UN55D6000 Blinking Standby Light

[mmartell]

Re: UN55D6000 Blinking Standby Light

I managed to repair the ir/button board and zipped the whole thing back up.

Thanks to everybody for their help and input.

[mmartell]

Re: UN55D6000 Blinking Standby Light

Thanky

[freakaftr8]

Re: UN55D6000 Blinking Standby Light

Oh wow that looks great!! Congrats!!

[mmartell]

Re: UN55D6000 Blinking Standby Light

Yes I replaced the bad strip. Now I need to replace the ir/button board which I broke (tore off some pads). I have no idea where one pad leads to so I need a replacement.

[Ltank]

Re: UN55D6000 Blinking Standby Light

One step closer? What got to that point? Did you replace the LED strips?

[mmartell]

Re: UN55D6000 Blinking Standby Light

One step closer...

[Ltank]

Re: UN55D6000 Blinking Standby Light

Found some but dont know their reputation Price $13.98
http://www.tvpartsnow.com/product.php?id_product=6073

[mmartell]

Re: UN55D6000 Blinking Standby Light

CCFL Warehouse is getting into supplying finished LED back lights, but their selection is small and they don't have these. I would expect if things go the way they are you will see more of these on the market.

There is a little bit of info on the last pic which shows the colour temperature as 6.5K, not sure if anything else useful is there.

The discolouration on the led's btw was put there by me with a sharpie to mark bad ones.

[Ltank]

Re: UN55D6000 Blinking Standby Light

Wow.If you take measurements and unsolder one there maybe a a mfg part# on the back side next to the board. I have tried to find LED strips because I was currious and there are none to be founf through my normal outels that I use, I can find individual leds.
I have followed this thread closely beause I have a set with issues that I have not resolved and I am learning from this.
The old question, Is it better to know alot about a little or little about alot?

[mmartell]

Re: UN55D6000 Blinking Standby Light

Some pics...

[mmartell]

Re: UN55D6000 Blinking Standby Light

That was difficult - very hard to see with the damn light stabbing your eyes.

I managed to get this. 3.6v across working led.

As for amperage, well... there was a spark and POOF! Lower half of the left string (the portion with 19 out already) has gone dark. The good news is the upper half has gone to full luminosity

[tom66]

Re: UN55D6000 Blinking Standby Light

Measuring across the LED in both instances. Ammeter mode will make LED go off or very dark - this is OK.

[mmartell]

Re: UN55D6000 Blinking Standby Light

For voltage test black probe ground red probe other side of led ?

[tom66]

Re: UN55D6000 Blinking Standby Light

Yes, you can do that. We don't care if main board is working or not.

[mmartell]

Re: UN55D6000 Blinking Standby Light

Ya let me clarify that. I CAN run the leds as the default is ON with main unhooked is that good enough for the measurements ?

[mmartell]

Re: UN55D6000 Blinking Standby Light

Tom I can't take measurements atm as the tv is deaf dumb and blind because I broke the ir board so needs repair first

[tom66]

Re: UN55D6000 Blinking Standby Light

Show us a picture of the LEDs.

Then, take your meter and measure the voltage across the LED when it is at room temperature (allow TV to settle down to room temperature first.)

Then put your multimeter in 10A range across it, shorting it out, measuring current.

(Both done while TV powered ON.)

Then the replacement LED may be located.

[mmartell]

Re: UN55D6000 Blinking Standby Light

It might be tough trying to find drop-in led's so I'm going to try and get a used replacement strip and harvest what I need.

[Ltank]

Re: UN55D6000 Blinking Standby Light

Was there any part numbers on the led emitters so the bad less can be replaced? I looked online and found no led backlighting strips available. The listings at Mouser with size, wattage, Luminance, voltage, current etc is very long. Makes it difficult to look up the correct ones.

[mmartell]

Re: UN55D6000 Blinking Standby Light

All 20 tested short (continuity) though I didn't ohm them.

Strangely enough I'd doubt you could tell the difference in brightness from the bottom half left strip vs the right strip with regular programme material even though almost half are out. Can't leave it the way it is though as I DID notice a difference with the top left portion of the screen when the set was working.

Need a source for these led's if I can't get another strip...