Panasonic TC-P50S2 Snowy Picture

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

There is probably a small lytic around the set-up ramp generator responsible for setting the ramp timing, or a ceramic cap. For a failure that would be my bet but locating it could be hard without a scope.

What is a "lytic"?

[tom66]

Re: Panasonic TC-P50S2 Snowy Picture

Slang for "electrolytic capacitor" - the tall things all over the board. They are frequent failures in consumer electronics, although it's rare to find a bad one in a Panasonic as they typically well overspec them.

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

Will operating this set as is cause additional problems?

[tom66]

Re: Panasonic TC-P50S2 Snowy Picture

That cannot be ruled out, possibly the set-up MOSFET could fail causing other problems, though it is likely to be repairable if you eventually source a new SC board.

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

there are 3 small capacitors in the area I heated and cooled to initiate the fault. would they be the suspect?

[tom66]

Re: Panasonic TC-P50S2 Snowy Picture

Can you highlight them and possibly include the "REFDES" of the capacitor. This is the text like e.g. C958 printed next to the capacitor on the board. The schematic can be checked to see if they might cause this problem.

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

this is the area that seemed to cause the fault.

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

I will have to take the back off again to get better pictures of the "REFDES" (wife was getting grouchy about the repair shop in her living room)

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

Sears Parts Direct will be sending me this board about $180.00. Will there be any adjustments to make or will changing the board be all that is required?

[tom66]

Re: Panasonic TC-P50S2 Snowy Picture

There should be no adjustments required if it is an exact replacement board.

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

they claim it is a direct fit. will let you know how everything works. Thanks again for all of your help

[tw2005]

Re: Panasonic TC-P50S2 Snowy Picture

was that an exchange or did you manage to keep the old board? probably get some bucks back selling the old one .

[tom66]

Re: Panasonic TC-P50S2 Snowy Picture

If you decide you want to get rid of the board maybe tw2005 or myself could take it on as an interesting repair, I would be curious as to what the actual fault is (though I'd need a P50S2 or similar to stick it in, so it's probably more suited for tw.)

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

I would not need the old board. You are more than welcome to it if you arrange shipping.

[f67bird]

Re: Panasonic TC-P50S2 Snowy Picture

Something you can try for free if you haven't already is to snug down all screws that mount the sc and ss boards. Some of the newer Panasonic plasmas have sc and ss board failures that start with loose mounting screws.

[Mikes]

Re: Panasonic TC-P50S2 Snowy Picture

Did this board change fix the problem?

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

I am still waiting for the board to arrive. I had to re-order from Panasonic, Sears parts direct made a mistake and did not have that part.

[rlhowelljr]

Re: Panasonic TC-P50S2 Snowy Picture

I got the board yesterday afternoon. It was very easy to install, and the picture is perfect.
Thank everyone so much for your help.
If anyone is interested in the old SC board please let me know.