Mailinglist Archive: opensuse (4547 mails)

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Re: [SLE] short fizzing sound
  • From: Vince Littler <suse@xxxxxxxxxxxxxxxxxxxxxxxxx>
  • Date: Mon, 17 May 2004 20:57:46 +0100
  • Message-id: <200405172057.46398@xxxxxxxxxxxxxxxxxxxxxxxxxx>
On Monday 17 May 2004 8:36 pm, The Purple Tiger wrote:
> On Monday 17 May 2004 19:32, Thom Nuzum wrote:
> > Yes its CRT.
> > I think you must be right as I have tried everything else.
> > How can I clean this without dying.
> > Thanks


> If you do feel confident about removing the case of your monitor (I have
> done this faaaar too many times :) then move the monitor to a solid
> work area, preferably wooden.
> Leave it for 10-15 mins for the capacitors to discharge fully.
> Lay a cloth/towel on the surface and lay the monitor CAREFULLY on its
> front (glass) end.
> Remove all the screws and carefully remove the back casing. You may
> have to feed the cabling through the holes in the case.
> Using a can of pressurised air and a soft paintbrush (for those stubborn
> CIRCUIT BOARD OFF THE BACK OF THE TUBE. Be careful not to move any of
> the components on the boards too - most of them will stand up to light
> brushing.
> When you have finished your internal renovation work, carefully slide
> the case back on (remembering to feed the cables [if required] as you
> go).
> Put your screws back in.
> Leave 10 mins for the dust to settle.
> Plug and pray :)
> If the problem persists after the second option then either you didn't
> do a very good job, or a component part is on its way out. I have had
> one go bang after it had been fizzing for a while, but I have yet to
> break a monitor by taking it apart :g:.
> Just make sure it has been off for a little while (and by that I mean
> that it has no power lead connected!) to make sure that all the
> electricity is discharged from it.


If being of sound mind, you go this way, don't just remove the power lead,
remove all leads. The CRT is a 20kV capacitor in its own right. You don't
want it to find one end connected to ground via an audio lead or similar,
because that will make the other end of the capacitor [the HT lead, where you
are likely to find all the dust] 20kV relative to your fingers.

If this advice is not obvious to you, or you don't understand it any way, then
take the job to a TV repair man. The symptoms, [hissing and resizing of
image] are bread and butter to them.



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