Chapter 1: Product Overview 1-23Operator Display18289NCRTilt Mount Fixed-Angle MountThe 7401 has either a 12.1" TFT (active matrix), 12.1" DSTN (passivematrix), 15" TFT, or 15" DSTN LCD panel.DSTN LCD panels require a contrast adjustment for optimal viewing.Contrast control is set by software, using a digital potentiometer on theProcessor Board. The terminal does not have a user-accessible contrastadjustment. Software can set a default value after reading the Panel ID.Display contrast changes with temperature. The DSTN panels containtemperature-compensation circuitry that adjusts contrast automaticallyas the temperature of the panel changes.LCD Adapter BoardThe signals from the LCD header on the Processor Board are broughtto the LCD on a harness. Since there are multiple pin configurationsand connector types being used on the LCD, a small adapter board isused to receive the LCD harness and map the signals into the correctpin-out for the LCD panel. This board has a connector that plugsdirectly into the LCD panel.
