Acer B193, Service Manual

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6
2.0 mA (min.)(With PWM Dim)
7.0mA (Typ.)
CCFL Current
8mA (Max.)
CCFL startup voltage
≧
1700 Vrms (0 ˚ C)
Operating frequency 40~80 KHz
Protect delay time
> 1 second
Efficiency ≥
70%(with dummy load)
3.3 Brightness output
The test to verify specifications in this section shall be performed under the following standard
conditions unless otherwise noted.
Temperature : 25 ± 5°C
Test pattern : white
Video Resolution : 1440 x 900
Video input level : 700 mV ± 2%
Warm-up time : 30 minutes
LCD Module BL
HSD190MEN3-A00
≥
250 cd/m
2
Set brightness control and also contrast control at maximum, to measure the screen center,
the light output shall
≥ BL cd/m
2
(as panel spec)
3.4 White balance
Chromaticity Coordinate
Mode
x y
Cool 9300K 0.283 ± 0.030 0.297 ± 0.030
Warm 6500K 0.313 ± 0.030 0.329 ± 0.030
User Panel While x Panel While y
The test standard conditions refer to Sec 3.3. (Brightness and contrast are under default
value)
3.5 Brightness uniformity
The test standard conditions refer to Sec 3.3.
%
≥
75
) (backlight points nine of luminance Max.
) (backlight points nine of luminance Min.