ViewSonic Va1912wb 3 Service Manual

 8 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
Remark : All the short cuts function are only available while OSD off 
Main Menu Controls 
Auto Image Adjust *
1  
Contrast/Brightness *
2*4 
Input Select  Analog, Digital 
Audio Adjust  Vo l u m e *
4, Mute*4 
Color Adjust    sRGB, 9300K, 6500K(default), 5400, 5000, User Color [R, G, B] 
     Information   
        H Frequency, V Frequency, Resolution, Pixel Clock, Serial Number,  
Model Number, “www.ViewSonic.com
”...

 9 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
after a power failure. The power button lo ck 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...

 10 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
3. Front Panel Function Control Description 
Adjusting the Screen Image 
 
Use the buttons on the front control panel to disp lay 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 10.
Main Menu
with OSD controls
Front Control Panel
shown below in detail
Scrolls through menu options and 
adjusts the...

 11 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
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 th e OSD timeout setting in the setup menu.
2. To select a control to adjust, press SorT to scroll up or down in the Main Menu.
3. After the desired control is se lected, press button [2]. A control screen...

 12 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
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...

 13 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
Control Explanation
9300K- 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.
5000K- Adds blue and 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,...

 14 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
Control Explanation
H. Size (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.
Setup Menu  displays the menu shown below:
Language...

 15 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
Control Explanation
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 1440 x 900, 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 contro...

 16 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
4. Circuit Description 
The TSUM57AK is total solution graphics processing IC for  LCD monitors with panel resolutions up to SXGA. It is 
configured with a high-speed integrated triple-ADC/PLL, an integrated DVI receiver,  a high quality display processing engine, 
and an integrated output display interface that can support RSDS panel interf ace format. To further reduce system costs, the 
TSUM57AK also integrates...

 17 
ViewSonic Corporation 
    Confidential - Do Not Copy     VA1912w-3_VA1912wb-3 
5. Adjustment Procedure 
A. Function Test and Alignment Procedure 
1. All Modes Reset 
You should do “All Model Reset” (Refer to Chap 3. Hot Ke ys for Function Controls) first. This action will allow 
you to erase all end-user’s settings and restore the factory defaults. 
  2. Auto  Image Adjust   The Auto Adjust is aimed to offer a  best screen quality by built-in ASIC.  For optimum screen quality, the user 
has to...