Panasonic 50GT30 with 7 blinks.

[Moreno83]

I got this tv with the symptoms that it shut down with a few loud bangs on the back of the tv.
Got home and turned the tv on , 7 blinks. No surprise.

Removed the back cover and removed the buffer boards from the tv and turned the tv on. Again 7 blinks so bad SC board.
Tested the buffer boards for shorts but luckily they survived so i thought this will be a easy repair.

The same 6 IGBT's as usual got shorted and i replaced them all with RJP30H2A.
Used the SC50 jumper and turned the tv on and it stayed on! Installed the buffer boards and got a nice image on the screen and i turned it on/off/on/off for a few times to see if it would stay on yes or no.

I let it play for a good hour , no symptoms or buzzing etc! The next day i turned it on and it simply shut down with a loud bang on topside of the board.
Im not sure which part blew but i think it was 1 of the diode's just looking at the flash.

I removed all RFN20 , RJP30H2a , RF15 and the remaining 30F131 on topside of the board that i did not remove at first as they were not shorted.
Replaced all parts with new RFN20 , RF15 and RJP30H2A so there are no 30F131 on the board anymore.
Installed it with the SC50 jumper and again it stayed on.
Turned it off and turned it back on and BANG.

Under Q403 came a little flame and smoke and it shut down with 7 blinks again.

What's causing this? Am i using the wrong parts for this board? The soldering is ok and clean and it's not heat that blows up the parts. I checked if they got hot after first turning on the tv.

It looks like the RJP30H2A that im using can not handle the load/current and simply blows up. Powersupply gives 207 on start up and then goes up to 215V to SC board.

It's the TNPA5335. Not sure if its AB or BG as im not at home.

Hope someone can help me out because i really want to fix this tv and im tired of blowing up SC boards!

[tw2005]

Re: Panasonic 50GT30 with 7 blinks.

Well after all the dramas I've had with fakes, who would really know anymore what's going on. If they're real RJP30H2 then they exceed the specs of the 30F131 so I very much doubt it's the part number, maybe you have bad ones? Again how do we tell?

I don't quite understand why you'd replace the bits that had not failed.

Only other thing would be to replace the driver ICs and small driver transistors. Check all the gate resistors.

If you get hold of fgd4536 from a good supplier try those but I'd probably rather have the original parts in place that you pulled out just in case those parts you have are suspect.

IC502 and Q531 seem to be ones that have been suggested as a good idea to replace.

Can't really help you much more.

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Yes i know but after reading so much succes stories about just replacing the 6 igbt's i thought it would work. If you get 6 blinks then also replace the IC.

I'll wait for the parts to arrive and replace all of them including IC502 and Q531. I dont get it as it turns on for a little while.

Only thing i notice is that the legs of my RJP30H2A are longer then the 30F131.

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Ordered a repair kit for this board. Seller claims he uses original Panasonic parts and not cheap chinese.
I will use the other parts i ordered for the other sc boards.

[flocko]

Re: Panasonic 50GT30 with 7 blinks.

If you keep trying to shortcut repairs to these boards you will keep going round and round . I hope the repair kit comes with Q501/531, IC501/502/ + D421 as it seems you keep missing these out from your repairs, even though you have be told to replace them for every SN/SC repair.as TW says can`t help much more

[tw2005]

Re: Panasonic 50GT30 with 7 blinks.

Yes i know but after reading so much succes stories about just replacing the 6 igbt's i thought it would work. If you get 6 blinks then also replace the IC.

I'll wait for the parts to arrive and replace all of them including IC502 and Q531. I dont get it as it turns on for a little while.

Only thing i notice is that the legs of my RJP30H2A are longer then the 30F131.

They're the same package really so the leg should be the same?

Where are you getting those fairchilds from?

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Hi Flocko ,

I already tried replacing those ic's with the RJP30H2A but same loud pops. It's not that and im choosing the shortcut repair as i want every repair to last for a long time with every tv i repair. This is the first board without replacing the ic 503.


The problem i have is the IGBTs. My first SC board repair i used fake igbt's ( found that out later ).
Now i used RJP30H2A and tv worked but for a little while. The legs on the RJP30H2A are longer then the 30F131 so i probably have fake ones again.

Yes the repair kit has the ic / resistors etc.

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

I got the RJP30H2A from ebay/china. I'll take pictures of the IGBT's tonight when i get home.

They almost dont fit on the board. Thought that was normal but it might explain why they also fail.

[tw2005]

Re: Panasonic 50GT30 with 7 blinks.

I got the RJP30H2A from ebay/china.

They're RENESAS, the FGD4536 are Fairchild

[tw2005]

Re: Panasonic 50GT30 with 7 blinks.

Really, maybe some images are in order. they are SMD, yes? Can't imagine anything SMD that's bigger

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Ok , what is the difference and more important. What do i need to check when i order parts? I just search for RJP30H2A and buy them , i think more people will do that. Forgive my ignorance.....

[tw2005]

Re: Panasonic 50GT30 with 7 blinks.

Ok , what is the difference and more important. What do i need to check when i order parts? I just search for RJP30H2A and buy them , i think more people will do that. Forgive my ignorance.....

I don't know what you're asking here. I would normally suggest just getting them from UT but can't say that anymore.

Id also suggest feeedback rating and recent complaints, can't say that either because that did not work for me either for two sellers sending duds.

Can't trust the images either because they may not be of the item either and they grab whatever image they can sometimes you'll notice different sellers using the same image.

All I was interested in is if you are getting the FGD from a good source or from china.

I get mine through RS Components so I know they're legit.

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

I was wondering what the difference is betweem RENESAS and Fairchild as you said i use the renesas.

I'll wait for the repair kit to come in and replace the parts and see if that works.

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

I ordered these RJP30H2A

http://www.ebay.com/itm/10pcs-RJP30H...kAAOxy3NBSlz2B

So renesas is a brand , same as fairchild? Are these good that i ordered?

[flocko]

Re: Panasonic 50GT30 with 7 blinks.

They look fake to me, printing not right and has feedback for fake components. you would be looking at about £4.00 each for the real thing ?

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Thanks for the reply Flocko , much appreciated. So basically im working with fake igbt's.

Can someone tell me where i can order good parts? I already have the IC502 and Q531 and i normally change those parts with every repair i do on these boards. Resistors are all measuring ok.

I just have problems with the IGBT's. I don't care if i need to pay a little more but i got 8 boards which i need to repair ( for myself ).

Will upload pictures of the parts i have.

[flocko]

Re: Panasonic 50GT30 with 7 blinks.

TW and I are using the smaller fairchild FGD4536 in place of 30F131+ RJP30H2A these are in stock at Mouser + RS and are an upgrade in spec, you can also get CPH5524-TL-E from both of these. Fake components are all way going to be out there. best way to avoid them is only buy from the good guys

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Ok i already ordered those but also from Ebay so im wondering if they are the real deal! Damn , if i knew this before then it would have saved me so much money and boards. I was really doubting myself but the fake parts got me off track. Even after replacing all igbts , diodes and the ic's the boards kept popping. ( Even small fire!!!! ).

Anyways i found out how to spot the FAKE igbts and took some pictures. The key in this situation is ISOPROPANOL!

In all pictures i used the original 30F131 on the left and the fakes on the right. On 1 picture you can see both igbts with and after cleaning it with alcohol. As you can see the original igbt has the same logo and circle and the other ones are almost gone.

The original igbt has a small circle stamped into the igbt and has a big F close to the circle.
The fake igbt has a circle but its not stamped into the igbt and has a smaller F.

Also take a look at the package and see the differences in logos. All have the same numbers on the bottom.

The fake? RJP30H2A has MUCH longer legs then the original Panasonic 30F131 and also blow if i replace them for the 30F131.

Man , it feels like throwing money into the garbage bin and i just ordered 50 of those RJP30H2A because i thought that was the solution for the fake 30F131


Hope this helps for someone else!!

[Moreno83]

Re: Panasonic 50GT30 with 7 blinks.

Thanks for the suggestion Flocko , brings back hope for all my boards. What is the succes rate if i use FGD4536 from mouser? Are they as reliable as the original part from Panasonic/Toshiba? I can order 50 for 38 euro so thats really cheap if i can fix all these boards.

[flocko]

Re: Panasonic 50GT30 with 7 blinks.

Hope you have a big bin? they have been rubbed (sanded)down to remove the part number and logo, and it has also taken off the time and date stamp(small circle)to most of them. can you post a photo of the BD8693FVM you are using as looking on line there seems to be a lot of fakes of these as well.