ViewSonic VLCDS26105-2W, VX900-2 Service Manual

Service Manual

ViewSonic VX900-2

Model No.VLCDS26105-2W

19” Color TFT LCD Display

(VX900-2_SM_637 - Rev.1a-Feb 2003)

ViewSonic



381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Copyright¤ 2003 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

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

Revision History

Revision Date Description Of Changes Approval

1a 02/14/03 Initial Reversion DCN-2963 C.Shen

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PRECAUTIONS AND NOTICES

Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in the user manual for this product.

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Read all of these instructions.

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Save these instructions for later use.

z

Follow all warnings and instructions marked on the product.

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Do not use this product near water.

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This display should be installed on a solid horizontal base.

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When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray

with liquid or aerosol cleaners.

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Do not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet

and other parts.

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Adequate ventilation must be maintained to ensure reliable and continued operation and to protect the display from overheating. Do not block ventilation slots and openings with objects or install the display in a place where ventilation may be hindered.

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Do not install this display near a motor or transformer where strong magnetism is generated. Images on the display will become distorted and the color irregular.

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Do not allow metal pieces or objects of any kind fall into the display from ventilation holes.

Slots and openings in the cabinet and the back or bottom are provided for ventilation, to ensure reliable operation of the product and to protect it from overheating, those openings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface. This product should never be placed near or over a radiator or heat register. This product should not be placed in a built-in installation unless proper ventilation is provided.

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Content

1. Engineering Specifications . ...........................................................................................1

1.1 Scope ........................................................................................................................1

1.2 Electrical Characteristics ...........................................................................................4

1.3 Mechanical Characteristics .....................................................................................14

1.4 Packaging ...............................................................................................................15

1.5 Environmental Characteristics.................................................................................15

1.6 Factory setting.........................................................................................................15

Appendix I Preset Signal Timings..............................................................................16

Analog timing mode table.......................................................................................17

Digital timing mode table........................................................................................19

Appendix II EDID Code...............................................................................................21

Analog....................................................................................................................21

Digital .....................................................................................................................21

Appendix III Label Printing..........................................................................................22

ID LABEL ...............................................................................................................22

Bar Code label/Serial No Label ..............................................................................22

2. Front Panel Function Control Description...................................................................23

2.1 User control functions..............................................................................................23

2.2 OSD operation flow .................................................................................................24

3. Circuit Description .........................................................................................................33

3.1 Interface Board........................................................................................................33

3.2 Audio Board ............................................................................................................37

4. Troubleshooting Flow Chart .........................................................................................40

4.1 Figure of Waveform.................................................................................................39

4.2 No Display on Screen (Screen is black, LED is off).................................................42

4.3 No Display on Screen ( LED is green).....................................................................43

4.4 No Power On...........................................................................................................44

4.5 No Sound (Test signal: 1r.m.s sine waveform ) .......................................................45

4.6 Show “No Signal” on screen....................................................................................46

4.7 Keypad can not work...............................................................................................46

5. Adjust Procedure ...........................................................................................................47

6. Mechanical Assembly....................................................................................................53

1. Preparation Of Manual Alignment .............................................................................48

2. Color Temperature Alignment....................................................................................50

3. Factory Preset Setting...............................................................................................51

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9. PCB LAYOUT..................................................................................................................66

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8. Schematic Daigrams.......................................................................................................59

7. Explode Diagram and Mechanical Parts List ...............................................................58

Appendix

10. Recomended Spare Parts List......................................................................................69

Reader's Response

11. Complete Parts List.......................................................................................................71

I. Engineering Specifications.

1. Scope

The following specifications are applicable to model VX900-2 19 inch color LCD monitor.

General Description (VX900-2)

Fujitsu 19.0” SXGA TFT- MVA (premium)

LCD

Size

Effective Display Size

Pixel Pitch

Resolution

Brightness

Contrast Ratio

Color

Viewing Angle

Surface treatment

19.0 inches diagonal

376.32 mm X 301.056 mm (typical)

0.294 mm X 0.294 mm

1280 x 1024 dot (SXGA)

250 cd / m² (typ.), 200 min.

600:1(typ.), 400 (min.)

16,777,216

Up 85° Down 85°(min.)

Left 85° Right 85°(min.)

CR>10:1

Anti-Glare

Input Signals RGB

Digital

Analog 0.7 Vp-p / 75Ө

Separate sync.

Composite sync

Sync-On-Green

TMDS.

Positive Polarity

TTL level

Input connector Analog mini D-sub 15 pin x 1

Digital DVI-D x 1

Audio min-Din 2 channel x 2

Micro-phone jack

Speaker Max 3W x 2

Main IC GM5120

Display Colors 16,777,216

Preset Timings SXGA/60Hz, 75Hz,

XGA/60Hz, 70Hz, 75Hz, 85Hz

SVGA/56Hz, 60Hz, 72Hz, 75Hz, 85Hz

VGA/60Hz, 72Hz, 75Hz, 85Hz

Dos-text/70Hz

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Synchronization Horizontal

Vertical

Non-interlaced

30 kHz to 83 kHz

50 Hz to 75 Hz

Max Pixel Rated 135Mhz

(automatically)

Resolution Horizontal

Vertical

1280 dots

1024 lines

Active Display

Area

Horizontal

Vertical

376.32 mm (typical)

301.056 mm (typical)

(Active display area is dependent upon signal timings)

Power Supply

Rating

AC adapter input AC90V-264V 50 / 60 Hz

AC Power

Consumption

60W (Max.)

less than 3W

On mode

Off mode( w/o audio cable connected )

Current Rating AC input

DC input

0.7A

4.0A

@AC 100-240V

@DC 12.0V

Dimensions Net

Gross

442.0 (W) x 474.6 (H) x 180.6 (D) mm

565.0 (W) x 525.0 (H) x 260.0 (D) mm

Weight Net

Gross

7.5Kg

10.2Kg

Environmental

Conditions

Operating Temperature

Operating Humidity

Storage Temperature

Storage Humidity

0 to 50°C (PANEL SURFACE)

20 to 85% ( no condensation, < wetbulb

29 degree C)

-20 to 60°C

5 to 85% ( no condensation, < wetbulb

29 degree C )

Accessories AC power cord-UL

AC power cord-Schuko

Analog VGA cable

DVI-D cable

Audio cable

Microphone cable

ViewSonic CD-Wizard

1.8m

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Regulatory

Standards

UL, CSA or cUL, CB Report, CE, FCC-B, DOC-B, TUV/Ergo

(which covers ISO13406-2 and MPRIII), TUV/GS, PCT (GOST-R)

with 20 Hygienic certificates, PCBC (B Mark), SEMKO, DEMKO,

FIMKO, NEMKO, BSMI, VCCI, CCIB/EMC, CCEE, PSB

(Singapore Safety), TCO’99, NOM and Argentina IRAM (thru TUV).

OSD Language English, French, German, Spanish, Finnish, Italian, Japanese,

Traditional Chinese, Simplified Chinese

Others Tilt Angle 20° up / 5° down

Power Saving System

User Control by tact switch keypad with On Screen Display-

VESA DDC1/2B compatible ( digital port DDC2B only)

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2. Electrical Characteristics

2.1 Power Supply

2.1.1 AC Input

Input Voltage AC90-264V

Frequency 47 / 63Hz

Power Consumption:

60 W (max) on mode

Less than 3W power save mode ( audio cable not connected )

Current Rating 0.7A @ AC100-240V

2.2 LCD

LCD Fujitsu (TFT-MVA)

Effective display size 376.32 (H) x 301.06 (V) mm (typ.)

19.0” / 48 cm diagonal

Pixel number 1280 x 1024 pixels

Color filter arrangement R.G.B. vertical stripe

Display method TFT, normally black

Drive method Active matrix (TFT) – MVA

Dot pitch 0.098 (H) x 0.294 (V) mm

Pixel pitch 0.294 (H) x 0.294 (V) mm

Dot number 1280 x 1024 x 3 dots

Backlight Edge-lighting type with 4 CCFLs

(Cold Cathode Fluorescent Tube)

Brightness 200 cd / m2(min: center / all white) Contrast ratio 400:1 (min)

Display color 16,777,216

Typical viewing angle Up 85° / down 85° / right 85° / left 85° (min.)

(Contrast ratio>10 at Ta=25°C, 77°F)

Response time 25 msec (Typical at 25 degree C)

2.3 Interface Signals

2.3.1 RGB Video Signals

2.3.1.1 Separate Sync . Signals

Analog R,G,B 0 - 0.7 Vp-p Signal Level 75Ө± 5%

Sync Level TTL level

Sync Polarity independent

2.3.1.2 Sync On green, Composite Sync

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2.3.2 TMDS digital Signals

2.3.2.1 Video type

DVI 1.0 compliant

2.3.3 Audio spec.

2.3.3.1 Line input connection

3.5 mm stereo jack x 1

2.3.3.2 Line input signal & impedance

1.0Vrms, 10 kOhm

2.3.3.3

OUTPUT SIGNAL AT SPEAKER TERMINAL

3W @ < 5% DISTORTION

2.3.3.4 Frequency Response

400 Hz – 20 KHz

2.3.3.5 Connector PC99 requirement Audio in

Lime Green pantone # 577C

2.3.3.6 Cable length

1.8 m

2.3.3.7 Audio DPMS

Speakers stay on when the rest of the monitor is in power saving.

2.3.3.8 Speakers

Impedance 4 Ohm

Output Wattage 3.0W (max.) x 2

2.3.4 Input Signal Connectors

2.3.4.1 Analog RGB Video Input : 15 pin mini D-sub

PIN NO. Separate Sync

1 RED

2 GREEN

3 BLUE

4 GROUND

5 GROUND

6 GROUND

7 GROUND

8 GROUND

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9 +5V

10 GROUND

11 N.C

12 SDA

13 H.SYNC

14 V.SYNC

15 SCL

5 1

2.3.4.2 Digital TMDS DVI-D Connector

24 pin DVI-D connector pin assignment

Pin No. Signal Name Description

1 RX2- TMDS negative differential input, channel 2

2 RX2+ TMDS positive differential input, channel 2

3 GND Logic Ground

4 Reserved 4 Reserved. No connection

5 Reserved 5 Reserved. No connection

6 DDC-CLK DDC2B Clock

7 DDC-DAT DDC2B Data

8 Reserved 8 Reserved. No connection

9 RX1- TMDS negative differential input, channel 1

10 RX1+ TMDS positive differential input, channel 1

11 GND Logic Ground

12 Reserved 12 Reserved. No connection

13 Reserved 13 Reserved. No connection

14 VCCX Power

15 GND Logic Ground

16 SENS SENSE Pin, Pull High

17 RX0- TMDS negative differential input, channel 0

18 RX0+ TMDS positive differential input, channel 0

19 GND Logic Ground

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20 Reserved 20 Reserved. No connection

21 Reserved 21 Reserved. No connection

22 GND Logic Ground

23 RXC+ TMDS positive differential input, reference clock

24 RXC- TMDS negative differential input, reference clock

2.3.4.3 Audio Connector

2.5 mm Stereo jack x 1,

3.5mm Microphone jack x 1

2.3.5 Signal Timing

2.3.5.1 User Timing Mode memory

always do auto image adjust after timing mode change

2.3.5.2 Timing mode Change

maximum time for mode Change with auto image adjust 7 sec.

2.3.5.3 Signal Timing Table

The factory test input video signal is defined as the following table:

Preset H.sync V.sync SYN

POL. Video Mode Description

No. Frequency Frequency H- V-

MOD [1]

31.468  1 .0KHz 70.0 1.0Hz

+ - 640X350(70) Text mode

MOD [2]

31.468  1 .0KHz 70.0 1.0Hz

- + 720X400(70) Dos text

MOD [3]

31.468  1 .0KHz 59.94  1.0Hz

- - 640X480(60) VESA STANDARD

MOD [4]

35.01  1 .0KHz 66.67 1.0Hz

- - 640X480(66) MAC

MOD [5]

37.86  1 .0KHz 72.81 1.0Hz

- - 640X480(72) VESA STANDARD

MOD [6]

37.5  1 .0KHz 75.0  1.0Hz

- - 640X480(75) VESA STANDARD

MOD [7]

43.27  1 .0KHz 85.0  1.0Hz

- - 640X480(85) VESA STANDARD

MOD [8]

35.16  1 .0KHz 56.25 1.0Hz

+ + 800X600(56) VESA STANDARD

MOD [9]

37.88  1 .0KHz 60.32 1.0Hz

+ + 800X600(60) VESA STANDARD

MOD [10]

48.077  1 .0KHz 72.19  1.0Hz

+ + 800X600(72) VESA STANDARD

MOD [11]

46.875  1 .0KHz 75.0 1.0Hz

+ + 800X600(75) VESA STANDARD

MOD [12]

53.67  1 .0KHz 85.0  1.0Hz

+ + 800X600(85) VESA STANDARD

MOD [13]

49.72  1 .0KHz 74.5  1.0Hz

- - 832X624(75) MAC

MOD [14]

48.363  1 .0KHz 60.0 1.0Hz

- - 1024X768(60) VESA STANDARD

MOD [15]

58.01  1 .0KHz 72.08 1.0Hz

- - 1024X768(72) VESA STANDARD

MOD [16]

60.023  1 .0KHz 75.0 1.0Hz

+ + 1024X768(75) VESA STANDARD

MOD [17]

68.67  1 .0KHz 85.0  1.0Hz

+ + 1024X768(85) VESA STANDARD

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MOD [20]

63.981  1 .0KHz 60.02  1.0Hz

+ + 1280X1024(60) VESA STANDARD

MOD [21]

79.976  1 .0KHz 75.0 1.0Hz

+ + 1280X1024(75) VESA STANDARD

2.4 Luminance Control

Analog signal (6500K)

over 200 cd / m2 (@ Cont / Bright max)

Digital signal (6500K)

over 200 cd / m2 (@ Cont / Bright max)

2.5. Synchronization

Horizontal: 30 to 83 kHz

Vertical: 50 to 75 Hz Non-interlaced

maximum 75Hz @ 1280 x 1024 mode

Recommended 60Hz @ 1280 x 1024 mode

2.6 Display Characteristics

2.6.1 Picture Size

Horizontal Width 376.32 mm (typical)

Vertical Width 301.06 mm (typical)

2.6.2 Optical Characteristics

General qualities: The following data was measured by BM7 of TOPCON

data are panel optical data, for analog signal there are +- 5% tolerance.

Item Code Conditions Min. Typ. Max. Unit

Contrast CR

White㧛Black at Image

Center

400 600

㧙㧙

White

Brightness



VMAX

FULL White 200 250

㧙

cd / m

Uniformity of

Brightness

Bmin

Bmax

㧙㧙

Response

At 25 degree

Tpd

All White ψ All Black

All Black ψ All White

㧙

Right

CenterCR㧪10

㧙

Degree

Viewing Left

85 㧙Degree

Angle Up

85 㧙Degree

Down

85 㧙Degree

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Luminance

control

All White(digital signal

or analog 6500k)

Brightness at center of

display surface

>=200 (cont / bright

backlight max)

cd / m

These characteristics were measured under the following conditions:

Temperature: 77 ± 6°F, 25 ± 5°C

Viewing angle: AU = 0°, AR = 0°

Warm Up time: minimum 30 minutes

Measuring instrument: TOPCOM BM-7 Luminance Meter

Measuring distance: 500 mm

Measuring angle: 2°

BM-7

500mm

2 Degree

Notes:

(Note 1) Contrast ratio is defined as the following formula.

Contrast ratio =

Brightness(Luminance) with all pixels at "white"

Bri

htness with allpixels at " black"

(Note 2) Viewing angle is measured as follows:

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(Note 3) Definition of response time is as follows:

Response time is measured when the display data is changed from white to black.

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100

㧑

Optical Response

White

White(TFT OFF)

Black(TFT ON) White(TFT OFF)

(Note 4) Judge points for brightness uniformity

Brightness uniformity is judged at nine (9) points on display area:

(9)

(3)

(5)

(7)

(1)

128 512 896

384

670

(6)

(2)

(4)

(8)

BUNI

㧩

Bmin

Bmax

Bmax : Maximum Brightness

Bmin : Minimum Brightness

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2.6.3. LCD Panel

Mechanical

Active Area (mm) 376.32 x 301.056

Pixel pitch (mm) 0.294 (0.098x3)

Mass typical (g) 3000

Panel dimensions (WxDxH) mm 414x335x23 mm(typ.)

Resolution

1280 x 1024

Surface Treatment with Haze value Anti-glare, 2H

Panel Model number FLC48SXC8V-01 (19” TFT)

Panel Interfaces Dual LVDS

Optical performance

Contrast ratio 600:1 Typical

400 :1 Minimum

Luminance of white(center) 250 nits Typical

200 nits Minimum

White Uniformity 75% (5 points measurement)

Chromaticity values (red, green, blue) center

‘x = +/- 0.030

‘y = +/- 0.030

Color temperature

‘x = 0.323 +/- 0.030

‘y = 0.337 +/- 0.030

EBU 85% Min

Colors True 8 bits (16.7M)

Viewing Angle H, V (CR >10) 170 (Min)

Film

Not used wide viewing film

Response time ms

Typical Tr = 15ms ; Tf = 10ms

Maximum Tr = 30ms; Tf = 25ms

Number of Back Light(CCFL) 4 – Edge type back light

Backlight (hrs) 50,000 hours minimum; 60,000 hours typical

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2.7 Power Management

Unit will enter power saving mode under the following conditions:

Power Management condition and status

State Signals Power Video LCD LED

Horizontal Vertical Video Supply Circuit

On Pulses Pulses Active On On On Green

Stand-by No Pulses Pulses Blanking Off Off Amber

Suspend Pulses No

Pulses

Off No Pulses No

Pulses

Complete N/A N/A N/A Off Off

2.8 FullScan Capability

When the input display mode is not 1280x1024, the image area is changed as follows:

Flex Scan Input display Expanded Rate Expanded

Mode Mode Resolution Horizontal Vertical Resolution

Expansion 1 640x350 2 2.93 1280x1024

Expansion 2 640x400 2 2.56 1280x1024

Expansion 3 640x480 2 2.13 1280x1024

Expansion 4 720x400 1.78 2.56 1280x1024

Expansion 5 800x600 1.6 1.71 1280x1024

Expansion 6 832x624 1.54 1.64 1280x1024

Expansion 7 1024x768 1.25 1.33 1280x1024

Expansion 8 1152x864 1.11 1.19 1280x1024

Standard 1280x1024 1 1 1280x1024

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Mechanical Characteristics

3.1 Dimensions

Net: 442.0 (W) x 474.6 (H) x 180.6 (D) mm

Gross: 565.0 (W) x 525.0 (H) x 260.0 (D) mm

3.2 Weight

Net:

7.5Kg

Gross: 10.2 Kg

3.3 Base Rotation

Tilt: up 20 ° / down 5 °

3.4 Labeling

3.4.1 ID Label ( Paste on Rear Cover )

Material: Polyester’s

Color: Black (same as plastic color) / White (Letter)

Size: 50 (W) X 25 (H) mm

Location: Rear Back Label

Contents: Appendix III

3.4.2 Bar Code Number Label (Carton Box)

Material: Art Paper

Color: White (Base) / Black (Letter)

Size: 76 (W) X 76 (H) mm

Location: Carton Box (Side Wall)

Contents: Appendix III

3.4.3 Serial Number Label (Rear Back Label)

Material: Art Paper

Color: White (Base) / Black (Letter)

Size: 25 (W) X 50 (H) mm

Location: Paste on Rear Back Label

Contents: Appendix III

3.5 Serial Number Format

Serial No. PPP

YY WW XXXXX

Serial No. (5-digit)

Manufacturing week

Last digit of manufacturing year

Regional Product ID Code :

VX900-2:A24

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3.6 UPC Coding (Code 39 format)

Worldwide Model UPC Code: 766907 80262 7

4. Packaging

4.1 Carton Box

Dimensions: 565(W) x 525(H) x 260(D) mm

Color: 4-Color printing box

Material: BC-FLUTE or Equivalent, double wall

5. Environmental Characteristics

5.1 Operating Conditions

Temperature: 0 Through + 40° C

Humidity: 20% To 85% ( 39 degree welt bulb )

Altitude: 0 – 3,000 Meter

5.2 Non-operating Conditions

Temperature: -20 Through +60 ° C

Humidity: 5% To 85% ( 39 degree welt bulb )

Altitude: 0 – 12,000 meter

6. Factory setting

6.1 OSD

Brightness 100% (based on 0-100%)

Contrast 80% (based on 0-100%)

AutoTune Executed

Color Temperature 6500k

Volume 50%

Balance 50%

Bass/Treble 50%

OSD Timeout 15 Sec

Language English

OSD position Center

6.2 Power Switch

OFF

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Appendix I Preset Signal Timings

H total

H pulse

H front H back

Horizontal

V total

V pulse

V front

V back

V active

Vertical

H-Video

H active

V-Video

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Analog timing mode table

1 2 3 4 5 6 7

Signal name symbol TEXT mode TEXT mode VGA MAC-II VESA-VGA VESA-VGAVESA-VG

H-frequency (kHz) 31.468 31.469 31.468 35.001 37.5 37.862 43.269

V-frequency (Hz) 70.087 70.087 59.941 66.667 75 72.807 85.005

Pixel rate (MHz) 25.175 28.322 25.175 30.240 31.5 31.501 36.000

H-sync Ths 96 108 96 64 64 40 56

H-back porch Thb 48 54 48 96 120 128 80

Count num (H-total) Thd 800 900 800 864 840 832 832

H- front porch Thf 16 18 16 64 16 24 56

V-sync Tvs 2 2 2 3 3 3 3

V-back porch Tvb 60 35 33 39 16 28 25

Count num (V-total) Tvd 449 449 525 525 500 520 509

V-front porch Tvf 37 12 10 3 1 9 1

H-sync. Polarity Positive Negative Negative Negative Negative Negative Negative

V-sync Polarity Negative Positive Negative Negative Negative Negative Negative

H-resolution (dots) 640 720 640 640 640 640 640

V-resolution (lines) 350 400 480 480 480 480 480

8 9 10 11 12 13 14

Signal name Symbol IBM-8514A SVGA SVGA SVGA SVGA MAC 16" XGA

H-frequency (kHz) 35.156 37.879 48.077 46.875 53.674 49.725 48.363

V-frequency (Hz) 56.250 60.317 72.188 75.000 85.061 74.5 60.004

Pixel rate (MHz) 36.000 40.000 50.000 49.500 56.250 57.283 65.000

H-sync Ths 72 128 120 80 64 64 136

H-back porch Thb 128 88 64 160 152 224 160

Count num (H-total) Thd 1024 1056 1040 1056 1048 1152 1344

H- front porch Thf 24 40 56 16 32 32 24

V-sync Tvs 2 4 6 3 3 3 6

V-back porch Tvb 22 23 23 21 27 39 29

Count num (V-total) Tvd 625 628 666 625 631 667 806

V-front porch Tvf 1 1 37 1 1 1 3

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H-sync. Polarity Negative Positive Positive Positive Positive Negative Negative

V-sync Polarity Negative Positive Positive Positive Positive Negative Negative

H-resolution (dots) 800 800 800 800 800 832 1024

V-resolution (lines) 600 600 600 600 600 624 768

15 16 17 18 19 20 21

Signal name Symbol XGA XGA XGA XGA SXGA 720P SXGA

H-frequency (kHz) 56.476 58.099 60.023 68.677 63.981 45.000 79.976

V-frequency (Hz) 70.069 72.082 75.029 84.997 60.02 60.00 75.025

Pixel rate (MHz) 75.000 78.084 78.750 94.500 108 74.250 135

H-sync Ths 136 136 96 96 112 40 144

H-back porch Thb 144 160 176 208 248 270 248

Count num (H-total) Thd 1328 1344 1312 1376 1688 1658 1688

H- front porch Thf 24 24 16 48 48 60 16

V-sync Tvs 6 6 3 3 3 5 3

V-back porch Tvb 29 29 28 36 38 20 38

Count num (V-total) Tvd 806 806 800 808 1066 750 1066

V-front porch Tvf 3 3 1 1 1 5 1

H-sync. Polarity Negative Negative Positive Positive Positive Negative Positive

V-sync Polarity Negative Negative Positive Positive Positive Negative Positive

H-resolution (dots) 1024 1024 1024 1024 1280 1280 1280

V-resolution (lines) 768 768 768 768 1024 720 1024

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Confidential – Do Not Copy VX900-2

Digital timing mode table

1 2 3 4 5 6 7

Signal name symbol TEXT mode TEXT mode VGA VGA VESA-VGAVESA-VGAVESA-VG

H-frequency (kHz) 31.468 31.469 31.468 31.468 37.5 37.862 43.269

V-frequency (Hz) 70.087 70.087 70.000 59.941 75 72.807 85.005

Pixel rate (MHz) 25.175 28.322 25.175 25.175 31.5 31.501 36.000

H-sync Ths 96 108

96 64 40 56

H-back porch Thb 48 54

48 120 128 80

Count num (H-total) Thd 800 900

800

800 840 832 832

H- front porch Thf 16 18

16 16 24 56

V-sync Tvs 2 2

2 3 3 3

V-back porch Tvb 60 35

33 16 28 25

Count num (V-total) Tvd 449 449

449

525 500 520 509

V-front porch Tvf 37 12

6 1 9 1

H-sync. Polarity Positive Negative Negative Negative Negative Negative Negative

V-sync Polarity Negative Positive Negative Negative Negative Negative Negative

H-resolution (dots) 640 720 640 640 640 640 640

V-resolution (lines) 350 400 400 480 480 480 480

8 9 10 11 12 13 14

Signal name Symbol IBM-8514A SVGA SVGA SVGA SVGA XGA XGA

H-frequency (kHz) 35.156 37.879 48.077 46.875 53.674 48.363 56.476

V-frequency (Hz) 56.250 60.317 72.188 75.000 85.061 60.004 70.069

Pixel rate (MHz) 36.000 40.000 50.000 49.500 56.250 65.000 75.000

H-sync Ths 72 128 120 80 64 136 136

H-back porch Thb 128 88 64 160 152 160 144

Count num (H-total) Thd 1024 1056 1040 1056 1048 1344 1328

H- front porch Thf 24 40 56 16 32 24 24

V-sync Tvs 2 4 6 3 3 6 6

V-back porch Tvb 22 23 23 21 27 29 29

Count num (V-total) Tvd 625 628 666 625 631 806 806

V-front porch Tvf 1 1 37 1 1 3 3

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Confidential – Do Not Copy VX900-2

H-sync. Polarity Negative Positive Positive Positive Positive Negative Negative

V-sync Polarity Negative Positive Positive Positive Positive Negative Negative

H-resolution (dots) 800 800 800 800 800 1024 1024

V-resolution (lines) 600 600 600 600 600 768 768

15 16 17 18 19

Signal name Symbol XGA XGA XGA SXGA HD-720P

H-frequency (kHz) 58.099 60.023 68.677 63.981 45.000

V-frequency (Hz) 72.082 75.029 84.997 60.02 60.00

Pixel rate (MHz) 78.084 78.750 94.500 108 74.250

H-sync Ths 136 96 96 112 40

H-back porch Thb 160 176 208 248 270

Count num (H-total) Thd 1344 1312 1376 1688 1658

H- front porch Thf 24 16 48 48 60

V-sync Tvs 6 3 3 3 5

V-back porch Tvb 29 28 36 38 20

Count num (V-total) Tvd 806 800 808 1066 750

V-front porch Tvf 3 1 1 1 5

H-sync. Polarity Negative Positive Positive Positive Negative

V-sync Polarity Negative Positive Positive Positive Negative

H-resolution (dots) 1024 1024 1024 1280 1280

V-resolution (lines) 768 768 768 1024 720

ViewSonic Corporation

Confidential – Do Not Copy VX900-2

Appendix II EDID Code

Analog

239!CZUFT!PG!FEJE!DPEF;!

!!!!!!!!!1!!!2!!!3! ! !4!!!5!!!6! ! !7!!!8!!!9! !! :!

!!!!!!```````````````````````````````````````!

!!1! ! }!!11! ! GG!!GG!!GG!!GG!! GG!!GG!!11!! 6B! !74!

!21!!}! ! 22! ! :1! ! 12! ! 12!!12!!12!!12!! 1D!!12!!14!

!31!!}! ! 1F! ! 37! ! 2F! ! 89!!3B!!3D!!:6!! B7!!69!!5B!

!41!!}! ! :B! ! 37! ! 32! ! 61!!65!!CG!!FG!! 11!!92!!91!

!51!!}! ! 12! ! 12! ! 12! ! 12!!12!!12!!12!! 12!!12!!12!

!61!!}! ! 12! ! 12! ! 12! ! 12!!41!!3B!!11!! :9!!62!!11!

!71!!}! ! 3B! ! 51! ! 41! ! 81!!24!!11!!89!! 3E!!22!!11!

!81!!}! ! 11! ! 2F! ! 11! ! 11!!11!!GG!!11!! 52!!43!!45!

!91!!}! ! 41! ! 43! ! 41! ! 42!!41!!41!!41!! 41!!42!!1B!

!:1!!}! !11! !11! ! 11! ! GE! ! 11! ! 43! ! 5C! ! 2F! !64! ! 1F!

211!! }!!11! ! 1B! !31!!31!!31!!31! ! 31! !31! !11! ! 11!

221!! }!!11! ! GD! !11!!67!!69!!4:! ! 41! !41! !3E! ! 43!

231!! }!!1B!! 31! ! 31! !31! !31! !31! !11! !BE!

Digital

239!CZUFT!PG!FEJE!DPEF;!

!!!!!!!!!1!!!2!!!3!!!4!!!5!!!6!!!7!!!8!!!9!!!:!

!!!!!!````````````````````````````````````````!

!!1!!}!!11!!GG!!GG!!GG!!GG!!GG!!GG!!11!!6B!!74!

!21!!}!!22!!:1!!12!!12!!12!!12!!12!!1D!!12!!14!

!31!!}!!91!!37!!2F!!89!!3B!!3D!!:6!!B7!!69!!5B!

!41!!}!!:B!!37!!32!!61!!65!!CG!!FG!!11!!92!!91!

!51!!}!!42!!1B!!12!!12!!12!!12!!12!!12!!12!!12!

!61!!}!!12!!12!!12!!12!!41!!3B!!11!!:9!!62!!11!

!71!!}!!3B!!51!!41!!81!!24!!11!!89!!3E!!22!!11!

!81!!}!!11!!2F!!11!!11!!11!!GG!!11!!52!!43!!45!

!91!!}!!41!!43!!41!!42!!41!!41!!41!!41!!42!!1B!

!:1!!}!!11!!11!!11!!GE!!11!!43!!5C!!2F!!64!!1F!

211!!}!!11!!1B!!31!!31!!31!!31!!31!!31!!11!!11!

221!!}!!11!!GD!!11!!67!!69!!4:!!41!!41!!3E!!43!

231!!}!!1B!!31!!31!!31!!31!!31!!11!!13!

ViewSonic Corporation

Confidential – Do Not Copy VX900-2

+ 59 hidden pages

ViewSonic VLCDS26105-2W, VX900-2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual