Service manual

ViewSonic Corporation Confidential - Do Not Copy VA2012w-2_VA2012wb-2
25
5. Adjustment Procedure
1. Function test
(1) Test equipment
Color video signal and pattern generator (or PC with SXGV resolution)
(2) Test condition
Before function testing and alignment, the unit must warm up for at least 30 minutes under the
following conditions:
1. Room temperature
2. With full-white screen , RGB , black pattern
3. with cycled display modes.
2. Test display modes
Item Timing Analog Digital
1 640 x 350 @ 70Hz, 31.5kHz Yes N/A
2 640 x 400 @ 70Hz, 31.5kHz Yes N/A
3 640 x 480 @ 60Hz, 31.5kHz Yes N/A
4 640 x 480 @ 67Hz, 35.0kHz Yes N/A
5 640 x 480 @ 72Hz, 37.9kHz Yes N/A
6 640 x 480 @ 75Hz, 37.5kHz Yes N/A
7 720 x 400 @ 70Hz, 31.5kHz Yes N/A
8 720 x 480i 59.94/60Hz @ 15.7 kHz Yes N/A
9 720 x 576p 50Hz @ 31.25kHz Yes N/A
10 720 x 576i 50Hz @ 15.62kHz Yes N/A
11 800 x 600 @ 56Hz, 35.1kHz Yes N/A
12 800 x 600 @ 60Hz, 37.9kHz Yes N/A
13 800 x 600 @ 75Hz, 46.9kHz Yes N/A
14 800 x 600 @ 72Hz, 48.1kHz Yes N/A
15 832 x 624 @ 75Hz, 49.7kHz Yes N/A
16 1024 x 768 @ 60Hz, 48.4kHz Yes N/A
17 1024 x 768 @ 70Hz, 56.5kHz Yes N/A
18 1024 x 768 @ 72Hz, 58.1kHz Yes N/A
19 1024 x 768 @ 75Hz, 60.0kHz Yes N/A
20 1280x720p 50Hz @ 37.5kHz Yes N/A
21 1280x 720p @ 60Hz, 45kHz Yes N/A
22 1280 x 1024 @ 60Hz, 63.4kHz Yes N/A
23 1280 x 1024 @ 75Hz, 79.97kHz Yes N/A
24 1600 x 1200 @ 60Hz, 75kHz Yes N/A
25 1600 x 1200 @ 70Hz, 87.5kkHz Yes N/A
26 1600 x 1200 @ 75Hz, 93.8kHz Yes N/A
27 1680 x 1050 @ 60Hz, 65.3 kHz Yes N/A
28 1680 x 1050 @ 75Hz, 82.3 kHz Yes N/A
29 1920 x 1080i @ 50Hz, 56.5kHz Yes N/A
30 1920 x 1080p @ 50Hz, 62.5kHz Yes N/A