ViewSonic VP231WB - 23" LCD Monitor, Service Manual

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Mode No. 1 2 3 4 5 6 7 8 9
Mode Name
TEXT
640 x
350
VGA
640 x
400
VESA
640 x
480
MAC
640 x
480
VESA
640 x
480
VESA
640 x
480
VESA
640 x
480
TEXT
720 x
400
VESA
800 x
600
Horizontal Freq. 31.468 31.468 31.469 35.000 37.861 37.500 43.269 31.469 35.156
Video clock Freq. 25.175 25.175 25.175 30.240 31.500 31.500 36.000 28.322 36.000
Sync. Polarity ＋ － － － － － － － ＋
H. total (Dots) 800 800 800 864 832 840 832 900 1024
H. sync. (Dots) 96 96 96 64 40 64 56 108 72
H. back porch (Dots) 48 48 48 96 128 120 80 54 128
H. active (Dots) 640 640 640 640 640 640 640 720 800
H. front porch (Dots) 16 16 16 64 24 16 56 18 24
Vertical Freq. (Hz) 70.087 70.087 59.940 66.667 72.809 75.000 85.008 70.087 56.250
Sync. Polarity － ＋ － － － － － ＋ ＋
V. total (Lines) 449 449 525 525 520 500 509 449 625
V. sync. (Lines) 2 2 2 3 3 3 3 2 2
V. back porch (Lines) 60 35 33 39 28 16 25 35 22
V. active (Lines) 350 400 480 480 480 480 480 400 600
V. front porch (Lines) 37 12 10 3 9 1 1 12 1
ViewSonic Corporation
Co
nfidential
-
Do Not Copy VP231wb
Mode No.
10 11 12 13 14 15 16 17 18 19
Mode Name
VESA
800 x
600
VESA
800 x
600
VESA
800 x
600
VESA
800 x
600
MAC
832 x
624
VESA
1024 x
768
VESA
1024 x
768
XGA
1024 x
768
VESA
1024 x
768
VESA
1024 x
768
Horizontal Freq. (KHz) 37.879 48.077 46.875 53.674 49.727 48.363 56.476 58.099 60.023 68.677
Video clock Freq. 40.000 50.000 49.500 56.250 57.285 65.000 75.000 78.084 78.750 94.500
Sync. Polarity ＋ ＋ ＋ ＋ － － － － ＋ ＋
H. total (Dots) 1056 1040 1056 1048 1152 1344 1328 1344 1312 1376
H. sync. (Dots) 128 120 80 64 64 136 136 136 96 96
H. back porch (Dots) 88 64 160 152 224 160 144 160 176 208
H. active (Dots) 800 800 800 800 832 1024 1024 1024 1024 1024
H. front porch (Dots) 40 56 16 32 32 24 24 24 16 48
Vertical Freq. (Hz) 60.317 72.188 75.000 85.061 74.553 60.004 70.069 72.082 75.029 84.997
Sync. Polarity ＋ ＋ ＋ ＋ － － － － ＋ ＋
V. total (Lines) 628 666 625 631 667 807 806 806 800 808
V. sync. (Lines) 4 6 3 3 3 6 6 6 3 3
V. back porch (Lines) 23 23 21 27 37 29 29 29 28 38
V. active (Lines) 600 600 600 600 624 768 768 768 768 768
V. front porch (Lines) 1 37 1 1 3 3 3 3 1 1
(B). Analog and Digital timing chart.
5