TNPA5335 7 blinks continues after "fix"

[Logan_c]

I received a repair kit for the TNPA5335BA board and while I don't have the skills I have a buddy who does. The kit (https://www.shopjimmy.com/panasonic-...tc-p55gt30.htm) I ordered from shopjimmy and all the parts were installed. However Q621-623 are the original 30F131 on the SC.

After the repair I am still getting 7 blinks.

I have pulled the 3 boards out and when I ohm out the replacement FGB20N60SFD on Q401-Q403 (measuring the outer legs) I get about 47 ohms. I also get the same on Q421-Q423, also the Fairchild replacements.

This is what I get on:
Q621--- 25.8 ohms (original 30F131)
Q622 --- 6.6 ohms (original 30F131)
Q623 --- 25.6 ohms (original 30F131)

Does this seem correct, or suspect?

I did have a couple bad IC's on the SU board, which I have run a continuity test across SU1 and SU2 since two IC's were replaced and I no longer get shorts like I had before.

Since I am still getting SOS7 I suspect the SC board. Maybe it is simply Q621-Q623? Do the above measurements seem to indicate Q621-Q623 are bad?

Also, I get 40 ohms on Q661, if that means anything...

[tvtimmy]

Re: TNPA5335 7 blinks continues after "fix"

Check everything for shorts and before you install it, re-flow all the screw holes, top and bottom. Check the small driver Ic's as well( the 3 legged ones).

[tvtimmy]

Re: TNPA5335 7 blinks continues after "fix"

I just remembered that I fixed two of these. One for a 55" and one for a 50".
The one for the 50" was no problem, but the 55" had a bad q600 and a bad part marked DAF 3....something? I should have taken notes on my repairs. On the 55" i also had a bad upper buffer board. Check other posts on how to check SU and SU boards. Hope this helps.

[crt man]

Re: TNPA5335 7 blinks continues after "fix"

Do a search, there is lots of threads on repair of this board.
Q621-3 seem short to me

Alan