Giáo trình sửa chữa màn hình LCD - Chương8

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



2
Release Version List
Version Issue Date Remarks
V1.0 2006.09.05 First Release



3
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

2
II. Product Specification


D-SUB DVI Audio Glass
VW192T
Y Y Y
VW192S
Y Y
VW192D
Y

VW192G
Y Y

Technical Specification
Panel Size
19" Wide (16:10)
Response Time
5ms
Protection Glass
Yes (For VW192G only)
Brightness (Max.)
330cd/m2
Contrast Ratio (Max.)
700:1
Viewing Angle (H/V)
160/160
Max. Resolution
WXGA+ 1440*900
Pixel Pitch
0.285mm
Panel
Display Color
16.2M
Splendid (Video Intelligence)
Yes
Analog
15-Pin D-Sub
Inputs
PC Audio Line-in
3.5mm mini jack

Output
Speaker
1W x 2 Stereo
Tile
+20~-5
Wall Mounting (VESA)
Yes(100mm)
ME
Color
Black
Security Kensington lock
Yes
Power Supply
AC: 100~240V
Power on mode
<46W
Power
Standy by mode
<2W
Net (WxHxD)
458x368x207 mm
Dimension
Packing (WxHxD)
500x424x152 mm
Net
4.3kg
Weight
Gross
5.8kg
Accessory

D-sub cable, Audio cable, Power cord,
Quick Start Guide
Regulation Approval
TCO03, VCCI, Energy Star 2006,
UL/cUL, CB, CE, FCC, CCC, BSMI,
Gost-R, C-Tick, PSB, MIC, WHQL




3
III. MMI
Front side





1. SPLENDID Button:
z Use this hotkey to switch from five video preset modes (Game Mode,
Night View Mode, Scenery Mode, Standard Mode, and Theater Mode)
with SPLENDID™ Video Enhancement Technology.
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
phase by pressing this button for 2-4 seconds.
2. ◄−Button:
z Press this button to decrease the value of the function selected or move
to the previous function.
z This is also a hotkey for Volume adjustment.

3. MENU Button:
z Press this button to enter/select the icon (function) highlighted while the
OSD is activated.






4
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.
5. Power button
z Press this sensor to turn the monitor on/off
6. Power indicator
z The color definition of the power indicator is as the below table.

LED Status Description
Blue Power ON
Amber Standby mode
OFF Power OFF






5

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



6
IV. Menu & Operating Mode
Menu
Splendid Image Color
(1) Scenery Mode
(2) Standard Mode
(3) Theater Mode
(4) Game Mode
(5) Night View Mode

(1) Brightness

(2) Contrast
(3) Sharpness
(4) Saturation
(5) Position (For VGA only)
(6) Focus (For VGA only)

(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
DOS

720×400 31.47KHz 70Hz 28.32MHz
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
XGA
1024×768 60.02KHz 75Hz 78.75MHz
1280×1024 64.00KHz 60Hz 108.00MHz
SXGA
1280×1024 80.00KHz 75Hz 135.00MHz
VESA
1152×864 67.50KHz 75Hz 108.00MHz
VESA
(Primary)
1440×900 55.90KHz 60Hz 106.00MHz

＊
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.

7
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.





8
2. Suggest Tools
Here are some tools that can be used for the LCD monitor’s service and repair.

Philips-head Screwdriver

Use a Philips-head screwdriver to fasten/remove the K- or B-typed screws

P/N：N/A

Gloves

To protect LCD Panel and your hand

P/N: (L) 16-003300131 (M) 16-003300130

C/D Disassembly Tool

Use C/D Disassembly Tool to open cosmetic cover and avoid scratch.

P/N: 13GV0400PZZZZ

Spacer Screwdriver
Use a spacer screwdriver to fasten/remove spacer screws or hex screws.


P/N: N/A



9
3. Disassembly Procedure
Information in this section is to perform the disassembly procedure of the LCD
monitor. Depending on the failures, replace the defective parts accordingly.

Asus VW192 Series LCD Monitor consists of various subsystems. This section

describes the procedures for LCD monitor disassembly. In addition, the
detailed disassembly procedures of individual subsystem will be provided for
your service needs.

The disassembly procedure consists of the following steps:

3.1 Stand Subsystem
3.2 Board subsystem
3.3 Panel subsystem




10
3.1 Stand Subsystem

1. Turn the screw counterclockwise to remove it.




2. Unlock the clips to dismount BASE.

11
3.2 Board Subsystem

Back Cover
1. Release 2 screws on the HINGE COVER.




2. Push up to dismount HINGE COVER.