Can't Find Source for LED Backlights

[SLK001]

I recently aquired an Insignia 32" LED, model NS-32E570A11. The screen works okay, but there is no backlight. Examining the backlights (which is side illuminated), I find that three are bad, so I begin to search for this particular LED. However, I can't find this one in any of my usual sources (ebay, Alliexpress, Digikey, Mouser, etc).

It is a twin diode, mounted in parallel, at approx 3.3V. It's dimensions are approximately 6mm x 3.4mm x 0.83mm.

Here are photos of the top and the bottom of this LED. Does anyone have a source for these?

https://www.badcaps.net/forum/attach...1&d=1482040971

https://www.badcaps.net/forum/attach...1&d=1482040971

[waterstrider]

Re: Can't Find Source for LED Backlights

why not just short them out first, then see if the brightness o the image is okay

[vinceroger69]

Re: Can't Find Source for LED Backlights

whats the part number on the led strips?

[SLK001]

Re: Can't Find Source for LED Backlights

The strips have LEXTAR on the connector end and 31T12-01a on the other end. There are four identical strips in the TV and each strip contains 36 LEDs.

[Moreno83]

Re: Can't Find Source for LED Backlights

You probably need these:

http://www.ebay.com/itm/100-pcs-OSRA...-/282075923023

Or search for Osram Duris E5.

[SLK001]

Re: Can't Find Source for LED Backlights

You probably need these:

http://www.ebay.com/itm/100-pcs-OSRA...-/282075923023

Or search for Osram Duris E5.

Too small, wrong footprint.

[vinceroger69]

Re: Can't Find Source for LED Backlights

The strips have LEXTAR on the connector end and 31T12-01a on the other end. There are four identical strips in the TV and each strip contains 36 LEDs.

i had a good look and cant seem to find replacement leds available did see this link though
http://www.tvparcasi.com/t315hw05-v1...1-up-31t12-01a

theres a few strips available but seem to be priced way too high in my opinion
http://www.ebay.com/itm/LED-Board-an...-/291811416683

[SLK001]

Re: Can't Find Source for LED Backlights

I find it surprising that even AliExpress has no LEDs like these. I find their footprint optimized to get maximum heat out of the device. Some of the devices available have such a pathetic footprint that they are destined to fail due to heat.

[capwizard]

Re: Can't Find Source for LED Backlights

Try to put two single unit edge LEDs to replace it, other small one is protection zener diode, not necessary needs it.

[SLK001]

Re: Can't Find Source for LED Backlights

Try to put two single unit edge LEDs to replace it, other small one is protection zener diode, not necessary needs it.

That was my backup plan if I couldn't find a direct replacement. I have the singles that should fit.

[budm]

Re: Can't Find Source for LED Backlights

If you are going to put two discreet LED in parallel, you will need to match them otherwise one may not light up or the current is not distributed evenly and cause it to burn up.

[Ltank]

Re: Can't Find Source for LED Backlights

I tried repairing led on two different sets. For me it wasn't worth it for a customer 's TV. I might attempt it if is was my 70" Sharp TV.
The leds are difficult to remove. They are use a heatsink/adhesive. When you put then back on, be sure you use heat sink adhesive or heat sink compound at a minimum.

[SLK001]

Re: Can't Find Source for LED Backlights

The leds are difficult to remove.

I clamp the strip on a heat plate set to approx 150C, then remove the individual diodes with a SMD hot air tool. This makes them a breeze to remove.