Panasonic TX-P50UT30B 6 blink error

[marekk]

I'm struggling to fix Panasonic plasma TX-P50UT30B.
TV doesn;' turn on and LED blinks 6 times.
Faulty is SC board like usually it this case it's TNPA5351 AF
I have changed already Q622, Q623, Q600 and Q661 which all were shorted.
After that TV still doesn't turn on showing 6 blinks, no shorts fortunately after powering up.
Later I swapped from my other death boards PC685, PC581 and IC921 but it didn't change situation unfortunately. Both buffers I swapped from my TX-P50ST30B.
I have found no other shorts.

I will appreciate any help to solve this problem.

[Alastair E]

Re: Panasonic TX-P50UT30B 6 blink error

If those parts came from 'death-boards' as you say, can you be sure they are good?

[marekk]

Re: Panasonic TX-P50UT30B 6 blink error

only those ( PC685, PC581 and IC921) came from faulty SN board like TNPA5330 or TNPA5457 with faulty buffer chips which I have used as source of parts.

[Alastair E]

Re: Panasonic TX-P50UT30B 6 blink error

http://www.toms-service-manuals.com/...h=Submit+Query

[tw2005]

Re: Panasonic TX-P50UT30B 6 blink error

I'm struggling to fix Panasonic plasma TX-P50UT30B.
TV doesn;' turn on and LED blinks 6 times.
Faulty is SC board like usually it this case it's TNPA5351 AF
I have changed already Q622, Q623, Q600 and Q661 which all were shorted.
After that TV still doesn't turn on showing 6 blinks, no shorts fortunately after powering up.
Later I swapped from my other death boards PC685, PC581 and IC921 but it didn't change situation unfortunately. Both buffers I swapped from my TX-P50ST30B.
I have found no other shorts.

I will appreciate any help to solve this problem.

maybe check all the drive ccts.

[marekk]

Re: Panasonic TX-P50UT30B 6 blink error

Thank you very much for those slides, I haven't seen them before.

[tw2005]

Re: Panasonic TX-P50UT30B 6 blink error

Thank you very much for those slides, I haven't seen them before.

Neither have I, wish i had them when i struggled with the TNPA5335 which I'm still not 100% sure which bit I did fixed it.

Really interested to see how you go in diode checks on those 8 pin driver buffers.

I always think when bits stop blowing up you're close.

It seems to me if you get 621, 622, 623, 661 etc are bown it's a dificult repair.

Also I don't see any 6 blink repair kits for the 5351 or 5335 so it would be good to see what it is we're missing.

[BigPete]

Re: Panasonic TX-P50UT30B 6 blink error

Just fixed this same model TV.
I thought I would post up what I found for other people.
TV had no blink code at all. Just a solid green light and no panel discharge.
The 30F131 transistrors on the SC board were shorted only.
Replaced them, now I get a 6 B blink error code.
Replaced both DG302 transistors and a hole heap of the small 5 and 8 pin ICs and transistors. Everything that came up in a search, still no go.
Turned out to be the green LED D583.

[budwich]

Re: Panasonic TX-P50UT30B 6 blink error

:-).... that's rather interesting. Did the LED actually light and then go out or didn't even light?

[BigPete]

Re: Panasonic TX-P50UT30B 6 blink error

I never noticed it lighting during the multiple tests.
I only found it because I was testing the whole SOS6 circuit in diode test mode.
Looking back Tom did mention in one of the posts to see if it was lighting briefly, but I was focused on all the common faults that I didn't even think to check.