[TechAssist] Re: toshiba cf27h50 shadow mask

To the originator of this message,

Manual degaussing of the CRT is such a common thing that many of us who
have been doing it for thirty years it's a natural process like
breathing.  We forget the technique is a learned process like anything
else.

While there is no "only one way to do it," here is what I do.  With the
TV on, locate the degauss coil parallel to the screen and turn on power
to the coil.  (Some cheapies don't have a switch.  If so, plug in the
coil)  Move the coil in a circular motion over the face of the CRT for
maybe 10-20 seconds.  Gradually move the coil away from the CRT to a
distance of at least 4 feet.  Turn the coil perpendicular to the face of
the CRT and turn off or remove power from coil.  This step is important
so that the collapsing magnetic field not re-magnetize the CRT.

From the previous discussion, I strongly believe the shadow mask is
damaged and no repair is possible.

To the tech who suggested using a solder gun to degauss a CRT.  Sounds
good.  Just one thing.  Some of us no longer even own one anymore!   Used
to buy the Weller 440 at about $15.  Last I heard, a FAR less quality
product was about $100.  About as rarely used as a Simpson 260 now.  I
have used (in a pinch) a ladies hair dryer to degauss a CRT.  (No
heat--just using the magnetic field from the motor.)

Hope this helps,


Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL  32561
850-934-8324 (Voice) 850-932-0819 (Fax)

------------------------


On Sun, 30 Dec 2001 09:26:44 -0500 "Jeff Dougherty"
<jeff@xxxxxxxxxxxxxxxxxx> writes:
> 
> [You know our name...what's yours?]
> You didn't forget to gradually move the coil away from the set, did 
> you?
> Start at a distance of 6 ft, or so, move close, then move about 6ft 
> from the
> set, unplug the coil.
> 
> Jeff
> HAPPY HOLIDAYS:PEACE ON EARTH
> mailto:Jeff@xxxxxxxxxxxxxxxxxx  www.9-11-2001tragedy.com
> FAX 1-413-280-0677
> Intrepid Video & Electronics
> Harrisburg, PA 17111
> 717-909-8844
> www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> ----- Original Message -----
> From: <knitrngr65@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, December 29, 2001 9:53 PM
> Subject: [TechAssist] Re: toshiba cf27h50 shadow mask
> 
> 
> > Bill,
> >
> > I like your experiment, but it didn't work.  When I degauss the 
> unit with
> the
> > handheld degaussing ring, the screwed up colors never dissappear.  
> Do you
> > have any other ideas, I sure would appreciare your input.....
> >
> >
> >
> > In a message dated 12/29/01 11:51:08 AM US Mountain Standard Time,
> > billmcfarland@xxxxxxxxxxxxxx writes:
> >
> >
> > > OK, This is what I do.  It may be wrong...But it was how I was 
> taught.
> > >
> > > Start with unit in a Cold Start State.
> > >
> > > Step 1 With Unit off--Disconnect the internal Degauss coil. Turn 
> unit
> on.
> > > Step 2 Degauss using your handheld coil.
> > > Step 3 Let the unit warm up 15 or 20 min.
> > > Step 4 Turn off unit and let sit off for about 10 min. DO NOT  
> MOVE THE
> > > UNIT.
> > > Step 5 Turn unit back on.
> > >
> > > If the Purity problem comes back during the warm up or when you 
> turn it
> on
> > > the second time. The Shadow Mask is loose.
> > > Its also important not to move the unit after you degauss with 
> the
> handheld
> > > coil. The earths magnetic field can mess with the experiment.
> > >
> > > Like I said. This could be completely off base. But It works for 
> me.
> (Has
> > > far as I know anyway!)
> > > I am sure there are people on this list who have a better way or 
> know
> more
> > > about it then I.
> > > Just thought I would Run this up the flag pole and see anyone 
> salutes!
> > >
> > > Good luck, God Bless, Happy Holidays
> > > Bill McFarland
> > > DMC Electronics
> > > ----- Original Message -----
> > > From: <knitrngr65@xxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, December 28, 2001 4:18 PM
> > > Subject: [TechAssist] toshiba cf27h50 shadow mask
> > >
> > >
> > > > Maybe someone can tell me, how to determine if the shadow mask 
> has
> broken
> > > > loose.  I tried the only way I know, and that is if you have a
> discolored
> > > > screen ( blue, purple weird colors), and the colors don't go 
> away
> after
> > > > degaussing.  Also I tried tapping on the front of the screen 
> to see
> some
> > > kind
> > > > of movement in the shadow mask, didn't help.  Can someone give 
> me some
> > > > advice, sure would appreciate it....
> > > >
> > > >
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