I have a vintage Yamaha CR-820 receiver. I have a vintage JVC direct drive turntable model L-A55. The receiver plays crystal through my BIC America DV-62si bookshelf speakers. However, when I plug the turntable into phono 1 or 2, the sound is distorted and scratchy sounding. It's not the quality of the record. I don't think it is the needle since it is supposed to have a relatively new diamond needle in it. What could be causing the distortion? Thanks for the help.