ASUS VW223 Service manual

Service Manual

ASUS VW223

RESTRICTIONS ON USE OF MATERIALS

:

LCD Monitor Service Manual

Model: ASUS VW223

V 1.0

1

Service Manual ASUS VW223

Index

Description Page

Revision List.…........................................……........................................................................ 3

Important Safety Notice.……..................……..........................................................................4

1. Monitor Specification..............................………..............................................6

2. Operation Instruction…………...............……...................................................................... 7

2.1.General Instructions...........................…..................................……….................................... 7

2.2.Control Button…………….…..............……......................................................………............ 7

3. Input/Output Specification............……………..................................................................... 9

3.1.Input Signal Connector............…………..............................................................……….........9

3.2. Factory Preset Display Modes.............................................................................…….......... 9

3.3.Panel Specification…….......................................... ………….............................………....... 11

4. Block Diagram…..….....................…………......................................................................……18

5. Schematic Diagram……………………....…........................................................................ 19

5.1.Main Board……….................................................................................................……........ 19

5.2.Power Board...……....................................................................................................……. 26

5.3. Key Board.............................................................................………………….............29

6. PCB Layout..…………........................................................................................................ 29

6.1.Main Board………........................................................................................................30

6.2.Power Board…............................................................................................................33

6.3.Key Board…………….................................... .........................................................…………39

7. Disassemble & Assemble SOP..……………….. ............................................................... 40

7.1 Procaution……….................................. ....................................................................40

7.2 Suggest Tools…………………………........... .................................…............................…...40

7.3 Disassembly Procedure…………………………............................................................41

7.4 Assemble Procedure…………………………………………………………………………48

8. Maintainability……………………………………………………………………………………55

8.1 Equipments and Tools Requirement…………………………………………………….55

8.2 Trouble Shooting………………………......... ....................................................................55

9. Color/White balance Adjustment…………….................................................................... 61

10. Exploded View…..……………………..... ....................................................................63

11. BOM list……………………………………......................................................................... 64

12. Different parts list……………………………........................................................................ 101

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Service Manual ASUS VW223

Revision List

Version Date Revision History Customer Model

VW223T

A00 Aug-20-2008 Initial release

VW223B

TPV Model Name

TC8MRGNTWAUSAZ

TC8MRGNTWAUSAZND

TC8MRGNDWAUAAZ

TC8MRGNKWAUSANN
TC8MRGNBWAUS8NN
TC8MRGNBWAUSANN
TC8MRGNCWAUSDZN

TC8MRGNKWAUSAN2
TC8MRLNDWAUSAZN
TC8MRLDBWAUSNNN

TC8MRLNTWAUBAZ

TC8MRLDCWAUANNN

VW223S

VW223N

VW223D

A01 Oct-10-2008 Update BOM and add

different parts list

Add audio diagram

update BOM List

A02 Dec-05-2008 Add

VW223D-CN TC8MRLDDWAUANZN

TC8MRLDKWAUANNN

TC8MRGNTWAUAAZ2

TC8MRGNTWAUAAZ

TC8MRGNTWAUAAZND

TC8MRGNBWAUANNN
TC8MRGNBWAUANNN

TC8MRGNBWAUSA

TC8MRGNBWAUAANN

TC8MRGNTWAUANZ

TC8MRGNBWAUAAN2

VW223S-CN TC8MRLDDWAUAAZN

3

Service Manual ASUS VW223

Important Safety Notice

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics might create
shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit

-Must mount the module using mounting holes arranged in four corners.

-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.

-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

-Make certain that treatment person’s body is grounded through wristband.

-Do not leave the module in high temperature and in areas of high humidity for a long time.

-Avoid contact with water as it may a short circuit within the module.

-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

damage the panel.)

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Service Manual

ASUS VW223

1. Monitor Specification

Item Specification Unit

Active Area 473.76 (H) x 296.1 (V) (22” wide diagonal) mm
Driver Element a-si TFT Active Matrix ­Pixel Number 1680 x R.G.B. x 1050 pixel
Pixel Pitch 0.282 (H) x 0.282 (V) mm
Pixel Arrangement RGB Vertical Stripe -

LCD panel

Graphic

Performance

Power source

Power consumption

Tilt angle Upward / Downward +25° / -5° degree

Physical

Function

Display Color 16.7 M color
Transmissive Mode Normally White ­Viewing Angle (H / V) Typical 170 / 160 degree
Brightness Typical (300) cd/m

Contrast Ratio Typical (1000) ­LC Response Time (Tr+Tf) 5 (Tr: 1.3 + Tf: 3.7) msec
Separate Sync. TTL Level ­Horizontal Sync. Positive / Negative ­Vertical Sync. Positive / Negative ­Input Connector D-SUB/ DVI(optional)/ USB(optional) ­Auto Adjust Clock, Phase, H Position & V Position ­Screen Scaling VGA/SVGA/XGA/SXGA/WXGA+/WSXGA+ Full Screen
Power Management VESA DPMS, DVI DMPM Compliance ­Color Adjustment User, 6500K, 7500K & 9300K ­OSD Language English, German, Italian, French, Dutch, Spanish,

Russian, Traditional Chinese, Simplified Chinese,

Japanese

Power Input AC100~240 (Worldwide) V
Input frequency 50 ~ 60 Hz
Input Current 1600(max) mA
Efficiency AC input 100VAC 80% (min)
Operation Mode 50W
Power Saving Sleep Mode < 1.5W W
Power Saving OFF Mode < 1W W

Dimension, weight 511.56 x 402.95 x 210 (W x H x T),

4.85 / 4.924 (VW223B)

DDC Plug & Play
Keypad

Audio Amplifier Output
Speaker Rating

1.0W/ch (max) @ 1Vrms, 1kHz sine wav -

DDC 2B/CI Compliance -

8 ohms, 1 W/ch(max.)

W

max

6keys -

2

-

-

mm, kg

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Service Manual ASUS VW223

Electrical Specifications

Item Description

Input System RGB Separate

Graphic Signal

Signal Level Analog RGB (0.7V
Input Impedance

Analog RGB =75Ω / Digital (DVI)=100Ω

Signal Level Analog RGB Separate Sync: TTL
Compliant Timing See Appendix 1.

) / Digital (DVI) / USB 2.0

P-P

Input Connector 15 pins mini D-Sub, DVI 24pins, USB B-type and A-type 4pins
Video Frequency
Bandwidth

Analog RGB 165MHz dot clock
Digital 165 MHz dot clock

480 Mbps Hi-Speed Mode

Signal Level 1Vrms
Input Impedance

47kΩ Audio Signal

Input Connector d=3.5 mm Mini-jack

Synchronization Frequency

Horizontal Sync. 30~ 82kHz
Vertical Sync. 56 ~ 76Hz
Input Voltage AC 100~240V (Worldwide)
Frequency 50 / 60Hz

Power Supply

Power Consumption 55W

max

/ 65W

(for VW 223B)

max

Power Management 2W (max)
Lamp Type Cold Cathode Fluorescent Lamp

Backlight

Lamp Quantity 4 pcs

Lamp Life Time 50,000 Hrs (IL = 7.0mA) (min)
DDC Plug & Play VESA DDC 2B/CI Compliance
Power Management VESA DPMS, DVI DMPM Compliance

Power Management Status Power Consumption Screen Recovery Time

Stand-by
Suspend

< 1.5W @240VAC 50Hz

Within 5 sec

Active-off

< 1W @240VAC 50Hz

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Service Manual ASUS VW223

2. Operation Instructions

2.1 General Instructions

Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor
(See Figure ). By changing these settings, the picture can be adjusted to your personal preferences.
* The power cord should be connected.
* Press the power button to turn on the monitor. The power indicator will light up.

2.2 Control Button

2.2.1 External Controls

Front:

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