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From: default on 5 Jun 2010 08:51
On Fri, 04 Jun 2010 21:26:40 -0700, Tim Wescott <tim(a)seemywebsite.now>
wrote:

>Do you have kids? "Hidden magnet" just made me think of that for some
>reason.
>
>Just fix the dang thing.

No kids or magnets that I see. Speakers inside the set have magnets
no doubt.

Fixing is a less desirable option. Ages ago I repaired TVs for a
living. Good chance that if it needs any part it will have to be
ordered, since there are no parts outlets around here. It is a large
beast. Could just be a fuse . . .
--
From: stratus46 on 5 Jun 2010 20:53
On Jun 5, 5:32 am, default <defa...(a)defaulter.net> wrote:
> On Fri, 4 Jun 2010 20:40:52 -0400, "Tom Biasi"
>
>
>
>
>
> <tombi...(a)optonline.net> wrote:
>
> >"default" <defa...(a)defaulter.net> wrote in message
> >news:ht2j0658sslr81b2rpkd9ur52cjccd9a8r(a)4ax.com...
> >> On Fri, 04 Jun 2010 12:22:17 -0700, John Larkin
> >> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>
> >>>On Thu, 03 Jun 2010 20:16:52 -0400, default <defa...(a)defaulter.net>
> >>>wrote:
>
> >>>>Do all TV's have built in degaussing coils these days?
>
> >>>>I have a CRT style TV that's been in service for ~ 4 years and it has
> >>>>been gradually losing  "color purity" mostly on the bottom edges in a
> >>>>circular pattern - center good.
>
> >>>>I can null out the green or magenta it favors and correct the color by
> >>>>holding a piece of non-magnetized iron in just the right place in
> >>>>front of the screen, one corner at a time, so I'm fairly sure it is a
> >>>>problem with a magnetized chassis or color mask.
>
> >>>>I've never heard a 60 cycle buzz when the set fires up the way normal
> >>>>degaussing circuits sound,  but didn't think anything of it until the
> >>>>purity started to go out.  Could I have skated this long without a
> >>>>problem with no built-in coil?  And can they make them totally silent?
>
> >>>>Plan A is to whip up a manual degaussing coil.  I have 5,000 feet of
> >>>>24 AWG and figure 3,000 feet on a 14" diameter coil will have a
> >>>>reasonable impedance and use ~60 watts.
>
> >>>>Plan B is to fix the set
>
> >>>Do you have a soldering gun? They are good degaussers.
>
> >>>John
>
> >> Thanks
>
> >> I do, and tried that.  Winding a coil and connecting it in place of
> >> the tip may be a winner.  The gun alone, with a regular soldering tip,
> >> tried in all orientations, did help - the side bands are almost gone
> >> and the center (where I didn't think there was a problem) looks
> >> better.
>
> >> But there are still two pesky areas on the bottom corners.  If I
> >> didn't know better, I'd be looking for a hidden magnet.
>
> >> --
>
> >Just fix the TV.
>
> Now where's the fun in that?  It is a big beast and I don't want to
> move it.
>
> Calculating the inductance for a degausser is more rewarding than
> poking about in TVs.  
> --

We had a cheapy Daewoo set for the kids where the degausser failed. It
has a relay on the main board that flexes the contacts slightly when
it actuates. The solder joint eventually failed and all it took to
restore it was to clean off the remaining solder and re-solder it.
Works fine again.

G²
From: Rudolf.Zeitschek on 6 Jun 2010 06:10
default schrieb:
> ....> Fixing is a less desirable option. Ages ago I repaired TVs for a
> living. Good chance that if it needs any part it will have to be
> ordered, since there are no parts outlets around here. It is a large
> beast. Could just be a fuse . . .

unlikely, PTC is more likely.

Some time ago, I had a similar problem:
Built in degaussing didn�t work and the PTC sat inaccessible below the
very large CRT (>30").
I took the degaussing coil and circuitry (which was fortunately on a
seperate print) from an old set set, which was scrapped at this time.
I held the coil in front of the TV and moved it away slowly, the way it
was done before built-in degaussing was standard (prior to ~1960)
(I know this from american literature only, the first color-TVs in
central europe allready hat built-in degaussing (~1967)

greetings, Rudolf
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