ViewSonic Vx2255wmb-2 Service Manual

							
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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 other timing mode) 
*2. Any timing not in the list, it should display as  normal or show on “OUT OF RANGE” OSD message with 
blanking. 
*3. The image quality of 85Hz mode might be worse than 75Hz. 
 
Primary Presets 
 1680x1050 @ 60Hz 
 
User Presets 
Number of User Presets (recognized timings) Available : 10 presets total in FIFO configuration  
 
Changing Modes 
●  Maximum Mode Change Blank Time for image st ability : 3 seconds (Max), excluding “Auto 
Image Adjust” time    
●  Under DOS mode (640 x 350, 720 x 400 & 640 x 400) ,  it should recall factory setting when 
execute “Auto Image Adjust”  
●  The monitor needs to do “Auto Adjust” the first time when a new mo\
de is detected  
(See section “0-Touch™ Function Actions”)   
						

							
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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  
[ ▼ ] Down arrow button 
[ ▲ ] UP ARROW BUTTON 
 
Note: Power Button, Button 1 and Button 2 
must be one-shot logic operation. (i.e. there 
should be no cycling) 
Reaction Time  OSD must fully appear within 0.5s after 
pushing Button 1 
 
Short Cuts Function from the button(s) 
[1] Main  Menu 
[2] Input toggle (Analog / Digital)  
[▼ ] or [ ▲]  To immediately activate Audio menu. 
[▼ ]+[▲ ]  Recall both of audio and mute to default 
[1] + [2]  Toggle 1400x1050 and 1680x1050 mode when input 
1400x1050 or 1680x1050 mode 
[1] + [▼] + [▲
] 
(Keep pushing 3 sec)  White Balance. (Not shown on user’s guide) 
[1] + [▼] Power Lock 
[1] + [▲] OSD Lock 
[2] + [▼] DDC/CI switch 
Æ on = DDC/CI ; off = DDC2B 
[▼ ] +[▲ ] + [] Factory Mode 
Remark : All the short cuts function are only available while OSD off 
  
						

							
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
255wmb --- black
VX2 255wmh --- white
Cable type / length USB2.0 type A to type B  cable / 1.8m
length
System requisition (at least) 1. OS --- WINDOWS XP  / WINDOWS
VISTA
2. CPU --- P4 1.4GHZ OR AMD ATHLON 1GHZ
3. MEMORY --- 128MB
4. H.D. --- 200MB
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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 (Hard coating 3H)
# OF BACKLIGHTS4CCFL
BACKLIGHT LIFE 40000Hours (Min) at 7.0mA
Luminance (5-point) –
Condition:
CT = User Color,
Contrast = Max,
Brightness = Max
300cd/3
						

							
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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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 down T buttons.
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 1680 x 1050 @ 60Hz video signal to 
the LCD display. (Look fo r instructions on “changing the refresh rate”  in the graphics cards 
user guide.)
• If necessary, make small adjustments using  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 “act ive area” of the LCD display.)
The command line at the bottom of the
control screen tells what to do next from
this screen. You can toggle between control
screens, adjust the selected option, or exit
the screen.
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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 
connected to the VX2255wmb/VX2255wmh.
Audio Adjust
Vo l u m e  increases the volume, decreases  the volume, and mutes the audio.
Mute  temporarily silences audio output.
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 industr y standard for color management, 
with support being included in many of th e 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 adjustment s to be disabled.
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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 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 computer, the LC D model number, the serial number, and 
the ViewSonic
® website URL. See your graphics card’s user guide for 
instructions on changing the resolution an d refresh rate (vertical frequency).
NOTE:  VESA 1680 x 1050 @ 60Hz (recommended) means that the resolution 
is 1680 x 1050 and the refresh rate is 60 Hertz.
Manual Image Adjust
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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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