Panasonic TC-50PU54 8 blinks picture flashes then dead

[nobbnobb1]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Sorry to bump this thread, I'm having the infamous 8 blink error however, that happens after the TV powers on for 1- 2 minutes. Since the TV DOEs work fine for a few minutes, is it still of value buying the repair kit?

Or are there other areas to check? I've read through the entirety of this and similar threads and there doesn't seem to be any conclusion.

[budwich]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

If the connector is short, that means it'll show OL on the multimeter, correct? In this case, the power supply is not short. I've also checked all the "Q" 3 legged on the ss board and it's fine. I've also replace the sc board with a brand new board and it's still showing 6 blinks.

IF I understand this statement, it actually likely means they are all shorted... :-( as your "logic" is kind of "backwards".
The measurement that you made probably was "0" (zero) which is a "dead short".

[budwich]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

If the connector is short, that means it'll show OL on the multimeter, correct? In this case, the power supply is not short. I've also checked all the "Q" 3 legged on the ss board and it's fine. I've also replace the sc board with a brand new board and it's still showing 6 blinks.

NO.... "OL" means "OverLoad" which means the meter can't measure the connection... if it is on resistance, it means the resistance between the two probes is beyond the scale of the meter... likely meaning its "open circuit" and NOT "shorted".

with the "3 legged Qs", placing the meter on "resistance" (no power on the circuit), black probe on the large tab of the back to the Q and red on each one of the legs, they should NOT read "0" except for the middle leg which is tied to the large back tab. If any of the other legs read "0", that component IS SHORTED.

[budwich]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

I assumed "continuity" means it's not short. To measure resistance, I need to plug in the power, correct?

NO... all resistance measurements are done without powering as the meter provides its own power to determine the measurement.

As for "continuity means its not short"... ???? I think you need to go back and learn a little more about electricity / electrical terms.

A "short" is a "continuity" which shows "0 ohms" between the two probes.

further, a electrical path that has "resistance"... ie/ 10, 100 whatever ohms still has "continuity"... meaning there is a "real" connection / path between the two probe point. The term "continuity" just means there is an electrical path between the two probes... the term needs further qualification in terms of resistance to provide any usefulness.... kind of like measuring one's temperature and then saying you have a "temperature". Yes in general that would true, otherwise you may be dead but the useful qualifier would be that you have temperature of 100F, then there is meaning to the "test".

so, some what side tracked but you measured "continutity" but what was the resistance of the "continuity"... 0, 1, 2, 100, ???? depending on what you read, will tell us what perhaps is happening.... assuming of course, we also know which two points you were taking the reading for.

I suspect that based on the "exchange" that you have provided, that perhaps you need to really state exactly what you did when you measure things if you want to get to a good ending as I for one am not very confident that the description and technique is OK. could be wrong but that's my read. It would be shameful if you can't get this thing readily fixed.

[tvtimmy]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Check everything on the SC/SN board for a short.

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

I know he said that he checked it for "continuity"... but what does that mean???? What was the resistance reading of the resistor in question??? I agree that resistor looks blown. Further, on my tcp50s30 "attempt to repair" resulted in a blown resistor as the "subtending FET's" were shorted. I suspect that resistor is blown and the resulting measurement (in circuit) isn't measuring the resistor but rather the rest / remaining circuit.

You need to check this area again.

I assumed "continuity" means it's not short. To measure resistance, I need to plug in the power, correct?

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Check the connector that goes to the power supply for short.Check all the "Q" 3 legged. Transistors for short.

If the connector is short, that means it'll show OL on the multimeter, correct? In this case, the power supply is not short. I've also checked all the "Q" 3 legged on the ss board and it's fine. I've also replace the sc board with a brand new board and it's still showing 6 blinks.

[budwich]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Gotta say, although tvtimmy said he never found the resistor bad, that one in the photo looks to have a hole in the top. You sure it's testing ok?

I know he said that he checked it for "continuity"... but what does that mean???? What was the resistance reading of the resistor in question??? I agree that resistor looks blown. Further, on my tcp50s30 "attempt to repair" resulted in a blown resistor as the "subtending FET's" were shorted. I suspect that resistor is blown and the resulting measurement (in circuit) isn't measuring the resistor but rather the rest / remaining circuit.

You need to check this area again.

[tvtimmy]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Check the connector that goes to the power supply for short.Check all the "Q" 3 legged. Transistors for short.

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Base on this youtube video, it sounds like I need to replace my sc board. I've unplug the c20 ribbons on my sc board and c20 on the bottom and tv power stays own but black screen. Does this sounds possible?

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Okay, I put everything back and it's showing 6 blinks error now. What's else do I have to look for this time?

[tn245]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Gotta say, although tvtimmy said he never found the resistor bad, that one in the photo looks to have a hole in the top. You sure it's testing ok?

[tvtimmy]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

A beep longer than 3 seconds means short , if your meter has that function.

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Thank you for the help, much appreciated.

How do I go about testing if ss1 is short or not? Do I just test for continuity of ss1?

[tvtimmy]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Lead-free solder is the anti-christ of solder. You can use it if you want, but I never will.
That shit is the reason for me fixing 200+ plasma tvs. I make good money doing it, but as for using it myself on a repair, hell no!

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

then re- tin it with new leaded solder.

Can I use lead-free solder? Or does it has to be leaded solder? How do I test the ss1?

Thanks for the help.

[tvtimmy]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Ok, somehow you added the number 16 in front of all the components. D16041 is d041. If you have no short at ss11, the white power connector, or at any other 3 legged transistor, it may be the ic driver. Scrape the black shit off with a razor blade and then re- tin it with new leaded solder.

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

Here's the D16041, R16051, and Q16051 that I've tested for continuity and it seems to have no issues.



And here's the mounting holes that the grounding pads are stripped. How do I replace this pads on the trace and around the mounting holes?

[tvtimmy]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

There is no right click on a cell phone. Read up on how to attach a picture on the home menu.

[2myCharlie]

Re: Panasonic TC-50PU54 8 blinks picture flashes then dead

If you right click on the ? icon and select "Open Link in New Tab", the picture should load. For some reason, sharing image files from Onedrive and Google drive does not display it in this forum.