On Jul 4, 4:24=A0am, "Arfa Daily" <arfa.da...@[EMAIL PROTECTED]
> wrote:
> <snip>
>
> >The upper drum(s) can only go on one way. It has a pilot hole for a
> >guide and the screw holes are also slightly offset.
> >Don't know what happened, but switching them fried something in either
> >the units themselves, or in the upper drums.
> >*Both* units with their original heads have video, but the audio is
> >muddy. I cleaned both using the fingernail method you mentioned,
> >followed up with paper and alcohol, no change.
> >Oh well.........
>
> OK. Well the offsetting of the screw holes is what I had expected, so I
> really don't know what you can have done. I can't think of any way that
> either set of heads, let alone both, can have been damaged by simply
> swapping them between machines. Even if one set had much more 'robust'
> windings to take a higher bias current on record, they should at least
ha=
ve
> survived in the other machine. It's been a while since I did much work
on
> VCRs as they have not been popular here for a couple of years now, but
> 'muddy' is not a description that I would normally have found a way of
> putting to a hifi sound track. Usually, this track has a tendency to
drop
> out completely when the heads wear, and the machine reverts back to the
> linear sound track, which can be muddy if the A/S head is not properly
> aligned. You said before that you had altered the setting of the supply
> guide roller. Have you tried making sure that you have that back in
exact=
ly
> the right place ? As I think I pointed out earlier, correct recovery of
t=
he
> hifi sound track is critical of several factors.
>
> Arfa
I never touched the roller guides on the older VCR that worked fine.
All I did was remove the upper drum (or whatever it's called) and
install it on my "newer" Panasonic.
There was no HiFi audio icon on the newer unit with the older drum
unit.
So, I removed it, and reinstalled it on in the unit it came from and I
now have muddy/humming audio.
And vice-versa.
|
