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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

07-13-2015, 10:45 AM
Re: LG 50PS60 UA Plasma

Goood afternoon!

It's been a few months since I updated this thread, school has had me busy this past semester.

I replaced the Z-Sustain board in this display, and the fault didn't go away. After school was out, I ordered a Y-Sustain board and installed it.

I'm happy to report the television has a perfect display. The fault is gone.

Is there any tuning I should do? I'm afraid to attempt anything without consulting with you first!

Have an amazing day!

izzy

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-14-2015, 01:18 PM
Re: LG 50PS60 UA Plasma

I'm planning to order the Z-Sustain today. Keep your fingers crossed.

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 04:12 PM
Re: LG 50PS60 UA Plasma

Here's a video as well. That clicking noise is my dog walking around, not the television popping!

[url]https://www.youtube.com/watch?v=80YWw6bHshg&feature=youtu.be[/url]

I hope this helps! Whatever else you need, just let me know!

izzyRe: LG 50PS60 UA Plasma :) ...

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 03:49 PM
Re: LG 50PS60 UA Plasma

I will do my best, sir! My phone is AWFUL!

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 03:37 PM
Re: LG 50PS60 UA Plasma

Well, as luck would have it, my television has been on since I checked the Z-bias earlier. Both the Y-Sus and the Z-Sus heat sinks are hot, but I don't think either one is hotter than the other.

izzy

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 03:32 PM
Re: LG 50PS60 UA Plasma

This first project makes me wanna read books instead of melt my brain with TV

At first, it had that bluish screen that was all pix-elated. One afternoon, I turned the set on to get the readings you suggested, and I heard a "pop" and I lost the picture totally. That's when the Y-Sus board started "surging" and the readings were fluctuating every three seconds. So, I unplugged the Y-Buffer boards, and the Y-SUS board stabilized. So, I ordered the Y-Buffer boards, upper and lower, and my picture came back, but I still have...

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 12:46 PM
Re: LG 50PS60 UA Plasma

Zbias is at 104.5, I can see why the cost to have a television diagnosed is so expensive. LOL it can be rough on you!

I double checked all the connectors, they seem snug...

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 11:04 AM
Re: LG 50PS60 UA Plasma

I went back and double checked the voltage for the Va. The sticker says 68 Volts. This is a new video of what my screen looks like. I apologize for my camera

[url]https://www.youtube.com/watch?v=g8v0iP1eVKA[/url]Re: LG 50PS60 UA Plasma <br /...0iP1eVKA[/url]

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 06:59 AM
Re: LG 50PS60 UA Plasma

I'll go back and look at the label again today. I'll post a picture to make sure I'm reading it correctly. You and I both know I over look things! lol

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-09-2015, 06:36 AM
Re: LG 50PS60 UA Plasma

I've been combing through the forum, I can't find another board to test. Anyone have any ideas?

izzy

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 09:24 AM
Re: LG 50PS60 UA Plasma

the panel has it marked at 68 volts. Tom, you're really a good dude for having this forum, thank you.

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Last edited by Izzy_Reak; 04-08-2015, 09:25 AM.
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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 09:05 AM
Re: LG 50PS60 UA Plasma

I'm sorry, no, the fault hasn't changed. When the fault first occurred, my video on the TV was blue and grainy, like the video I posted. Then, after a day or so, there was no video, and the YSus board started surging. Now, the Ysus is stable, with the new Y buffer boards installed, and I now have video again, but the blue grainy appearance is still there.

I'm sorry for the confusion! And to think, I'm a radio personality in real life! lol

izzy

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 09:01 AM
Re: LG 50PS60 UA Plasma

I went back to double check the Va, still says 58.8. And steady

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 08:58 AM
Re: LG 50PS60 UA Plasma

But I enjoy learning to work on it, also!

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 08:58 AM
Re: LG 50PS60 UA Plasma

yes they are! you were correct about the buffer boards! If I lived in the UK, I'd just bring it to you!

izzy

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 08:47 AM
Re: LG 50PS60 UA Plasma

By new parts, I mean Y Upper and lower buffer boards.

Here's the youtube link to what my display looks like: [url]https://www.youtube.com/watch?v=3vZk3ZvofMc[/url]Re: LG 50PS60 UA Plasma <br /...k3ZvofMc[/url]

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

04-08-2015, 08:46 AM
Re: LG 50PS60 UA Plasma

I received my new parts yesterday! I installed them, and I have good news and bad news. The good news is, my display is once again illuminating a No Signal prompt. However, it's still in the distorted blue I described before, like the YouTube video I posted in the first comment.

So, I went back, and rechecked my readings:

-Vy = 180 (sticker says 180)
VSC = 149.6 (sticker says 150)
Vs = 194 (sticker says 198)
Va = 58.8 (sticker says 68)
Zbias is 104.5 (sticker says 105)

Should I measure something...

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

03-29-2015, 04:58 PM
Re: LG 50PS60 UA Plasma

Is it ok to use used parts?

Tom, you have been a very patient man. Trying to troubleshoot a television from across the pond is taxing at the very least. YOU, sir, are a gentlemen, and a scholar.

izzy

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

03-29-2015, 04:46 PM
Re: LG 50PS60 UA Plasma

I'm such an idiot. I was misunderstanding the whole principal of testing the Y-SUS board. I misread your instruction, and was reading just the positive mark on the resistor for the -VY and the VSC on the Y-SUS board. I was grounding the ground probe to the chassis, and only using that positive side. So just now, I went back and took more readings, the way you described it once again, and you're correct. With the Y-Buffer boards not attatched to the YSUS, the YSUS stabilizes, and gives me 150 volts on the VSA, and 179 volts on the -Vy. Just as the sticker...

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Izzy_Reak replied to LG 50PS60 UA Plasma

in Troubleshooting TVs and Video Sources

03-26-2015, 07:23 PM
Re: LG 50PS60 UA Plasma

No, sir. I am using the test tab for -Vy on the Y-Sus board using the red electrode, and the ground electrode attached to the chassis of the television. And, i'm pressing the red electrode to the positive side of the Vsc resistor. Should I measure directly across the resistor?

I'm sorry to be such a pain, Tom.

izzy

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