ViewSonic VG1921wm-2, Service Manual

Page: 19 / 63

ViewSonic Corporation
Confidential - Do Not Copy
VG1921wm-2
16
b. When in power-saving mode, U105 # 91 is pulled high and U105 # 92 is pulled down, so Q105 is
conducted and the LED indicator is orange.
4.4 FACTORY PRESET TIMING TABLE
TIMING
F
H
(KHz)
F
V
(Hz)
Sync
Polarity
Total
(Dot/Line)
Active
(Dot/Line)
Sync Width
(Dot/Line)
Back Porch
(Dot/Line)
Pixel
Freq.(MHz)
31.469 + 800 640 96 48
640*350@70Hz
70.086
−
449 350 2 60
25.175
31.469
−
800 640 96 48
IBM
640*400@70Hz
70.086
+
449 400 2 35
25.175
31.469
−
900 720 108 54
IBM
720*400@70Hz
70.087 + 449 400 2 35
28.322
24.700
−
800 640 96 48
640*480@50Hz
50.000
−
494 480 2 8
19.760
31.469
−
800 640 96 40
VESA
640*480@60Hz
59.940
−
525 480 2 25
25.175
35.000
−
864 640 64 96
640*480@67Hz
66.667
−
525 480 3 39
30.240
37.861
−
832 640 40 120
VESA
640*480@72Hz
72.809
−
520 480 3 20
31.500
37.500
−
840 640 64 120
VESA
640*480@75Hz
75.000
−
500 480 3 16
31.500
43.269
−
832 640 56 80
VESA
640*480@85Hz
85.008
−
509 480 3 25
36.000
35.156 + 1024 800 72 128
VESA
800*600@56Hz
56.250 + 625 600 2 22
36.000
37.879 + 1056 800 128 88
VESA
800*600@60Hz
60.317 + 628 600 4 23
40.000
48.077 + 1040 800 120 64
VESA
800*600@72Hz
72.188 + 666 600 6 23
50.000
46.875 + 1056 800 80 160
VESA
800*600@75Hz
75.000 + 625 600 3 21
49.500
53.674 + 1048 800 64 152
VESA
800*600@85Hz
85.061 + 631 600 3 27
56.250
49.725
−
1152 832 64 224
MAC
832*624@75Hz
74.550
−
667 632 3 39
57.283
48.363
−
1344 1024 136 160
VESA
1024*768@60Hz
60.004
−
806 768 6 29
65.000
56.476
−
1328 1024 136 144
VESA
1024*768@70Hz
70.069
−
806 768 6 29
75.000
60.023 + 1312 1024 96 176 VESA
1024*768@75Hz
75.029 + 800 768 3 28
78.750
68.677 + 1376 1024 96 208 VESA
1024*768@85Hz
84.997 + 808 768 3 36
94.500
1024*768@72Hz 57.700
−
1360 1024 136 144 78.472