[TechAssist] Re: RCA PTV P46151WK, Odd Problem, FIXED

From: "AURTRON" <Aurtron@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Date: Tue, 1 Jan 2002 11:20:02 -0500
Ken
The last RCA I worked on [projection] had same arcing problem. Found the
contaminant was coolant from tube. RCA does not support repair of tube,
gasket not available. Found other two tubes had same problem to lesser
degree.  Good luck......

Don
----- Original Message -----
From: <gulftech@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Cc: <techassist@xxxxxxxxxxxxx>
Sent: Monday, December 31, 2001 10:01 AM
Subject: [TechAssist] Re: RCA PTV P46151WK, Odd Problem, FIXED


>
> Dennis,
>
> MEK.  The I tried soap and water--no good.  Ditto for alcohol.  Oh, yes,
> I used the MEK in a well-ventilated environment!
>
> I should have stated that this is a PTK169.
>
>
> Ken Smith
> Gulf Technical Services
> 3034 Gulf Breeze Parkway
> Gulf Breeze, FL  32561
> 850-934-8324 (Voice) 850-932-0819 (Fax)
>
> -----------------
>
>
> On Sun, 30 Dec 2001 17:35:28 -0800 Dennis Viereck <wa6ati@xxxxxxxxxxxxxx>
> writes:
> >
> > What did you use to clean the messy compound from the bumpers?
> > Dennis
> >
> > gulftech@xxxxxxxx wrote:
> >
> > > Friends,
> > >
> > > I haven't posted this as a problem before, because I couldn't
> > identify
> > > the problem well enough to ask for help.  After many, many hours
> > of work
> > > and two failed attempts to return the light box to the customer,
> > the set
> > > is finally fixed and I hope this will help others in the future.
> > >
> > > The set came in with the complaint of instant shutdown.  The green
> > CRT
> > > was arcing at the second anode.  There appeared to be a contaminant
> > > spilled in the area.  Cleaning and RTV appeared to repair the set.
> > >
> > > Took lightbox back to customer.  Found light horizontal lines,
> > almost
> > > like retrace on all three CRT's.  Had not seen in shop.  Also,
> > appeared
> > > to have a slight sync problem.  For example, bring up convergence
> > > crosshatch, vertical lines had slight "s" shape in middle.
> > >
> > > After many hours of troubleshooting and failed attempts, tried PIP
> > pix.
> > > PIP image was totally out of sync, like is typical of Mitsubishi.
> > Pulled
> > > the PIP module.  It had three rubber bumpers to isolate the pcb
> > from the
> > > shield.  These bumpers had melted like Hershey's Kisses.  What a
> > mess!
> > > Also found seven bad caps.  For the record:  C424, C425, C426,
> > C501 (all
> > > 15ufd, 50V), C318/.47@50, C518/10@50, and C121/25@100.  Most of
> > these
> > > caps check good with a normal cap meter, but high ESR.
> > >
> > > Set works fine now.
> > >
> > > Ken Smith
> > > Gulf Technical Services
> > > 3034 Gulf Breeze Parkway
> > > Gulf Breeze, FL  32561
> > > 850-934-8324 (Voice) 850-932-0819 (Fax)
> > >
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Follow-Ups:
- [TechAssist] Re: RCA PTV P46151WK, Odd Problem, FIXED
  - From: DEVROUGH GROUP
[TechAssist] Re: RCA PTV P46151WK, Odd Problem, FIXED

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