Samsung UE32F5000 no Backlight

[toncsi07]

Re: Samsung UE32F5000 no Backlight

Hello!

I also had a samsung eu32f5000 led tv with the same problem and I found the wrong LED with multimeter. If you have other pieces of the led strip, could I buy it from you via eBay?

Thanks!

[flocko]

Re: Samsung UE32F5000 no Backlight

Hi go to my eBay listing item number 262516863370 and select postage for Hungary

[cts_casemod]

Re: Samsung UE32F5000 no Backlight

Assmuming a properly designed driver, (and I assumed this is one as the whole string failed) one can simply short a failed LED. The driver will keep the string current constant, so it doesnt matter if it sees 51 or 49.

And yes, as other poster sugested, using only half of the power is a good thing, but it serves its purpose better on the newer 'flicker free' tv's whose LED's are fed with a DC current.

The older models use PWM, so the devices are always lit at full power, just the duration of which (time on versus time off) is varied.

[pulsedia]

Re: Samsung UE32F5000 no Backlight

Also my UE32F5000 have problem with backlight but when i ceck the voltages only +1 gives me 255Volts all the others mVolts measurements i think that maybe the two MOSFETS D3N40 have problem because all the others voltages for the main board is ok also did anyone knows what type is the IC9191?

[budm]

Re: Samsung UE32F5000 no Backlight

That is because you have open circuit in the LED string some where, it has no load that is why it went up so high.

[pulsedia]

Re: Samsung UE32F5000 no Backlight

I measure the voltages without the connector is it ok only the +1 pin have voltage the others?

[budm]

Re: Samsung UE32F5000 no Backlight

Put the LED connector back in place and see what you get. LED strings are connected in series so when you removed the connector you break the circuit for the current to flow.

[eniac22]

Re: Samsung UE32F5000 no Backlight

i have the same problem with my Samsung UE32F5000 TV, on the backlight connector i get the follow volts

-1 : 0 V
+1 : 195 / 224 V
-2 : 0 V
+2 : 0 V
-3 : 0 V
+3 : 0 V
-4 : 17V /85 V
+4 : 0 V

the power board is bad? Can repair it?

[budm]

Re: Samsung UE32F5000 no Backlight

You have open circuit in the LED string.

[eniac22]

Re: Samsung UE32F5000 no Backlight

Without the lcd cable connected i must have in all pin a voltage because i try it and i get voltage only on pin +1?

[budm]

Re: Samsung UE32F5000 no Backlight

+1 pin is the feeding Boosted Voltage pin to the Anode of first LED string, if there is open circuit in the first string then there will be no Voltage on the rest of the string. The connector on the board is used as the junction point to join all the strings together in series.

[o0larry0o]

Re: Samsung UE32F5000 no Backlight

Hello There,
My TV stopped working again, it was forseen haha

I Couldn't remember the PIN order, it's pretty confusing on the LED Driver.
could someone give me a hand ?
thx a lot

[budm]

Re: Samsung UE32F5000 no Backlight

Hello There,
My TV stopped working again, it was forseen haha

I Couldn't remember the PIN order, it's pretty confusing on the LED Driver.
could someone give me a hand ?
thx a lot

The LED connector pin chart is printed right on the board.

[o0larry0o]

Re: Samsung UE32F5000 no Backlight

yes I know but I don't understand it ahah
I don't know where the 1 is, or what's the order, the chart is not that easy to understand

Sorry about that....

[budm]

Re: Samsung UE32F5000 no Backlight

yes I know but I don't understand it ahah
I don't know where the 1 is, or what's the order, the chart is not that easy to understand

Sorry about that....

Show us good clear pictures of the LED connector and the chart printed next to it.

[o0larry0o]

Re: Samsung UE32F5000 no Backlight

Here it is !
thx a lot

[o0larry0o]

Re: Samsung UE32F5000 no Backlight

I figured it out I finally understood the chart.
-4 was 0v, found the fault LED solder a new one (good idea I had to buy several ^^)

keep this thread alive guys !!!

thx a lot

[budm]

Re: Samsung UE32F5000 no Backlight

I figured it out I finally understood the chart.
-4 was 0v, found the fault LED solder a new one (good idea I had to buy several ^^)

keep this thread alive guys !!!

thx a lot

I am glad you figure it out on your own, feel great doesn't it?
Thanks for the follow-up.

[o0larry0o]

Re: Samsung UE32F5000 no Backlight

indeed it does
I guess I had the same problem couple of years ago ahah

[o0larry0o]

Hello budm or flocko

My UE32F5000 led strip died again .... I had on LED left yay, so I replaced it in 15 min
During the repair ... I broke the LCD panel .............. yaaay ...-_-

I'm trying to found it online, but can't seem to find a website that sell it.
I don't know where to find the exact reference.

On the Panel itself I can see this ref : T315HW04

other than that here are some pictures.



Any help to find the whole LCD panel would be greatly appreciated.
thx a lot