46
ViewSonic Corporation
Confidential - Do Not Copy
VA2226w-1
8. after repair, to ensure the quality you should do the following test and adjustment
Item
Content
Equipment
Test OSD
function
1. Signal is set as 1440×900@60Hz under General-1
2.Checking whether each single function key and compound function key
can be worked.
Chroma
Signal Generator
Contrast Check 1. Set input mode to 1440×900@60Hz
2. Set Pattern to 32 gray shades
3. Set contrast to the max. The brightest 5~8 shades brightness
cannot be distinguished.
Chroma
Signal Generator
Color
Temperature
1. Do “Auto color Balance” at 1440×900@60Hz, 32gray
shades
2. Measure color temperature, check it complies with the
following temperature :
6500K x = 0.313 +/- 0.03, y = 0.329+/-0.03
9300K x = 0.283 +/- 0.03, y = 0.298+/-0.03
Chroma Signal
Generator and color
analyzer
Modes switching
check
1. Use Chroma Pattern Generator to make sequence.
VESA (640x480 800x600 1024x768 1280x1024),
and power saving signal,etc.
2. Confirm the above timing modes must be full screen and
the picture must be normal.
3. LED is amber at power saving mode.
Chroma
Signal Generator
VGA cable
detector
When VGA cable is not plugged, the monitor will work in power saving
mode.
Visual check
Chroma Signal
Generator
Panel Flicker
check
1. Mode:1440×900@60Hz
2. Set Brightness& contrast to default value
3. Do “Auto Adjustment”
4. Shut down PC to check whether there’s glitter on the center
of the picture.
Chroma signal
generator
& PC
1. Mode:1440×900@60Hz
2. Pattern: full white
3. Brightness: Max.
4. Contrast: Default
5. Check power consumption
at each modes
State
Power Consumption
LED color
Normal
green
Stand By
amber
Power saving
Power Key Off
no
Chroma signal
generator
Summary of Contents for VA2226w-1
Page 5: ...2 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 4 Handling and Placing Methods...
Page 6: ...3 ViewSonic Corporation Confidential Do Not Copy VA2226w 1...
Page 51: ...48 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Front Cover Back Cover...
Page 52: ...49 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Keypad Board Chassis...
Page 54: ...51 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 I F Board...
Page 60: ...57 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 5 Backlight can t be turned on...
Page 63: ...60 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 8 Bad Screen...
Page 64: ...ViewSonic Corporation Confidential Do Not Copy VA2226w 1 7 Block Diagram 61...
Page 70: ...67 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 9 PCB Layout Diagrams...
Page 71: ...68 ViewSonic Corporation Confidential Do Not Copy VA2226w 1...
Page 72: ...69 ViewSonic Corporation Confidential Do Not Copy VA2226w 1...
Page 73: ...70 ViewSonic Corporation Confidential Do Not Copy VA2226w 1...