Samsung UN60J6200AFXZC LEDs bad?

[imaddicted2u]

Samsung UN60J6200AFXZC has no backlight. Passes flashlight test and has sound.
The led strips part numbers are listed as BN96-29074A/BN96-29075A and there are 12 in the set.
Pin 1 of LED connector to chassis has 418 volts DC, rest of pins show 0VDC.
Would 418 volts be the LED power supply open circuit voltage and indicate an open circuit in the LED string?

[neilc6]

Re: Samsung UN60J6200AFXZC LEDs bad?

You want to repair TVs but still haven't bought a LED tester?

https://www.badcaps.net/forum/showthread.php?t=79972

[petehall347]

Re: Samsung UN60J6200AFXZC LEDs bad?

get a tester they are dirt cheap .i just got one and used it twice already .

[imaddicted2u]

Re: Samsung UN60J6200AFXZC LEDs bad?

I ordered a LED tester. Won't be here for a few weeks. Can anybody answer my original question? Thanks in advance.

[nomoresonys]

Re: Samsung UN60J6200AFXZC LEDs bad?

Should never get 418 volts if your meter is working correctly what else could it be but an open?

[imaddicted2u]

Re: Samsung UN60J6200AFXZC LEDs bad?

Should never get 418 volts if your meter is working correctly what else could it be but an open?

That's what I thought, just looking for confirmation. I figured that 12 strips with 7 leds each at 3 volts the LED supply voltage should be more like 252 volts. Thanks.

[nomoresonys]

Re: Samsung UN60J6200AFXZC LEDs bad?

Seems like bad led/s or connection in led circuit.

[budm]

Re: Samsung UN60J6200AFXZC LEDs bad?

You have open circuit in the LED strings.
The LED power supply Voltage rating and current is printed on the board: 326V 410mA.

[imaddicted2u]

Re: Samsung UN60J6200AFXZC LEDs bad?

You have open circuit in the LED strings.
The LED power supply Voltage rating and current is printed on the board: 326V 410mA.

Thanks budm. That would put the LEDs seeing about 3.9 volts on each of them. I'll set the backlight as low as possible after repair.
Thanks to everyone who replied.

[budm]

Re: Samsung UN60J6200AFXZC LEDs bad?

326v is not all across the LED strings, there will also be Vdrops on the PWM control MOSFET that is used for maintaining constant current through the LED string.