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Plasma TV Power Supply Interchangeability

NandM

New Member
First off, let me say that my knowledge of electronics is just enough to be dangerous, :woot:. So, I am hoping somebody here can give me an answer to this issue:

I have a Panasonic TC-P50ST50 50 inch plasma TV, awesome TV, still worth repairing. Anyway, it literally started smoking one day, then, no more picture. There was an obvious burnt chip (ceramic disk cap) on the power supply board (TXN/P2STUEP). I acquired a known working replacement board that looks identical except for the part number, it has all the same chips and connectors, is the same size and looks identical in every way. Only difference is the part number corresponds to the next size screen (55inch) in the same Viera TV model line-up.

My question is, should I install this replacement board being that all the circuitry looks identical and it fits perfectly??
 

narkeleptk

Active Member
I'm not a tv guy but if its just the power supply I think you'd be ok. I would assume the important stuff is in the main board (one with big mcu) and maybe y-z boards
 

Nigel Goodwin

Super Moderator
Most Helpful Member
Bear in mind you will almost certainly have to adjust the power rails (even if you used the correct board), the exact values required are usually printed on the PDP itself, and the procedure will be described in the service manual.

I would suggest you download the service manuals for both sets, and compare the voltages - the 55 might be higher voltage?.
 

NandM

New Member
Bear in mind you will almost certainly have to adjust the power rails (even if you used the correct board), the exact values required are usually printed on the PDP itself, and the procedure will be described in the service manual.

I would suggest you download the service manuals for both sets, and compare the voltages - the 55 might be higher voltage?.
Could you point out the power rails on this board? Not finding the service manual anywhere. Thanks.Pan PB.jpg
 

Nigel Goodwin

Super Moderator
Most Helpful Member
Could you point out the power rails on this board? Not finding the service manual anywhere. Thanks.
No idea, if you can't find the manuals for the two sets, then it's just guess work if it will be OK or not. The few Plasma's I've been involved with all mention how important setting the power supply to match the PDP is, which is why the voltages are printed on the PDP itself.

I presume the failed capacitor is one of the small blue ones?, this is a VERY common failure in all kinds of equipment, they don't seem very reliable. However, they normally go S/C, and crack and smoke, but don't usually cause much other damage - usually replacing the capacitor and perhaps a blown fuse, is all that's required. It might be easier, and safer, to repair the original board.
 

NandM

New Member
Yes, it was a tiny blue cap, we freaked out when smoke started coming from the tv! So I looked at some block diagrams for the matching 55 inch Viera and closest 50 inchers I could find and the voltages are the same everywhere throughout these models. I can't imagine my 50" Viera would be any different.

Thanks all for the responses.
 

unclejed613

Well-Known Member
Most Helpful Member
yeah, at a service center where i worked, they used to buy those blue caps in bulk.
 

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