ViewSonic VX2255wmb-4, VX2255wmh-4, VS11661 Service Manual

ViewSonic VX2255wmb-4

VX2255wmh-4

Model No. VS11661

22” wide Color TFT LCD Display

(VX2255wmb-4_VX2255wmh-4_SM Rev. 1a Sep. 2007)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

Service Manual

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Copyright

Copyright © 2007 by ViewSonic Corporation. All rights reserved. No part of this publication
may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any
language or computer language, in any form or by any means, electronic, mechanical, magnetic,
optical, chemical, manual or otherwise, without the prior written permission of ViewSonic
Corporation.

Disclaimer

ViewSonic makes no representations or warranties, either expressed or implied, with respect to
the contents hereof and specifically disclaims any warranty of merchantability or fitness for any
particular purpose. Further, ViewSonic reserves the right to revise this publication and to make
changes from time to time in the contents hereof without obligation of ViewSonic to notify any
person of such revision or changes.

Trademarks

Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.

Product disposal at end of product life

The lamp in this product contains mercury. Please dis pose of in accordance with local, state or
federal laws.

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 9/14/2007 Initial Release Jamie Chang

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TABLE OF CONTENTS

1. Precautions and Safety Notices ......................................................................................... 1

2. Specification ....................................................................................................................... 4

3. Front Panel Function Control Description ..................................................................... 23

4. Circuit Description............................................................................................................. 29

5. Adjusting Procedure .......................................................................................................... 31

6. Trouble Shooting Flow Chart ............................................................................................ 44

7. Block Diagrams ................................................................................................................ 53

8. Schematic Diagrams ........................................................................................................ 54

9. PCB Layout Diagrams ...................................................................................................... 61

10. Exploded Diagram And Spare Parts List........................................................................ 65

11. Recommended Spare Parts List .................................................................................... 70

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1. Precautions and Safety Notices

1. SAFETY PRECAUTIONS

This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However,
improper used or installation may cause damage to the monitor as well as to the user.

WARNINGS:

z This m onitor should be operated only at the correct power sources indicated on the label on the rear

of the monitor. If you’re unsure of the power supply in you residence, consult your local dealer or
Power Company.

z Use only the special power adapter that comes with this monitor for power input.
z Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. Only the

qualified technician can repair it.

z Do not remove the monitor cabinet. There are high-voltage parts inside that may cause electric shock

to human bodies.

z Stop using the monitor if the cabinet is damaged. Have it checked by a service technician.
z Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable

immediately and consult your closed dealer .

z Always unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply

non-ammonia based cleaner onto the cloth, not directly onto the glass screen.

z Do not place heavy objects on the monitor or power cord.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety visual inspections and the
protection afforded by them cannot necessarily be obtained by using replacement components rated for
higher voltage, wattage, etc. Before replacing any of these components read the parts list in this manual
carefully. The use of substitute replacement parts, which do not have the same safety characteristics as
specified in the parts list, may create shock, fire, or other hazards.

3. SERVICE NOTES

z When replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
z Keep wires away from high voltage, high temperature components and sharp edges.
z Keep wires in their original position so as to reduce interference.
z Adjustment of this product please refers to the user’ manual.

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4. Handing and Placing Methods

Correct Methods: Incorrect Methods:

Only touch the metal frame of the LCD panel or the front

cover of the monitor, Do not touch the surface of the panel.

Surface of the panel is pressed by fingers and that may

cause “Mura”

Take out the monitor with cushions

Take out the monitor by grasping the LCD panel, and that

may cause “Mura”.

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Correct Methods: Incorrect Methods:

Place the monitor on a clean and soft foam pad.

Place the monitor on foreign objects. That could Scratch the

surface of the panel or cause “Mura”.

The panel is placed facedown on the lap. That may cause

“Mura”

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2. Specification

FEATURES VX2255wmb/wmh-4

Size 22" wide

Luminance (Typ) 300 cd/㎡

Contrast Ratio (Typ) 1000:1

Colors 16.7 M (6 bits + 2 bits FRC)

Response Time 5 ms(on/off) / 3ms(G to G / avg)

Viewing Angle (H/V) 170° / 160 °

TFTLCD PANEL

Recommend resolution 1680x1050@60Hz

Analog Yes (75ohms, 0.7/1.0 Vp-p)

Input Signal

Digital Yes

Separate Sync Yes

Composite Sync Yes

Sync Compatibility

Sync on Green Yes

PC Yes

Power Mac Yes

Compatibility

TV Box Yes

Power Voltage AC 100-240V, 50/60Hz Yes

On Mode(Typ) < 45 W (without audio)

Power Consumption

Off Mode (Max) ≦1 W

Audio 2W / THD 10% (Max) Yes

WebCam

1.3M / USB2.0 / Windows XP
Cable (type A to type B)

Yes

Tilt Yes ( 20 ° and -5 °)

Swivel 360°

Pivot No

Ergonomics

Height Adjust 80mm

OSD Control [ 1 ] [▲] [▼] [ 2 ] // [ ] Yes

Physical (W x H x D) 528(W) x 450(H) x 225(D) mm

Dimension

Package (W x H x D) 572(W) x 525(H) x 267(D) mm

Physical (Net Weight) 6.0 Kg / 13.3 lbs

Weight

Package (Gross Weight) 8.4 Kg / 18.6 lbs

Temperature (℉/℃) 32℉-104℉/+0℃-+40℃

Operating Condition

Humidity (%) 10 % - 90 %

Temperature (℉/℃) -4℉-140℉/-20℃-60℃

Storage Condition

Humidity (%) 10 % - 90 %

Regulation

Global: CB, MPR II,WEEE,ROHS
VSA:UL, cUL, FCC-B, TUV-S, NOM, Energy Star
VSE:TUV/ERGO(covers ISO13406-2&MPR II),CE
GOST-R+Hygienic ,SASO , ENERGY, Ukraine
VSI: BSMI, PSB, C-TICK, MIC, VCCI, Green Mark
VSCN:CCC

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Product definition and specification

VSA VSAP VSE VSCN

Region

(M) (A)/(P)/(J)/(U)/(N) (E)/(U)/(EU) (G)

Product Name VX2255wmb/wmh-4

Model Number VS11661

OSD Languages

English, French, German, Italian, Spanish, Finnish, Russian,

Korean, Japanese, Traditional Chinese, Simplified Chinese

TFT LCD Panel and Model #

1

st

INN MT220W W01 V.0

2nd CMO M220Z1-L03

3rd INN MT220W W01 V2

Scalar Mstar, Model # : TSUMO58CWHJ-LF

Input Signal D-Sub / DVI-D

Sync Compatibility Separate / Composite / SOG

Audio 2W

Power Consumption Built-in/ under 50 W (max) / 45 W(typ)

(without audio)

Power Cable Refer to Appendix G

Analog Cable (1.8 m, color : black), with PC

2001 and Hot Plug Detect &DDC

YES

DVI-D Cable

YES

WebCam

Hardware spec --- 1.3M pixel

OS support --- Windows XP/ Vista

Interface support --- USB 2.0 (type A to type B)

Program support --- Skype / Windows Live Messenger

ViewSonic CD Wizard

ViewSonic Quick Start Guide

WebCam AP Wizard

Arabic, English, Finnish, Spanish, German,

Italian, Japanese, Swedish, Polish, Korean

Portuguese, Russian, French, Greek, Dutch, Turkish,

Simplified Chinese, Traditional Chinese, Czech, Hungarian

Screen Protector Mylar

YES

Extrme Label (?ms)

NO

DCR sticker (4000:1) / 2pcs

YES

Service Insert (new version)

YES NO NO NO

Warranty Sticker

NO NO NO No

Warranty Card

(China only / new version)

NO NO NO YES

Carton Sticker

(China only / new version)

NO NO NO YES

PE bag of Carton

NO NO NO YES

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2-1 GENERAL specification

Test Resolution & Frequency 1680x1050@ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls

Factory Default:

Contrast = 70%, Brightness = 100%

2-2 VIDEO INTERFACE

Analog Input Connector DB-15 (Analog), refer the appendix A

Digital Input Connector DVI-D

Audio input 1 3.5Mini Jack

Headphone output 3.5Mini Jack

Default Input Connector Defaults to the first detected input

Video Cable Strain Relief

Equal to twice the weight of the monitor for five

minutes

Video Cable Connector DB-15

Pin out

Compliant DDC/CI / DDC/2B

Video Signals

1. Video RGB (Analog)

Separate, Composite, and Sync on Green

2. TMDS (Digital)

Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)

Maximum PC Video Signal 950 mV with no damage to monitor

Maximum Mac Video Signal 1250 mV with no damage to monitor

Sync Signals TTL

DDC/2B Compliant with Revision 1.3

DDC/CI Compliant with Revision 1.1

HDCP HDCP code inside and compatible

Sync Compatibility Separate Sync, Composite Sync, SOG

Video Compatibility

Shall be compatible with all PC type computers,

Macintosh computers, and after market video cards

640x350 640x400 640x480 720x400

720x480 800x600 832x624 1024x768

1152x864 1152x870 1280x720 1280x768

1280x960 1280x1024 1360x768 1400x1050

1440x900 1600x1200 1680x1050

Resolution Compatibility

The image vertical size might not be full screen.

But the image vertical position should be at the

center.

Exclusions Not compatible with interlaced video

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2-3 POWER SUPPLY

Internal Power Supply Part Number: 790961400600R

Input Voltage Range AC90~264 (WORLDWIDE)

Input Frequency Range

47 TO 64 HERTZ

Short Circuit Protection

OUTPUT CAN BE SHORTED WITHOUT DAMAGE

Over Current Protection

3.3~4.5A TYP. AT 5 VDC
( PROTECT WHEN SHORT CIRCUIT )

Leakage Current

3.5MA (MAX) AT 264VAC / 50HZ

Efficiency 80 % TYPICAL AT 115VAC FULL LOAD

Fuse

INTERNAL AND NOT USER REPLACEABLE

Power Dissipation

< 45 WAT T S ( T Y P ) (without audio)

Max Input AC Current

1.6A (MAX)

Inrush Current
(Cold Start)

80 A MAX./ 240V

AC

/ 50HZ

(COLD START AT 25℃,FULL LOAD)

Power Supply Cold Start

SHALL START AND FUNCTION PROPERLY WHEN UNDER FULL
LOAD, WITH ALL COMBINATIONS OF INPUT VOLTAGE, INPUT
FREQUENCY, AND OPERATING TEMPERATURE

Power Supply Transient Immunity

SHALL BE ABLE TO WITHSTAND AN ANSI/IEEE C62.41-1980
6000V 200 AMPERE RING WAVE TRANSIENT TEST WITH NO
DAMAGE

Power Supply Line Surge

Immunity

Shall be able to withstand 1.5 times nominal line voltage for one

cycle with no damage

Power Supply Missing Cycle

Immunity

Shall be able to function properly, without reset or visible screen

artifacts, when ½ cycle of AC power is randomly missing at nominal

input

Power Supply Acoustics

The power supply shall not produce audible noise that would be

detectable by the user. Audible shall define to be in compliance

with ISO 7779 (DIN EN27779:1991) Noise measurements of

machines acoustics. Power Switch noise shall not be considered

US Type Power Cable

Color = Black

Separate 3-prong NEMA 5-15P type plug. Length = 1.8m.

Connects to display.

European Type Power Cable

Color = Black

Schuko CEE7-7 type plug.

Length = 1.8m, Connects to display.

CCC Type Power Cable

Color = Black

Separate 3-prong type plug.

Length = 1.8m. Connects to display.

PSE Type Power Cable

Color = Black

Separate 2-prong NEMA 1-15P type plug.

Length = 1.8m. Connects to display.

Power Saving Operation(Method) VESA DPMS Signaling

Power Consumption

On Mode <45W (Typ) / under 50W (Max) (without audio)

Saving Mode < 2 W@230VAC 50Hz

Off Mode < 1 W @230VAC 50Hz

(DC Power Off; Meet to Energy Star Ver4.0 Tier2)

Recovery Time On Mode = N/A, Active Off < 3 sec

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2-4 ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency

24 – 82 kHz

Vertical Refresh Rate

50 – 85* Hz

Maximum Pixel Clock 165MHz,

Sync Polarity Independent of sync polarity.

Timing Table

Analog Remark

Item Timing

Separate

Composite

SOG

Digital - TMDS

1 640 x 350 @ 70 Hz, 32 kHz V V V V

2 640 x 400 @ 60 Hz, 32 kHz V V V V

3 640 x 400 @ 70 Hz, 32 kHz V V V V

4 640 x 400 @ 85 Hz, 38 kHz V V V V

5 640 x 480 @ 50 Hz, 25 kHz V V V V

6 640 x 480 @ 60 Hz, 32 kHz V V V V

7 640 x 480 @ 67 Hz, 35 kHz V V V V

8 640 x 480 @ 72 Hz 38 kHz V V V V

9 640 x 480 @ 75 Hz, 38 kHz V V V V

10 640 x 480 @ 85 Hz, 43 kHz V V V V

11 720 x 400 @ 70 Hz, 32 kHz V V V V

12 720 x 400 @ 85 Hz, 38 kHz V V V V

13 720 x 480 @ 60 Hz, 29.8 kHz V V V V

14 720 x 576 @ 50 Hz, 31.3 kHz V V V V

15 800 x 600 @ 56 Hz, 35.1 kHz V V V V

16 800 x 600 @ 60 Hz, 38 kHz V V V V

17 800 x 600 @ 72 Hz, 48 kHz V V V V

18 800 x 600 @ 75 Hz, 47 kHz V V V V

19 800 x 600 @ 85 Hz, 54 kHz V V V V

20 832 x 624 @ 75 Hz, 50 kHz V V V V

21 1024 x 768 @ 50 Hz, 40 kHz V V V V

22 1024 x 768 @ 60 Hz, 48 kHz V V V V

23 1024 x 768 @ 70 Hz, 57 kHz V V V V

24 1024 x 768 @ 72 Hz, 58.1 KHz V V V V

25 1024 x 768 @ 75 Hz, 60 KHz V V V V

26 1024 x 768 @ 75 Hz, 60.2 KHz V V V V

27 1024 x 768 @ 85 Hz, 69 KHz V V V V

28 1152 x 864 @ 75 Hz, 68 KHz V V V V

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29 1152 x 870 @ 75 Hz, 69 KHz V V V V

30 1152 x 900 @ 67 Hz, 62.5 KHz V V V V

31 1280 x 720 @ 50 Hz, 37 KHz V

XX

V

32 1280 x 720 @ 60 Hz, 45 KHz V V V V

33 1280 x 768 @ 50 Hz, 40 KHz V V V V

34 1280 x 768 @ 60 Hz, 47.8 KHz V V V V

35 1280 x 768 @ 75 Hz, 60 KHz V V V V

36 1280 x 768 @ 85 Hz, 69 KHz V V V V

37 1280 x 960 @ 50 Hz, 49 KHz V V V V

38 1280 x 960 @ 60 Hz, 60 KHz V V V V

39 1280 x 960 @ 75 Hz, 75 KHz V V V V

40 1280 x 1024 @ 50 Hz, 53 KHz V V V V

41 1280 x 1024 @ 60 Hz, 64 KHz V V V V

42 1280 x 1024 @ 75 Hz, 80 KHz V V V V

43 1360 x 768 @ 60 Hz, 48 kHz V V V V

44 1400 x 1050 @ 50 Hz, 54 kHz V V V V

45 1400 x 1050 @ 60 Hz, 65.3 kHz V V

X

V

For analog sync,

Switch 1400 x 1050@60Hz and 1680 x

1050@60Hz by [1]+[2] short cut key

(primary = 1680 x 1050@60Hz)

Auto image should be executed when

Switch 1400 x 1050@60Hz and 1680 x

1050@60Hz by [1]+[2] short cut key

46 1440 x 900 @ 60 Hz, 55.9 kHz V V V V

47 1440 x 900 @ 75 Hz, 70.6 kHz V V V V

48 1600 x 1200 @ 60 Hz, 75 kHz V V V V

49 1680 x 1050 @ 60 Hz, 65.3 kHz ü V

X

V

*1. Tolerance ≧ ±2KHz. (if the range dose not cover other timing mode)

*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message with blanking.

*3. The image quality of 85Hz mode might be worse than 75Hz.

Primary Presets

1680x1050 @ 60Hz

User Presets

Number of User Presets (recognized timings) Available: 10 presets total in FIFO configuration

Changing Modes

Maximum Mode Change Blank Time for image stability : 3 seconds (Max), excluding “Auto Image Adjust” time

Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when execute “Auto Image Adjust”

The monitor needs to do “Auto Adjust” the first time when a new mode is detected

(See section “0-Touch™ Function Actions”)

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2-5 FRONT PANEL CONTROLS AND INDICATORS

Front Panel Hardware Controls

Power Switch (Front Head) Power Control, soft Power Switch.

Power LED (Front Head)

Blue – ON

Amber – Active Off (Sleeping Mode)

Dark = Soft Power Switch OFF

Front Panel Controls (Head)

1. [ ] --- Position in the center of front

bezel bottom.

2. [ 1 ] [▲] [▼] [ 2 ] --- Position in right

side

[ 1 ] BUTTON 1

[ 2 ] Button 2

[ ] Power

[▼] DOWN ARROW BUTTON

[▲] UP ARROW BUTTON

Note: Power Button, Button 1 and Button 2 must be

one-shot logic operation. (i.e. there should be no

cycling)

Reaction Time

OSD must fully appear within 0.5s after pushing Button

1

Short Cuts Function from the button(s)

[1] Main Menu

[2] Input toggle (Analog / Digital)

[▼] or [▲] To immediately activate Audio menu.

[▲] Press the [▲] 3 seconds to switch the OD on / off

[▼]+[▲] Recall both of audio and mute to default

[1] + [2]

Toggle 1400x1050 and 1680x1050 mode when input 1400x1050

or 1680x1050 mode

[1] + [▼] + [▲]

(Keep pushing 3 sec)

White Balance. (Not shown on user’s guide)

[1] + [▼] Power Lock

[1] + [▲] OSD Lock

[2] + [▼] DDC/CI switch Æ on = DDC/CI ; off = DDC2B

[▼] +[▲] + [ ] Factory Mode

Remark : All the short cuts function are only available while OSD off

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Main Menu Controls

Auto Image Adjust*1

Contrast/Brightness*

2*4

Input Select

Analog, Digital

Audio Adjust

Volume*

4

, Mute*4

Color Adjust

sRGB, 9300K,7500K, 6500K(default), 5400,User Color [R, G, B]

Information

[H Frequency, V Frequency, Resolution, Pixel Clock, Serial Number, Model Number,

[“www.ViewSonic.com

” ]

Manual Image Adjust

Horizontal Size*

1

, H/V. Position*1, Fine Tune*1, Sharpness*3

Setup Menu

Language [English, French, German, Italian, Spanish, Finnish, Russian, Korean, Japanese,

Simplified Chinese, Traditional Chinese], Resolution Notice, OSD Position, OSD Timeout,

OSD Background

Memory Recall

*

1

These functions are not available in Digital Mode

*

2

These functions are not available under sRGB Mode.

*

3

These functions are not available under Native Resolution Mode

*

4

These functions setting can be recalled to default value by pressing [▼]+[▲]

[Remark] Please refer to the detail in the Appendix C

Function descriptions

OSD Lock short cuts function for the buttons

The OSD lock will be activated by pressing the front panel control buttons "(1), & (▲)" for 10 seconds.

If the user then tries to access the OSD by pressing any of the buttons "1", "▼", "▲", "2" a message will appear on

the screen for 3 seconds showing "OSD Locked".

The OSD lock will be deactivated by pressing the front panel control buttons "(1), & (▲)" again for 10 seconds.

Note1: When the OSD is locked will lock all functions, including “Volume” and “Mute”

Note2: Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD Locked”

Note3: OSD Lock should not lock Power Button and Power Lock function

Power Lock short cuts function for the buttons

The power button lock will be activated by pressing the front panel control buttons "(1), & (▼)" for 10 seconds.

Locking the power button means that the user won't be able to turn off the LCD while the power button is locked. If

the user presses the power button while it is locked, a message will appear on the screen for 3 seconds showing

"Power Button Locked". It also means that with the power button locked, the LCD would automatically turn back

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"On" when power is restored after a power failure. If the power button is not in the locked mode, then power should

return to it's previous state when power is restored after a power failure.

The power button lock will be deactivated by pressing the front panel control buttons "(1), & (▼)" again for 10

seconds.

Note 1: Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate “Power

Button Locked”

Note 2: Power should only be lockable in the “On State”

Memory Recall Actions

Memory Recall action on the analog and digital mode as below

1. Set the factory defaults as shown in Section 2-8

2. Clean all the mode setting buffer

3. Execute Auto Image Adjust

Note: Memory Recall should have no effect for Language, Power Lock, User Color Settings or Input Priority

Resolution Notice Actions

Resolution Notice OSD should show on screen after changing to non-native mode for 30 sec

The OSD should disappear after 10 sec or by pushing button [1] or [2]

Resolution Notice function should be disabled when push button [2] under Resolution Notice OSD

0-Touch™ Function Actions

1. Execute Auto Image Adjust when new mode detected, and save the settings to buffer for further use

2. It should be reset by Memory Recall function

(Should not reset by power off, power unplug and others)

OSD Auto Save

The OSD shall save new settings when it is turned off by the user or when it times out. There shall not be a

separate save

Input Priority

This function is defined the auto detect priority when the display has several inputs. Please refer to the detail flow

chart as the appendix D

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2-6 AUDIO INTERFACE (SPEAKER SPECIFICATION)

Line input signal 1.0 Vrms @1kHz

Line input impedance 10 kOhm

Maximum Amp power output (Watt) 2 W (RL=8Ω)

Amp -THD < 10 % THD @1kHz

Speaker Power rating(Ω/Watt) 8Ω/ 2 W

Signal to Noise Ratio 72 dB

Frequency response Fo – 20kHz

SPL. 80 ± 3 dB (at 0.5m)

FO 900 Hz

Line input connection 3.5 mm stereo jack

Vibration There should be no audible vibration resonance at volume=100% & any Freq.

Screen image There should be no affect on the screen image stability under any conditions

Connector PC99 requirement

Audio in

Lime Green pantone # 577C

Cable type / length 3.5mm stereo cable / 1.8m length

Audio DPMS

Speakers stay off when the rest of the monitor is in power saving

Note: There is no guarantee <1 W at power consumption in Active Off mode,

when the Audio Cable is connected

WebCam

Input interface USB 2.0

Maximum Amp power output (Watt) 0.8 W

Webcam action indicator

AP (on) --- Blue

AP (off) --- dark

Monitor power off --- dark (Webcam power off the same time)

When the monitor into sleeping mode,

The webcam power off the same time

Pixel Real 1.3M / CMOS

Resolution

1280 x 1024 (Static status / Max)

1024 x768 (Dynamic status / max)

Input connection USB type B

Screen image

There should be no affect on the screen image stability under any

conditions

Cable color requirement

VX2255wmb --- black

VX2255wmh --- white

Cable type / length USB2.0 type A to type B cable / 1.8m length

System requisition (at least)

OS --- Windows XP / Windows Vista

CPU --- P4 1.4Ghz or AMD Athlon 1Ghz

Memory --- 128MB

H.D. --- 200MB

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2-7 TFT LCD PANEL

Panel Characteristics:

1

st

Source Panel

Model number INN MT220W W01 V.0

Type TN type with LVDS interface

Active Size 22” wide; 473.76(H) x 296.1(V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.282(H) x 0.282(H) mm

Glass Treatment Anti Glare (Hard coating 3H)

# of Backlights 4CCFL

Backlight Life 40000Hours (Min) at 7.0mA

Luminance (5-point) –

Condition:

CT = User Color,

Contrast = Max,

Brightness = Max

300cd/㎡ (Typ after 30 minute warm up)
250cd/㎡ (Min after 30 minute warm up)

Brightness Uniformity

≧80%(typ) / 75%(min)

Contrast Ratio 1000:1 (typ), TBD(min)

Color Depth 16.7 million colors (6 bits + 2 bits FRC)

Viewing Angle (Horizontal)

Ultra –TN type

@ CR>10

Typical: 170

Minimum: 140

@ CR>5

Typical: 178

Minimum:160

Viewing Angle (Vertical)

Ultra –TN type

@ CR>10

Typical: 160

Minimum: 140

@ CR>5

Typical:170

Minimum:150

Response Time

10%-90% @ Ta=25°C

Typical = 5ms (on/off)

Maxmum =10 ms (on/off)

Panel Defects Please see Panel Quality Specifications.

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2nd Source Panel

Model number CMO M220Z1-L03

Type TN type with LVDS interface

Active Size 22” wide; 473.76(H) x 296.1(V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.282(H) x 0.282(H) mm

Glass Treatment Anti Glare (Hard coating 3H)

# of Backlights 4CCFL

Backlight Life 40000Hours (Min) at 7.0mA

Luminance (5-point) –

Condition:

CT = User Color,

Contrast = Max,

Brightness = Max

300cd/㎡ (Typ after 30 minute warm up)
250cd/㎡ (Min after 30 minute warm up)

Brightness Uniformity

≧76%(typ) / 70%(min)

Contrast Ratio 1000:1 (typ), 700:1(min)

Color Depth 16.7 million colors (6 bits + 2 bits FRC)

Viewing Angle (Horizontal)

Ultra –TN type

@ CR>10

Typical: 170

Minimum: 150

@ CR>5

Typical: TBD

Minimum: TBD

Viewing Angle (Vertical)

Ultra –TN type

@ CR>10

Typical: 160

Minimum: 140

@ CR>5

Typical: TBD

Minimum: TBD

Response Time

10%-90% @ Ta=25°C

Typical = 5ms (on/off)

Maxmum =8 ms (on/off)

Panel Defects Please see Panel Quality Specifications.

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3rd Source Panel

Model number INN MT220W W01 V.2

Type TN type with LVDS interface

Active Size 22” wide; 473.76(H) x 296.1(V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.282(H) x 0.282(H) mm

Glass Treatment Anti Glare (Hard coating 3H)

# of Backlights 4CCFL

Backlight Life 40000Hours (Min) at 7.0mA

Luminance (5-point) –

Condition:

CT = User Color,

Contrast = Max,

Brightness = Max

300cd/㎡ (Typ after 30 minute warm up)
250cd/㎡ (Min after 30 minute warm up)

Brightness Uniformity

≧80%(typ) / 75%(min)

Contrast Ratio 1000:1 (typ), 700:1(min)

Color Depth 16.7 million colors (6 bits + 2 bits FRC)

Viewing Angle (Horizontal)

Ultra –TN type

@ CR>10

Typical: 170

Minimum: 150

@ CR>5

Typical: 178

Minimum:160

Viewing Angle (Vertical)

Ultra –TN type

@ CR>10

Typical: 160

Minimum: 140

@ CR>5

Typical:170

Minimum:150

Response Time

10%-90% @ Ta=25°C

Typical = 5ms (on/off)

Maxmum =10 ms (on/off)

Panel Defects Please see Panel Quality Specifications.

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Appendix E : EDID
VX2255wm-4_A

Time: 15:34:51
Date: Mon May 21, 2007
______________________________________________________________________
______________________________________________________________________
VIEWSONIC CORPORATION
EDID Version # 1, Revision # 3
DDCTest For: ViewSonic VX2255wm-4
______________________________________________________________________
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A 63
10 | 1F 9B 01 01 01 01 01 11 01 03
20 | 0E 2F 1E 78 2E DC 55 A3 59 48
30 | 9E 24 11 50 54 BF EF 80 B3 00
40 | A9 40 95 00 90 40 81 80 81 40
50 | 71 4F 01 01 21 39 90 30 62 1A
60 | 27 40 68 B0 36 00 D6 2C 11 00
70 | 00 1C 00 00 00 FF 00 51 52 4C
80 | 30 37 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 4B 18 52 11
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 56 58 32 32 35 35 77
120 | 6D 2D 34 0A 20 20 00 E4
______________________________________________________________________
(08-09) ID Manufacturer Name ________________ = VSC
(11-10) Product ID Code _____________________ = 9B1F
(12-15) Last 5 Digits of Serial Number ______ = Not Used
(16) Week of Manufacture _________________ = 01
(17) Year of Manufacture _________________ = 2007
(10-17) Complete Serial Number ______________ = See Descriptor Block
(18) EDID Version Number _________________ = 1
(19) EDID Revision Number ________________ = 3
(20) VIDEO INPUT DEFINITION:
Analog Signal

0.700, 0.300 (1.000 Vp-p)
Separate Syncs, Composite Sync, Sync on Green
(21) Maximum Horizontal Image Size ________________ = 470 mm

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(22) Maximum Vertical Image Size __________________ = 300 mm
(23) Display Gamma ________________________________ = 2.20
(24) Power Management and Supported Feature(s):
Active Off/Very Low Power, Standard Default Color Space,
Preferred Timing Mode
Display Type = R/G/B Color
(25-34) CHROMA INFO:
Red X - 0.640 Green X - 0.284 Blue X - 0.142 White X - 0.313
Red Y - 0.349 Green Y - 0.617 Blue Y - 0.067 White Y - 0.329
(35) ESTABLISHED TIMING I:
720 X 400 @ 70Hz (IBM,VGA)
640 X 480 @ 60Hz (IBM,VGA)
640 X 480 @ 67Hz (Apple,Mac II)
640 X 480 @ 72Hz (VESA)
640 X 480 @ 75Hz (VESA)
800 X 600 @ 56Hz (VESA)
800 X 600 @ 60Hz (VESA)
(36) ESTABLISHED TIMING II:
800 X 600 @ 72Hz (VESA)
800 X 600 @ 75Hz (VESA)
832 X 624 @ 75Hz (Apple,Mac II)
1024 X 768 @ 60Hz (VESA)
1024 X 768 @ 70Hz (VESA)
1024 X 768 @ 75Hz (VESA)
1280 X 1024 @ 75Hz (VESA)
(37) Manufacturer's Reserved Timing:
1152 X 870 @ 75Hz (Apple,Mac II)
(38-53) Standard Timing Identification:
1680 X 1050 @60Hz
1600 X 1200 @60Hz
1440 X 900 @60Hz
1400 X 1050 @60Hz
1280 X 1024 @60Hz
1280 X 960 @60Hz
1152 X 864 @75Hz
Not Used
______________________________________________________________________
(52-71) Detailed Timing / Descriptor Block 1:
1680x1050 Pixel Clock: 146.25 MHz
______________________________________________________________________
Horizontal Image Size: 470 mm Vertical Image Size: 300 mm
Refreshed Mode: Non-Interlaced Normal Display - No Stereo

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Horizontal:
Active Time: 1680 pixels Blanking Time: 560 pixels
Sync Offset: 104 pixels Sync Pulse Width: 176 pixels
Border: 0 pixels Frequency: 65.29 KHz

Vertical:
Active Time: 1050 lines Blanking Time: 39 lines
Sync Offset: 3 lines Sync Pulse Width: 6 lines
Border: 0 lines Frequency: 59.95 Hz

Digital Separate, Horizontal Polarity (-) Vertical Polarity (+)

______________________________________________________________________
(72-89) Detailed Timing / Descriptor Block 2:

Monitor Serial Number:
QRL070100001

______________________________________________________________________
(90-107) Detailed Timing / Descriptor Block 3:

Monitor Range Limits:
Min Vertical Freq - 50 Hz
Max Vertical Freq - 75 Hz
Min Horiz. Freq - 24 KHz
Max Horiz. Freq - 82 KHz
Pixel Clock - 170 MHz
Secondary GTF - Not Supported

______________________________________________________________________
(108-125) Detailed Timing / Descriptor Block 4:

Monitor Name:
VX2255wm-4

(126) No Extension EDID Block(s)
(127) CheckSum OK

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VX2255wm-4_D

Time: 15:34:30
Date: Mon May 21, 2007
______________________________________________________________________
______________________________________________________________________
VIEWSONIC CORPORATION
EDID Version # 1, Revision # 3
DDCTest For: ViewSonic VX2255wm-4
______________________________________________________________________
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A 63
10 | 1F 9B 01 01 01 01 01 11 01 03
20 | 80 2F 1E 78 2E DC 55 A3 59 48
30 | 9E 24 11 50 54 BF EF 80 B3 00
40 | A9 40 95 00 90 40 81 80 81 40
50 | 71 4F 31 0A 21 39 90 30 62 1A
60 | 27 40 68 B0 36 00 D6 2C 11 00
70 | 00 1C 00 00 00 FF 00 51 52 4C
80 | 30 37 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 4B 18 52 11
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 56 58 32 32 35 35 77
120 | 6D 2D 34 0A 20 20 00 39
______________________________________________________________________
(08-09) ID Manufacturer Name ________________ = VSC
(11-10) Product ID Code _____________________ = 9B1F
(12-15) Last 5 Digits of Serial Number ______ = Not Used
(16) Week of Manufacture _________________ = 01
(17) Year of Manufacture _________________ = 2007
(10-17) Complete Serial Number ______________ = See Descriptor Block
(18) EDID Version Number _________________ = 1
(19) EDID Revision Number ________________ = 3
(20) VIDEO INPUT DEFINITION:
Digital Signal
Non - VESA DFP 1.x Compatible

(21) Maximum Horizontal Image Size ________________ = 470 mm
(22) Maximum Vertical Image Size __________________ = 300 mm