Re: Samsung PN50A450P1D Plasma - Audio No Video
Ozzy214, good find! I'm going to see if I can get that one. Thank you.
snowman0269
Member
Last Activity: 10-17-2015, 03:58 PM
Joined: 10-07-2015
Location: Jacksonville, FL
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Re: Samsung PN50A450P1D Plasma - Audio No Video
I'll check to see if I can see floating ground. The multi-meter I have is on the lower end. Just an FYI in case. Do I perform the continuity (beep) test, check normal resistances, or diode resistance? Sorry for all the questions. All the control boards I can find in the US with guarantees that they are tested are $70 or higher. Don't know if they are worth it to me tho. What do you suggest?
And of course, if/when I find a fix, I will post the solution so someone else doesn't have to go thru this.
Last edited by snowman0269; 10-08-2015, 11:52 PM.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Also, with the tests, can we rule out the panel itself? Or is it still in the running for being bad with the red snow?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Are the buffer ICs tested by putting one lead of multimeter on ground, and running down the 6 connectors, on both sides of the connector? I had also seen that quick test as well. It's worth mentioning that the screen looks exactly the same in test mode, or not in test mode. Does that pinpoint the control board?
I'm going to look into finding a control board in the US. Thank you again for all your assistance.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Oscilloscope, or is there another scope? And what are the f boards?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Same result unfortunatelyLeave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
When I did that, the TV came on, but with a red/violet snow on the screen. Can't get a good picture of it at all. Was I supposed to take it out of test pattern mode?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
And I still didn't find the vsch.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Is Zsus the one with the VE voltage? It's on the opposite side of the TV.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
The capital letters VSCAN, the top one gave me the -195, the bottom one gave me the -45 to -50. The "Vscan" gave me the 5.2. And these points are between the big green caps and the heatsink on the right side of my Ymain board picture....Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
By the way, the first time I tried reading those VA voltages down there, I put my multimeter lead on the right side, and accidentally grounded one of those pins by the metal. Fuse and VA still test well when I tested on the green board. All my voltages still good. Did I mess something up?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Fuse is good, VA voltage (56V) is good here too.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Oh, I see where it is. Which of those two cables puts out VA?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
No vsch, but vscan had two more test points. One reading -45 to -50 and the other reading 5.2. What side of my picture is that picture you posted? By the way, love your Heisenberg. Did you draw that?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Oops. Just saw your post. Lemme go look for vsch.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Mine looks almost exactly like the one in this ebay listing. The VSCAN point wasn't big like the others, however. It just looked like a soldered point, with nothing attached. But still had the correct voltage.
[url]http://www.ebay.com/itm/Y-SUS-BOARD-LJ41-05986A-LJ92-01516D-FOR-SAMSUNG-PN50A450P1DXZA-YM-529/272003482930?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33490%26meid%3D57fb2e38a48c43c9a954bfa0cc6eb28b%26pid%3D100011%26rk%3D2%26rkt%3D7%26sd%3D261643992194[/url]Re:...Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
The point I tested on the y-sus was labeled "VSCAN." Is that the correct one?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
That's the picture of the LED on the front of the TV. Is the control board the logic board? Or am I calling it wrong?Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Test patterns never show other than that blinking LED. TV looks like it's off other than that.Leave a comment:
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Re: Samsung PN50A450P1D Plasma - Audio No Video
Apologies, I missed a few pictures to upload. Here are the rest. And a quick note on this TV. To get the test patterns, you not only have to short PS_ON and ground, but also VS_ON and Standby 5V. Then short pins 3 and 4 on the test jig.
Thank you,
Matthew...Last edited by snowman0269; 10-07-2015, 01:21 PM.Leave a comment:
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