Added a small function which is LED background light control circuit to smart controller with shorting the pins to decide the LED turn on all the time or turn on 30 seconds and than turn off automaticly.IF you used to start the printing jobs at night and get the parts at the next morning that means with the new modification LCD back light will not annoying you any more you can make the time of light turn on longer or shorter by adjust the TRIMM R4 100K form 10s to 2 mins. Hope you will like that . This controller is 100% compatible with original design.That mean you can use the original adapter. If you have ever bought a Smart LCD controller display from us but want to use with other boards you just need to buy an adapter separatelywhich is 100% compatible with the controller.