I recently picked up a 2014 4003 bass. The bass sounds and plays better than any previous Ric’s that I’ve owned with the exception of the tone controls for both the neck and bridge pickups. The problem Im having is there doesn’t seem to be any gradual increase (or decrease) in either one of the pots. It’s either full on or off. Even turning up the control slightly sounds as though the control is full on. Same thing when I’m rolling off the tone on either pickup-it’s full on until it’s full off. There’s no variance whatsoever. It’s either full on or full off. What could be the issue and how do I fix it?