Acer X173, Service Manual

Page: 8 / 49

8
Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light
: Dark room
Viewing distance : 30-50 cm for LCD performance
Warm up time
All specifications
:
＞
30 minutes
Measuring equipment : Photo detector PR650 w/2
°
Measurement field
Control temperature
6500
°
K
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)
AC Supply voltage : 230V± 5
％
, 50±3Hz
Ambient temperature : 20+5
℃
Display mode : 1280x1024 60Hz, 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