Service manual

H-sync. Polarity Negative Positive Positive Positive Positive Negative Negative

V-sync Polarity Negative 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

15 16 17 18 19 20 21

Signal name Symbol XGA XGA XGA XGA SXGA 720P SXGA

H-frequency (kHz) 56.476 58.099 60.023 68.677 63.981 45.000 79.976

V-frequency (Hz) 70.069 72.082 75.029 84.997 60.02 60.00 75.025

Pixel rate (MHz) 75.000 78.084 78.750 94.500 108 74.250 135

H-sync Ths 136 136 96 96 112 40 144

H-back porch Thb 144 160 176 208 248 270 248

Count num (H-total) Thd 1328 1344 1312 1376 1688 1658 1688

H- front porch Thf 24 24 16 48 48 60 16

V-sync Tvs 6 6 3 3 3 5 3

V-back porch Tvb 29 29 28 36 38 20 38

Count num (V-total) Tvd 806 806 800 808 1066 750 1066

V-front porch Tvf 3 3 1 1 1 5 1

H-sync. Polarity Negative Negative Positive Positive Positive Negative Positive

V-sync Polarity Negative Negative Positive Positive Positive Negative Positive

H-resolution (dots) 1024 1024 1024 1024 1280 1280 1280

V-resolution (lines) 768 768 768 768 1024 720 1024

ViewSonic Corporation

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