wrote in message
ups.com...
I just bought a used Nakamichi RX-505 and it won't eject or auto-
reverse.
When I press the button, I can hear it engage and the mechanism
responds, but no movement.

I' removed the cover and nothing is showing to be wrong.
Can anyone help?

Thanks,
Terry


If it uses a function motor to raise and lower the mech, I would suspect the
motor is faulty (open internal connection to coils). Seen it before, and the
fault can be intermittent. Try rotating the motor a bit by hand - it might
just take off and run for a while.

As for fixing the motor, that's a tough one but the best "cheat" I've come
up with is to disconnect the motor wires, loosen the motor from it's mount,
and apply an external DC voltage of perhaps 6 or 7 volts and let it run for
at least a couple hours, then reverse polarity and repeat.

The intermittent internal connections result from years of not much usage.
Running it continuously seems to fix them - I've not seen any recalls after
applying this fix. Of course this does NOT apply to shorted motors quite as
well, but I've not seen these types of motors go shorted.

I've also seen this work on MR-1 reel motors for example - and it's SO much
easier than taking out the motor, disassembling it and trying to clean the
tarnish etc off the commutator and risking physical damage to the brushes
etc on reassembly.


Mark Z.