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If the motor is directly connected to a mains supply then the chances are that when power was restored it burnt out or damaged the motor itself. Following the mains lead into the unit should answer where the power goes. If it goes to a transformer and it's associated power supply the problem will be found there.
The arm should have a pin through it that secures it to the bracket that is attached to the arm bearing. There should be a long spring that is used to adjust the tracking force and it is underneath the arm.
The arm can be taken off by taking the player apart, unsoldering the wires from the arm and unscrewing the nut on the turntable bearing.
Because the arm mounts to a soft rubber grommet it should feel a little loose.
Hope this helps.
the turntable wont spin unless a record is on the platter,the centre 45 adapter weighs the record to determine 33/45.try pressing 33 and turning the platter by hand(remove expensive cartridge first!),if it starts to spin the motor leaf switch is at fault.is the belt in position.the motor pulley can become unglued.
It could be a belt problem...it could also be a
line voltage problem from the ac coming out of the wall if your record player motor is not syncronous...I remember as a boy some of the cheap little record players I had would change pitch at different times during the day, based on the line voltage varying a little bit coming from the wall plug...
Check to see if your player motor is "syncronous" or some such word....
more than likely it is a mechanical problem...
regarding the physics of how the turntable is driven....
most likely this is the switch that selects among cd/tape/radio/record player. it could be the preamp circuitry in the player as well. it would not be the cartridge UNLESS you cannot see a little rubber 'seat' up inside underneath the cartridge that pushes the stylus tip out and down towards the record just a bit. if this rubber 'yoke' (seat) is missing you will get no sound even when you touch the needle tip when the record player section is selected.
A. Do not try to close the case when there is a record inside!! The fact that the turntable cannot do this is not a design flaw--you'll be hard pressed to find a portable turntable that can close with a record inside because if you were to pick up the player with one inside, it could easily slip off of the spindle and scratch against the sides of the player.
B. Are you using the cueing lever to lift the tone arm before you place it on the record? Read the instructions to see where the cuing lever is (it's a little switch on the right side of the tone arm). When you lift it, the tone arm will lift up and allow you to position it wherever you want on a record, then you depress the lever to make the tone arm touch the record and being playing.
I hope that helps!