Samsung 39 LCD TV no light

[yobbgsm]

I have an exactly the same issue with this post, any idea please?

https://www.badcaps.net/forum/showpo...9&postcount=19

[budm]

Re: Samsung 39 LCD TV no light

Well, did you at least make any Voltage measurement to see what you get?

[yobbgsm]

Re: Samsung 39 LCD TV no light

Yes, same as mentioned above. Sometimes 206V or 210v. As quoted below.

"I have voltage only on 1 - D+ and 2 D+, When i switch the tv on voltage goes up to 221 the comes down to 218 on these two connections. I have no voltages on other pins."

[diif]

Re: Samsung 39 LCD TV no light

I have an exactly the same issue with this post, any idea please?

https://www.badcaps.net/forum/showpo...9&postcount=19

Why not fix it exactly the same way?

[yobbgsm]

Re: Samsung 39 LCD TV no light

Why not fix it exactly the same way?

What's the fix?? That post was not fix. Same here I replaced the leds but it keep on blowing up...

[diif]

Re: Samsung 39 LCD TV no light

What's the fix?? That post was not fix. Same here I replaced the leds but it keep on blowing up...

What LEDs did you use. They didn't answer the question.

[yobbgsm]

Re: Samsung 39 LCD TV no light

What LEDs did you use. They didn't answer the question.

Hi diif,

I used same 3v led, 3528 2835 1W. There is an a 8 leg IC close to CNL802, I am wondering if that is a led driver IC?

https://www.badcaps.net/forum/attach...1&d=1510788361

[diif]

Re: Samsung 39 LCD TV no light

Hi diif,

I used same 3v led, 3528 2835 1W. There is an a 8 leg IC close to CNL802, I am wondering if that is a led driver IC?

https://www.badcaps.net/forum/attach...1&d=1510788361

Some LEDs have the anode and cathode switched around, did you check you have the correct ones ?

What's the markings on the IC ?

[yobbgsm]

Re: Samsung 39 LCD TV no light

I tested the LEDs using my backlight tester. All strips / led are good prior to installing. IC appears 421 3013x 8609. That's the marking.

[R_J]

Re: Samsung 39 LCD TV no light

The ic's number is 3013X

[yobbgsm]

Re: Samsung 39 LCD TV no light

Its a Octal, 8-Bit Voltage Out DAC, not sure if that is related to the LED supply?

Thanks.

[R_J]

Re: Samsung 39 LCD TV no light

Nope, It is a 3013x, Very similar to a HV9910B or TS19450 LED DRIVER
The other numbers are mfg./date codes

[yobbgsm]

Re: Samsung 39 LCD TV no light

Thanks guys I was able to resolved this issue. It's the backlight I changed all the beads.