ViewSonic Vp9303 Service Manual

							
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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 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 like the one shown 
below appears.
4. To adjust the setting, press the up Sor down Tbuttons.
5. To save the adjustments and exit the menu, press button [1]  twice.
The following tips may help you optimize your display: • Adjust the computers 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 the graphics
cards user guide.)
• If necessary, make small adjustments us ing 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 “acti ve area” of the LCD display.) 
						

							
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Main Menu Controls
Adjust the menu items shown below by using the up Sand downT buttons.
Control Explanation Auto Image Adjust  automatically sizes, centers,  and fine tunes the video signal
to eliminate waviness and distortion. Pr ess the [2] button to obtain a sharper
image.
NOTE:  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.
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 the user to toggle between an analog and a digital signal.
Color Adjust  provides several color adjustment modes, including preset color
temperatures and a User Color mode wh ich allows independent adjustment of
red (R), green (G), and blue (B). The factory setting for this product is 6500K
(6500 Kelvin).
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. 
						

							
Control Explanation
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.
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, G or B) press button [2].
2. To adjust selected color, press SorT .
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 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
H./V. Position (Horizontal/Vertical Position)  moves the screen image left or
right and up or down.
Horizontal Size  adjusts the width of the screen image.
Fine Tune  sharpens the focus by aligning text and/or graphics with pixel
boundaries.
Sharpness  adjusts the clarity and focus of the screen image.
Setup Menu  displays the menu shown below:
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.
Input Priority  If multiple computers will be connected to the display, this
function can be used to select which computer has priority depending on the
selected Input Priority, the display will do a one time detection for available
inputs when first powered on.
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 “15 second” setting, if a control is not pushed within 15
seconds, the display screen disappears.
OSD Background  allows the user to turn the OSD background On or Off.
OSD Pivot  This function is used to rotate the OSD menu, changing the OSD
screen to Landscape or Portrait mode.ViewSonic Corporation  Confidential - Do Not Copy  VP930-3_VP930b-3 
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 Control Explanation
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 Select or Power Lock setting.ViewSonic Corporation  Confidential - Do Not Copy  VP930-3_VP930b-3 
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4. Circuit Description 
Scaler: M-star TSUM66AJ 
 
GENERAL DESCRIPTION   
The TSUM66AJ is total solution graphics processi ng 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 LVDS panel 
interface format.   
To further reduce system costs, the TSUM66AJ  also integrates intelligent power management 
control capability   
for green-mode requirements and spread-spectrum support for EMI management.   
  
The TSUM66AJ incorporates the world’s first  coherent oversampled RGB graphics ADC in a 
monitor controller   
1 
system .    The oversampling ADC samples the input RGB signals at a frequency that is much 
higher than the   
signal source pixel rate.    This can preserve details in the video signal that ordinarily would be 
lost due to input   
signal jitter or bandwidth limitatio ns in non-oversampled systems.   
2 
The TSUM66AJ also incorporates a new Dynamic  Frame Rate (DFR) generator    for the digital 
output video to   
the display panel that preserves the advantages of a fixed output clock rate, while eliminating the 
output end of   
frame short-line.   
 
BLOCK DIAGRAM 
  
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