Philips 192E2SB2/10, Service Manual

Page: 68 / 86

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ʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳʳ˃ˁ˄ 192E2SB2 18.5” Wide WXGA LCD Monitor
2010/08/19 PHILIPS 16 of 26
68 192E2SB2 LCD
General Product Specification
4.3 Image size
Actual display size 337.920 mm x 270.336 mm
4.4 Brightness uniformity
Set contrast at 100% and turn the brightness to get average above 300 nits at centre of the screen.
Apply the Fig 1, it should comply with the following formula:
( B_max - B_min )
X 100% > 75%
B_max
Where B_max = Maximum brightness
! ! ! !!!!!!!!!!!
B_min = Minimum brightness
4.5 Check Cross talk (S)
Apply Pattern 2. Set contrast and brightness at 100 %.
Measure YA. Then output Pattern 3 and measure YB.
the cross talk value :
ABS ( YA - YB )
 X 100% < 1.5 %
YA
4.6 Color temperature adjustment
There are three factory preset white color 9300K, 6500K, sRGB.
Apply full white pattern, with brightness in 100 % position and the contrast control at 50 % position.
The 1931 CIE Chromaticity (color triangle) diagram (x ,y) coordinate for the screen center should be:
Product specification
CIE coordinates (x,y)
9300K x = 0.283 ± 0.02
y = 0.297 ± 0.02 PerfecTune I
6500K/sRGB x = 0.313 ± 0.02
y = 0.329 ± 0.02 PerfecTune I
Production alignment spec
CIE coordinates (x,y)
9300K x = 0.283 ± 0.006
y = 0.297 ± 0.006 PerfecTune I
6500K/sRGB x = 0.313 ± 0.006
y = 0.329 ± 0.006 PerfecTune I
Quality Inspection specification
CIE coordinates (x,y)
9300K x = 0.283 ± 0.015
y = 0.297 ± 0.015
6500K/sRGB x = 0.313 ± 0.015
y = 0.329 ± 0.015