![background image](http://html1.mh-extra.com/html/viewsonic/vg810b/vg810b_service-manual_1021231012.webp)
Appendix A
:
Preset timing chart
Analog mode
1 2 3 4 5
6
7
Signal name
symbol
TEXT
mode
TEXT
mode
VGA MAC-II VESA-VGA
VESA-VGA
VESA-VGA
H-frequency (kHz)
31.468
31.469
31.468
35.001
37.5
37.862
43.269
V-frequency (Hz)
70.087
70.087
59.941
66.667
75
72.807
85.005
Pixel rate (MHz)
25.175
28.322
25.175
30.240
31.5
31.501
36.000
H-sync
Ths 96 108 96 64
64
40
56
H-back porch
Thb
48
54
48
96
120
128
80
Count num (H-total)
Thd
800
900
800
864
840
832
832
H- front porch
Thf
16
18
16
64
16
24
56
V-sync
Tvs
2 2 2 3 3
3
3
V-back porch
Tvb
60
35
33
39
16
28
25
Count num (V-total)
Tvd
449
449
525
525
500
520
509
V-front porch
Tvf
37
12
10
3
1
9
1
H-sync. Polarity
Positive Negative Negative Negative
Negative
Negative
Negative
V-sync Polarity
Negative Positive Negative Negative
Negative
Negative
Negative
H-resolution
(dots)
640 720 640 640 640
640
640
V-resolution
(lines)
350 400 480 480 480
480
480
8
9
10
11
12
13
14
Signal name
Symbol IBM-851
4A
SVGA
SVGA
SVGA
SVGA MAC
16" XGA
H-frequency (kHz)
35.156
37.879
48.077
46.875
53.674
49.725
48.363
V-frequency (Hz)
56.250
60.317
72.188
75.000
85.061
74.5
60.004
Pixel rate (MHz)
36.000
40.000
50.000
49.500
56.250
57.283
65.000
H-sync Ths
72
128
120
80
64
64
136
H-back porch
Thb
128
88
64
160
152
224
160
Count num (H-total)
Thd
1024
1056
1040
1056
1048
1152
1344
H- front porch
Thf
24
40
56
16
32
32
24
V-sync
Tvs
2 4 6 3 3
3
6
V-back porch
Tvb
22
23
23
21
27
39
29
Count num (V-total)
Tvd
625
628
666
625
631
667
806
V-front porch
Tvf
1
1
37
1
1
1
3
H-sync. Polarity
Positive Positive
Positive
Positive
Positive
Negative
Negative
V-sync Polarity
Positive Positive
Positive
Positive
Positive
Negative
Negative
H-resolution
(dots)
800 800 800 800 800
832
1024
V-resolution
(lines)
600 600 600 600 600
624
768
9
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG810s/b
Содержание VG810B
Страница 30: ...6 6 Figure of Waveform 27 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 31: ...28 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 49: ...46 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 50: ...47 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 51: ...48 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 53: ...10 Schematic Diagrams 50 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 54: ...51 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 55: ...52 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 56: ...53 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 57: ...54 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 58: ...55 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 59: ...56 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 60: ...57 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 61: ...58 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 62: ...59 ViewSonic Corporation Confidential Do Not Copy VG810s b...
Страница 63: ...11 PCB Layout Diagrams 60 ViewSonic Corporation Confidential Do Not Copy VG810s b Main Board...
Страница 64: ...61 ViewSonic Corporation Confidential Do Not Copy VG810s b Main Board...
Страница 65: ...62 ViewSonic Corporation Confidential Do Not Copy VG810s b Power Board...
Страница 66: ...63 ViewSonic Corporation Confidential Do Not Copy VG810s b Control Board...