Panasonic TC-P50G10 5 blinks

[kevinm34232]

5 blink code says missing/shorted P5V or shorted Vda line. Cannot find any evidence of a short. I get 5V momentarily on plugging into AC, before gets shut down by SOS. Anything else to check??

[Moreno83]

Re: Panasonic TC-P50G10 5 blinks

Any history on the set?

Remove the SC20 connector and powerconnector on the sc board. Meter in diode/beep mode and put the propes on the SC board connector , do you get a continuously beep?

Do the same on SS board.

[kevinm34232]

Re: Panasonic TC-P50G10 5 blinks

I removed SC20 and SC2 is the connector to the power board, and yes there is a short between the 2 pins on SC2 on the SC board. I assumed 5 blinks was something on the main board and this short would be a 7 blink problem.

So I have a short somewhere on the SC or SD/SU?

Isolated SD/SU boards, turns to 3 blinks.

[kevinm34232]

Re: Panasonic TC-P50G10 5 blinks

Also did the resistance test on SC/SD/SU, SD and SU tested OK, SC tested as follows:

"Using a digital meter measure the resistance between the VF-ground screw (Floating ground) and pin 3 of connector SC42.
Also measure the resistance between the VF-ground screw (Floating ground) and pin 5 of connector SC42 on the SC board.
The normal resistance for pin 3 is approximately 2.9Kilo-ohms and approx. 5.7Kilo-ohms for pin 5."

pin3=2.9k
pin5=5.3k

Is that 5.3k an issue from the normal 5.7k?

NM. Just checked SC board and just about every through hole transistor and diode shorted. I was thrown off by the 3 and 5 SOS codes.

Is this board worth repairing?

[Moreno83]

Re: Panasonic TC-P50G10 5 blinks

Most of these models all have shorted sc boards.
It is worth to repair the board but dont buy a repair set , to much money. It is best to figure out which parts need to be replaced and usually it is not just a few fets.

Tv gives a good picture!

[Biruslapio]

Re: Panasonic TC-P50G10 5 blinks

I have a P50G11B,it is almost the same except for the A board layout is different,when i got it had so many problems.
Had to buy the SC,SS and SD boards,my SC had ALL of the transistors shorted and almost all of their drivers too,burned resistors,only 4 diodes were still working,a repair was possible but the FETs were more expensive than a used SC working where i live,and the drivers that failed i couldn't identify them,let alone find a replacement.
By reading on how your SC failed,maybe it is not worth it,sometimes the IGBTs will seem shorted,but it is only their drivers,which are some small SMD 5 pin near the transistor it controls.
Should be giving 7 blinks for a scan circuit fault,but maybe it is also shorting the voltage supplied from A board flat cable to SC.
I've repaired mine,excelent picture,no problems now except for the really bad black level.