VIVAX LED TV 32LE60 backlight problem

[rtstorm]

Hello, i got this LED TV with bad backlight. I disassable it and TV has 2 set of line with 10 small SMD LED diode. (total 20 diodes) I found that 2 diodes were dead (one on each line). I found similar LED diode and replace them. I tested the whole line with 30VDC and it worked, but when i connect to tv LED burned.

The output of main board is 60VDC when turn on backlight, what is the problem here is the problem that LED i use is not enough Amps?

[dick_barton]

Re: VIVAX LED TV 32LE60 backlight problem

Was it the replacement leds that burnt?

[rtstorm]

Re: VIVAX LED TV 32LE60 backlight problem

yes, only those 2 led i replaced burned. I think they cannot handle that current. I check the other LED they handle 0.08A at 3V. The one i use is less than 0.01A at 3V so i think that is the reason why they burned.

The LED are 2.8mm x 3.5mm

Do you know where i can find them online

[budm]

Re: VIVAX LED TV 32LE60 backlight problem

You want at least 300~400mA range LED. They drive those LED hard so they fail, you should turn down the backlights level after are fininsh repairing.
What does the LED look like?

[kc8adu]

Re: VIVAX LED TV 32LE60 backlight problem

yes your replacements were rated for too low current.
post pics.
i had a 55" samsung with bad leds.they were 5630 type run at 150 ma.
i found some in bulk on ebay cheap.they were yuji high cri rated 250ma.
but polarity reversed and 6000k. originals were way cooler .it looked better to the customer than a newer set.i am glad i got the reel of 5000 once i figured out the real cost.
seller didnt know what he had.

[rtstorm]

Re: VIVAX LED TV 32LE60 backlight problem

It is 2835 LED, i think that 80mA will be ok. I cannot find 2835 LED that is above 100mA

[ReeceyBurger123]

Re: VIVAX LED TV 32LE60 backlight problem

It is 2835 LED, i think that 80mA will be ok. I cannot find 2835 LED that is above 100mA

Read what Budm said. They push the Leds up to 400mha in these cheap Tv's. Look up for "Led strips out smashed Tv" on ebay and do the stacking method of repair.

[budm]

Re: VIVAX LED TV 32LE60 backlight problem

Can we see the pictures of the LED strips and the LEDs?
http://www.aliexpress.com/wholesale?...=LATWT470RELZK

http://www.aliexpress.com/item/100PC...6-b17a37c8c856