[TechAssist] Re: Toshiba Tac9815 Shadow mask problem

(this is being reposted with the correct subject line so
knitrngr65@xxxxxxx [name??] can follow his thread.  Guys,
please at least give your names so we all know who you are).

----- Original Message -----
From: "Lawrence Tucker II" <kc4iai@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, December 30, 2001 11:23 AM
Subject: [TechAssist] ShadmaskSolderGunDegauss



Your solder gun is a current transformer with a massive
primary, single
turn secondary. Disconnect the tip if burning it up troubles
you. Trigger
the gun, move it in, and attempt to degauss a small area of
the screen. Turn
the gun so the coil is parallel to the mask. (Hey, you would
have tried that
but non techs do get to read this forum.)

If you are unable to degauss a small area or if the purity
problem returns
to the degaussed area you can suspect the shadow mask
problem.

I have never used this in very large screens. I used it in
monitor size
tubes (up to 21 inch), even those with lightening damage. In
one case a
massive speaker magnet had been stored on top of a composite
montior that
would not self degauss.

A massive magnetism problem will result in all one color or
absence of most
color over a large part of the screen.



>From: knitrngr65@xxxxxxx
>Reply-To: techassist@xxxxxxxxxxxxx
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Toshiba Tac9815 Shadow mask problem
>Date: Sat, 29 Dec 2001 12:21:09 EST
>
>Hello,
>I'm trying to determine if this unit has a shadow mask
problem can anyone
>give me some idea's that I has not been tried.  This is what
I've tried so
>far, degaussing, tapping front of tube, made sure
thyresistor is getting
>warm, ohmed degauss coil, it has continuity, checked for
broken traces.
>Any
>help would be greatly appreciated...
>
>


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