Hello. My Avic F930BT after a few minutes of listening to the radio goes to the demonstration of its capabilities. How to get rid of it?
It works like a screen saver and repeats endlessly. After touching the screen, it works properly again a few minutes and again
  Please help...

Try turning off Demo Mode in the Navi Settings menu. Download the manual pdf from Pioneer's web site. It is easily searched.

The navigation demonstration mode is off, in addition this mode demonstrates the operation of navigation, for me it is a demonstration of the capabilities of all equipment. The demonstration ends with a bar code and from the beginning. I will try to record a video and post it. The manual has only a description of disabling and enabling the navi demo.