8
Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light
:
Dark room
Viewing distance
:
40 cm for LCD performance, 20 cm for LCD failures
Warm up time
All specifications
:
＞
30 minutes
Fully functional
:
5 seconds
Measuring equipment
:
Chroma 7120 signal generator or equivalent, directly
Connected to the monitor under test.
Minolta CA100 photometer, or equivalent
Control settings
User brightness control
:
Set to Factory preset value (cut off raster)
User contrast control
:
Set to factory preset value, which allows that the brightest two of
32 linear distributed gray-scales (0
～
700mv) can be
distinguished.
User red/white balance,
Green/white balance and
Blue/white balance control
:
In the center (unless otherwise specified)
Power input
:
230V± 5
％
Ambient temperature
:
20+5
Display mode
:
1680x1050, 60 Hz, all white
Measurement systems
The units of measure stated in this document are listed below:
1 gamma = 1 nano tesla
1 tesla = 10,000 gauss
cm = in x 2.54
Lb = kg x 2.2
Degrees F = [°C x 1.8] + 32
Degrees C = [°F - 32]/1.8
u' = 4x/(-2x + 12y + 3)
v' = 9y/(-2x + 12y + 3)
x = (27u'/4)/[(9u'/2) - 12v' + 9]
y = (3v')/[(9u'/2) - 12v' + 9]
nits = cd/(m2) = Ft-L x 3.426
lux = foot-candle x 10.76
Summary of Contents for AL2251W
Page 1: ...1 Acer AL2251W Service Guide ...
Page 9: ...9 LCD Monitor General Specification ...
Page 10: ...10 ...
Page 11: ...11 LCD Panel Specification General Specifications ...
Page 12: ...12 Optical Specifications ...
Page 13: ...13 Supported Timing ...
Page 24: ...24 b The Description For Function Control LEDS ...
Page 25: ...25 ...
Page 31: ...31 Fig 7 6 Remove the screws to remove the frame of the panel Fig 8 9 Fig 8 Fig 9 ...
Page 32: ...32 Fig 10 7 Remove the screws to remove the base back cover Fig 11 12 Fig 11 Fig 12 ...
Page 34: ...34 10 Remove the screws to remove the main board Fig 15 16 Fig 15 Fig 16 ...
Page 41: ...41 Exploded Diagram Model AL2251W ...
