Turn off the audio receiver, then press and hold the multi-function button for more than 15 seconds.

The indicator (blue) flashes 4 times, and the audio receiver is reset to the factory settings. All pairing information is deleted. In this case, delete from the connected device the pairing information for the audio receiver, and then pair them again.

If the audio receiver does not operate correctly even after initializing, consult your nearest Sony dealer.