Samsung HP-R5052C repair help

[VSK9999]

Hello,

I am an experienced electronic technician but due to the unfamiliarity with samsung plasma units I need assistance on fixing this 50" plasma.

I replaced the Y-Main Board. See photo:



The problem is I got a snowy picture on the whole screen. See photo:



What seems to be the problem that is causing the snowy picture? Any ideas on how to fix it?

--Thanks in advance

[DavidOH]

Re: Samsung HP-R5052C repair help

Have you checked the voltages? Don't know if thats it but I know it matters.
Here's the manual if you don't have it.

http://www.scribd.com/doc/34807692/Samsung-Hp-r5052

[cadiman]

Re: Samsung HP-R5052C repair help

Does the menu come up ok with crisp sharp lines? I see the caption letters look pretty good.

The buffers on these sets should always be replaced with the y drive board.

I have almost always had to do that with the samsungs.

As for now it looks like the y drive needs adjusted. Always start with the panel voltages as said above.

This will sound really crazy, but what are you using for an input signal?

[VSK9999]

Re: Samsung HP-R5052C repair help

Thank you for the replies

Also the link was very helpful.

@DavidOH
The voltages are ok according to what was written on the panel, doubled checked if this was the problem, and it seems to be alright.

@cadiman
My input signal is just the normal TV signal from cable, the cable works fine on my other LCD TV, no snowy picture and its crisp. I see from your post you speak from experience. Do we have to replace them both? The upper and lower buffer to where the y drive board is connected?
As for the old y drive board, the voltages are ok, this goes for the new y drive board as well. So for both y drive boards the voltages seem to be ok.

Thanks again for the replies I will try and post things that i find problematic