TT motor problems



Some of you may have seen the previous post I made about an Ariston Q deck. I've power it up and there are problems.
The first is, in the forward direction the motor is lifeless. I'm using a 12v, 500mA, regulated power supply. Reversing the poles (found by accident) the motor rotates. But when the plinth and belt are installed the motor is too gutless to drive them.

Also, the plasic bearing cap that supports the spindle has snapped, so the spindle shoulder rests on the top of the bearing. Where can I get parts? (For motor testing I propped this up so the was no resistance on the shoulder).

So, does this indicate a blown motor, some other fault, PSU problem (it's brand new)? And how should I go about fixing it?

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