Post The Led Backlights Your Fixing Here.

[hellride]

Re: Post The Led Backlights Your Fixing Here.

Working on fixing a Vizio e420i-a0. Found several bad LED's and have already replaced them. These LED strip's are attached with what looks like double sided tape, which was destroyed when removing the light strip's. My question is, how hot do these LED light strips get after they've been on for a few hour's? I have some Aluminum ducting tape that I thought I could use, though i'm not sure if the heat from the LED's would melt the adhesive on the tape. From what I've found, the Aluminum ducting tape has a max temp of 250°F.

[n2jtx]

Re: Post The Led Backlights Your Fixing Here.

I have a 46" Samsung UN46EH5300 that I found being thrown out two weeks ago while bike riding. The assembly date on the inside label says October 29, 2013 making it 3 1/2 years old. Opened it up and confirmed it is a bad LED string. As it is my first LED TV, I am trying to figure out how to get the back panel off in order to access the LED's. I have the service manual but it does not cover that level of tear down. Overall it is a very nice TV with no scratches. If I do manage to open it, I was planning to fashion an LED tester from a 18650 lithium battery and series resistor. I see used strips are available and figured I would install a used strip and then look to fixing the bad strip to keep as a spare.

[llonen]

Re: Post The Led Backlights Your Fixing Here.

I get around 5 or 6 at the moment coming through the workshop a week, over the last couple of months mostly LG.

[handsworth]

Re: Post The Led Backlights Your Fixing Here.

I love LG, especially the LN series. I've done about 25-30 now. Takes about 45 minutes. Looks like the LF and LB series will running into that problem too shortly. I've already sold replacement strips for these "new" Tv's

[ReeceyBurger123]

Re: Post The Led Backlights Your Fixing Here.

Good work

[sleeper123]

Re: Post The Led Backlights Your Fixing Here.

Wouldn't let me attach both pictures.

[sleeper123]

Re: Post The Led Backlights Your Fixing Here.

Just got done replacing 2 LEDs in a vizio e470i-a0. My first tv repair.

[comptek]

Re: Post The Led Backlights Your Fixing Here.

They make DUAL-LED in one package in many form factors with LEDs in series (6Vf rating due to two white LEDs is series), they also make DUAL-LED connected in parallel, Vf 3V.
See example PDF.

thanks Budm very interesting

[comptek]

Re: Post The Led Backlights Your Fixing Here.

Thanks for the youtube link.

youre welcome i have watched all of his vids the one about a jewel thief is good simple to make too

[vinceroger69]

Re: Post The Led Backlights Your Fixing Here.

They make DUAL-LED in one package in many form factors with LEDs in series (6Vf rating due to two white LEDs is series), they also make DUAL-LED connected in parallel, Vf 3V.
See example PDF.

Thanks budm.

[budm]

Re: Post The Led Backlights Your Fixing Here.

They make DUAL-LED in one package in many form factors with LEDs in series (6Vf rating due to two white LEDs is series), they also make DUAL-LED connected in parallel, Vf 3V.
See example PDF.

[vinceroger69]

Re: Post The Led Backlights Your Fixing Here.

Vinceroger69
when you look at the mains or high power COB LED (chip on board) there are loads of them if youre into stuff like that lookup BIGCLIVE on youtube he does alot of teardown stuff >>>>
https://www.youtube.com/watch?v=mZZbj-DNk7M

Thanks for the youtube link.

[comptek]

Re: Post The Led Backlights Your Fixing Here.

Thanks that makes sence too me now

Vinceroger69
when you look at the mains or high power COB LED (chip on board) there are loads of them if youre into stuff like that lookup BIGCLIVE on youtube he does alot of teardown stuff >>>>
https://www.youtube.com/watch?v=mZZbj-DNk7M

[vinceroger69]

Re: Post The Led Backlights Your Fixing Here.

on the 2 leds i checked that half work one lights up on left side and the other led lights up on the right side and you can see its half of the led, yes as it seems there is 2 led chips in each led assuming this is how they get the 6v in one package ?

Thanks that makes sence too me now

[flocko]

Re: Post The Led Backlights Your Fixing Here.

A lot of edge lite strips also have the two LEDs in one case,and also run at 5.5-6.00v but have an oblong case. and can be hard check as you need to just have a large enough voltage to turn them on without it blinding you

[comptek]

Re: Post The Led Backlights Your Fixing Here.

dual chip? never heard of that in the diagram there two diodes in each of the leds that you have ordered so is there two leds in one sorry for questions as never heard of dual chip leds.

on the 2 leds i checked that half work one lights up on left side and the other led lights up on the right side and you can see its half of the led, yes as it seems there is 2 led chips in each led assuming this is how they get the 6v in one package ?

[vinceroger69]

Re: Post The Led Backlights Your Fixing Here.

dual chip? never heard of that in the diagram there two diodes in each of the leds that you have ordered so is there two leds in one sorry for questions as never heard of dual chip leds.

[comptek]

Re: Post The Led Backlights Your Fixing Here.

At that price they are cheaper than led strips but harder too change i guess, but hey its worth just trying a couple and powering the set up and see what the colour/brightness match is like.

hi Vince i have ordered 50 theres only 2 out of the 18 leds that actualy half work theyre dual chip led's so i dont think matching will help much im aiming to replace all

[vinceroger69]

Re: Post The Led Backlights Your Fixing Here.

At that price they are cheaper than led strips but harder too change i guess, but hey its worth just trying a couple and powering the set up and see what the colour/brightness match is like.

[comptek]

Re: Post The Led Backlights Your Fixing Here.

have you measured the led size on your strip? aliexpress have so many too choose from.

yes it looks like 3mm x 3mm