Newsgroups: sci.electronics
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From: ttrueger@athena.mit.edu (Timothy T. Rueger)
Subject: Re: Sony TV Hi-Pitch squeal
Message-ID: <1991Jun9.200549.24140@athena.mit.edu>
Summary: clothespins to the rescue! 
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Organization: Massachusetts Institute of Technology
References: <1991Jun3.150425.4892@news.larc.nasa.gov> <1991Jun3.163755.825@hubcap.clemson.edu> <1991Jun7.030706.85@cmkrnl.uucp>
Distribution: usa
Date: Sun, 9 Jun 91 20:05:49 GMT
Lines: 26

In article <1991Jun7.030706.85@cmkrnl.uucp> jeh@cmkrnl.uucp writes:
(Regarding a squealing TV...)
>horizontal-sweep squeal (note spelling) can be very difficult and expensive to
>track down and fix... particularly since many technicians can't hear it!
>
>The source may be the flyback transformer, the deflection yoke, or even a
>printed circuit board (not necessarily components on the board, but the board
>itself).  Someone else mentioned capacitors.
>
>Once you find the offending part, then what?  If it's something like a
>capacitor or a PC board, you may be able to tie it down or wedge it or
>something so that it can't vibrate.  

And that is exactly how I solved my particular TV squeal.  I found the
offending part, and wedged a wooden clothespin (!) between the part and the
picture tube.  A low-tech solution if ever there was one.  When it
fails, I'll finally break down (ugh...) and get a new set.

>	--- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA

-Tim
_______________________________________________________________________
Tim Rueger - TA, 6.775 - Analog MOS Design
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