Panasonic Plasma TV TX-P50X50B - Shorted power supply

[tri-comp]

Re: Panasonic Plasma TV TX-P50X50B - Shorted power supply

OK, I see no-one's interested.
However, just in case someone ends up here from a Google-search or the like, I'll give some feedback on how this has ended.

Obviously replacing the original 7-pin FAN6755U with a new 8-pin ditto wasn't an option.
It seemed more reasonable trying out the NCP1271 chip even if I haven't found any docomentation as to this chip being a drop-in replacement for a FAN6755U.
Not really surprising as the pin-out is different from the 6755U EXCEPT on the Darfon schematic.
So, here goes nothing and I replaced the original chip labelled 6755U with a NCP1271B and switched-on.
Everything is absolutely fine and the TV works again.
Testing for bad-cap's, just in case showed nothing.
I assembled the set and called it a day

Thanks again for the Darfon PSU schematic.

[freakaftr8]

Re: Panasonic Plasma TV TX-P50X50B - Shorted power supply

Wow nice fix! Looks like it was the standby controller all along?

[tri-comp]

Re: Panasonic Plasma TV TX-P50X50B - Shorted power supply

Wow nice fix! Looks like it was the standby controller all along?

Yes, it certainly seems to be the only thing wrong.
The fault started out being periodic with typically a week or so between breakdowns.
Finally the fault matured and stayed permanent.
So, it wasn't such a big thing finding the defective switching-chip.
It was identifying what could be used as a replacement that proved difficult.