[TechAssist] Re: RCA P52937 PTK195M4 Intermittent bow (top and bottom)
- From: "jonas miglinas" <miglinasj@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 10 Jun 2005 21:53:33 -0500
Hello all,
I waited over three weeks to post this fix because I wasn't sure if what I
did repaired this set. Replacing the convergence power supply (with a known
good one) did not help, set would still bow in whenever the mood strikes it.
I ended up doing the shotgun approach. I spent about two hours taking out,
and cleaning the glue from every smd capacitor on the amplfier board. It has
been playing well since.
I know it would have been easier to change the amplifier board, but the
client was on the teeter as to whether repair or buy a new set.
Thanks to Robert and Phllip Hull for their insight.
Jonas Miglinas
Miglinas TV
Chicago
----- Original Message -----
From: "tvservice" <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, May 16, 2005 8:38 AM
Subject: [TechAssist] Re: RCA P52937 PTK195M4 Intermittent bow (top and
bottom)
> replace the convergence power supply board #250686
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
> ----- Original Message -----
> From: "jonas miglinas" <miglinasj@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, May 15, 2005 10:53 PM
> Subject: [TechAssist] RCA P52937 PTK195M4 Intermittent bow (top and
bottom)
>
>
> > Hello all,
> > This set has been kicking my butt for about two weeks now. Set will bow
in
> from top and bottom whenever the mood strikes it. If you turn the set off
> and then on again, the bow is gone. When it goes out, I am missing the the
> +/- 45 and +/-15 volt supply from the convergence power supply. The
23volts
> is there. I have resoldered both the power supply and the amplifier
> board(there are times when I tap the amplifier module the bow appears).
> > Freezing neither makes the bow appear or disappear.
> > I have scraped the glue from C19706 as was suggested from another post,
> but no help.
> > I suspect that a cap is leaking to ground, but not sure just where to
> start.Could something in the amplifier module cause the +/- 45 and 15 volt
> to disappear?
> > Any insight or suggestions is appreciated.
> >
> > Jonas Miglinas
> > Miglinas TV
> > Chicago
> >
> >
>
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