Panasonic TC-P50VT20 10 Blink Code

[GermanPlumber]

Ok I have a Panasonic TC-P50VT20 TV that is exhibiting a 10 blink code error.

I have done some basic troubleshooting and hopefully someone could shed light on what is happening so I can replace/repair the correct board.

I have read the few documents on this issue related to 2010 models and it basically says, it's the A board, P board, SS board, or SC board.

I also read through this page https://www.badcaps.net/forum/showthread.php?t=46753 and they had similar problems.

What I have tested so far.

No visible arcs, marks, blown components, but the SC board side of the TV smelled a little off, like electrically burned smell.

Tested SC2 connector on SC board for short. Seems good. Removing SC2 connection and turning on gives 7 blinks, but I think that is normal.

Tried to do the A board isolation test by disconnecting P6 and P7 on P board, disconnected D5 ribbon from D and A board, and also installing a jumper on P34 connector from pin 1 to pin 3. My P7 cable has a
a jumper between pins 12 and 14, so I also tried it there as well. Did not get a white screen.

Tested "After Power SW ON,F_STB 15V outputs at P6’s pin 9 15V outputs at P6’s pin 1 before Shutdown?" I get 15V on Pin 9 but I get 0V at Pin 1 for that 15 second period.

Panasonic's documentation say bad P board, but I want to make sure I am not missing something.

Thanks for any help.

Edit: I have dealt with a few panasonics, and it seems to always be SC related, and that smell of burnt electrical had my brain thinking, so I did a another look around, and I think i may have found my culprit.




Do my symptoms look to be just a bad SC board and nothing more?

[GermanPlumber]

Re: Panasonic TC-P50VT20 10 Blink Code

Due to the damage on the SC board, I am going to get that repaired first, have the buffers tested for damage, and then will diagnose from there. The no white screen makes me think a bad power board or SC board.

[RJARRRPCGP]

Re: Panasonic TC-P50VT20 10 Blink Code

The no white screen makes me think a bad power board

The power board, at least according to some folks, should result in code #2, (SOS #2/ 2-blinks) but I dunno...

[GermanPlumber]

Re: Panasonic TC-P50VT20 10 Blink Code

Ok good to know. I'll report back with my findings after the SC board is fixed.

[GermanPlumber]

Re: Panasonic TC-P50VT20 10 Blink Code

SC board repaired and TV is back up and running. I did have someone verify the buffer boards were still good. Ribbons had to be reseated (TV power off and disconnected from wall when reseating) as they werent inserted perfectly. Hopefully this helps the next guy.

Obvious things I learned.

1.) Look for obvious burn marks and off smells.
2.)The 10 blink diagnostic code was helpful, but it pointed me to a bad main or power first and that wasn't accurate. If I didn't see the SC board damage, I wouldn't have guessed it.

Thanks again.

[RJARRRPCGP]

Re: Panasonic TC-P50VT20 10 Blink Code

SC is the Y-sustain, according to Tom66.