Samsung LE32S62B 1s to black

[Half-Saint]

I was given this Samsung LE32S62B TV and I'm hoping to fix it. The symptoms are basically 1 second to black. The TV turns on, shows a picture for 1 second and goes black.

All caps look normal but I still replaced four caps on the right side of the board (1x 470uF 25V, 1x 1000uF 35V, 2x 2200uF 25V). I don't have any more 1000uF 35V caps to replace the rest.

The voltage on the big cap is 380V, didn't take any other readings. Both fuses are fine and nothing looks burnt.

Here's the picture of the PSU (Samsung BN44-00156A):

[ReeceyBurger123]

Re: Samsung LE32S62B 1s to black

Checked 24v rail and BLO ?

[Half-Saint]

Re: Samsung LE32S62B 1s to black

No, where do I check that? The connector that goes to the mainboard?

[ReeceyBurger123]

Re: Samsung LE32S62B 1s to black

The connector going to the inverter.

[Half-Saint]

Re: Samsung LE32S62B 1s to black

I took the measurements on the inverter side:
24V rail reads 24.4V
BLON reads 5.4V

P.S. Just noticed that this forum doesn't properly handle tags so here's the picture of the board.

[budm]

Re: Samsung LE32S62B 1s to black

How about pictures of the whole backside of the TV so we can see all the board?
So you do have 24Vdc and BLON, how about the DIM or PWDIM signal?

[Half-Saint]

Re: Samsung LE32S62B 1s to black

Here are some additional pictures of the TV.

I couldn't find any pins marked DIM or PWDIM. What am I missing?

[budm]

Re: Samsung LE32S62B 1s to black

https://www.badcaps.net/forum/attach...0&d=1456756726 Need closed up picture of that white connector so we can read the pin labels right next to the connector.

[Half-Saint]

Re: Samsung LE32S62B 1s to black

I took close-ups of said connector as well as of the same connector on the PSU side and the big connector that goes to the mainboard.

[budm]

Re: Samsung LE32S62B 1s to black

Pin 13 is the Dimmimg control pin, BTW, you will need to check the High Voltage Windings of the Inverter transformers next, and also the fuses on that inverter board.

[Half-Saint]

Re: Samsung LE32S62B 1s to black

I found three fuses on the inverter board and they are fine. How do I check the inverter transformers? What voltages should I expect? I'll check Dimming control voltage next.

[Sv3TL10]

Hello, I see it's a very old thread, but now I have here the exact same TV with the exact same problem.. Did you solve it and do you remember how 😀? Thanks