Acer P203W, Service Manual

Page: 8 / 50

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
Color temperature 6500°K (e-Color set to “User” mode)
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 : 1680x1050 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