Panasonic TFTV5025FL failed LED string

[dkneyle]

I'm on the verge of scrapping this set but thought I'd ask the question first. How difficult is it to obtain replacement LED strings for panels? This set has five pairs of wires emerging from the panel and plugging into the power supply board. Looking at the board it appears they are wired in series. There is ~120VDC applied across all the strings. I'm assuming I have one failed LED somewhere and all have been lost.
Is it worth the effort to pull down the panel? (I notice it's some nondescript Chinese panel- Palsonic are very cheap TVs.)

[ReeceyBurger123]

Re: Panasonic TFTV5025FL failed LED string

You can separately test each Led its best to repair the original strings as replacing them all is very expensive and little profit to be made. Will link a video.

[ReeceyBurger123]

Re: Panasonic TFTV5025FL failed LED string

Check this out, its a good method to check each led. Also what return (negative) voltage do you get on the strips ?

https://m.youtube.com/watch?v=eEJoPCa7Kt0

[Ltank]

Re: Panasonic TFTV5025FL failed LED string

I don't know anyone that sells replacement LED strips. Screensare troublesome to dissassemble and reassemble.I certainly would not notdofora customer but might try it if it was my own set. Trrying to get the correct LED isa problem also.Itisalso difficult to remove old LEDs with out damaging the strip's very fine traces. The Leds are held in place with a heat sink adheasive. Good Luck

[ReeceyBurger123]

Re: Panasonic TFTV5025FL failed LED string

Its not Ltank its actually easy after you have done a few. Just pop the optic and reflector off, use hot air and slide fault led off then place new led on top apply hot air until new led takes solder. Replace reflector and optic and your done.

Watch this:

https://m.youtube.com/watch?v=Bf5T2wwtydY

[dkneyle]

Re: Panasonic TFTV5025FL failed LED string

Thanks guys. It's a dumpster set of my own. I might strip it down as a learning experience in the very least.

[dkneyle]

Re: Panasonic TFTV5025FL failed LED string

I looked at those videos. Quite helpful for anyone that does want to have a go at a repair. I made the hard decision to scrap the set because I didn't have any replacement LEDs. But I did want to find out the cause of the failure and also scavenge some spare LEDs for the future. I wasn't too careful in dismantling the LCD panel and managed to break it in the process anyway. Found one LED in the string that was U/S. Seems like a major engineering design fault to wire about 60 LEDs in series and if one fails the TV is a write off. Anyway, I've got spare LED strips and single LEDS for the future if I get another one that needs a LED replaced. I'll be more careful with the panel in that case!

[johnboy1313]

Re: Panasonic TFTV5025FL failed LED string

Post a picture of the string, the connector(s) on each end, and any part number identification that you can find.

[dkneyle]

Re: Panasonic TFTV5025FL failed LED string

Part number appears to be LXD017. There is a left and right interconnecting string. They are wired in series. I will be advertising on Flea-bay if anyone is looking for spares.