Viewsonic VX924-1 Schematic

Service Manual

ViewSonic VX9241

Model No. VS10162

19” Color TFT LCD Display

ViewSonic

(VX912_SM. 1a May 2005)



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

Copyright 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.

ECR Number

05/09/05

Revision History

Description of Changes

Initial Release

EditorRevision SM Editing Date

A. Lu

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TABLE OF CONTENTS

1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjustment Procedure

6. Troubleshooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram and Spare Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

11 17

27 49

55 58 68 70

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1. Precautions and Safety Notices

1. Appropriate Operation

(1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning the LCD panel surface. (3) Use a soft cloth soaked with mild detergent to clean the display housing. (4) Use only a high quality, safety approved AC/DC power cord. (5) Disconnect the power plug from the AC outlet if the product will not be used for a long period of time. (6) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off. (7) Do not touch the LCD panel surface with sharp or hard objects. (8) Do not place heavy objects on the LCD display, video cable, or power cord. (9) Do not use abrasive cleaners, waxes or solvents for your cleaning. (10) Do not operate the product under the following conditions:

- Extremely hot, cold or humid environment.

- Areas containing excessive dust and dirt.

- Near any appliance generating a strong magnetic field.

- In direct sunlight.

2. Caution

No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly familiar

with all of the following safety checks and servicing guidelines.

3. Safety Check

Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit, the voltage is

exposed in such areas as the associated transformer circuits.

4. LCD Module Handling Precautions

4.1 Handling Precautions

(1) Since front polarizer is easily damaged, pay attention not to scratch it. (2) Be sure to turn off power supply when connecting or disconnecting input connector. (3) Wipe off water drops immediately. Long contact with water may cause discoloration or spots. (4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth. (5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard surface. (6) Since CMOS LSI is used in this module, take care of static electricity and ensure human earth when handling. (7) Do not open or modify the Module Assembly. (8) Do not press the reflector sheet at the back of the module in any direction. (9) In the event that a Module must be put back into the packing container slot after it was taken out of the

container, do not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL Reflector edge softly. Otherwise the TFT Module may be damaged.

(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate or tilt the Interface

Connector of the TFT Module.

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(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or

bend the TFT Module even momentarily. When designing the enclosure, it should be taken into consideration that no bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module may be damaged.

(12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local

ordinances or regulations for disposal.

(13) The LCD module contains a small amount of materials having no flammability grade. The LCD module

should be supplied with power that complies with the requirements of Limited Power Source (IEC60950 or UL1950), or an exemption should be applied for.

(14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950

or UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit.

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Correct methods : Incorrect Methods :

Only touch the metal frame of the panel or the front cover of the monitor. Do not touch the surface of the polarizer .

If the surface of the panel is pressed by fingers, this may cause "MURA."

Take out the monitor by grasping the cushion. If the monitor is removed by grasping the LCD

panel, that may cause "MURA."

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Correct Methods : Incorrect Methods :

Place the monitor on a clean & soft foam pad . If the monitor is placed on foreign objects,

that could scratch the surface of the panel.

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2. Specification

z GENERAL specification

Test Resolution & Frequency 1280x1024 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls

Factory Default:

Contrast = 70%, Brightness = 100%

z VIDEO INTERFACE

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

Digital Input Connector DVI-I (Digital), refer the appendix B

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 1/2B

1. Video RGB (Analog)

Video Signals

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 LVDS

DDC 1/2B Compliant with Revision 1.3

Sync Compatibility Separate Sync, Composite Sync, SOG

Shall be compatible with all PC type computers,

Video Compatibility

Macintosh computers, and after market video cards

640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x

600, 832 x 624, 1024 x 768, 1152 x 864, 1152 x 870,

1280 x 720, 1280 x 960, 1280 x 1024

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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z POWER SUPPLY

Internal Power Supply Part Number: FSP035-1PI01

Input Voltage Range 90 TO 264 VAC

Input Frequency Range 47.5 TO 63 HERTZ

Short Circuit Protection Output can be shorted without damage

Over Current Protection 3.5 A typical at 12.0 VDC ( Protect when short circuit )

Leakage Current 0.75mA (Max) at 264VAC / 50Hz

EFFICIENCY 77 % typical at 115VAC Full Load

Fuse Internal and not user replaceable

Power Dissipation 35 Watts (typ)

Max Input AC Current 1.2 Arms @ 90VAC, 0.7 Arms @265VAC

INRUSH CURRENT (COLD START) 60 A @ 115VAC

Shall start and function properly when under full load,

Power Supply Cold Start

Power Supply Transient Immunity

Power Supply Line Surge Immunity

Power Supply Missing Cycle Immunity

Power Supply Acoustics

with all combinations of input voltage, input frequency,

and operating temperature

Shall be able to withstand an ANSI/IEEE C62.41-1980

2000V 200 ampere ring wave transient test with no

damage

Shall be able to withstand 1.5 times nominal line voltage

for one cycle with no damage

Shall be able to function properly, without reset or visible

screen artifacts, when ½ cycle of AC power is randomly

missing at nominal input

The power supply shall not produce audible noise that

would be detectable by the user. Audible shall defined

to be in compliance with ISO 7779 (DIN EN27779:1991)

Noise measurements of machines acoustics. Power

Switch noise shall not be considered

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

US Type Power Cable

1.8m. Connects to display.

Color = Black

Schuko CEE7-7 type plug.

European Type Power Cable

Length = 1.8m, Connects to display.

Color = Black

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Separate 3-prong type plug.

CCC Type Power Cable

Length = 1.8m. Connects to display.

Color = Black

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

PSE Type Power Cable

1.8m. Connects to display.

Color = Black

VESA DPMS Signaling

Power Saving Operation(Method)

ON Mode < 40 W (Max) / 35 W (Typ)

On Mode < 40 W (Max) / 35 W (Typ)

Power Consumption

Saving Mode < 2 W, Off Mode < 1 W

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

z ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency 30 – 82 KHZ

Vertical Refresh Rate 50 – 75 HZ

Maximum Pixel Clock 135 MHz

Sync Polarity Independent of sync polarity.

z Timing Table

Item Timing Analog Digital

1 640 x 350 @ 70Hz, 31.5kHz Yes Yes

2 640 x 400 @ 60Hz, 31.5kHz Yes Yes

3 640 x 400 @ 70Hz, 31.5kHz Yes Yes

4 640 x 480 @ 50Hz, 24.7kHz Yes No

5 640 x 480 @ 60Hz, 31.5kHz Yes Yes

6 640 x 480 @ 67Hz, 35.0kHz Yes Yes

7 640 x 480 @ 72Hz, 37.9kHz Yes Yes

8 640 x 480 @ 75Hz, 37.5kHz Yes Yes

9 640 x 480 @ 85Hz, 43.27kHz No No

10 720 x 400 @ 70Hz, 31.5kHz Yes Yes

11 800 x 600 @ 56Hz, 35.1kHz Yes Yes

12 800 x 600 @ 60Hz, 37.9kHz Yes Yes

13 800 x 600 @ 75Hz, 46.9kHz Yes Yes

14 800 x 600 @ 72Hz, 48.1kHz Yes Yes

15 800 x 600 @ 85Hz, 53.7kHz No No

16 832 x 624 @ 75Hz, 49.7kHz Yes Yes

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17 1024 x 768 @ 60Hz, 48.4kHz Yes Yes

18 1024 x 768 @ 70Hz, 56.5kHz Yes Yes

19 1024 x 768 @ 72Hz, 58.1kHz Yes Yes

20 1024 x 768 @ 75Hz, 60.0kHz Yes Yes

21 1024 x 768 @ 85Hz, 68.67kHz No No

22 1152 x 864 @ 75Hz, 67.5kHz Yes Yes

23 1152 x 870 @ 75Hz, 68.7kHz Yes Yes

24 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes

25 1280 x 1024 @ 75Hz, 79.97kHz Yes Yes

26 1280x 720 @ 60Hz, 45kHz (HDTV) Yes Yes

z Primary Presets

1280x1024 @ 60Hz

z User Presets

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

z Changing Modes

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

- Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when execute “Auto 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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z TFT LCD PANEL

Source Panel

Model number AUO M190EN04 V5

Type TN type with LVDS interface

Active Size 376.32 (H) x 301.06 (V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.294 mm

GLASS TREATMENT Anti Glare (Hard coating 3H)

# OF BACKLIGHTS 4 CCFL edge-light (2 top / 2 bottom)

BACKLIGHT LIFE 50,000 Hours (Min)

Luminance (5-point) –

Condition:

275 cd/m2 (Typ after 30 minute warm up)

215 cd/m2 (Min after 30 minute warm up)

CT = 6500K, Contrast = Max, Brightness = Max

Brightness Uniformity

≧70% Entire Area (min)

Contrast Ratio 550:1 (typ), 350:1 (min)

Color Depth 16.2 million colors (6 bits + 2 bits FRC)

Viewing Angle (Horizontal) @ CR>10

Typical: 140º

Minimum: 130º

Viewing Angle (Vertical) @ CR>10

Typical: 135º

Minimum: 125º

Total = 4.8ms (black – white)

Response Time

10%-90% @ Ta=25°C

(Tr=3.4ms, Tf=1.4ms)

Total = 4.0ms (gray – gray)

Panel Defects Please see Panel Quality Specifications.

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z MECHANICAL

Dimension (Desktop)

Width 431 mm (17 inch)

Height 468 mm (18.4 inch)

Depth 201 mm (7.9 inch)

Monitor Weight 6.7 Kg (14.8 lbs)

z Dimension (Head Only / Wall Mount)

Width 431 mm (17 inch)

Height 370 mm (14.6 inch)

Depth 66 mm (2.6 inch)

Monitor Weight 5.3 Kg (11.7 lbs)

z Ergonomics

Tilt Up From 0º up to 20º≧

Tilt Down From 0º down to -3º ~ -5 º

z ENVIRONMENTAL

- Operating Temperature : 0°C to +40°C

- Storage Temperature : -20°C to +60°C

- Operating Relative Humidity : 20% to 90% RH Non-Condensing

- Storage Relative Humidity : 5% to 90% RH Non-Condensing

- Operating Altitude : 0 to +3,000 meters

- Storage Altitude : 0 to +12,000 meters

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3. Front Panel Function Control Description

Adjusting the Screen Image

Use the buttons on the front control panel to display and adjust the OSD controls which display on the screen. The OSD controls are explained at the top of the next page and are defined in

“Main Menu Controls” on page 13.

Main Menu

with OSD controls

Front Control Panel

shown below in detail

Displays the Main

Menu or exits the

control screen

and saves

adjustments.

Scrolls through menu options and adjusts the displayed control.

Also a shortcut to display the Contrast adjustment control screen.

Displays the control screen for the highlighted control.

Also toggles between two controls on some screens.

Also a shortcut to toggle analog and digital connection.

Power light Green = ON Orange = Power Saving

Power On/Off

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Do the following to adjust the display setting:

1. To display the Main Menu, press button [1].

NOTE: All OSD menus and adjustment screens disappear automatically after about 30

seconds. This is adjustable through the OSD timeout setting in the setup menu.

2. To select a setting to be adjusted, pressSorTto scroll up or down the Main Menu.

3. After the desired control is selected, press button [2]. A control screen like the one shown

below appears.

The line at the bottom of the screen tells you what you can do next: Exit or select the Brightness control.

4. To adjust the setting, press the upSor downTbuttons.

5. To save the adjustments and exit the menu, press button [1] twice.

The following tips may help you optimize your display:

• Adjust your computer's graphics card so that it outputs a 1280 x 1024 @ 60Hz video signal to the LCD display. (Look for instructions on “changing the refresh rate” in your graphic card's user guide.)

• If necessary, make small adjustments using H. POSITION and V. POSITION until the screen image is completely visible. (The black border around the edge of the screen should barely touch the illuminated “active area” of the LCD display.)

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Main Menu Controls

Adjust the menu items shown below by using the upSand downTbuttons.

Control Explanation

Auto Image Adjust automatically sizes, centers, and fine tunes the video signal to eliminate waviness and distortion.

NOTE:

1. Auto Image Adjust works with most common video cards. If this function

does not work on your LCD display, then lower the video refresh rate to 60 Hz and set the resolution to its pre-set value.

2. The Auto Image Adjust and most Manual Image Adjust functions are not available for DVI input.

Contrast adjusts the difference between the image background (black level) and the foreground (white level).

Brightness adjusts background black level of the screen image.

Input Select allows you to toggle between an analog and a digital signal.

Color Adjust provides several color adjustment modes: preset color

temperatures and User Color which allows you to adjust red (R), green (G), and blue (B) separately. The factory setting for this product is 6500K (6500 Kelvin).

sRGB-sRGB is quickly becoming the industry standard for color management, with support being included in many of the latest applications. Enabling this setting allows the LCD display to more accurately display colors the way they were originally intended. Enabling the sRGB setting will cause the Contrast and Brightness adjustments to be disabled.

9300K-Adds blue to the screen image for cooler white (used in most office settings with fluorescent lighting).

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Control Explanation

6500K-Adds red to the screen image for warmer white and richer red.

5400K-Adds green to the screen image for a darker color.

User Color Individual adjustments for red (R), green (G), and blue (B).

1. To select color (R, G or B) press button [2].

2. To adjust selected color, pressSorT.

Important: If you select RECALL from the Main Menu when the product is set

to a Preset Timing Mode, colors return to the 6500K factory preset.

Information displays the timing mode (video signal input) coming from the graphics card in your computer, the LCD model number, the serial number, and the ViewSonic® website URL. See your graphics card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency).

NOTE: VESA 1280 x 1024 @ 60Hz (recommended) means that the resolution is 1280 x 1024 and the refresh rate is 60 Hertz.

Manual Image Adjust displays the Manual Image Adjust menu.

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Control Explanation

The Manual Image Adjust controls are explained below:

H./V. Position (Horizontal/Vertical Position) moves the screen image left or

right and up or down.

H. Size (Horizontal Size) adjusts the width of the screen image.

Fine Tune sharpens the focus by aligning the text and/or graphic characters.

Sharpness adjusts the clarity and focus of the screen image.

Setup menu displays the menu shown below:

The Setup Menu controls are explained below:

Language allows you to choose the language used in the menus and control

screens.

Resolution Notice displays the Resolution Notice menu shown below.

Resolution Notice advises the optimal resolution to use.

OSD Position allows you to move the on-screen display menus and control

screens.

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Control Explanation

OSD Timeout sets the length of time the on-screen display screen is displayed. For example, with a “15 second” setting, if a control is not pushed within 15 seconds, the display screen disappears.

OSD Background allows you to turn the On-Screen Display background On or Off.

Memory Recall returns the adjustments back to factory settings if the display is operating in a factory Preset Timing Mode listed in the Specifications of this manual.

Exception: This control does not affect changes made with the User Color control, Language or Power Lock setting.

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4. Circuit Description

1. Outline

1.1 Buttons on the front panel: Power On/Off button, button 2 (ENTER / INPUT SELECT), up arrow

button, down arrow button, button 1 (MENU).

The D-sub 15-pin connector, DVI-I connector and AC-IN jack are located on the back side of the cabinet.

1.2

1.3 The OSD menu includes the following functions:

Auto Image Adjust (only active under analog input) Contrast/Brightness Audio Adjust Color Adjust Information Manual Image Adjust Setup Menu Memory Recall

Contrast and Brightness can be directly controlled with the UP / DOWN buttons.

1.4

2. Connectors

AC Socket: CEE22 type connector

2.1

2.2 Video signal connector for analog input: 15P Mini D-Sub

CN6

DB15HD

PIN MNEMONIC SIGNAL 1 RV Red Video 2 GV Green Video 3 BV Blue Video 4 NC None 5 GND Ground(DDC return) 6 RG Red GND 7 GG Green GND 8 BG Blue GND 9 +5V +5V (for DDC) 10 SG Sync GND 11 NC None 12 SDA DDC Data 13 HS Horizontal Sync 14 VS Vertical Sync 15 SCL DDC Clock

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2.3

Video signal connector for digital input: 24pin DVI-D connector

CN9

RX2-

RX2+

GND

RX4-

RX4+

SCL

SDA

RX1-

RX1+

GND

RX3-

RX3+

GND

RX0-

RX0+

GND

RX5-

RX5+

GND

RXC+

RXC-

3. Electrical Specifications

DVI-D

3.1 Standard conditions

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 RX4- Reserved. No connection 5 RX4+ Reserved. No connection 6 SCL DDC2B Clock 7 SDA DDC2B Data 8 VS Reserved. No connection

9 RX1- TMDS negative differential input, channel 1 10 RX1+ TMDS positive differential input, channel 1 11 GND Logic Ground 12 RX3- Reserved. No connection 13 RX3+ Reserved. No connection 14 +5V Power 15 GND Logic Ground 16 HP SENSE Pin, Pull High 17 RX0- TMDS negative differential input, channel 0 18 RX0+ TMDS positive differential input, channel 0 19 GND Logic Ground 20 RX5- Reserved. No connection 21 RX5+ Reserved. No connection 22 GND Logic Ground 23 RXC+ TMDS positive differential input, reference clock 24 RXC- TMDS negative differential input, reference clock

Display Area Video Signal Contrast Brightness Ambient Input Warming up Display

404.2 x 330.0 mm

0.7Vpp

Max.

Max. 20 +/- 5 °C

> 30 min

1280 x 1024

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3.2 Power

3.2.1 Power supply

Input voltage 100~240Vac Power frequency 50~60Hz

Input current Inrush current

Power consumption 35W(typical);40Watts(Max)

3.2.2 Power Management

State Power Indicator

On 35Watts Green Standby < 1Watts Amber Off <1Watts Off

<1.5A RMS @90V AC

<0.8A RMS @180V AC

50A(Max) at 120Vac(cold start)

3.3 Acceptable timing

This LCD display can automatically detect and display input signals whose timing falls within the

following limits.

Horizontal: Sync frequency: 30~82 kHz Vertical: Sync frequency: 56~75Hz

3.4 Signal level and input impedance

3.4.1 Video signal level: 0.7Vp-p

3.4.2 Sync signal level - H/V separate: TTL level

3.4.3 Input impedance

Analog video input: 75 ohm Digital video input: 100 ohm Sync input: > 1 k ohm Audio input: 10K ohm

4. Signal Cable: Signal cable with Mini D-Sub 15P connectors at both ends. Length: 1.8 meter.

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5. EDID data

AUO

Analog EDID

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 | 1C 0F 01 01 01 01 01 0F 01 03

20 | 0E 26 1E 78 2E 68 75 A2 5A 49

30 | 9F 23 13 50 54 BF EF 80 81 80

40 | 71 4F 61 59 45 59 31 59 01 01

50 | 01 01 01 01 30 2A 00 98 51 00

60 | 2A 40 30 70 13 00 78 2D 11 00

70 | 00 1E 00 00 00 FF 00 50 53 33

80 | 30 35 30 31 30 30 30 30 31 0A

90 | 00 00 00 FD 00 32 55 1E 52 0E

100 | 00 0A 20 20 20 20 20 20 00 00

110 | 00 FC 00 56 58 39 32 34 0A 20

120 | 20 20 20 20 20 20 00 D3 __________ _______________________________________

(08-09) ID Manufacturer Name = VSC (11-10) P roduct ID Code = 0F1C (12-15) Last 5 Digits of Serial Number = Not Used (16) Week of Manufacture = 01 (17) Year of Manufacture = 2005 (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 = 380 mm (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 - 0.634 Green X - 0.287 Blue X - 0.138 White X - 0.313

Red Y - 0.354 Green Y - 0.621 Blue Y - 0.077 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)

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(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:

1280 X 1024 @60Hz

1152 X 864 @75Hz

1024 X 768 @85Hz

800 X 600 @85Hz

640 X 480 @85Hz

Not Used

Not Used ______________________________________________________________________

(54-71) Detailed Timing / Descriptor Block 1:

______________________________________________________________________

Horizontal:

Vertical:

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

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

Monitor Serial Number:

PS3050100001 ______________________________________________________________________

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

______________________________________________________________________

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

Monitor Name:

(126) No Extension EDID Block(s)

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(127) CheckSum OK

1280x1024 Pixel Clock: 108.00 MHz

Horizontal Image Size: 376 mm Vertical Image Size: 301 mm

Refreshed Mode: Non-Interlaced Normal Display - No Stereo

Active Time: 1280 pixels Blanking Time: 408 pixels

Sync Offset: 48 pixels Sync Pulse Width: 112 pixels

Border: 0 pixels Frequency: 63.98 KHz

Active Time: 1024 lines Blanking Time: 42 lines

Sync Offset: 1 lines Sync Pulse Width: 3 lines

Border: 0 lines Frequency: 60.02 Hz

Monitor Range Limits:

Min Vertical Freq - 50 Hz

Max Vertical Freq - 85 Hz

Min Horiz. Freq - 30 KHz

Max Horiz. Freq - 82 KHz

Pixel Clock - 140 MHz

Secondary GTF - Not Supported

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Digital EDID

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 | 1C 0F 01 01 01 01 01 0F 01 03

20 | 80 26 1E 78 2E 68 75 A2 5A 49

30 | 9F 23 13 50 54 BF EF 80 81 80

40 | 71 4F 61 59 45 59 31 59 31 0A

50 | 01 01 01 01 30 2A 00 98 51 00

60 | 2A 40 30 70 13 00 78 2D 11 00

70 | 00 1E 00 00 00 FF 00 50 53 33

80 | 30 35 30 31 30 30 30 30 31 0A

90 | 00 00 00 FD 00 32 55 1E 52 0E

100 | 00 0A 20 20 20 20 20 20 00 00

110 | 00 FC 00 56 58 39 32 34 0A 20

120 | 20 20 20 20 20 20 00 28

_________________________________________________

(08-09) ID Manufacturer Name = VSC (11-10) Product ID Code = 0F1C (12-15) Last 5 Digits of Serial Number = Not Used (16) Week of Manufacture = 01 (17) Year of Manufacture = 2005 (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 = 380 mm

(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 - 0.634 Green X - 0.287 Blue X - 0.138 White X - 0.313

Red Y - 0.354 Green Y - 0.621 Blue Y - 0.077 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)

ViewSonic Corporation Confidential

Do Not Copy VX924

+ 57 hidden pages

Viewsonic VX924-1 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual