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Panasonic TX-P50VT30B - 7 Flash issue.

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downunder:

Hi Chris,

You must have put a hex on me. A TH-P50ST30A plasma just wandered into my workshop with code 7. Five of the screw holes had been arcing and the SC board is cactus. Found around 5 shorted FETs. I have a donor board so I'll try to refurb it if I can't find a reasonably priced replacement.

Bruce

Turnip:
Hi Bruce,

Checked about for kits and got the Ebay one for £20 inc. Other folks do a more comprehensive kit featuring bits which appear OK on my board - Guess the genuine Pana Kit.

Ebay kit
D401 (RF1501) D421 (DAF30a)  Q401 (30F131)  Q402 (30F131)  Q403 (30F131)
Q421 (RJP30H2A)  Q422 (RJP30H2A)  Q423 (RJP30H2A)  Q531 (B1HFPFA00001)  IC502 (COZBZ0001822)

Suspect as you said, good chassis connection is the biz - Good luck - Chris.

downunder:

Hi Chris,

So today I took the bull by the horns. Found Q401, Q422, Q423 and D401 shorted, so I transferred them from a donor board I had (to avoid cheap underrated fakes. Cleaned up the screw holes and gingerly turned the TV on. Code 7 was replaced with code 8 (SS board). Found Q102 (RCJ330) shorted on the SS board. New FET and away it went. Ran it for a day all OK. Out of interest I checked a second SC board I had, but alas, it had 6 X 30F131s  and 2 X Diodes short, almost all the semis down the entire centre strip. Don't fancy my chances.

Bruce

Turnip:
Hi Bruce, well done.

Took me a week to get around replace the bits, especially that tiny chip and dual transistor thingy, as eyes aren't what they were in the 70s.

Eventually after checking everything at least twice, cleaned up the 'earths' and fitted star washers as suggested - Powered up - Success (For the moment)

As set was a wall mounted gift, think run it for a month at least before I try Ebay for the stand.

Great fun - Chris.

downunder:

Bravo, Chris. You're a Legend in your own lunchtime. You could start a nice little earner refurbishing these for other punters.

Who was your kit supplier?                            Bruce

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