Panasonic TX-P42G20E 4 blink

[malling]

Hi all. My hair is turning all gray. My only 4 years old pana TX-P42G20E switched off last friday giving a 2 blink error. Switched the set off for a while when i swtched on again the blink was now 4 pointing at the power board.
I have been troubleshooting for a while now.
Caps and fets seems to be ok.
One thing that puzzles me is, when i meter from Q505 to IC603 the connection comes in on leg 1. It should, how ever, come in on leg 15.
Any tips?

[malling]

Re: Panasonic TX-P42G20E 4 blink

Yes! Read another thread. The Sc board is shorted, or close to. more fets and ic 521 shorted. Now i just need to find spares.

[tw2005]

Re: Panasonic TX-P42G20E 4 blink

RJp63F3a, DG402RP x 2, 30F125 x 2, dg502LW x 2, 45G128 x 1, RFN25TM4SW , M81737FP, TC7SH14F, MMBTA92, 2PD601ART, 2sk3018 or 2n7002, RF071L4s or RF101L4s, TA78L05, cph5524

[malling]

Re: Panasonic TX-P42G20E 4 blink

That exact thread tw2005. Found new board here: http://www.cradeal.co.uk/index.php?m...oducts_id=1419
Should i bother to rebuild the old one?

[tw2005]

Re: Panasonic TX-P42G20E 4 blink

That exact thread tw2005. Found new board here: http://www.cradeal.co.uk/index.php?m...oducts_id=1419
Should i bother to rebuild the old one?

well, depends on your ability I guess. $125 for a board or $20 in parts.

I'm biased because I can fix these.

Buy one and try to fix the old one. Fix it and sell it or keep as a spare or at worst sell the dead board but definitely don't throw the old board out as it is good for a core repair. these are getting scarce like many others.
It would be interesting to see what you find dead

[malling]

Re: Panasonic TX-P42G20E 4 blink

Ordered a new board from that cradeal thing. Interesting if I will recieve anything.
I have tried to follow your guide to trouble shoot the components. I am not wery sure but it seems that a lot is dead.
I could never dream about throwing the old board away. Think I'll try to repair it.
Any hints where to find parts?

[malling]

Re: Panasonic TX-P42G20E 4 blink

Recieved an AG Board today, it should have been an AH board. Does it matter?

[tw2005]

Re: Panasonic TX-P42G20E 4 blink

Did you order an AH? paypal claim? AG will work but won't be properly matched to the panel. Without looking at the parts lists I'd say visually the 2 inductor coils may be the only difference between the 2.

[tw2005]

Re: Panasonic TX-P42G20E 4 blink

Have you checked it first for faults i.e shorted transistors Q661 is one that is usually always bad.

[malling]

Re: Panasonic TX-P42G20E 4 blink

1. I di order AH, Invoice and sitestates AH
2. Have clamed. But it is some 14 days in the mail.
3. There is some bigger caps and a few more fets on the AG board.
4. The AG bord seems to be okay. Tested without bufferboard connected and sc shorted. no error code.

You mean Q661 on the new board?

Tried to locate the parts you mentioned earlier, found 6 of 13. they are not all transistors?

[tw2005]

Re: Panasonic TX-P42G20E 4 blink

I can't tell about the caps in the pictures, coils i can, transistors looks same qty and locations in the pics on SJ.

if no error with SC50 jumped and buffers removed, that is a pass

you're right as far as parts that blow it's a mixture of IGBTs, fets, driver ics, diodes etc

[malling]

Re: Panasonic TX-P42G20E 4 blink

Cradeals reply:

"they are compatiable each other,

we sent is TNPA5081AP work for same tv same connectors
our technician tested before ship
Just install it "





At 2015-05-06 02:29:11, I wrote:

Hi Cradeal

I have purchased a Panasonic sc board, the billing informations and the informations on the site where i ordered, stated that it is an AH board, but the actual board that i recieved is an AG board.
I am afraid the board is not for my tv-set but for a bigger model.
I would like to recieve the item i have ordered and paid for.

[tw2005]

Re: Panasonic TX-P42G20E 4 blink

Cradeals reply:

"they are compatiable each other,

we sent is TNPA5081AP work for same tv same connectors
our technician tested before ship
Just install it "





At 2015-05-06 02:29:11, I wrote:

Hi Cradeal

I have purchased a Panasonic sc board, the billing informations and the informations on the site where i ordered, stated that it is an AH board, but the actual board that i recieved is an AG board.
I am afraid the board is not for my tv-set but for a bigger model.
I would like to recieve the item i have ordered and paid for.

Well we all know that neither panasonic or a panasonic tech would do this and if they all interchanged then why would one produce different versions.

I'd love to see them supply a 42" for the 54" and see how that goes with half the transistors missing.

I think their english and "Just install it" sums it up.

For sure this will fire up and produce a picture, probably won't see anything vastly different. I just don't know what the long term result will be, TOM may or ask panasonic butI'd expect they'd say not suitable. Or , swap the parts that are different but defeats the purpose of paying good money for something half right.

Up to you what you do but they can't argue , item not supplied as ordered.

[malling]

Re: Panasonic TX-P42G20E 4 blink

Just my point.
I've restated my claim. Now let's see what their reply is.
May have to make a Paypal claim.