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LG Flatron M198WA Service Manual

LG Flatron M198WA
55 pages
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COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : LP69G
MODEL: M198WA (M198WA-BZH.A**QLP)
*( ) **Same model for Service

Table of Contents

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LG Flatron M198WA Specifications

General IconGeneral
Screen Size19 inches
Resolution1440 x 900
Aspect Ratio16:10
Panel TypeTN
Brightness250 cd/m²
Contrast Ratio1000:1
Dynamic Contrast Ratio5000:1
Response Time5 ms
Viewing Angle (Horizontal)170°
Viewing Angle (Vertical)160°
Input PortsD-Sub, DVI-D
Input ConnectorsD-Sub, DVI-D

Summary

Safety Precautions

Safety-Related Components

Identifies critical components essential for safety in LCD monitors.

LCD Module Handling Precautions

Guidelines for safely handling the LCD module to prevent damage or injury.

Electric Shock Hazards

Warnings and procedures related to high voltage and electric shock risks.

Leakage Current Check Circuit

Provides a circuit diagram for testing leakage current.

Servicing Precautions

General Servicing Guidelines

General recommendations and precautions to follow during service operations.

Handling Electrostatically Sensitive Devices

Techniques to prevent damage to sensitive electronic components from static discharge.

Component Repair Procedures

Soldering and Desoldering Guidelines

Best practices for soldering and unsoldering components on circuit boards.

Component Replacement Methods

Step-by-step instructions for replacing ICs, transistors, diodes, fuses, and resistors.

Product Specifications

General Specifications (TV)

Details general specifications related to TV functionality and inputs.

Input and Module Specifications

RGB/DVI and LCD Module Details

Technical specifications for RGB/DVI inputs and the LCD module.

Disassembly Procedure

Base and Cable Management Removal

Steps for removing the monitor stand base and cable management cover.

Unit Disassembly Steps

Body Separation and Cover Removal

Procedures for separating the unit body and removing the back cover.

Adjustment Instructions

Main PCB Check and ADC Process

Steps for checking the main PCB and performing ADC calibration.

Adjustment and Quality Verification

ADC Process Confirmation and Function Check

Verifies ADC adjustments and checks basic display/sound functions.

Assembly Line Quality Checks

Procedures for color coordinate and auto-adjustment verification.

Adjustment Commands and Data Management

Command List and EEPROM Operations

Lists adjustment commands and procedures for reading/writing EEPROM data.

Service OSD and Connections

Troubleshooting Guide

No Power / LED Indicator Off

Diagnostic steps for resolving power-on issues where the LED is off.

Raster Troubleshooting

No Raster / [B] Process

Troubleshooting steps for issues where no raster is displayed on the screen.

RGB Signal Raster Issues

Component Signal Raster Issues

Signal Raster Troubleshooting

Audio Troubleshooting

No Sound Issues

Diagnostic steps for resolving problems when no audio is produced.

Replacement Parts Catalog

Schematic Diagram - MSTAR

MSTAR Processor Connections

Detailed schematic illustrating the connections and pins of the MSTAR processor.

Schematic Diagram - Panel & Connectors

Schematic Diagram - DDR Memory

Schematic Diagram - Audio Amplifier

Schematic Diagram - Tuner

Schematic Diagram - D-SUB & DVI

Schematic Diagram - SCART & DAC

Schematic Diagram - Audio/Video Jacks

Schematic Diagram - Power Supply

Standby and General Voltage Circuits

Schematics for the standby and general voltage regulation circuits.

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