Source for VIZIO Backlight LEDs?

[SLK001]

I have a Vizio E470i-A0 that has two blown LEDs in the backlight strips. I am looking for a source for just the LEDs (not the strips). The size of the LEDs on this panel are ~ 3.5mm X 2.8mm X 0.65mm. They come in a package like that shown here:

https://www.badcaps.net/forum/attach...1&d=1462581754

Notice that the larger pad is for the ANODE (+) on this package. Previous panels that I have repaired had the larger pad connected to the CATHODE. I still have a bunch with the larger CATHODE (I salvage them from broken screen TVs), but I cannot locate a source with the larger ANODE in a Vf range of less than 4V.

Does anyone have a source for these?

[budm]

Re: Source for VIZIO Backlight LEDs?

Did you try ALIEXPRESS?
http://www.aliexpress.com/af/LED-TV-...+TV+BACKLIGHTS

[SLK001]

Re: Source for VIZIO Backlight LEDs?

Did you try ALIEXPRESS?

I see that they have the LED in the size that I need, but most vendors don't bother to show what the bottom looks like, or what the polarity of the pads are. I'm really anxious about this panel, as the LCD is right now standing against the wall. These are so fragile that the sooner I get the LEDs back in and the thing re-assembled, the better I'll feel.

Did you ever buy these from Ali?

Can anyone verify if the polarity of these ALI LG LEDs are the same as the picture above?

[budm]

Re: Source for VIZIO Backlight LEDs?

This seller has lots of choices.
This one: LG LATWT470RELZK LED
http://www.aliexpress.com/item/LG-LE...00014.4.d8Pim3

Also SAMSUNG LED: Notes: no pad polarity shown.
http://www.aliexpress.com/item/SAMSU...00013.4.Qqe0Av

I would use minimum If of 400mA current rating.
Notes: I never try ordering anything from ALIEXPRESS, but some of the member here at B.C. recommended this LED.
BTW, does the LED strip has LG or INOTEK printed on the board some where? Most LED strips use LG LEDs.

[SLK001]

Re: Source for VIZIO Backlight LEDs?

BTW, does the LED strip has LG or INOTEK printed on the board some where? Most LED strips use LG LEDs.

This is the only printing on the strips (a long and a short):

https://www.badcaps.net/forum/attach...1&d=1462592500

[SLK001]

Re: Source for VIZIO Backlight LEDs?

This one: LG LATWT470RELZK LED

Would anyone have a datasheet for this LED, or is this another in a long line of unobtainable TV part information.

[budm]

Re: Source for VIZIO Backlight LEDs?

It is on that link to ALIEXPRESS LINK, including the footprint.
MODEL NAME : LATWT470RELZK LED

Manufacturer : LG
Origin : Korea
Package Model:Loaded Quantity 3600PCS Per Reel

Forward Current (IF ): 400mA

Pulse Forward Curren t1 (IFp): 650mA

Reverse Current (IR): 25mA

Reverse Voltage (VR): 0.8-1.2V (5mA)

Power Dissipation (PD): 1460mW

Operatin Tgemperature (Topr): -30 - +90 °C

Storage Temperature (Tstg): -40 - +100 °C

Soldering Temperature (Tsld): Reflow Soldering:260 °C
for 10secs

Hand Soldering:350 °C

for 3secs

Junctio Tnemperature (Tj ): 135°C

Forward Voltage (VF): 3.05-3.65V (250mA)

Luminous Flux (LM): lm (20mA)

Luminous Intensity ( IV ) : 23.5cd (250mA)

Wavelength (nm) : -nm mA

CIE : x=0.2960 y=0.2770 (250mA)

Color Correlated Temperature (CCT):

CRI : 80°

Viewing angle : 120°



Lead Frame Type LED Package: 3.5x2.8x0.60mm LxWxH d=2.0mm

[ozzy214]

Re: Source for VIZIO Backlight LEDs?

I got some strips from two different cracked screen leds. Do you want me to take pictures? Maybe you can canabilize the strips and pull the leds off..?

[SLK001]

Re: Source for VIZIO Backlight LEDs?

I got some strips from two different cracked screen leds. Do you want me to take pictures? Maybe you can canabilize the strips and pull the leds off..?

I would love to give it a shot.

[ozzy214]

Re: Source for VIZIO Backlight LEDs?

See attached pictures and let me know if they will work. These were not pulled from a vizio tv, but I have been noticing the panels use almost the same identical strips. AS my primary business is parting tvs out for ebay.

This is not the complete set, got lost as the set was apart for many months and the girlfriend decided to clean my work table lol.

I want to say these came from a seiki tv, but not sure. It had a good panel, but bad main board. And I had a hell of a time finding one, so parted it out.

If these wont work, I have a emerson 50" in my kitchen that will be coming apart shortly to sell the strips on ebay.

I also have a 32" vizio led with good panel and leds that I can possibly pull apart to see if the leds will work for you. Been waiting to find a good ma inboard for that, but doesn't seem to be happening. So probably will part that one soon.

Pm me if you want these and we can work out a deal on shipping and what not through PayPal! Or ebay!

[SLK001]

Re: Source for VIZIO Backlight LEDs?

Yes, those strips look like the ones in my panel. However, the similarity ends there. I'm pretty sure that the Seiki LEDs sink their heat through the cathode side - I've been pulling LEDs from a broken screen Seiki to repair other displays for a while. This LG threw me a curve with its sinking through the anode side.

I've included a side-by-side pic of the two strips. As you can see, the pads are nearly identical, but the polarity is flipped between the two. You have to remove one of the LEDs to see the polarity of the mount.

If you ever tear down your 32" VIZIO, I might be interested in those strips.

[ozzy214]

Re: Source for VIZIO Backlight LEDs?

How about these....totally different set up than the other ones. Only downfall is they not only screwed the strips in, but glued them in. So I will need a heat gun to extract. I have no idea at this point what brand of tv, sticker was worn on cover.


I also have strips I pulled from a insignia tv last night, but they look similar to others ones i posted.

[nicholas1110]

Re: Source for VIZIO Backlight LEDs?

There is a seller on eBay selling 5 LEDs in a set. They are the same ones that bud posted from aliexpress I'm sure just repackaged by someone selling in the us with smaller quantities. Anyways search lg innotek on eBay and youll find them. I've used almost the whole 100 peices I got from ali. So waiting for the lager quantities is well worth it. Make sure you use a good quality thermal tape to resecure them to the metal frame or you will have repeat failures. Hope this helps.

[budm]

Re: Source for VIZIO Backlight LEDs?

Hi Nicolas, so how are those LG LATWT470RELZK LED from the ALIEXPRESS, no defect and the color temperature are OK? I am ready to order 100 pieces to experiment with.
Can I get the link to the seller you got them from or it is the same seller I had on the link? How long did it take to get them?
Thanks.

[nicholas1110]

Re: Source for VIZIO Backlight LEDs?

Bud, they are the same ones and the same seller. I got them surprisingly very fast,took about 2weeks. The only issue I had with them is they are very fragile compared to the oem ones. I've accedently cracked them with the tweezers and did not notice right away and the quickly went open circuit. Since I have cracked about 10 total holding them with tweezers. Color wise they are good in the lg TVs. And the polarity is correct. I've ised them on Samsung led strips, the polarity is backwards so I end up trimming the trace on the board to allow it to fit ( yes I know it doesn't dissipate heat perfect then) but I have not had any issues at all with repeat failures as long as I secure the strips with 3m thermal tape and adjust picture settings. The color is whiter but hardly noticeable. I use bondic uv glue to resecure the lens,it works the best and cures instant. These ln series are by far the worst when it comes to led failures we have seen about 10 badly burnt ones and one that even got so hot the screen was affected slightly.

[SLK001]

Re: Source for VIZIO Backlight LEDs?

I saw the guy on eBay selling white LEDs - they are not the correct part. I ended up placing an order on Ali from this guy http://www.aliexpress.com/item/100PC...d-568b936e832f

This guy was more expensive than the others, but he was one of the few who actually put some good technical data in his ad. For instance, he gives the image below.

These ARE the exact parts. Maybe the higher price means that these aren't counterfeit devices - maybe I'm just deluding myself. Only time will tell.

[budm]

Re: Source for VIZIO Backlight LEDs?

It is strange that this guy with same P/N LATWT470RELZK has LED ANODE on the big pad:
http://www.aliexpress.com/item/LG-LE...00014.4.d8Pim3

And this guy in your link has LED LATWT470RELZK CATHODE on the big pad:
http://www.aliexpress.com/item/100PC...d-568b936e832f

I am looking for BOTH types, so who has the correct pinout?

[SLK001]

Re: Source for VIZIO Backlight LEDs?

It is strange that this guy with same P/N LATWT470RELZK has LED ANODE on the big pad:
http://www.aliexpress.com/item/LG-LE...00014.4.d8Pim3

And this guy in your link has LED LATWT470RELZK CATHODE on the big pad:
http://www.aliexpress.com/item/100PC...d-568b936e832f

I am looking for BOTH types, so who has the correct pinout?

Look again at the attached image. The circled 1 on the internal circuit diagram (lower left) corresponds to the circled 1 on the bottom view drawing (upper right).

[budm]

Re: Source for VIZIO Backlight LEDs?

OK, I see that tiny number 1 (ANODE) now for the big pad.
So that will the LG one I will order.
I am also working on the SAMSUNG LED backlights which has Cathode for the big pad.

[SLK001]

Re: Source for VIZIO Backlight LEDs?

I received an order from Ali for the LG LEDs. I ordered them on May 8th and received them on May 19th. They are just like the originals. The color and the brightness are comparable to the OEM LEDs in the set.

I have the set partially reassembled, up to the "put the LCD panel back on" stage. I'm going to wait until tomorrow to do that - more thought needs to go into it. Hopefully, I'll be successful and not break the glass.