[TechAssist] Re: RCA PTV178L2, FIXED, horizontal lines in picture, tearing at the sides.TIP

  • From: "tvservice" <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 23 Aug 2004 14:50:17 -0500

I have seen many of these PTK178 chassis with coolant leakage.
I was only commenting that may have caused the problem not the silicone.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc

----- Original Message ----- 
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, August 23, 2004 2:29 PM
Subject: [TechAssist] Re: RCA PTV178L2, FIXED, horizontal lines in picture,
tearing at the sides.TIP


> Does the coolant leak cause the silicone to leak through the board?
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of tvservice
> Sent: Monday, August 23, 2004 12:19 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA PTV178L2, FIXED, horizontal lines in
> picture, tearing at the sides.TIP
>
> Look carefully to be sure not a CRT coolant leak
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
> ----- Original Message ----- 
> From: "Kevin" <kevintv@xxxxxxx>
> To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> Sent: Monday, August 23, 2004 1:45 PM
> Subject: [TechAssist] RCA PTV178L2, FIXED, horizontal lines in picture,
> tearing at the sides.TIP
>
>
> > This 52" PROJO had horizontal lines in picture, with tearing at the
> > sides.  There was also a small 'horizontal' noise when the lines were
> > present.  I followed the noise to the deflection board and found black
> > liquid goop on the solder side underneath C4807.  I went to the
> > component side and found C4807, a yellow .22M100 capacitor, held on by
> > only one leg.  The other leg had been eaten away by the black goop,
> > which I am guessing was silicone used to keep C4807 from vibrating.  I
> > cleaned up the board and replaced C4807 (no silicone this time) and
> now
> > there are no more lines or noise.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> >
> >
> >
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