Service manual
H-frequency (kHz) 58.099 60.023 68.677 63.981 45.000
V-frequency (Hz) 72.082 75.029 84.997 60.02 60.00
Pixel rate (MHz) 78.084 78.750 94.500 108 74.250
H-sync Ths 136 96 96 112 40
H-back porch Thb 160 176 208 248 270
Count num (H-total) Thd 1344 1312 1376 1688 1658
H- front porch Thf 24 16 48 48 60
V-sync Tvs 6 3 3 3 5
V-back porch Tvb 29 28 36 38 20
Count num (V-total) Tvd 806 800 808 1066 750
V-front porch Tvf 3 1 1 1 5
H-sync. Polarity Negative Positive Positive Positive Negative
V-sync Polarity Negative Positive Positive Positive Negative
H-resolution (dots) 1024 1024 1024 1280 1280
V-resolution (lines) 768 768 768 1024 720
Notes: Because this model no support FRC and in order to meet the panel spec of vertical frequency,
some timing can not full screen in vertical size.
Ex:640x400/70Hz;640x350/70Hz ;720x400/70Hz ;640x480/85Hz;800x600/85Hz;
1024x768/85Hz.
15 16 17 18 19
Signal name Symbol XGA XGA XGA SXGA HD-720P
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ViewSonic Corporation Confidential
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Do Not Copy VG910s/b