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

From: gulftech@xxxxxxxx
To: techassist@xxxxxxxxxxxxx
Date: Mon, 31 Dec 2001 11:16:21 -0600
Guys,

I must have done a poor job of describing the mess.  The rubber melted,
like VCR's with old belts that turn to tar.  I tried Windex on the mess
left on the shield.  WD-40, being petroleum based, may have worked, but
the MEK softened up the larger "globs" so I could peel them off with a
dental tool.  The long streaks where the globs ran had to be removed by
vigorous cleaning (with MEK).

The main point of the post is that I made the ASSUMPTION that the set had
only one problem (the CRT arcing causing shutdown) and that the lines
were related to the work we did.  We even changed out the splitter,
thinking the arcing had damaged the splitter.  It's always AFTER a battle
like this that the customer says "Oh, yes, those lines have been there
for months before it died."


Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL  32561
850-934-8324 (Voice) 850-932-0819 (Fax)

-----------------------


On Mon, 31 Dec 2001 16:11:51 +0000 "Eric Gundersen"
<redwitch01@xxxxxxxxxxx> writes:
> 
> A Good ammonia based window cleaner works well on most residue from 
> most 
> surfaces
> 
> Eric g
> 
> 
> >From: Gary McCartney <number63@xxxxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: techassist@xxxxxxxxxxxxx
> >Subject: [TechAssist] Re: RCA PTV P46151WK, Odd Problem, FIXED
> >Date: Mon, 31 Dec 2001 11:08:20 -0500
> >
> >
> >I use WD-40 to clean up all kinds of sticky glue left behind from
> >stickers, etc. Maybe it would work for these rubber pads too.
> >
> >
> >
> >Gary McCartney
> >
> >McCartney Electronics
> >7134 Fife Rd, RR 7
> >Guelph Ontario Canada N1H 6J4
> >Fax: (519)821-1530
> >email: number63@xxxxxxxxxxxxx
> >
> >
> >
> >
> >
> >
> >gulftech@xxxxxxxx wrote:
> > >
> > > 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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> 
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[TechAssist] Re: RCA PTV P46151WK, Odd Problem, FIXED

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