[TechAssist] Re: SONY KV27S42, Squeal

  • From: "Maxwell Bailes Jr." <bailes4@xxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Thu, 14 Feb 2002 18:08:13 -0800 (PST)


Hello all,
I've used a auto mech. stethoscope with a plastic tip.
I've had very good luck pin pointing the trouble. Just
my 2 cents.
Max 
--- Premium Technologies <premtech@xxxxxxxxxxxxxx>
wrote:
> 
> Hi Walt,
> I second that idea of pin-pointing the cause using
> something to stethoscope
> the location.  I've even use a piece of paper
> rolled-up in a cone. Small end
> in your ear passing the larger end over the
> suspected areas. (So much for
> the low-end line tools of the trade).
> You might also check the deflection yoke which could
> be causing the feedback
> squeal your describing.
> Hope this helps
> Bill
> 
> Premium Technologies
> 27501 V Street
> Ocean Park, Washington 98640
> Phone: (360) 665-5984
> Fax:      (775) 860-7747
> email:  premtech@xxxxxxxxxxxxxx
> ----- Original Message -----
> From: "al.L" <al@xxxxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, February 14, 2002 12:24 PM
> Subject: [TechAssist] Re: SONY KV27S42, Squeal
> 
> 
> >
> > Hi Walt, HTHAY?
> >       If its almost at the end of our hearing
> range its probably the
> > flyback, a rubber hose should pinpoint the
> component,hold it to your
> > ear.Also heard good reports on stethoscope. Good
> luck. al
> >
> > alleathe@xxxxxxxxxxxxx
> > Al Leatherman
> > Mine Hill, NJ 07803
> > 973-361-5796
> > ----- Original Message -----
> > From: <Wallyusmc1@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, February 14, 2002 2:08 AM
> > Subject: [TechAssist] SONY KV27S42, Squeal
> >
> >
> > >
> > >
> > >
> > >
> > >
> > > Hi all,
> > > This set has a high pitched squeal when the
> chassis is torqued and when
> it
> > is
> > > in the set.  If I twist the set the squeal will
> com and go, however,
> when
> > I
> > > press on the circuit board near the SMPS while
> twisting the squeal
> > > disappears.  The set has had this problem for a
> long time and was
> serviced
> > by
> > > a SONY Service Center last year.  They couldn't
> find the cause of the
> > squeal
> > > and placed a wedge under the chassis. Any help
> would be appreciated.
> > > Walt
> > >
> > >
> > > Walt Chambers, LtCol, USMC (Ret)
> > > Walt's TV/VCR Service
> > > 3753 Mission Avenue, STE 117
> > > Oceanside, CA 92054
> > > Ph 760-966-1213
> > > Fax 760-966-0891
> > > Mailto:wallyusmc1@xxxxxxx
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=====
Max Bailes
Bailes Electronics
Rt.4 Box57-A
Hurricane,WV. 25526
304-562-7167

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