Acer AL1911 AL1911 Service Guide - Page 11

• Type • Input Impedance • Polarity • Amplitude • Display Color Analog R, G, B. 75 ohm +/- 2% Positive 0 - 0.7 +/- 0.05 Vp same as LCD panel 2.4.2 Sync input • Signal • Polarity separate horizontal and vertical sync, or composite sync which are TTL compatible positive and negative. 2.4.3 Interface frequency The following frequency range is generalized by supported timing. If the entered mode does not match the supported timing the display optimization will not be assured. • Horizontal Frequency 24KHz --80KHz • Vertical Frequency 56Hz ---------75Hz DISPLAY MODES MONITOR MODE NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 SCREEN RESOLUTION 640x350 640X400 640X400 640X400 640X480 640X480 640X480 640X480 720X400 832X624 800X600 800X600 800X600 800X600 1024X768 1024X768 1024X768 1024X768 1024x768 1280X1024 1280X1024 HORIZONTAL SYNC RATE (kHz) 31.5 + 24.83 31.531.531.5 35.037.8637.531.5 49.7235.16+ 37.8 + 48.07 + 46.87+ 48.4 53.96 + 56.47 60.0 + 60.2464.0 + 80.0 + VERTICAL SYNC RATE (Hz) 70.0 56.4 70.0+ 70.160.0 66.6772.8075.070.0 + 74.55 56.25+ 60.0 + 72.18 + 75.0+ 60.0 66.13 + 70.07 75.0 + 75.0260.0 + 75.0 + VIDEO CLK STANDARD (MHz) 25.0 21.05 25.0 25.19 25.0 30.24 31.5 31.5 28.0 57.28 36.0 40.0 50.0 49.5 65.0 71.66 75.0 78.75 80.0 108.5 135.0 VGA NEC VGA NEC Defacto MAC VESA VESA Text Defacto MAC SVGA VESA VESA VESA VESA XGA VESA VESA MAC-768 SXGA Defacto 11