Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
After swapping out the logic board, I am back to where i was before the swap. The voltage drops when the connector is attached to the y-main. Should i disconnect this, then the x-main makes a high pitched sound and heats up. I am not detecting any heat generated on the y-main. Again, the tv is not clicking at any point. Stumped again...
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
Yes. I actually tried the Samsung version. I still get the same readings with the voltage and video. No clicking.
[url]http://www.youtube.com/watch?v=JjrwTZC5nVg[/url]Re: Samsung PN51D530A3FXZA Plasma Bl...wTZC5nVg[/url]
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
Ok.. the latest issue. so i was sent the wrong y main and had to do a simple repair to the one i have. I did get another x main, as well. Now the tv will power on, show some static briefly, and then just have a blank screen. All voltages test correct when the ribbon cable from the logic board to the y main is disconnected. With it connected, the voltage is low. So now the tv should not have a fault from x or y. Would the logic board cause this sort of issue?
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
What confuses me, is why they would not put fuses into the y-main like I've seen on the older plasma/lcd's. It seems they have tried to cut costs on many different levels. My current plasma is only 1.5 years old and was very well taken care of. I've never done a tv repair before and the headache is definitely worth it to my bank account.
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
i found 5 bad components on one of my x main boards - the original. The other board had 3 shorted FETs. I bought a used y main x main and y buffer off of ebay. Hopefully, this fixes the issue. I will post when they arrive on monday.
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
Should I test these in circuit? I am noticing that most of the FETs on the y main are showing low resistance across the gate and the source (should be the outer legs I believe). There is only 2 of them with low resistance on the x main.
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
So I am testing the FETs on the x main. Do I put the black lead on the source and red lead on the gate before I swap to the drain to test output? or is it in reverse? If it's not in reverse, I believe I found one bad FET 30G124.
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Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
There is a LED on the logic board that lights up at once per second when the ribbon cable from the y main and logic board is disconnected and the power cable from the y main to the x main is disconnected. When it's all connected normally, it flashes roughly every 5 seconds.
How can I go about testing the FET's?...
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Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound
Ok, so my tv cut itself off about two weeks ago and started clicking immediately after. The video worked fine for approximately 2-3 minutes before this happened. I have a background in electronics, so I thought that I would figure this out on my own. HA. Well, I have replaced every board on the back of the tv except the video board. I cannot find any noticeable traces of a destroyed component. When all boards are connected, the relay clicks 5 times and shuts off. With the x-main disconnected to the y-main (they are daisy-chained) the tv powers up without video or backlight. However, the strange...
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