NSM JUKEBOX PROBLEM

MY NSM FESTIVAL CAN BE PLAYING FINE THEN SUDDENLY SLIPS FROM THE CENTRE OF THE RECORD,WHICH MAKES AN AWFUL SOUND.I CAN REPOSITION IT MANUALLY BUT IT IS GETTING MOST ANNOYING,ANY IDEAS?

Did you check the tonearm springs?

I know NOTHING about NSM's, so this is only a guess--If no one has "messed" with the tone arm adjustments, the wire has become "stiff" and needs replacing. Ron Rich