ViewSonic VA702-2 Service Manual page 22

through CN106 #2.
LED indicator on the front bezel is defined as follows:
a. When press button "Key-Power", U105 #6 is pulled down and U105 #7 is pulled high, so Q104
is conducted and the LED indicator is green.
b. When in power-saving mode, U105 #6 is pulled high and U105 #7 is pulled down, so Q105 is
conducted and the LED indicator is orange.
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
ViewSonic Corporation
FACTORY PRESET TIMING TABLE
Resolution
640 x 350
640 x 400
640 x 400
640 x 480
43.27kHz
720 x 400
800 x 600
832 x 624
1024 x 768
68.67kHz
1152 x 870
1280 x 1024
79.97kHz
1280 x 720
H-Freq. V-Freq.
(KHz) (Hz)
31.5kHz 70Hz
31.5kHz 60Hz
31.5kHz 70Hz
24.7kHz 50Hz
31.5kHz 60Hz
35.0kHz 67Hz
37.9kHz 72Hz,
37.5kHz 75Hz,
85Hz
31.5kHz 70Hz
35.1kHz 56Hz
37.9kHz 60Hz
48.1kHz 72Hz
46.9kHz 75Hz
53.7kHz 85Hz
49.7kHz 75Hz
48.4kHz 60Hz
56.5kHz 70Hz
58.1kHz 72Hz
60.0kHz 75Hz
85Hz
68.6kHz 75Hz
63.4kHz 60Hz
75Hz
45kHz 60Hz
Confidential - Do Not Copy
19
Dot Clock
(MHz)
25.2
25.2
25.2
19.8
25.2
30.2
31.5
31.5
36.0
28.3
36.0
40.0
50.0
49.5
56.3
57.3
65.0
75.0
78.5
78.8
94.5
100
108
135
74.2
VA702-2_VA721-3_VA721b-3