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From: hr(bob) hofmann on 28 Dec 2009 00:54
Just had a Sony Model KV-1380R given to me a couple of days ago. Only
problem is simultaneous but intermittent horizontal and vertical
shrinkage of about 20%, on a random basis. Removed the set back,
problem is still intermittent, but appears to be less frequent. Tried
beating on anything related to power supply, both in normal and
trouble modes, no effects. I suspect something in the power supply
since both H & V are affected. Currently running the set with a
voltmeter on B+ which is running about 155V, waiting for something to
go wrong. But I can't sit around watching the set, just check it
intermittently. Anyone had similar problems with this or similar
Sonys. Photofact folder is 2564, putting manufacture date at sometime
in 1987 or early 1988. If anyone has a pdf of this folder, please let
me know.
From: Phil Allison on 28 Dec 2009 01:31

"hr(bob)
>
> Just had a Sony Model KV-1380R given to me a couple of days ago. Only
> problem is simultaneous but intermittent horizontal and vertical
> shrinkage of about 20%, on a random basis. Removed the set back,
> problem is still intermittent, but appears to be less frequent. Tried
> beating on anything related to power supply, both in normal and
> trouble modes, no effects. I suspect something in the power supply
> since both H & V are affected. Currently running the set with a
> voltmeter on B+ which is running about 155V, waiting for something to
> go wrong. But I can't sit around watching the set, just check it
> intermittently. Anyone had similar problems with this or similar
> Sonys.


** Might be an idea to change any caps, varistors etc connected to the yoke.

An intermittent short in one could affect the pic size like you say.


...... Phil


From: Sylvia Else on 28 Dec 2009 04:13
hr(bob) hofmann(a)att.net wrote:
> Just had a Sony Model KV-1380R given to me a couple of days ago. Only
> problem is simultaneous but intermittent horizontal and vertical
> shrinkage of about 20%, on a random basis. Removed the set back,
> problem is still intermittent, but appears to be less frequent. Tried
> beating on anything related to power supply, both in normal and
> trouble modes, no effects. I suspect something in the power supply
> since both H & V are affected. Currently running the set with a
> voltmeter on B+ which is running about 155V, waiting for something to
> go wrong. But I can't sit around watching the set, just check it
> intermittently. Anyone had similar problems with this or similar
> Sonys. Photofact folder is 2564, putting manufacture date at sometime
> in 1987 or early 1988. If anyone has a pdf of this folder, please let
> me know.

Does the picture brightness remain the same?

Sylvia.
From: Mark Zacharias on 28 Dec 2009 06:22
"hr(bob) hofmann(a)att.net" <hrhofmann(a)att.net> wrote in message
news:af21303e-1cc2-4fe4-b139-966e7c33b0bf(a)h9g2000yqa.googlegroups.com...
> Just had a Sony Model KV-1380R given to me a couple of days ago. Only
> problem is simultaneous but intermittent horizontal and vertical
> shrinkage of about 20%, on a random basis. Removed the set back,
> problem is still intermittent, but appears to be less frequent. Tried
> beating on anything related to power supply, both in normal and
> trouble modes, no effects. I suspect something in the power supply
> since both H & V are affected. Currently running the set with a
> voltmeter on B+ which is running about 155V, waiting for something to
> go wrong. But I can't sit around watching the set, just check it
> intermittently. Anyone had similar problems with this or similar
> Sonys. Photofact folder is 2564, putting manufacture date at sometime
> in 1987 or early 1988. If anyone has a pdf of this folder, please let
> me know.


Check for a bad 33uF 160 volt capacitor in the power supply.

Mark Z.

From: hr(bob) hofmann on 28 Dec 2009 15:57
On Dec 28, 3:13 am, Sylvia Else <syl...(a)not.at.this.address> wrote:
> hr(bob) hofm...(a)att.net wrote:
> > Just had a Sony Model KV-1380R given to me a couple of days ago.  Only
> > problem is simultaneous but intermittent horizontal and vertical
> > shrinkage of about 20%, on a random basis.  Removed the set back,
> > problem is still intermittent, but appears to be less frequent.  Tried
> > beating on anything related to power supply, both in normal and
> > trouble modes, no effects.  I suspect something in the power supply
> > since both H & V are affected.  Currently running the set with a
> > voltmeter on B+ which is running about 155V, waiting for something to
> > go wrong.  But I can't sit around watching the set, just check it
> > intermittently.  Anyone had similar problems with this or similar
> > Sonys. Photofact folder is 2564, putting manufacture date at sometime
> > in 1987 or early 1988.  If anyone has a pdf of this folder, please let
> > me know.
>
> Does the picture brightness remain the same?
>
> Sylvia.

Yes, the brightness does not change. So far today the picture has
been ok every time I looked at it.
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