Viewsonic VX2435W Service Manual

Service Manual

ViewSonic VX2435wm-1

Model No. VS11449

24” Color TFT LCD Display

(VX2435wm-1_SM Rev. 1a Mar. 2007)

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

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. Pleas e dispose of in accordance with local, state or federal laws.

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 3/29/2007 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 16

4. Circuit Description 23

5. Adjusting Procedure 28

6. Trouble Shooting Flow Chart 50

7. Block Diagrams 58

8. Schematic Diagrams 59

9. PCB Layout Diagrams 75

10. Exploded Diagram And Spare Parts List 76

11. Recommended Spare Parts List 78

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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.

(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

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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 .

Surface of the panel is pressed by fingers & this may

cause “ MURA “

Take out the monitor Take out the monitor by grasping the LCD panel.

That may cause “ MURA“.

Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .

That could scratch the surface of panel

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2. Specification

Product definition and specification

Product Name ViewSonic VX2435wm

Oracle P/N VX2435WM

Model Number VS11449

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

OSD Languages

TFT LCD Panel and Model # CMO A240J1

Scalar MST 6251DA

Input Signal D-Sub / HDMI / YPbPr / CVBS / S-Video

Sync Compatibility Separate Sync / Composite Sync / SOG

Windows Vista Premium Certified(x86/x64) Yes

Adapter Internal Power Board

Russian,Japanese, Traditional Chinese, Simplified Chinese

Power Cable

Analog Cable (1.8 m, black), with PC 2001 and Hot Plug

Detect &DDC

HDMI to DVI-D Cable(1.8m, black) with PC 2001

Audio Cable(1.8m, black) with PC 2001 Yes

AV Cable (1.8m ; Yellow/Red/White) No

Component Cable (1.8m ; Green/Red/Blue) No

MIC Cable(1.8m, black) with PC 2001 No

USB Cable (V2.0) No

ViewSonic CD Wizard

ViewSonic Quick Start Guide

PerfectSuite CD No

Ye s,

Refer to APPENDIX B: Power Cable

Yes

(Detached cable; refer the Appendix A)

Ye s

(Refer the Appendix A)

Arabic, English, Finnish, Spanish, German, Italian, Japanese,

Swedish, Polish, Korean Portuguese, Russian, French,

Simplified Chinese,Traditional Chinese,Czech, Turkish

Hungarian ,Greek , Dutch

Extrme Label (5ms) No

Screen Protector Mylar Yes

Foot Protector plastic Yes, for left-front and right-front foot

Service Insert For Region code = M units only

Warranty Sticker For Region code = G units only

Warranty Card For Region code = G units only

Carton Sticker For Region code = G units only

PE bag of Carton For Region code = G units only

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2-1 GENERAL specification

Test Resolution & Frequency 1920x1200 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls

Factory Default:

Contrast = 70%, Brightness = 100%

2-2 VIDEO INTERFACE

Input Connector (refer the Appendix A) Analog = DB-15

Digital Input Connector HDMI, 19pin Type A

Video Input 1 RCA jack (Red, Blue, Green) for YPbPr

Video Input 2 RCA jack (Yellow) for CVBS

Video Input 3 S_TERMINAL for S-Video

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 Pin out Compliant DDC 1/2B/CI(Refer to Appendix A)

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

Video Signals (Impedance / Amplitude )

S Video (75 ohms,Y : 1.0Vp-p W / Neg. Sync ;C : 0.285Vp-p)

YPbPr(75 ohms,Y:1.0Vp-p ; Pb:0.7 Vp-p,Pr:0.7 Vp-p )

HDMI(TMDS, 100ohms)

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 1/2B/CI Compliant with version 1.3

HDCP HDCP code inside and compatible

Sync Compatibility Separate Sync / Composite Sync / SOG

Video Compatibility

Video timing support

(CVBS / S-Video)

Video timing support

(HDMI / YPbPr)

720p @ 50/60Hz 1080i / 1080p @ 50/60Hz

Shall be compatible with all PC type computers, Macintosh computers,

and after market video cards

480I@50/60Hz

480i / 480p @ 50/60Hz 576i / 576p @ 50/60Hz

640x350 640x400 640x480 720x400

720x480 800x600 832x624 1024x768

1152x864 1152x870 1280x720 1280x768

Resolution Compatibility

Exclusions Not compatible with interlaced video

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1280x960 1280x1024 1360x768 1400x1050

1440x900 1600x1200 1680x1050 1920x1200

The image vertical size might not be full screen.

But the image vertical position should be at the center.

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Audio / Video Action

Video input

CVBS S-Video YPbPr D-sub DVI-D via HDMI HDMI

RCA (white + red) with

CVBS/S-Video

RCA (white + red) with

Audio input

YPbPr

3.5mm phone jack X X X

Audio in HDMI X X X X X

Video OVERCAN

Component over scan: 5~8%

AV over scan: 5~8%

HDMI over scan: No over scan for PC input, 5~8% for video source.

PC: No over scan

● ●

X X

2-3 USB INTERFACE

No USB interface

X X X X

●

X X X

● ●

●

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2-4 POWER SUPPLY

Internal Power Supply Delta DAC-24M001/ APD FP-120A01

Input Voltage Range 90 to 264 VAC

Input Frequency Range 47 to 63 Hertz

Short Circuit Protection Output can be shorted without damage

Over Current Protection Meet LPS(Limit Power Switch)

Leakage Current 3.5mA (Max) at 254VAC / 60Hz

Efficiency (at 115VAC Full Load) Typical: 80%

Minimum: 75%

Fuse Internal and not user replaceable

Power Output 110 Watts (typ)

Ripple and Noise

Max Input AC Current 1.6 Arms @ 90VAC, 1.6 Arms @180VAC

Inrush Current (Cold Start)

Power Supply Cold Start

Power Supply Transient Immunity

Power Supply Line Surge Immunity

Power Supply Missing Cycle Immunity

Ripple: <3%

Noise: <1%

100 A (max) @ 115VAC

100 A (max) @ 230VAC

Shall start and function properly when under full load, with all

combinations of input voltage, input frequency, and operating

temperature.

Shall be able to withstand an ANSI/IEEE C62.41-1980 6000V 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

Power Supply Acoustics

Power Saving Operation(Method) VESA DPMS Signaling

Power Consumption

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

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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.

Mode LED Power Consumption

On Blue 110 W (typ)

Active off Amber <2W

Off Off <1W

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120 W (max)

2-5 ELECTRICAL REQUIREMENT

–

Horizontal / Vertical Frequency

Horizontal Frequency 24 – 82 kHz

Vertical Refresh Rate 50 – 85* Hz

Maximum Pixel Clock 165 MHz

Sync Polarity Independent of sync polarity

Timing Table

Item

Timing

1 640 x 350 @ 70 Hz, 31.5 KHz

2 640 x 350 @ 85 Hz, 37.9 KHz

3 640 x 400 @ 60 Hz, 31.5 KHz

4 640 x 400 @ 70 Hz, 31.5 KHz

5 640 x 400 @ 85 Hz, 37.9 KHz

6 640 x 480 @ 50 Hz, 24.7 KHz

7 640 x 480 @ 60 Hz, 31.5 KHz

8 640 x 480 @ 67 Hz, 35 KHz

9 640 x 480 @ 72 Hz, 37.9 KHz

10 640 x 480 @ 75 Hz, 37.5 KHz

11 640 x 480 @ 85 Hz, 43.3 KHz

12 720 x 400 @ 70 Hz, 31.5 KHz

Analog

Composite

Separated

   

  

   

TMDS/HDMI

SOG

Digital

Remark

13 720 x 400 @ 85 Hz, 37.9 KHz

14 720 x 480 @ 60 Hz, 31.5 KHz

15 720 x 576 @ 50 Hz, 31.3 KHz

16 800 x 600 @ 56 Hz, 35.1 KHz

17 800 x 600 @ 60 Hz, 37.9 KHz

18 800 x 600 @ 72 Hz, 48.1 KHz

19 800 x 600 @ 75 Hz, 46.9 KHz

20 800 x 600 @ 85 Hz, 53.7 KHz

21 832 x 624 @ 75 Hz, 49.7 KHz

22 1024 x 768 @ 50 Hz, 39.6 KHz

23 1024 x 768 @ 60 Hz, 48.4 KHz

24 1024 x 768 @ 70 Hz, 56.5 KHz

25 1024 x 768 @ 75 Hz, 60 KHz

26 1024 x 768 @ 75 Hz, 60.2 KHz

27 1024 x 768 @ 85 Hz, 68.7 KHz

28 1152 x 864 @ 75 Hz, 67.5 KHz

   

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29 1152 x 870 @ 75 Hz, 68.7 KHz

   

30 1280 x 720 @ 50 Hz, 37.5 KHz

31 1280 x 768 @ 50 Hz, 39.6 KHz

32 1280 x 768 @ 60 Hz, 47.4 KHz

33 1280 x 768 @ 60 Hz, 47.8 KHz

34 1280 x 768 @ 75 Hz, 60.3 KHz

35 1280 x 768 @ 85 Hz, 68.6 KHz

36 1280 x 960 @ 50 Hz, 49.4 KHz

37 1280 x 960 @ 60 Hz, 59.7 KHz

38 1280 x 960 @ 75 Hz, 75.2 KHz

39 1280 x 1024 @ 50 Hz, 52.7 KHz

40 1280 x 1024 @ 60 Hz, 64 KHz

41 1280 x 1024 @ 70 Hz, 74.6 KHz

42 1280 x 1024 @ 72 Hz, 76.8 KHz

43 1280 x 1024 @ 75 Hz, 80 KHz

44 1360 x 768 @ 60 Hz, 47.7 KHz

45 1400 x 1050 @ 50 Hz, 54.1 KHz

 

   



   

46 1400 x 1050 @ 60 Hz, 64.7 KHz

47 1400 x 1050 @ 60 Hz, 65.3 KHz

48 1400 x 1050 @ 75 Hz, 82.3 KHz

49 1440 x 900 @ 60 Hz, 55.5 KHz

50 1440 x 900 @ 60 Hz, 59.9 KHz

51 1440 x 900 @ 75 Hz, 75 KHz

52 1600 x 1200 @ 60 Hz, 75 KHz

53 1680 x 1050 @ 60 Hz, 65.3 KHz

54 1920 x 1080 @ 50 Hz, 28.1 KHz

55 1920 x 1080 @ 60 Hz, 33.8 KHz

   

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For Video Source Only

Item

Timing

Separated

Analog

Composite

SOG

HDMI

YPbPr

CVBS

S-Video

Remark

1 480p @ 50 Hz

2 480p @ 60 Hz

3 480i @ 50 Hz

4 480i @ 60 Hz

5 576i @ 50 Hz

6 576i @ 60 Hz

7 576p @ 50 Hz

8 576p @ 60 Hz

9 720p @ 50 Hz

10 720p @ 60 Hz

11 1080i @ 50 Hz

12 1080i @ 60 Hz

*1. Tolerance ≧ ±2KHz.

*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message without blanking.

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

X X X

 

   

 

X X

Primary Presets

1920x1200 @ 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 : 5 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 a new mode is detected (see section “0-Touch™ Function

Actions”)

 While running Change Mode, Auto Adjust or Memory Recall, the image shall blank

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2-6 FRONT PANEL CONTROLS AND INDICATORS

Front Panel Hardware Controls

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

Power LED (Front Head) Blue– ON

Orange – Active Off

Dark = Soft Power Switch OFF

Front Panel Controls (Head)

[ 1 ] [ 2 ] [

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 or Digital)

[▼] To immediately activate Brightness/Contrast menu.

[▼] +[▲] Recall both of Contrast and Brightness to default

] [▲] [▼]

[ 1 ] Button 1

[ 2 ] Button 2

[

] Power

[▲] Up arrow button

[▼] Down arrow button

Note: Power Button, Button 1 and Button 2 must be one-shot logic

operation. (i.e. there should be no cycling)

[1] + [2] Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode

[1] + [▼] + [▲]

(Keep pushing 3 sec)

[1] + [▼] Power Lock

[1] + [▲] OSD Lock

[▲] Essential mode switch

[2] + [▲] Skin tone switch

[2] + [▼] DDC/CI ON/Off (ON:DDC/CI ; Off:DDC/2B)

No signal + [ ] + [▼] + [▲] Burning mode

Signal + [ ] + [▼] + [▲] Factory Mode

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

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

Standard ->Text -> Cinema -> Game -> Portrait -> Scenery -> Vivid

Nature -> Reddish -> yellowish

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Main Menu Controls

Auto Image Adjust*1

Contrast/Brightness*2*4

Input Select

D-Sub , AV , S-Video , YPbPr , HDMI

Audio Adjust

Volume*4, Mute*4 ,Bass, Treble , Balance

Color Adjust

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

Information

[H Frequency, V Frequency, Resolution, Pixel Clock,(Video format), Serial Number, Model Number,

[“www.ViewSonic.com

Manual Image Adjust

Horizontal Size*1, H/V. Position*1, Fine Tune*1, Sharpness*3 , Tint*5 , Color*5 , Aspect ratio [1:1 , 4:3 , 16:9 , Full

Screen] , Opticolor [Standard, Text , Cinema, Game, Portrait, Scenery, Vivid ], Opticolor Skin Tone[Nature,

reddish ,yellowish] ,

Setup Menu

Language [English, French, German, Italian, Spanish, Finnish, Japanese,Russian ,Simplified Chinese, Traditional Chinese],

Resolution Notice, OSD Position, OSD Timeout, OSD Background , Sleep [30,45,60,120, Off] *5

Memory Recall

*1 These functions are not available in Digital Mode

*2 These functions are not available under SRGB Mode, Opticolor On, and Opticolor Skin Tone On

*3 These functions are not available under Native Resolution Mode

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

*5 These functions are not available in D-Sub Mode

*6 These functions are not available in 720p/1080i timing Mode

*7 DLC function always “ON”

” ]

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

Function descriptions

Main Menu Controls

The Main Menu OSD includes most of control functions.

Please refer to APPENDIX C (Main Menu OSD Table) for the detail.

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”

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Note 2: Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD Locked”

Note 3: 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 "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. Recall white balance to factory setting

2. Set the factory defaults as shown in Section 4-8

3. Clean all the mode setting buffer

4. Execute Auto Image Adjust

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

Input Signal Notice Actions

The Input Signal Notice OSD appears 3 seconds when power turns on or change input signal.

The Input Signal Notice OSD position is on the right-top side of image. And the OSD background setting shall be turn on.

Resolution Notice Actions

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

For auto input select function, it shall meet the requirement in Appendix D.

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

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Factory Defaults (PC Mode:D-SUB/DVI)

Item Defaults Item Defaults

Contrast 70% Input Priority Auto Search

Brightness 100% Resolution Notice Enabled

Color Temperature 6500K Volume 50 % @1W

Sharpness 100% Balance 50 %(Start point)

OSD H. Position 50% Treble 50 %

OSD V. Position 50% Bass 50 %

OSD Time Out 15 Sec

OSD Background Enabled

Factory Defaults (Video source Mode:Video/S-Video/HDMI)

Item Defaults Item Defaults

Contrast 70% Input Priority Auto Search

Brightness 100% Resolution Notice Enabled

Color Temperature 9300K Volume 50 % @1W

Sharpness 100% Balance 50 %(Start point)

OSD H. Position 50% Treble 50 %

OSD V. Position 50% Bass 50 %

OSD Time Out 15 Sec

OSD Background Enabled

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2-7 AUDIO INTERFACE (SPEAKER SPECIFICATION)

Speaker specification Audio input 1 3.5Mini Jack for PC Audio and HDMI bypass connector Audio input 2 RCA jack (White / Red) x 1 for YPbPr

Audio input 3

Line input signal 1.0 Vrms Line input impedance 10 kOhm Maximum power output (Electric) 3W (RL=8Ω) Signal to Noise Ratio 85dB SPL. 85 dB +/- 3dB Frequency response 100 Hz – 20 Khz Distortion < 10 % THD (Vol. max @1kHz)

Vibration

Screen image

Connector PC99 requirement Audio in Lime Green pantone # 577C

Cable type / length

Audio DPMS Speakers should be off when the rest of the monitor is in power saving.

* No any sympathetic or abnormal noise allowed.

RCA jack (White / Red) x 1 for CVBS / S-Video ***CVBS and S-Video will share the same RCA jack

There should be no audible vibration with volume at 100% and treble / bass at default. There should be no affect on the screen image stability under any conditions.

Input 1: 3.5mm stereo cable / 1.8m Input 2: RCA stereo cable / 1.8m Input 3: RCA stereo cable / 1.8m

2-8 TFT LCD PANEL

1st Source Panel

Model number CMO A240J1 Type Active Matrix TFT, TN technology Active Size 24” Wide Pixel Arrangement RGB Vertical Stripe Pixel Pitch 0.270 mm Glass Treatment Anti-Glare, Hard coating (3H) # of Backlights 6 CCFL Backlight Life 50000 Hrs (Typ)

40000 Hrs (Min)

500 cd/m2 (Typ after 30 minute warm up) Luminance (Center) – CT = 6500K, Contrast/ Brightness = Max Brightness Uniformity 77 % (Typ) / 67 % (Min) Contrast Ratio 1000 :1 (Typ) 700 : 1 (Min) Color Depth 16.7 million colors (8bits) Horizontal Viewing Angle 176 degrees (Typ) Vertical Viewing Angle 176 degrees (Typ) Response Time GTG 10%-90% @ Ta=25°C 8ms (Typ) / 13ms (Max) Mercury 3.0 mg per lamp Panel Defects Please see Panel Quality Specifications.

*The average of measured value from monthly shipment shall be equal or better than the Typical value above.

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

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3. Front Panel Function Control Description

Adjusting the Screen Image

Main Menu

with OSD controls

Front Control Panel

shown below in detail

Displays the control screen for

the highlighted control.

Also toggles between two

controls on some screens.

Also a shortcut to Auto Image

Adjust.

Displays the Main

Menu or exits the

control screen and

saves adjustments.

Standby Power On/Off Power light Blue = ON Orange = Power Saving

Scrolls through menu options and adjusts the displayed control.

Also a shortcut to display the Contrast/Brightness adjustment control screen (T) / OptiColor (S)

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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 15

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

2. To select a control to adjust, pressSorTto scroll up or down in the Main Menu.

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

below appears.

The command line at the bottom of the control screen tells what to do next from this screen. You can toggle between control screens, adjust the selected option, or exit the screen.

4. To adjust the setting, press the up S or down T buttons.

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

The following tips may help you optimize your display:

• Adjust the computer's graphics card so that it outputs a 1920 x 1200 @ 60Hz video signal to the LCD display. (Look for instructions on “changing the refresh rate” in the graphics 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 up S and down T buttons.

Control Explanation

Auto Image Adjust sizes and centers the screen image automatically.

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 toggles between inputs if you have more than one computer

connected to the VX2435wm. Note: Please press the power on/off key to restart monitor when changing the HDMI input device.

Audio Adjust Vol ume increases the volume, decreases the volume, and mutes the audio.

Tre ble Adjusts the treble level. Bass Adjusts the bass level. Balance Adjusts left and right audio balance.

Mute temporarily silences audio output.

Color Adjust provides several color adjustment modes, including preset color

temperatures and a User Color mode which allows independent adjustment of red (R), green (G), and blue (B). The factory setting for this product is 6500K (6500 Kelvin).

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Control Explanation

sRGB-This 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).

7500K - Adds blue to the screen image for cooler white (used in most office

settings with fluorescent lighting).

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, pressSandT.

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 the 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 1920 x 1200 @ 60Hz (recommended) means that the resolution is 1920 x 1200 and the refresh rate is 60 Hertz.

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Control Explanation

Manual Image Adjust

Horizontal Size adjusts the width of the screen image.

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

right and up or down.

Fine Tune sharpens the focus by aligning text and/or graphics with pixel boundaries.

NOTE: Try Auto Image Adjust first.

Sharpness adjusts the clarity and focus of the screen image.

Tint Adjusts the Hue level of image. (It's inactive in D-SUB mode only)

Colour Adjusts the saturation level of image. (It's inactive in D-SUB mode

only)

Aspect ratio Selects the image size for 1:1, 4:3, 16:9 & full screen.

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Control Explanation

OptiColor Mode provides an optimum display environment depending on the contents displayed. It contains 7 user-selectable presets. These 7 presets are easily accessible from the short cut keys.

Standard is for general windows environment and monitor default setting.

Tex t optimized for text editing and viewing in a word processing environment.

Cinema optimized for movie and video environment.

Game optimized for PC/TV game environment.

Portrait optimized for displaying indoor portraits and enhancing pictures.

Scenery optimized for displaying outdoor scenery images.

Vivid optimized for color luster and sharpness.

These 7 presets are carefully chosen by Viewsonic, but may not suit all users' tastes. In that case, the user can either return to the Standard setting and manually adjust the brightness and contrast as desired.

OptiColor Skin Tone includes 3 presets (Natural / Red Tone / Yellow Tone) which user can select according to user's preference.

Setup Menu displays the menu shown below:

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Control Explanation

Language Select allows the user to choose the language used in the menus and control screens.

Resolution Notice allows the user to enable or disable this notice.

If you enable the Resolution Notice shown above and your computer is set at a

resolution other than 1920 x 1200, the following screen appears.

OSD Position allows the user to move the OSD menus and control screens.

OSD Timeout sets the length of time the OSD screen is displayed. For example,

with a “30 second” setting, if a control is not pushed within 30 seconds, the display screen disappears.

OSD Background allows the user to turn the OSD background On or Off.

Sleep Set up the auto power off time for 30/45/60/120 minutes. (It's inactive in

D-SUB mode only)

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.

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4. Circuit Description

The MST6251DA is a high performance and fully integrated graphics processing IC solution for multi-function LCD monitor/TV with resolutions up to UXGA/WUXGA. It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a video de-interlacer, two high quality scaling engines, an on-screen display controller, and a built-in output clock generator. By use of external frame buffer, PIP is provided for multimedia applic ations. It supports de-interlaced full-screen video, video-on-graphic overlay, split screen, frame rate conversion, and aspec t ratio conversion for various video sources. To further reduce system costs, the MST6251DA also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.

Video Source

DVI/HDMI

YPbPr

D-Sub

Video

Decoder

DVI/HDMI

YPbPr

RGB

BT656

MST6251DA

32-bit data

DDR

SDRAM

LVDS

4-bit DDR Direct bus

MCU

Digital Audio

Panel

The MTV416M micro-controller is an 8051 CPU core embedded device targeted for LCD Monitor or LCD TV application. It includes an 8051 CPU core, a 128K-byte internal program Flash-ROM, a 768-byte SRAM, 4 channels of PWM DAC, 4 channels of 6-bit ADC, and a built-in sync-processor. It also includes two IIC Slave B ports, supporting VESA DDC/CI for both D-sub and DVI interfaces, and a Boot-Code-Free ISP (In System Programming).

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