Hitachi CML176SXW, Service Manual

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2. ELECTRICAL REQUIREMENTS
2.1 Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified.
Ambient light
: 225 lux
Viewing distance
: 50cm in front of LCD panel
Warrn up time
All specifications : 30 minutes
Fully functional : 5 seconds
Measuring Equipment :
Chroma 2250 signal generator or equivalent, directly
Connected to the monitor under test.
Minolta CA100 photometer, or equivalent
Control settings
User brightness control : Maximum (unless otherwise specified)
User contrast control : Typical (unless otherwise specified)
User red/white balance,
Green/white balance and
Blue/white balance control : In the center (unless otherwise specified )
Power input :
110Vac or 220Vac
Ambient temperature
: 20
±
5 ˚ C (68
±
9 ˚ F)
Analog input mode :
1280 x1024 /60Hz
2.1.1 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
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