Acer H243H - Bmid, Service Manual

Page: 6 / 55

Acer
Acer –LCD-H243H
5
≥
75%
(DC output full loading and nominal AC input voltage range)
Ripple and Noise
Total composite ripple and noise less than 800mV for +25V output, and less than 150mV for +5V output, and 50mV for
+3.3V output tested by DC loading side parallel with a 47uF/EC and 0.1uF/Ceramic. Capacitors and measured band-width
with DC-20MHz
DC Output Voltage and Current
3.1 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 : 1920 x 1080
Video input level : 700 mV ± 2%
Warm-up time : 30 minutes
Set brightness control and also contrast control at maximum, to measure the screen center, the light output shall BL ≥ 240
cd/m
2
(as panel spec).
3.2 White balance
The test standard conditions refer to Sec 3.1.( Brightness and contrast are under default value )
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
3.3 Brightness uniformity
The test standard conditions refer to Sec 3.1.
%
≥
75
) (backlight points nine of luminance Max.
) (backlight points nine of luminance Min.
L/2
L/10
W/10
W/2
1 2
5
7 9
3
4
6
8