Backlight Power Supply; Brightness Output; White Balance; Brightness Uniformity - Acer X163W Service Manual

Acer
Power Off

3.2 Backlight Power Supply

: CMO M156B1-L01
Panel
Lamp
Input Voltage
Input current
On/Off switch level
Brightness PWM duty
CCFL operating Voltage
CCFL Current
CCFL startup voltage
Operating frequency
Protect delay time
Efficiency
Note: Other panels please refer to the reference panel specs.

3.3 Brightness output

he test to verify specifications in this section shall be performed under the following standard conditions unless
T
otherwise noted.
Temperature
Test pattern
Video Resolution
Video input level
Warm-up time
CMO M156B1-L01
Set brightness control and also contrast control at maximum, to measure the screen center, the light output shall ≥
2
BL cd/m (as panel spec)

3.4 White balance

Mode
Cool
Warm
User
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.
off off
-- --
Items
2 CCFL
14 (13.5~16.3)V
1.1A(typ.), 1.4A(max.)
5.5V V
-0.3V≤Voff≤ 0.8 V (off)
Extra PWM duty:35% --100% ,High=3.3V, Low=0.0V, Freq=4* Vsync.freq.
650Vrms (Typ.),
3.0 mA (min.)
7.0mA (Typ.)
8.0mA (Max.)
≧1200 Vrms (0˚C)
40~80 KHz
> 1 second
≥75%(dummy load instead of CCFLs:100Kohm*2)
: 25 ± 5°C
: white
: 1366 x 768
: 700 mV ± 2%
: 30 minutes
LCD Module
9300K
6500K
blanked < 2W
-- < 1W
Specification
≧ no 2.0 V (on)
≧
BL
≥210 cd/m
Chromaticity Coordinate
x
0.283 ± 0.030
0.313 ± 0.030
Panel While x
6
Acer –LCD-X163W
Orange
Off
2
y
0.297 ± 0.030
0.329 ± 0.030
Panel While y
.