My turntable is not keeping a consistant speed. During transport, the turntable was placed upside down and the platter and belt came off. I remounted the platter and belt and that's when the speed started to become inconsistant. It speeds up and slows down. I have tried adjusting the speed by adjusting the set screws on the bottom of the unit. It speeds up tremendously when I place the jeweler's screwdriver in the adjustment hole, even without turning the screw driver.
I have also noticed that when the tone arm returns after the end of a record, it lowers before it gets to its resting cradle.
What could be causing these two issues and how can I fix?