DG302 PDF

Hello Hermann, First may I say how much I enjoy your blog. Your writing is interesting and clever and I've learned a lot from reading it. Thank you for making it, you've helped me and many other people I am sure. Twice I've ordered the diodes, IGBT and the other parts in the repair kit on ebay and twice it has failed as soon as I turned on the power. I'm thinking it's bad parts they were from the same source but I'm wondering if there's something else I should be looking at? The buffers and power supply are fine.

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Hello Hermann, First may I say how much I enjoy your blog. Your writing is interesting and clever and I've learned a lot from reading it. Thank you for making it, you've helped me and many other people I am sure. Twice I've ordered the diodes, IGBT and the other parts in the repair kit on ebay and twice it has failed as soon as I turned on the power. I'm thinking it's bad parts they were from the same source but I'm wondering if there's something else I should be looking at?

The buffers and power supply are fine. Thanks for any input. Thank you Joseph! Provided you have thoroughly measured all the diodes and large transistors for shorts, there is no reason to fail another time if all replacement parts are legit. The chance that the kits are crap is very high. Have you compared the kit parts against the originals under a looking glass?

I bet they look different. I forgot one thing. You need to check the buffer chips as well. If they have a short, they may kill the scan circuits. But I have yet to see a Pana 30 series with a buffer failure. Thanks Hermann, I appreciate your answer. The pieces I received have almost faded writing on them so I'm skeptical that they are real. I'll try to source the parts you mention above in your updated post. I bought by accident a known good scan board for a TC-P55ST30, tempted to scavenge parts from it but will hold off while I look for real components.

I have one issue, I was using hot air to remove and replace parts and now I have a loose part, looks like a capacitor. Hunting for where it goes, I guess I wasn't paying close enough attention. Hi Hermann, i just read your Blog. And with some Luck i can make a tx-p50st33e Tv working again that a friend of mine gave me to mess around with :- It used to blink 7 times I changed these parts as well and now its blinking 6 times again I thing i need your advice :- But the Breadbox is running fine by the way :-D.

I really don't know. Remote diagnostics is difficult. I never had a 50 with 6 blinks. Rinse and repeat and use proper parts. The 6 blink I described in detail in my blog. For the 42 though, but the concept is the same. Thx for your reply :- Then i will try to check the parts on the powersupply board. The heatsinks got up to 40C in my garage 10C which seemed rather high, as everything else was running just warm. Today I received another SC from a smashed screen set.

I fitted identical heatsinks and put the board in the same TV. The heatsinks only get up to about 24C, so I conclude further that unfortunately these copy DGs are likely to fail. I had measured my scan boards as well. For a semiconductor this is no problem at all. I think your DG just cannot cope with the current in the long term. Given that they don't seem to be as efficient at current switching as the s, and cause an energy recovery issue when in the RJP positions, they are less than great.

One way or another I now have two SC boards and two '30' TV's running, so much appreciate your help which started my learning journey on these. Another vendor to avoid: GT30F from Kokey Electronics, via UTSource and advertised as Toshiba and engraved similarly to Toshiba with their logo are confirmed as fakes by Toshiba and as with all fakes, fail in use almost immediately. Thanks for sharing.

I am pretty sure that there is no genuine F available from China. I was surprised about my good DG after a number of bummers. Hi Hermann. Thanks for these informative blog posts! I ordered some DG from the seller you recommended and they look quite different from the originals - font and location of indentations as well as package shape.

Are you saying they are copies but seem to measure and work like the originals? Or have I received something different than you did? You can never be sure with the Chinese. The ones I got last year looked and measured exactly like the originals and the repaired TV still works.

Sometimes though, the batches may look different. My most important measurement was the breakthrough voltages between emitter and collector. I have this funky chinese device for that see my post about tools.

When those measurements were identical, I was confident to have an original. Hi Hermann, I used your guidelines on this website to repair a 50 inch VT It worked perfectly for about 10 minutes and ended with a big bang. I couldn't measure any shorts afterwards. Q unsoldered itself, so it must got extremely hot. What's the best way to start again? I probably have fake parts from Aliexpress, but I don't know which ones caused the problem. I'm working in the audio sector and never worked on plasma tvs so im not sure how critical which parts are.

I'm very thankful for any advise! I am pretty sure that the 30F were garbage. You mentioned that one of them got so hot that it unsoldered itself. The FGD can replace all others. Did you test them already? I tried HKinventory. Hi Mark. They are looking good. Proper industrial packaging, not just in a sloppy plastic bag like the copies used to be.

I did not have time to try them, yet. Hi Hermann , Thanks for your comment. I ordered them also and got a 42VT30 test machine to test these little components. Will let you know. Did you stop with this blog? I really liked reading the threads. Hi Mark, well, the TV repair hobby has stagnated.

There are no interesting objects out there anymore. Crashed screens and buggy mainboards, that is the majority these days. Furthermore, the prices for working, used TVs are practically the same as for defect ones. It is ridiculous. I might dig into specific cases like the Philips QFU just to explore.

I won't regularily fix TVs anymore, though. Hi Hermann , I still buy the plasma tv's defective in the Netherlands and Germany. I dont repair LED tv's , just not worth it because i cant give the guarentee they keep working.

I only repair plasma and they sell pretty good because in the Netherlands alot of people still want a plasma. If you can get them cheap it is still interesting. I just repair them for the money and interest ofcourse but. These are still current, but no mention of use for plasma sets in the datasheet. Repaired a 46GT30 with the parts , it turned on but after a few mins the image got purple. I turned it off before the parts exploded haha. Can't remember the detail, but believe this can be caused by line voltages out of spec, which can happen after board or component change.

Have you checked the three voltages on the YSUS board? Vscan, Vsus and Va, all have test points on the board. Oh dear, thanks for the feedback, Mark! Purple picture means that the charge voltage is too low.

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DG302 Panasonic Transistor Buy 2 Get 1

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