Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

You tested it correctly, and it is blown.

Although your new board probably wasn't damaged by the LED driver failing (if it has), your old board might have been. Can you get a picture of the LED driver? There is no schematic for it, so we'll have to work off pictures alone.

Ok here is pictures of the LED driver. Also that same part is also blown on the payless PSU.

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

C1, the yellow capacitor 470uF/35V. Test on continuity range. What do you see? It should briefly show a low number and beep, but go to OL after a few seconds.

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

C1, the yellow capacitor 470uF/35V. Continuity range. What do you see? It should briefly show a low number and beep, but go to OL after a few seconds.

Test it in circuit?

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Yes.

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Test it in circuit?

It starts at 200 Ohms with a short beep then goes up to 512 Ohms and just stays at 512 ohms

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

The payless LED driver board acts as you say it should. But my original LED driver noes not

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Not shorted, then. You can try jumpering the fuse on the P board. This should be OK for a quick test as the LED driver is fused. If the fuse on the LED driver blows, or the P board shuts down (power cycling, etc.), you know that the LED driver has an issue. Otherwise the backlight should come on and the TV should work.

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Saw your other post... perhaps try jumpering fuse on old P board with new LED driver?

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Saw your other post... perhaps try jumpering fuse on old P board with new LED driver?

Ok which fuse?

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

I'm confused I don't know why both LED driver boards on the yellow cap gives me different results.

Can it be because one is charged and the other one is not?

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

It may be faulty. It could have caused the fuse on the original power board to fail (fuse blown.)

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Fuse is PA7401.

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Saw your other post... perhaps try jumpering fuse on old P board with new LED driver?

Did this and the set works. So what does that mean?

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Great! Now replace the original fuse on the P board for long term reliability and safety. This should work:
http://www.digikey.com/product-detai...2-1-ND/1473444

Return your new P board as defective and keep the old failed LED driver as a spare for extracting parts maybe.

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Great! Now replace the original fuse on the P board for long term reliability and safety. This should work:
http://www.digikey.com/product-detai...2-1-ND/1473444

Can I pull that fuse from another board? Also what does this all mean? what was faulty from the start? was it the LED driver board? or the PS? or both at the same time?

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Looks like your LED driver failed. The fuse on it is rated 6.3A. It shorted the power supply, causing it to output a large current. The power board fuse failed first, probably just random which one fails.

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Looks like your LED driver failed. The fuse on it is rated 6.3A. It shorted the power supply, causing it to output a large current. The power board fuse failed first, probably just random which one fails.

Ok, so my original LED driver board is faulty?

So you think that the original LED driver failed causing the power supply to fail as well correct?

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Yes, I think that's what happened. Either that or the fuse failed randomly, but that doesn't explain the differing measurements between LED drivers.

[sfernandes]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

Yes, I think that's what happened. Either that or the fuse failed randomly, but that doesn't explain the differing measurements between LED drivers.

Ok, it would be nice if I can get that fuse from another board so I wont have to wait. When looking for it on another board what do I look for is it the markings that it has on it that have to match?

[tom66]

Re: Panasonic TC-L47E5 LED TV blinking red power light PLEASE HELP

You can use the TV as is, but you should replace the fuse ASAP. Markings would be similar to the white fuse on the LED driver marked 6.3A.