Re: Samsung UE46F5370SS dark, LED blinking

Dear all,

thanks a lot for your help !!!

But I'm still looking for a schematic diagram of the Power Supply Board SAMSUNG BN44-00611D. I'm quite sure that the power controller IC is damaged, but I have no reference number to order and change.
[COLOR="red"]
[COLOR="Red"]WANTED:
- Schematics Samsung BN44-00611D
- Reference of damaged 8 pin IC[/COLOR][/COLOR]

Thanks in advanceRe: Samsung UE46F5370SS dark, LED blinking

Dear all,
...

Re: Samsung UE46F5370SS dark, LED blinking

SMPS board: BN44_006111D


Yes, I have around 400 V at the big Elco 450V / 100uF. Also around 190 V at +1 for the backlight LED.

What I'm missing are the trigger (control-) pulses at the Gate (red arrow) of the high voltage transistor. As there is a small bulge on the control IC (red cricle) I guess and hope that this part is damaged.

I want to order it, but I don't know the IC's type, because I cannot read the label.

So, is there anybody who has a circuit diagram or can...

Re: Samsung UE46F5370SS dark, LED blinking

Thanks for your fast reply!

My SMPS is a "D" Type: BN44-00611D.

When I disconnect the cable from the SMPS to the mainboard nothing happens. The backlight is still dark. The backlight LED voltage is around 190V. The voltages on the negative side of the two LED strings are around 40-50V. The 13V for the mainboard supply have only 8.6V.

As I had no schemtics I checked by vision and saw that one 8 pin DIL IC has a small bump. Unfortunately I cannot read the label of the IC. Nearby is the...

Dear all,
my LED TV Samsung UE46F5370SS is (quite) dead. It seems to be the power supply. Instead of 13V I've only around 9V, the LED backlight is dark. The voltage of the backlight is around 185 V. I took my power supply and externally pulled up the 9V to 13V (appr. 700 mA). Now the TV begins more to live: The LEDS are flashing (every 3...5 seconds for a duration of 0.2 sec) and I could see a picture on the screen.
Has somebody experience with this sympthom? How can I repair the power supply? Has somebody a schematic diagram of the power supply? A similar schematics might also help...

Re: New Members - please post your introductions here

Dear Community,

My Samsung UE46F5370SS is dead, I've opened it but no idea to repair it. Unfortunately I've no schematics diagram and so no chance to systematically identify the root cause. Maybe the community coud help ;-) ?

Thank you