Service manual

Page 8
AL1702
Table 2 video mode
Polarity Mode Resolution H-Freq
(KHz)
Band Width
(MHz)
H V
1 720x400 (70Hz) 31.469 28.322 - +
2 640x480 (59.94Hz) 31.469 25.175 - -
3 640x480 (66.67Hz) 35 30.24 - -
4 640x480 (72Hz) 37.861 31.5 - -
5 640x480 (75Hz) 37.5 31.5 - -
6 800x600 (56.25Hz) 35.156 36 + +
7 800x600 (60Hz) 37.879 40 + +
8 800x600 (72Hz) 48.077 50 + +
9 800x600 (75Hz) 46.875 49.5 + +
10 832x624 (74.55Hz) 49.722 57.28 - -
11 1024x768 (60Hz) 48.363 65 - -
12 1024x768 (70Hz) 56.476 75 - -
13 1024x768 (75Hz) 60.023 78.75 + +
14 1152x864 (75Hz) 67.5 108 + +
15 1280x960 (60Hz) 60 108 + +
16 1280x1024 (60Hz) 63.981 108 + +
17 1280x1024 (75Hz) 79.976 135 + +
Table 3 the Hsync, Vsync distinction
Indication
resolution
Distinction Hsync Distinction Vsync The fixed
mode
720 x 400
30.5KHz≦fH≦32.5KHz 69Hz≦fV≦71Hz
1
640 x 480
30.5KHz≦fH≦32.5KHz 59Hz≦fV≦61Hz
2
34KHz≦fH≦36KHz 65.7Hz≦fV≦67.7Hz
3
36.9KHz≦fH≦38.9KHz 71.8Hz≦fV≦73.8Hz
4
36.5KHz≦fH≦38.5KHz 74Hz≦fV≦76Hz
5
800 x 600
34.2KHz≦fH≦36.2KHz 55.3Hz≦fV≦57.3Hz
6
36.9KHz≦fH≦38.9KHz 59.3Hz≦fV≦61.3Hz
7
47.1KHz≦fH≦49.1KHz 71.2Hz≦fV≦73.2Hz
8
45.9KHz≦fH≦47.9KHz 74Hz≦fV≦76Hz
9
832 x 624
48.7KHz≦fH≦50.7KHz 73.5Hz≦fV≦75.5Hz
10
1024 x 768
47.4KHz≦fH≦49.4KHz 59Hz≦fV≦61Hz
11
55.5KHz≦fH≦57.5KHz 69Hz≦fV≦71Hz
12
59KHz≦fH≦61KHz 74Hz≦fV≦76Hz
13
1152 x 864
66.5KHz≦fH≦68.5KHz 74Hz≦fV≦76Hz
14
1280 x 960
59KHz≦fH≦61KHz 59Hz≦fV≦61Hz
15
1280 x 1024
62.9KHz≦fH≦64.9KHz 59Hz≦fV≦61Hz
16
1280 x 1024
79KHz≦fH≦81KHz 74Hz≦fV≦76Hz
17