ViewSonic Vx2235wm4 Service Manual

3. Front Panel Function Control Description 
 
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Main Menu
with OSD controls
Front Control Panel
shown below in detail
Scrolls through menu 
options and adjusts the 
displayed control.
Also a shortcut to display 
the Contrast adjustment 
control screen (T) / 
OptiColor  ( S) 
Displays the control screen for
the highlighted control.
Also toggles between two
controls on some screens.
Also a shortcut to Auto Image Adjust.Standby Power...

 
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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, press SorT to scroll up or down in the Main Menu.
3. After the desired control is se lected, press button [2]. A cont rol screen like the one...

 
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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.
Audio Adjust
Vo l u m e  increases the volume, decreases  the volume, and...

 
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Control Explanation
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 Sand T.
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 (vid eo signal input) coming from the 
graphics card in the...

 
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Control Explanation
Fine Tune sharpens the focus by aligning te xt and/or graphics with pixel 
boundaries.
NOTE:  Try Auto Image Adjust first.
Sharpness  adjusts the clarity and focus of the screen image.
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...

 
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Control Explanation
Setup Menu displays the menu shown below:
Language  Select allows the user to choose th e 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 show n above and your computer is set at a 
resolution other than 1680 x 1050,  the following screen appears.
OSD Position  allows the user to move the OSD menus and...

4. Circuit Description 
 
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RTD2553V 
LCD Monitor/MFM Controller 
General 
Embedded dual DDC with DDC1/2B/CI
　  
Zoom scaling up and down
　  
No external memory required.
　  
Require only one crystal to generate all timing.
　  
Programmable 3.3V/5V detection reset
　  output. 
Embedded crystal output to micro
　 -controller. 
3 channels 8 bits PWM output, and wide range
　  selectable PWM frequency. 
Analog RGB Input...

 
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Embedded OSD 
Embedded 12K SRAM dynamically stores OSD
　  command and fonts 
Supp
　 ort multi-color RAM font, 1, 2 and 4-bit per pixel 
16 color palette with 24bit true color selection
　  
Maximum 8 window with alpha
　 -blending/gradient/dynamic fade-in/fade-out, bordering/shadow/3D       
window type 
Rotary 90,180,270 degree
　  
Independent r
　 ow shadowing/bordering 
Programmable blinking effects for each character...

 
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Auto-Position 
1. Define the RGB color noise margin: When the value of color channel R or G or B is greater than 
these noise margins, a valid pixel is found. 
2. Define the threshold-pixel for vertical boundary search 
3. Define the boundary window of searching for horizontal boundary search. 
4. Start auto-function. 
5. The result can be read from register. 
Auto-Tracking 
1. Setting the control-registers for the function...

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Crystal Frequency Output 
RTD can output crystal frequency or 1/2 crystal frequency to external MCU to save a crystal device. 
Once power state is on and reset is finished, we can  set crystal frequency by firmware and output to pin 
48 and pin 110 simultaneously, and then can turn off them in Pin Share Part. Pin 48 and PIN 110 is 
configurable, detail setting is listed in Pin-Share part 
 
RTD2120  8051 Embedded Micro-Controller...