ViewSonic Vg930m3 Service Manual

ViewSonic Corporation Confidential - Do Not Copy    VG930m-3_VA930m-1 
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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 10.
Main Menu
with OSD controls
Front Control Panel
shown below in detail
Scrolls through menu options and adjusts the displayed...

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Do the following to ad
just 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...

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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 ha ve more than one computer...

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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.
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...

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Control Explanation
OSD Background allows the user to turn the OSD background On or Off.
Memory Recall  returns the adjustments back to fa ctory 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 
 4.2 Power Board   
Electric Spec : 
Connection  9Pin NO.  6Pin NO.  Symbol  Description 
 9 NC  DC-Output  24.0±10%Vdc / 50mA (Optional) 
  8 NC  DC-Output  12±10%Vdc / 200mA (Optional) 
  7 6  BL-Adj  Luminance Control ( 0Vdc~3.3Vdc ) 
CON802  6 5  ON/OFF  ON : 3.3Vdc or 5.0Vdc ; OFF : 0V 
  4. 5  3. 4  DC-Output  5.0±5%Vdc / 2500mA 
 2. 3  1. 2  GND  GND 
 1 NC DC-Output -8±10%Vdc  / 100mA(Optional) 
1...

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ELECTRIC TEST   
1. POWER TEST :   
1-1 . OUTPUT VOLTAGE TEST : Output  24V connect 50mA, CON801 Input  
1-2 . HI-POT TEST :  1)  Test Requirements – Input Voltage : 3.0KVdc 
– Measurement Time : 3sec   
– Temperature : 25 ± 5   ℃℃ 
2)   A method of measurement : Injection voltage between  Utility (Line and Neutral short) and output line (short 
between + and - )   
3)   Criterion for Judging : PASS 
1-3 . SHORT TEST...

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 1-6 . Insulation Resistance 
1)  Test Requirements – Input Voltage : 500Vdc   
– Temperature : 25 ℃± 5℃ 
2)   A method of measurement : Test between Utility (live  and neutral short) and output line (+ and - short). 
(insulation resistance test)   
3)   Criterion for Judging : Insulation resistance  ≧ 100MΩ 2. INVERTER TEST: 2-1. OPEN LAMP PROTECT 
TEST :   
Test Condition : ON/OFF PIN=3.3Vdc or 5.0Vdc , BL-Adj PIN=3.3Vdc or...

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OLD TEST 
CN801 Input 100~240Vac , CN802 BL-Adj Pin CONNECT 3.3Vdc , CN802 ON/OFF Pin CONNECT 
3.3Vdc OR 5.0Vdc ,   
ATTENTION  1. WHEN OPERATION, WEAR STATIC ELECTRICITY RING AND KEEP GND. 
2.  TO PREVENT A SHORT CIRCUIT. 
3.  CON801 / C809 / C802 / C803 / BD801/ Q801 / T801/T802/T901/ THESE LARGE VOLUM MUST WEIGHT 
A LO T  
 
4.3 Scaler Board 
  „  17  and 19  LCD MONITOR 
„   WORK ENVIROMENT 1. WORK ENVIROMENT TEMPERATURE : 0...