[JAS1169]

I believe the volume control on my radio is broken. I initially believe the knob was broken so I order a new one. However, after pulling the old one off it appeared (the old knob) ok. I then spayed wd-40 on the control arm (saw this on youtube) which did nothing. However, when spinning the control rod I notice there was no stop on either high or low and would spin endlessly in either direction. Can someone check by spinning their volune knob right and then left....is their a stop or do they spin endlessly in either direction???