Question about Standard (CRT) Televisions

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Rca arcing and hissing

Premtech, you helped me with my anote? cap problem- I followed ur instructions and am waiting for rubber sealant to dry. I heard a tiny spark when I pryed the cap off but no big shock. I cleaned it up a little, sealed it, and put it back on. It seems I'm missing a step? was I supposed to replace it? or follow it back to the flyback transformer? I basically took it off and put it back on, is that right?

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  • adamwes Apr 05, 2008

    Bill, I used rubber sealant-probabley not good right? I called 3 places abput HV-mouser and they suggested rubber sealant. Will it work or should I definatley hold out for HV? By-the-way, thanks for taking the time to steer me in the right direction-it's actually very interesting-lots of parts to screw up. Thanks again

  • adamwes Apr 05, 2008

    Bill, here is what i figured out. I tuned off the lights to see where it was sparking. It's not up by the cap but much lower on one of the green boards. there is this brown 2" cylinder that has it's top blown off. It has small writing on it (KHA-250 V underneith that it says 100 then a weird squiggle then F. It has even smaller letters like 105 D C then (8) 2 7 F or something like that. Wiggled it a little to see if it would pull out-must be soldered in. Any Ideas besides I'm screwed?

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Bill,
Most likely 100 mf / 250 v 105 degree capacitor......soldered in,
of course...................T.
How about a Model # and location?

Posted on Apr 06, 2008

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Just remove it - put a small ring of HV putty on and reseal the cap making sure to get the anode inside the well securely...
There is no drying time to HV putty, are you sure that's what you used?? It's a clear and rubbery kinda like silly putty, easy to form.
Bill

Posted on Apr 05, 2008

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When i turn it on it makes a screeching noise


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Rca arcing and hissing


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Hi.

Don't know what happened to the last post I sent you its disappeared.

What I think you should do is definately replace the CRT white socket (tube base plug).
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Is the CRT made by LG / PHILIPS. These are notorius for for arcing over internally I must write at least 1 A week off for this problem.

If you can still run the set try tapping the neck of tube with screwdriver handle if pic flashes or goes predominately1 colour you are looking at the tube with internal short.

If this is the case there are ways of trying to get rid of the internal short let me know what you find ?

http://dysonmanuals.llc.nu/

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1 Answer

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Your problem is due to moisture in the the Crt base socket you will need to replace the white plastic crt plug I have tried to clean & dry them out but it never fully corrects problem.

As far as the pins & glass crt neck goes clean them with Isopropyl alcohol this will thoroughly clean all the carbon off.

http://dysonmanuals.llc.nu/

Chris..

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4 Answers

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<<<>>


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