on 02/09/2009, Bob Mannix supposed :
When it's buzzing, give the motor a tweak by hand. If it then runs, it's an
induction motor and the starting capacitor has blown. If it doesn't, the
brushes may have stuck or something.

They are not, so far as I know, a capacitor start motor, nor have they
any brushes - just a straight DOL induction motor.

I have one similar if not the same. Try taking the drive belt off and
see if the motor runs without the belt. Is the buzzing definitely
coming from the motor, rather than the NVR's coil? If from the NVR, it
could be
that some dirt or etc. is preventing it closing fully.

I seem to remember there is an interlock on the belt drive cover, to
prevent it running with the belt exposed.

If you are still stuck, keep in mind that the 12 month limit on the
guarantee means nothing much. The law now allows you to return faulty
goods up to six years after purchase, 2 hours use is not what a
reasonable person would expect from such an item.



--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk