ViewSonic VP201b-1 Service Manual page 9

C. Image Calibration
1. Video alignment.
Initial Settings
1.1 Set contrast to 70% and brightness to 100%.
1.2 Input a 640x480 / 60Hz, 5-block (5-MOSAIC) pattern (input level 100IRE 0.7Vp-p), then
activate the White Balance function.
Set SRBG/9300K / 6500K / 5400K / 5000K, R G B Gain as shown below:
R Gain
G Gain
B Gain
2. 9300K alignment:
1.2.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.
1.2.2 Adjust R, G, and B Gain to meet following chromaticity spec:
9300K → x = 0.283 ± 0.005, y = 0.298 ± 0.005, Y > 150cd/m
3. 6500K alignment:
1.3.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.
1.3.2 Adjust R, G and B Gain to meet following chromaticity spec:
6500°K → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 200cd/m
4. 5400K alignment:
1.4.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.
1.4.2 Adjust R, G, and B Gain to meet following chromaticity spec:
5400K → x = 0.335 ± 0.005, y = 0.350 ± 0.005, Y > 180cd/m
5. 5000K alignment:
1.5.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.
1.5.2 Adjust R, G and B Gain to meet following chromaticity spec:
6. sRGB alignment:
1.6.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.
1.6.2 Adjust R, G and B Gain to meet following chromaticity spec:
sRGB → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 200cd/m
7. 64 grays and 16 grays pattern check:
7.1 Input a 1600x1200 / 60Hz, 64 gray-level pattern at 100IRE, with brightness set to 100% and
contrast set to 70%.
7.2 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 2 of the 64
grays are saturated.
7.3 Input a 1600x1200 / 60Hz, 16 gray-level pattern at 100IRE, with brightness set to 100% and
contrast set to 100%.
7.4 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 4 of the 16
grays are saturated.
ViewSonic Corporation
sRGB 9300K
Analog DVI Analog
255 255 255
255 255 255
255 255 255
6500K
DVI Analog DVI Analog
255 255 255
255 255 255
255 255 255
2
Confidential - Do Not Copy
6
5400K 5000K
DVI Analog
255 255 255
255 255 255
255 255 255
2
(Both analog & DVI).
2
(Both analog & DVI).
2
(Both analog & DVI).
(Both analog & DVI).
VP201b/s-1
DVI
255
255
255