Official comment
@Edwin > What is the type of audio file you're trying to play when unable to enter WIDE range?
The issue with changing range by pressing the MT button may be that you have another button stuck; please try cleaning around the edges of your buttons with a very small amount of rubbing alcohol (ensure the player is UNPLUGGED). If you continue to have issues, it could be there is an issue with that small circuit board and it may need to be repaired / replaced. For that, you should contact Pioneer technical support in your region.