Acer X173 X173 LCD Service Guide - Page 8

Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time All specifications Measuring equipment Control temperature User brightness control User contrast control User red/white balance, Green/white balance and Blue/white balance control AC Supply voltage Ambient temperature Display mode : Dark room : 30-50 cm for LCD performance : ＞30 minutes : Photo detector PR650 w/2° Measurement field 6500° K : Set to Factory preset value (cut off raster) : Set to factory preset value, which allows that the brightest two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished. : In the center (unless otherwise specified) : 230V± 5％, 50±3Hz : 20+5℃ : 1280x1024 60Hz, all white Measurement systems The units of measure stated in this document are listed below: 1 gamma = 1 nano tesla 1 tesla = 10,000 gauss cm = in x 2.54 Lb = kg x 2.2 Degrees F = [°C x 1.8] + 32 Degrees C = [°F - 32]/1.8 u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3) x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] nits = cd/(m2) = Ft-L x 3.426 lux = foot-candle x 10.76 8