ViewSonic Vx2255wmb-2 Service Manual

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ViewSonic Corporation 
Confidential - Do Not Copy    VX2255wmb-2 
  VX2255wmh-2 
1050@60Hz by [1]+[2] short cut key 
(primary = 1680 x 1050@60Hz) 
 
Auto image should be executed when Switch 
1400 x 1050@60Hz and 1680 x 1050@60Hz 
by [1]+[2] short cut key 
46  1440 x 900  @  60  Hz,  55.9  kHz V V V V  
47  1440 x 900  @  75  Hz,  70.6  kHz V V V V   
48  1600 x 1200  @  60  Hz,  75  kHz V V V V   
49  1680 x 1050  @  60  Hz,  65.3  kHz ü V
XV  
 
*1. Tolerance 
≧ ±2KHz. (if the range dose not cover...

 9 
ViewSonic Corporation 
Confidential - Do Not Copy    VX2255wmb-2 
  VX2255wmh-2 
2-5  FRONT PANEL CONTROLS AND INDICATORS 
Front Panel Hardware Controls 
Power Switch (Front Head)  Power Control, soft Power Switch. 
Power LED (Front Head) Blue – ON 
Amber – Active Off (Sleeping Mode) 
Dark = Soft Power Switch OFF 
Front Panel Controls (Head) 
1. [
] --- Position in the center of front 
bezel bottom. 
2.  [ 1 ] [▲ ] [▼ ] [ 2 ] --- Position in right 
side   [ 1 ] Button 1  
[ 2 ] Button 2 
[
] Power...

2-6 AUDIO INTERFACE (SPEAKER SPECIFICATION)
Line input signal 1.0 Vrms @1kHz
Line input impedance10kOhm
Maximum Amp power output (Watt)
2 W (RL=?

WebCamInput interface USB 2.0
Maximum Amp power output (Watt) 0.8 W
Webcam action indicatorAP (on) --- Blue
AP (off) --- dark
Monitor power off --- dark (Webcam
power off the same time)
When the monitor into sleeping mode,
The webcam power off the same time
Pixel Real 1.3M / CMOS
Resolution1280 x 1024 (Static status / Ma x)
1024 x768 ( Dynamic status / max)
Input connection
USB type B
Screen imageThere should be no affect on the screen
image stability under any conditions
Cable color requirementVX2...

2-7 TFT LCD PANEL
Panel Source Identify
The panel code  “X” for INN panel should be shown on the position 1. Lower right side of ID label.  (See Figure 2)
2. Lower right side of UPC label . (See Figure 3)
3.  The F/W version sticker or silkscreen Main board.
Panel Characteristics :
1
st Source Panel
Model number INN MT220W W01 V.0
TypeTN type with LVDS interface
Active Size22” wide; 473.76(H) x 296.1(V)
Pixel ArrangementRGB Vertical Stripe
Pixel Pitch0.282(H) x 0.282(H)  mm
GLASS TREATMENTAnti Glare...

3. Front Panel Function Control Description 
Adjusting the Screen Image
Main Menu
with OSD controls
Displays the control screen for the highlighted control.Standby Power On/Off
Power lightBlue = ON
Orange = Power Saving
Displays the Main Menu or exits the control screen and saves adjustments.
Webcam indicator
Webcam
Headphone jack
Microphone hole
Scrolls through menu options and adjusts the displayed
control.
Increases the volume, decreases the volume, and mutes the audio.
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ViewSonic Corporation...

 
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 shown 
below appears.
4. To adjust the setting, press the up S  or...

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 
connected to the VX2255wmb/VX2255wmh.
Audio Adjust
Vo l u m e  increases the...

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 fo r 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...

Control Explanation
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 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.
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