Giáo trình sửa chữa màn hình LCD - Chương6

LCD Monitor Service Guide
for
L2 (Module) Repair


Model: PW191


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 2006.09.06 First Release



3
Index

I.

PW191 LCD Monitor Overview.................................................................1

II.

Product Specification ................................................................................2

III.

MMI...........................................................................................................3

Front side..................................................................................................3

Back side..................................................................................................4

IV.

Menu & Operating Mode...........................................................................5

V.

Disassembly & Assembly..........................................................................6

1.

Precaution .........................................................................................6

2.

Suggest Tools....................................................................................7

3.

Disassembly Procedure.....................................................................8

3.1 Stand Subsystem.........................................................................9

3.2 Board Subsystem ......................................................................15

3.3 Panel Subsystem.......................................................................24

4.

Assemble Procedure .......................................................................27

4.1 Panel Subsystem.......................................................................28

4.2 Board Subsystem ......................................................................30

4.3 Stand Subsystem.......................................................................38

VI.

HW Block Diagram .................................................................................44

I. PW191 LCD Monitor Overview
PW191 is the first 19” wide screen LCD monitor with anti-reflection glare panel
providing more vivid color to entertain your eyes. Main product features include

z 19“ Wide Screen (Aspect Ratio 16:10)
z High Resolution: 1400*900 (WXGA+)
z Anti-Reflection Glare Type Panel (Color Shine)
z SPLENDID™ Video Intelligence Technology
z 5 Video Preset Mode Selections via a Hotkey
z Pivot / Height Adjustment / Tilt / Swivel
z Aluminum Base
z Touch Sensor Buttons
z Built-in Stereo Speakers
z VESA Wall Mounting Compliance







2
II. Product Specification
Technical Specification
Panel Size
19" Wide (16:10)
Anti-Reflection Glare
Yes
Resoponse Time
8ms
Brightness (Max.)
330cd/m2
Contrast Ratio (Max.)
600:1

Viewing Angle (H/V)
150/130
Max. Resolution
WXGA+ 1440*900
Pixel Pitch
0.285mm
Display Color
16.2M
Panel
ZBD
Yes
Spendid (Video Intelligence)
Yes
Digital
24-Pin DVI-D
Analog
15-Pin D-Sub
Inputs
PC Audio Line-in
3.5mm mini jack
Earphone
Yes
Output
Speaker
2W x 2 Stereo
Tile
+90~-5
Height Adjustment
Yes(double hinge)
Pivot

Yes (0/90)
Swivle
+60~-60
Wall Mounting (VESA)
Yes(100mm)
ME
Color
Shining Black+Silver
Security Kensington lock
Yes
Power Supply
AC: 100~240V
Power on mode
<48W
Power
Standy by mode
<2W
Net (WxHxD)
520x490x280 mm
Dimension
Packing (WxHxD)
619x443x207 mm
Net
8.5kg
Weight
Gross
10.8kg
Accessory
DVI cable, D-sub cable, Audio cable,
AC Adapter, Power cord, Quick Start

Guide, Support CD (User Manual, Pivot
Pro)
Regulation Approval
Energy Star, UL/cUL, CB, CE, FCC,
CCC, BSMI, Gost-R, C-Tick, VCCI,
RoHS, MIC, WEEE




3
III. MMI
Front side






4
Back side






5
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/DVI> (1) Volume
(2) OSD Setup
(3) Language
(4) Information
(5) Reset


Supported Operating Mode

6
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.





7
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



8
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 PW191 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




9
3.1 Stand Subsystem

1. Turn the VESA COVER counterclockwise to open it. Remove the VESA
cover from STAND.












10
2. Remove 4 screws on the BACK COVER, and then Stand Subsystem can

be separated from main unit.





3. Dismount NECK FRONT COVER.




1 3
2 4



11
4. Lift 8 latches of HINGE FRONT COVER to remove from HINGE, two on the
top, three on the left and the other three on the right side.




5. Remove 2 screws on the front of hinge head

12
6. Remove 4 screws, and remove NECK REAR COVER.





7. Remove 3 screws on the front side of HINGE.







13
8. Follow the steps. Press down the hinge first, then lift the bottom of HINGE
REAR COVER, and remove HINGE REAR COVER slightly.



9. Remove 1 screw in the bottom to dismount BASE SWIVAL.





1
3

2



14
10. Remove 8 screws on BASE COVER and BASE BRACKET can be
removed.









15
3.2 Board Subsystem

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





2. Open 2 latches at bottom of BACK COVER .

16
3. Lift and remove BACK COVER.


Main Board Shielding
1. Remove 8 screws on MAIN BOARD SHIELDING.




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6
5
4
3
2
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