Although it is of course true that the drive mechanism is magnetic, there is a
little plastic part in 1200's which does have gears in it, and which does have
something profound to do with the operation of the drive shaft. I have no idea
what it does, but when it doesn't do it right, things go awry. My table just
ground to a halt and it was this very part which was the culprit. If you like I
can send you schematics off list (they are very pretty). The files are too big
for IDM. Hope my vague knowledge is of some use.
Cheers,
Christophe
Brock Suter wrote:
quoted 25 lines Kevin Sample wrote:
> Kevin Sample wrote:
>
> > i've had similar problems with my direct-drive JVC table (JL-A40). a table
> > geek at the local vintage electronics shop recommended i flip the table
> > over, pull off the bottom panel, and re-lube the drive gears (to which you
> > should have easy access after removing the panel). it actually worked--it
> > stays on pitch MOST of the time now and hardly fluctuates at all.
> >
> > make sure you use some type of plastic-safe GREASE, though. NO WD-40! i
> > used Vaseline, believe it or not. ;)
> >
> > HOWEVER, if that doesn't fix it, there's possibly a more serious problem
> > with the drive assembly. i'd take it to a repair shop if that's the case.
>
> 1200's don't have gears, the drive mechanism is magnetic.
>
> I've see plenty old ones wobble randomly.
>
> A trip to a tech will sort it out.
>
> brock.
>
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