Acer X233H, Service Manual

Page: 8 / 50

8
Electrical Requirements of X233H
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light Dark room (< 1 cd/m
2
)
Viewing distance 40 cm for LCD performance, 20 cm for LCD failures
Warm up time
＞ 30 minutes
Analog Input signal 700 mVss
Control temperature
6500
°
K
User brightness control The value under user mode
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.
Picture position and size Factory preset value
Viewing angle 90° H and V
AC Supply voltage 230V± 5
％
, 50±3Hz
Ambient temperature 20+5
℃
Humidity 65%
±
20%
Display mode 1920 x 1080, 60 Hz, all white
e-color mode Set to “User” 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