I have a JVC AL-F350BKX turntable. The belt wasn't installed so I took the plate off to install the belt and it is very loose, and won't turn the plate. The motor turns and everything else seems functional. My question is do I need to replace the belt or am I missing some sort of belt tension adjustment or something of that sort. The belt only goes around the plate and motor shaft. On the motor there are 2 holes that may have had some pins to give the belt more tension?, does anyone with a turntable have this. I'm not to familiar with turntables and I don't have the manual. Thanks.