Philips 190C1SB/00, Service Manual

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General Product Specification
signal sources must have 75 ohm output impedance.
(2) Luminance setting : controls to be set to 300 nits with
full screen 100 % duty cycle white signal
(3) Warm up: more than 30 minutes after power on with signal supplied.
(4) Ambient light: 400 -- 600 lux.
(5) Ambient temperature: 20 ± 5
°
C
3.18 Brightness
To follow Panel specification.
3.19 Image size
Actual display size 410.4 x 256.5mm
3.20 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_min
X 100% > 75% (Follow panel spec.)
B_max
Where B_max =Maximum brightness
B_min = Minimum brightness
3.21 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
3.22 Color temperature adjustment
There are six factory preset white color 11500K, 9300K, 8200K, 7500K, 6500K,
sRGB, 5000K
Align by Philips PerfecTune (also called FGA) function.
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:
74 190C1 LCD