Giáo trình sửa chữa màn hình LCD - Chương8

Giáo trình sửa chữa màn hình LCD

LCD Monitor Service Guide

for

L2 (Module) Repair

Model: VW192 Series

V1.0

RESTRICTIONS ON USE OF MATERIALS

This manual is only for ASUS authorized service centers to repair ASUS LCD product The documents are provided as is and no copy, reproduction

or transfer shall be made without first acquiring prior written approval from ASUSTEK All rights reserved

Release Version List

Index

I VW192 Series LCD Monitor Overview 1

II Product Specification 2

III MMI 3

Front side 3

Back side 5

IV Menu & Operating Mode 6

V Disassembly & Assembly 7

1 Precaution 7

2 Suggest Tools 8

3 Disassembly Procedure 9

3.1 Stand Subsystem 10

3.2 Board Subsystem 11

3.3 Panel Subsystem 19

4 Assemble Procedure 21

4.1 Panel Subsystem 22

4.2 Board Subsystem 24

4.3 Stand Subsystem 32

VI HW Block Diagram 33

I VW192 Series LCD Monitor Overview

Main product features include

z 19” Screen 1440 *900

z 5ms Response Time (Tr+Tf)

with 300nits/700:1 Contrast Ratio

z 160/160 degree Wide Viewing Angle

z SPLENDIDTM Video Intelligence Technology

z Protection glass (For VW192G only)

z Dual Video Input (For VW192T only)

z 5 Video Preset Modes (Hotkey)

z 3 Skin-tone selections

z Built-in Stereo Speakers (For VW192S/Tonly)

z VESA Wall Mounting

II Product Specification

Splendid (Video Intelligence) Yes

Analog 15-Pin D-Sub

Inputs

PC Audio Line-in 3.5mm mini jack

Wall Mounting (VESA) Yes(100mm)

ME

Power Supply AC: 100~240V

Quick Start Guide

Regulation Approval

TCO03, VCCI, Energy Star 2006, UL/cUL, CB, CE, FCC, CCC, BSMI, Gost-R, C-Tick, PSB, MIC, WHQL

z Exit the OSD menu or go back to the previous menu as the OSD menu

is active

z Automatically adjust the image to its optimized position, clock, and

4 −► Button:

z Press this button to increase the value of the function selected or move

to the next function

z This is also a hotkey for Brightness adjustment

Back side

Rear connectors (form let to right)

1 PWR port This port connects the power connector from the bundled

power cord

2 DVI port This 24-pin port is for PC (Personal Computer) DVI-D digital

signal connection (Only for some models)

3 VGA port This 15-pin port is for PC VGA connection

4 Audio-in port This port connects PC audio source by the bundled audio

cable (Only for some models)

Rear Connectors

IV Menu & Operating Mode

(1) Color Temp (2)Skin Tone

Input Select System Setup

(1) <VGA> (1) Volume

(2) OSD Setup (3) Language (4) Information (5) Reset

Supported Operating Mode

Standard Resolution Horizontal

Frequency

Vertical Frequency

Pixel Frequency

640×480 31.47KHz 60Hz 25.18MHz 640×480 37.90KHz 72Hz 31.50MHz

VGA

640×480 37.50KHz 75Hz 31.50MHz 800×600 35.16KHz 56Hz 36.00MHz 800×600 37.90KHz 60Hz 40.00MHz 800×600 48.10KHz 72Hz 50.00MHz

SVGA

800×600 46.90KHz 75Hz 49.50MHz 1024×768 48.40KHz 60Hz 65.00MHz 1024×768 56.50KHz 70Hz 75.00MHz

Modes not listed in the table may not be supported For optimal resolution,

we recommend that you choose a mode listed in the table above

V Disassembly & Assembly

1 Precaution

Please read the precautions as follows to prevent any damages to the LCD Monitor and also select the appropriate tools for disassembly and re-assembly

‹ Make sure all power connection is removed Be sure that the LCD Monitor

is in power off status

‹ Prepare soft cloth and sponge as working platform to place LCD monitor horizontally

‹ Hold LCD by the side carefully and DON’T touch or press panel directly

‹ Remove all rings, watches and any other metal objects from your hands which possible to cause scratch

‹ Always wear a ground strap or anti-static glove to protect the parts from static discharge ESD (electro-static discharge) protection is required to guarantee the safety of product and personnel

3.1 Stand Subsystem

1 Turn the screw counterclockwise to remove it

2 Unlock the clips to dismount BASE

3 Remove 4 screws on the BACK COVER

2 Release 2 screws on KEY BOARD

5 Disconnect SPEAKER CABLE

2 Release 4 screws on SPEAKERS

Main Board and Power Board

1 Remove POWER BOARD MYLAR

4 Dismount Left and right BRACKETS

The assembly procedure consists of the following steps:

4.1 Panel Subsystem

4.2 Board subsystem

4.3 Stand subsystem

4.1 Panel Subsystem

1 Following the steps, take out LAMP CABLE form the hole of LCD left

BRACKET, and then assemble left BRACKET and LCD PANEL

2 Assemble right BRACKET and LCD panel

3 Tighten 4 screws on both sides

1

3

4 Locate LCD in BEZEL and press down to fix it

5 Secure 6 screws on LCD PANEL

4 Tighten 4 screws on POWER BOARD and 2 Screws on MAIN BOARD

4 Connect KEY BOARD CABLE with MAIN BOARD

4 Tighten 2 screws on HINGE COVER

4.3 Stand Subsystem

1 Mount BASE under STAND

2 Turn the screw clockwise to tighten it

VI HW Block Diagram