Grounding Touch Controller
To protect the touch sensor from electromagnetic interference, it is mandatory to connect the ground wire from the touch controller to a metal part of the chassis of the LCD behind the touch sensor.
The ground cable connector is right next to the USB port on the touch controller as indicated in the image below:
The example above illustrates a touch controller for a DISPLAX Skin Dualtouch and Fit, however, it is in the same position on all our touch controllers.
In the following video is an example of grounding the touch controller to the chassis of the LCD at its rear:
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