instructions for safely disassembling the television unit.

3.2 MEMORY IC REPLACEMENT

3.2.1 MEMORY IC REPLACEMENT PROCEDURE

Outlines the process for replacing the memory IC in the unit.

3.2.2 SERVICE MODE SETTING ITEMS

Lists adjustable items and their settings within the service mode.

SECTION 4 ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

Necessary preparations before performing TV adjustments.

4.2 PRESET SETTING BEFORE ADJUSTMENTS

Presets for various functions before starting adjustments.

4.3 MEASURING INSTRUMENT AND FIXTURES

Lists required measuring instruments and fixtures for adjustments.

4.4 ADJUSTMENT ITEMS

Specific items that require adjustment during service.

4.5 ADJUSTMENT LOCATIONS

Identifies specific locations for adjustment points on the circuit boards.

4.6 BASIC OPERATION OF SERVICE MODE

Guides on operating the service mode and its functions.

4.7 INITIAL SETTING VALUE OF SERVICE MODE

Details the initial factory setting values for various adjustment parameters.

4.8 ADJUSTMENT PROCEDURE

Step-by-step procedures for performing various TV adjustments.

SECTION 5 TROUBLESHOOTING