Service manual

5.2.2
Video alignment.
5.2.1.1 Preset condition.
5.2.1.1.1 Setting the contrast to 70%
,
brightness to 100%.
5.2.1.1.2 Input 1280x1024 / 60Hz, 16 gray pattern (input level 100IRE 0.7Vp-p), then press
“RGB RESET”.9300K / 6500K / 5400K / 5000K, R G B offset preset as below:
9300K 6500K 5400K 5000K
Analog DVI Analog DVI Analog DVI Analog DVI
R sub-contrast 128 128 128 128 128 128 128 128
G sub-contrast 128 128 128 128 128 128 128 128
B sub-contrast 128 128 128 128 128 128 128 128
5.2.1.2 9300K alignment:
5.2.1.2.1 Input 1280x1024 / 60Hz & full white pattern at 100IRE.
5.2.1.2.2 Adjust R, G, and B sub-contrast to meet following chromaticity spec:
9300K → x = 0.283 ± 0.005, y = 0.298 ± 0.005, Y > 155cd/m
2
(Both analog & DVI).
5.2.1.3 6500K alignment:
5.2.1.3.1 Input 1280x1024 / 60Hz & full white pattern at 100IRE.
5.2.1.3.2 Adjust R, G and B sub-contrast to meet following chromaticity spec:
6500°K → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 190cd/m
2
(Both analog & DVI).
5.2.1.4 5400K alignment:
5.2.1.4.1 Input 1280x1024 / 60Hz & full white pattern at 100IRE.
5.2.1.4.2 Adjust R, G, and B sub-brightness to meet following chromaticity spec:
5400K → x = 0.335 ± 0.005, y = 0.350 ± 0.005, Y > 180cd/m
2
(Both analog & DVI).
5.2.1.5 5000K alignment:
5.2.1.5.1 Input 1280x1024 / 60Hz & full white pattern at 100IRE.
5.2.1.5.2 Adjust R, G and B sub-contrast to meet following chromaticity spec:
5000°K → x = 0.346 ±0.005, y = 0.359 ± 0.005, Y > 180cd/m
2
(Both analog & DVI).
5.2.1.6 64grays & 16grays pattern check:
5.2.1.6.1 Input 1280x1024 / 60Hz & 64 grays pattern at 100IRE, adjust brightness 100%, and
contrast 70%.
5.2.1.6.2 9300K / 6500K / 5400K / 5000K, the 64 grays can 2steps saturation.
5.2.1.6.3 Input 1280x1024 / 60Hz & 16 grays pattern at 100IRE, adjust brightness 100%, and
contrast 100%.
5.2.1.6.4 9300K / 6500K / 5400K / 5000K, the 16 grays only had 4 grays can saturation.
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ViewSonic Corporation Confidential
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Do Not Copy VG910s/b