Check the arm for excessive bearing "play". Gently take the thumb and forefinger and see if the arm rocks from side to side. The arm headshell should be square to the platter looking head on and not cocked to one side.
Check the internet for an original manual. If the unit is undamaged, you can tighten the bearings and lubricate it properly and make the damping work correctly.
Check the internet for an original manual. If the unit is undamaged, you can tighten the bearings and lubricate it properly and make the damping work correctly.