LG Nano91 TV Backlights

[Diah]

Re: LG Nano91 TV Backlights

need to remove / clean the old solder to see howmany beds.. now they look shorted together

[Storyteller12]

Re: LG Nano91 TV Backlights

It's still hard to tell. But here is the strip where it was removed from

[Diah]

Re: LG Nano91 TV Backlights

yours last photo they look 8 leds... and you do have 8 channel.. lol

the best way look on the strips where you removed the led..

[Storyteller12]

Re: LG Nano91 TV Backlights

I tried my best to desolder and take a pic of it. It's so small and I don't have a scope so it's hard to work on.

The last pic I believe is the best and I think your right about 4leds.

Now we have some better info on them. Trying to source them is another thing

[Diah]

Re: LG Nano91 TV Backlights

from the photo i can see there are 4 LEDs section. 4x6 =24V or coulf be they are just 3 x6= 18V. on the label there are 18UM 2W
you need to see the back side exactly if they are separated ( no conection at bed )to know how many they are, same as Lotas said early they are group of many LEDs

[Storyteller12]

Re: LG Nano91 TV Backlights

Here you go

[Diah]

Re: LG Nano91 TV Backlights

Diah,
Measured the led in beep mode and diode mode and got OL on both. No shorts but no reading either. As for size I cannot measure but I took a pic of it next to a 3030 led for comparison.

what about the back side of it can we see it .. ?
can you zoom on the front surface to see how many small dark dots it had..

by the way... the type info of the LED should be print at the strips lable

[Storyteller12]

Re: LG Nano91 TV Backlights

Diah,
Measured the led in beep mode and diode mode and got OL on both. No shorts but no reading either. As for size I cannot measure but I took a pic of it next to a 3030 led for comparison.

[Diah]

Re: LG Nano91 TV Backlights

lotas innotek build the ziner inside the led unit.

[lotas]

Re: LG Nano91 TV Backlights

Here ziner diodes are installed separately on the bar for each channel (4 leds).

[Storyteller12]

Re: LG Nano91 TV Backlights

I believe you. Thanks for the help. I will report back with my finding tomorrow

[Diah]

Re: LG Nano91 TV Backlights

You may be right. I have 6v led to put in and test but why would these measure 9v even when off the strip if there 6.4v?

I can remove a good led to test but I'm almost positive it will show 20v

dear friend... believe me and dont bleieve your tester.. LED tester good only^with normal LEDs with out ziner diode build in.

[Diah]

Re: LG Nano91 TV Backlights

They split down the middle into separate strips. But effectively it’s 8 strips 16leds.

i know same system with hisense nano.. i do believe 99.9% normal innotek led 6,4v almost size 3040
by the way.. the one you took it out just take look on the back side.. you will see only 2 pool

[Storyteller12]

Re: LG Nano91 TV Backlights

i think they are just normal LED from innotek 6.4V

You may be right. I have 6v led to put in and test but why would these measure 9v even when off the strip if there 6.4v?

I can remove a good led to test but I'm almost positive it will show 20v

[Diah]

Re: LG Nano91 TV Backlights

Ill have to measure with dmm later as I'm not at the office now but I don't think it measure open as the led lights up but only show 9v on tester

also dont forget to messure the size of it with mm.

[Storyteller12]

Re: LG Nano91 TV Backlights

They split down the middle into separate strips. But effectively it’s 8 strips 16leds.

[Diah]

Re: LG Nano91 TV Backlights

each 4 led from up / down strips or at diffrent postion share same line VLED and ending to one -

[Diah]

Re: LG Nano91 TV Backlights

There are 16 strips total with 8 leds per strip.

the photo lotas link to us showing 8 strips each 16 led lol..

[Diah]

Re: LG Nano91 TV Backlights

i think they are just normal LED from innotek 6.4V

[Storyteller12]

Re: LG Nano91 TV Backlights

Ill have to measure with dmm later as I’m not at the office now but I don’t think it measure open as the led lights up but only show 9v on tester