Acer AL2251W Service Manual - Page 8

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Electrical Requirements

Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light
Viewing distance
Warm up time
All specifications
Fully functional
Measuring equipment
Control settings
User brightness control
User contrast control
User red/white balance,
Green/white balance and
Blue/white balance control
Power input
Ambient temperature
Display mode
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
:
Dark room
:
40 cm for LCD performance, 20 cm for LCD failures
:
30 minutes
:
5 seconds
:
Chroma 7120 signal generator or equivalent, directly
Connected to the monitor under test.
Minolta CA100 photometer, or equivalent
:
Set to Factory preset value (cut off raster)
:
T Set to factory preset value, which allows that the brightest two
of 32 linear distributed gray-scales (0
distinguished.
:
In the center (unless otherwise specified)
:
230V
5
:
20+5
:
1680x1050, 60 Hz, all white
8
700mv) can be