On Jul 3, 8:00=A0pm, "Arfa Daily" <arfa.da...@[EMAIL PROTECTED]
> wrote:
> "Ron" <BigELil...@[EMAIL PROTECTED]
> wrote in message
>
>
news:1891bc14-833b-49d3-925e-c49589ea997a@[EMAIL PROTECTED]
> On Jul 3, 4:40 am, "Arfa Daily" <arfa.da...@[EMAIL PROTECTED]
> wrote:
>
>
>
> > "nipperchipper" <nipperchip...@[EMAIL PROTECTED]
> wrote in message
>
> >news:J-SdnUraL6u1MPbVnZ2dnUVZ_hOdnZ2d@[EMAIL PROTECTED]
>
> > > "Ron" <BigELil...@[EMAIL PROTECTED]
> wrote in message
> >
>news:93b8e32f-997a-48b9-91fa-858c504de3b8@[EMAIL PROTECTED]
> > >>I have two Panasonic VCR's, model numbers PV-V4540 and PV-9450.
>
> > >> They are almost idenical on the outside and very simular on the
> > >> inside.
>
> > >> The "newer" model - PV-V4540 - seems to have a head going bad from
> > >> everything I've read.
>
> > >> The PV-9450 works fine, but doesn't have the features that the PV-
> > >> V4540 has.
>
> > >> I would like to install the head unit from the PV-9450 (the older
on=
e)
> > >> in the PV-V4540 (the newer one).
>
> > >> They look the same, but are they the same? And if I swap the
> > >> headunits, will the alignment be the same?
>
> > >> Here are pics of the head units. The one thing that I wondering
abou=
t
> > >> is the "arm" on the center post of the (newer) PV-V4540...what is
> > >> that?
>
> > >> PV-V4540 head unit
> > >>http://i126.photobucket.com/albums/p96/bigelile/IM002417-1.jpg
>
> > >> PV-9450 head unit
> > >>http://i126.photobucket.com/albums/p96/bigelile/IM002411-1.jpg
>
> > >> PV-V4540 face
> > >>http://i126.photobucket.com/albums/p96/bigelile/IM002414-1.jpg
>
> > >> PV-9450 face
> > >>http://i126.photobucket.com/albums/p96/bigelile/IM002413-1.jpg
>
> > > from the parts list pvv4540 uses the beliow listed upper cylinder
hea=
d
> > > VEGS0427 ( A )
> > > VEGS0428 ( B,C,D )
> > > VEGS0429 ( E,F )
>
> > > pv9450 uses
> > > VEHS0571 ( A )
> > > VEHS0570 ( B,C )
> > > VEHS0567 ( D,E )
> > > not much help but swapping may not hurt
>
> > Given that info, it's probably not going to work right. Hifi sound is
> > critical of correct head performance, so if there are any
specification
> > differences between the head drums, there will likely be a problem.
>
> Well, that is an understatement.
>
> Put the head drum from the older working VCR into the newer one, there
> was no signal on the face plate for "HiFi".
>
> So I put it back into the - what was working unit - and NO HiIFi.
>
> Don't know what happened, but the newer VCR fried something in the
> older ones head drum.
>
> Now I have 2 Panasonics that don't work. :(
>
> I feel that to be highly unlikely, as the coupling between the heads and
=
the
> amplification electronics is completely isolated by a rotary
transformer,
> the primary of which is in the upper head drum, and the secondary, in
the
> lower.
>
> Far more likely is that the screw-holes are not offset, and you have
mana=
ged
> to get the upper drums 180 degrees out on the centre spindle. Unscrew
the
> formerly good one again, and try turning it through 180 degrees, and see
=
if
> the holes still line up. If they do, screw it down again, and retest. If
> that gets you back to working, then try your swap again, taking note of
t=
he
> same potential problem.
>
> Arfa
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.........
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