Re: SAMSUNG Plasma PS51D450 no power

Hi. After trying to repair the shorted Y-sus for a few months I finally decide to buy a second hand Y-sus board. The TV works perfectly again. Thanks tom66!

Re: SAMSUNG Plasma PS51D450 no power

I am learning electronics while trying to repair the TV, so I'll probably say something very wrong, but testing the Y-SUS I detected something that seems suspicious to me.
As you can see in the accompanying pictures, in the Y-SUS there are 3 large blue capacitors in parallel (150uF 250v). My intuition tells me that these two wide tracks that they are soldered to should not be shorted, but they are.
Is that normal?...

Re: SAMSUNG Plasma PS51D450 no power

With just Y-main connected Vs/Va do not rise. I'll try to find a Y-main on the internet. I think I remember reading here that it was desirable to replace them in pairs ( y-sus + y-buffer). Is this also true for this model?
Thanks very much for everything. I'll update the thread once the circuit has been replaced.

Re: SAMSUNG Plasma PS51D450 no power

I can find 5 volts and 15 volts (instead of 13) on all pins of the PSU where they are supposed to be.

Re: SAMSUNG Plasma PS51D450 no power

Thank you. I've disconnected the Y-main (the X-main is fed through the Y-main) and Va and Vs appear briefly as you've explained. However, I can not hear any sound (I've never had the melody boot enabled). I've tried using the "source" button (is this the same as "input"?) but I do not get any sound. The ticking sound is still there, btw.

Re: SAMSUNG Plasma PS51D450 no power

That was quick! Thank you! I have carefully inspected the panel with a flashlight and I have not found anything unusual. How big is what we would be looking for?

Apart from that, when I plug the TV, besides the click of the relay, a noise is heard in the center of the PSU. I've uploaded to SoundCloud.
[url]https://soundcloud.com/user-49801249-146290282/r20150920-164622[/url]Re: SAMSUNG Plasma PS51D450 no power...have not found

Hello. I need help trying to fix my TV. It just stopped working suddenly while watching it and, since then, all I have when I plug it is the relay click and red led flashing 6 times. That's all, no image, no sound, no red led, although the red led flashes when I use the remote control. The logic board's green led flashes 5 sec on /2 sec off, which, according to the service manual, means DRV_RESET (no idea what that means). There is not voltage in Va and Vs. Never, not even for a second right after plugging the tv. However the voltages are correct in the flat cable that goes from the PSU to the...

Re: New Members - please post your introductions here

Hi. I'm Bruno from Spain. I'm 44 and don't really know much about electronics. But my Samsung plasma stop working two days ago and I need all the help I can get to try to fix it and save some precious money. That's why I'm here. Sorry for my poor english, btw.