- 98 -11.2.3. KeyPerforms BHT key input test.Press a key, and a beeper is sounded and the black-and-whiteindication of the corresponding terminal key is inverted.(When “SCAN” button is pressed, the BHT body vibrates.)When all keys are pressed, a test ends and a screen moves to theinput device menu screen.BHT-1700 BHT-180011.2.4. Touch ScreenPerforms touch screen operation test.If you swipe outside an area not allowed to be touched (black-painted area), a line will bedisplayed along the swiped path.If you touch an area not allowed to be touched, the BHT body will vibrate.When you swipe the circumference of the area, a test ends and a screen moves to the inputdevice menu screen.11.3. Display Device11.3.1. LCDPerforms screen display test.On the default display, character strings are displayed. When you tap the screen or pressENT key, LED and the screen display are changed as described below.Tap/ENT LED ScreenDefaultdisplayRed, lighting Displays character strings.1st Blue, lighting Turns off all lights.2nd Green,lightingDisplays a white screen with its brightness decreased.3rd No light Displays a white screen with its brightness increased.4th No light A test ends, and a screen moves to the display device menuscreen.
