Panny 50PZ80u

[niqht]

classic problem child that is now giving a code 4.

Here is the story ...

Was my parents, been sitting in the garage for 2 years. Once I finally got to it, it had the standard code 10 so ordered a cap/IC kit. As a quick check until it arrived I grabbed some regular long stem electrolytic caps from Frys and stuck 'em on the 201 & 301. It started right up. But to test, I left it on over night. In the morning it was off with a code 4. Nearly everything I find on these TV's is the 2/10, almost nothing on a 4 other than it is also P related. My question then, is the standard cap/IC repair related to a 4? If not what other direction do I go with this, or is it even worth it at this point?

[R_J]

Re: Panny 50PZ80u

This is the code from the manual... 4 Blinks = Power SOS P-board

[tom66]

Re: Panny 50PZ80u

4 blinks is likely due to a shorted sustain board, SC or SS. The sustains are rare failures, from memory they are pretty cheap. It may have failed due to inadequate cooling - the case being off means the fan airflow won't work properly.

[niqht]

Re: Panny 50PZ80u

Hmmm... so i potentially broke it more than it was. I have not powered it since then, so I guess I'll just have to get my IC kit on when i get a chance and see if it does it again.

[truep]

Re: Panny 50PZ80u

Replace those Fry' s caps too. Order Panasonic FM or FC caps from digikey. The caps you have from frys don't have the ripple current or esr needed in a switching power supply.

[AWTVs]

Re: Panny 50PZ80u

Hey Panny - did you ever figure out the 4 blink code? I have the same model and replaced the 201 & 301. It worked perfectly for about a month now but it just went out and is blinking 4 times.

[tom66]

Re: Panny 50PZ80u

Try starting the set with the SC and SS boards unplugged. If the TV goes to 6, 7 or 8 blinks then the fault is with the SC or SS board.

[AWTVs]

Re: Panny 50PZ80u

I sent the power board off for repair. They found a bad mosfet and fuse. After I received back and reinstalled it powered up fine. After 30min of testing, it simply powered off and began flashing the 4 code. The following day I plugged it in and it once again came on and started working as expected. In my novice opinion, it appears that it may be a heat issue with the power supply. Any suggestions would be appreciated.