Panasonic Plasma SD, SU Buffer IC repair

[whiz62]

Re: Panasonic Plasma SD, SU Buffer IC repair

I'm with gdawg when it comes to picture quality. Have been messing with TV's for three years now as a hobby. At first it was LCD's, but this year I have picked up two 42" and one 50" Panasonic TV's not working. I had a 47" Vizio smart TV I repaired in living room and the picture quality drove me crazy. My wife does not notice it at all. I repaired the SS board on the 50" and put it in place of the Vizio and I love it. Just hate that boards are getting scarce and expensive when you can find them. Really appreciate all of you that keep finding ways to keep them running. Thanks.

[martino]

Re: Panasonic Plasma SD, SU Buffer IC repair

I stopped selling sets a long time ago, when you can make more from parts , then the set can be sold for there seems to be no point ? It does come hard to have to part out a working set. but the fact is the parts bring in more money then a two/three year old set.

I agree but having such a hard time gutting a perfectly fine working set.

[smartjohn]

Re: Panasonic Plasma SD, SU Buffer IC repair

Can someone help me find a reasonable priced source for R2A20251 buffer chips? I am trying my hand at repairing a TNPA5534 board from a Panasonic TC-P55ST50 plasma set. The nail polish remover work great at breaking down the RTV silicon. I had a tough time removing the heat sink but I found heating the sink first and then slipping a razor blade under the corner works best at removal. Thanks in advance!

[diif]

Re: Panasonic Plasma SD, SU Buffer IC repair

Can someone help me find a reasonable priced source for R2A20251 buffer chips? I am trying my hand at repairing a TNPA5534 board from a Panasonic TC-P55ST50 plasma set. The nail polish remover work great at breaking down the RTV silicon. I had a tough time removing the heat sink but I found heating the sink first and then slipping a razor blade under the corner works best at removal. Thanks in advance!

I've bought mine from Aliexpress in the past.
This is the video I used to check for a failed chip produced by one of the many TV gurus on here. https://www.youtube.com/watch?v=51SZsfH60EY
The pins need insulating after replacing the chip. I used transformer varnish as recommended by another member on here.
I practised on a scrap buffer first and carefully cut the pins on the old buffer IC with a sharp blade then removed the pins afterwards with my iron.

[vinceroger69]

Re: Panasonic Plasma SD, SU Buffer IC repair

There a quote on toms video regarding buffer ics whats your thoughts regarding this can they cause the odd lines we sometimes see on plasmas and we think there panel faults?

Buffer chips can be still faulty even if they look immaculate and show no beeping from your ohmmeter. You need to make sure there's no double reading in both ways from so-called floating ground plus they can be defective from the inside causing various types of horizontal lines (in that case reading perfect with your meter)