Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Hi Nick,
Thanks for the response. I'll go through all the connections again, but I'm pretty sure that they are all secure.
I did attempt the logic board test pattern, which removes the ribbon cable between the logic board and the main board. I would think that this removes the main board from the equation, and that I would get a good picture if everything else was working properly. However, I still get a dim, snowy picture during the test....
FrivolousShrimp
Member
Last Activity: 10-06-2017, 11:57 AM
Joined: 07-01-2016
Location: Charleston, SC
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
It is definitely not an inexpensive tool. If I knew purchasing it would guarantee solving this issue, I might consider it. I don't plan on fixing televisions regularly, so I can't really justify the cost. It sounds like you made a return on your investment pretty quickly.
I replaced the logic board with one from ShopJimmy. There has been no change in the behavior of the television. PTS electronics came back with a bit more detailed response to my inquiry as to what they repaired:
[INDENT][I]I...Last edited by FrivolousShrimp; 09-23-2017, 03:04 PM.Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
So perhaps the logic boards is faulty then. ShopJimmy has them for $24. It wouldn't be too much trouble to order one and test it out.
I'm still asking around about the oscilloscope. Typically I have no reservations about buying tools for any job, but I can't see myself using an oscilloscope again in the future....Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
I checked the capacitors on the Y-main. The ones at the top are a steady 215V, I forgot what the lower ones are. My notes are back at home. However, they were at a steady voltage, not varying. It seems the Y-main is functioning as it should be.
I'll ask around and see if I can find someone with an oscilloscope. It's not a tool most people typically have around. Out of curiosity, what would I be checking with the oscilloscope?...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Unfortunately I could not find a 65" VT or ZT Panasonic in my area when I was looking for a larger television. I spent a couple months scouring the classified ads with no luck; other than one person selling a ZT for a ludicrous sum. The Samsung I found for only $600. It served me well for 2 years, until it decided to quit and this thread started.
So I tested the voltages you asked for.
Ve = 91V
If the Vs you're looking for is the one at the top labeled SVC_Vs,...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
I'll keep trying if you have any ideas left! There is a picture of the X-sus on the first post when I started this thread. The camera flash is hiding the Ve test point, but the rest of the board looks pretty clear. Let me know if you need a better photo.
I was at Costco the other day and saw the OLED. I didn't have much time to look at it. But it was nice from the brief glance I took at it. Next time I pop in, I'll make a closer observation and check out the burn in issue.
I should...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
So I swapped out the X-main board. The picture still looks the same. I've checked all the connections, and they seem fine.
Is the green LED on the logic board supposed to blink when the set is on?
I received a response from PTS. It is a bit cryptic. This is what they said:
[I][INDENT]Your board was repaired it failed for power issues. Due to cold solder joints. Thank you and have a great day.[/INDENT][/I]
The grammar isn't exactly clear.
...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
I have no idea what happened to the set. It had been intermittently going in and out for a few months, and one day just completely died. If we had a power surge, or something to that effect, you would think that other electronics would have been damaged in our home. But nothing else is exhibiting any issues.
Could I ask what are FPCs?...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
So it has been awhile since I've posted an update. I finally received the PSU back from PTS. They didn't include any information as to what they fixed. I have gone ahead and sent them a message asking for specifics. As soon as I receive a response, I'll post it here. I've attached a photo of the board now. The only thing i can differentiate is the stickers they have attached at the top left. Other than that, I can't tell what they have done.
Now, after installing the repaired PSU, I am seeing voltages...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Thank you for all the help in trying to solve this issue. At least we narrowed it down to the most likely culprit. And I learned a few things along the way. I'm going to ship the board out on Monday. When I get it back, I'll let you know the outcome....Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
So I soldered in the new capacitors. There is no change in behavior of the unit. Vs still does not come up when plugging in the television.
I also tested the capacitors I removed from the TV. They both seemed to be within specifications of 0.033 μF.
Is there anything else you recommend I try before I send the board out to PTS electronics?
Thank You....Last edited by FrivolousShrimp; 08-26-2017, 01:04 PM.Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Transients, LLC switching edges. This is getting into a realm of Engineering I do not know very well. I'm a structural Engineer by training. This sparky stuff gets way over my head. I'd have to do some reading to really understand what it all does. Sometimes I think I'd like to go back and get a graduate degree in Electrical Engineering.
Digikey seems to be pretty quick on shipping. Hopefully I receive the parts and install them by this weekend. If not, off to PTS electronics it goes.
...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Would it be an issue that the capacitor on the board is rated 1250V, and the one you suggested is rated for 1000V? This is the problem I run into. Anything larger than 1000V doesn't seem to be kept in stock....Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
I guess I can give swapping the capacitors a shot and see what happens. If that doesn't fix it, I'll put the original ones back in and send it to PTS. I spent some time looking around for direct equivalents. I imagine I need to stick with the film capacitor. It seems Digi-Key has quite a few options, but only one is actually stocked. Everything else I saw has a lead time of weeks. Is this one an acceptable replacement?
[url]https://www.digikey.com/product-detail/en/rubycon/121MPE333J/1189-2132-ND/4157191[/url]...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Unfortunately, I do not have an oscilloscope. I'll ask around and see if any of my friends may have one, but I have my doubts about it.
The capacitors are 14.3mm wide x 17.5mm long x 8.5mm deep. The spacing between the pins is 15.0mm. I've attached photos of the capacitors.
I do have a capacitance tester. Is it worth removing them to test? My only concern is getting them in and out without damage. I imagine I can snip their leads off and solder them back on there. This way I'm not fighting...Last edited by FrivolousShrimp; 08-22-2017, 01:33 PM.Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
When I have both the X-sus and Y-sus disconnected from the PSU, I see Vs at 6V when the TV is plugged in. At initial plug in, I get a single click. If I also disconnect the ribbon cables, I get a continuous clicking and Vs will rise to about 13V until the clicking stops....Last edited by FrivolousShrimp; 08-22-2017, 09:50 AM.Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
Those are pretty high voltage. I had to crank the multi-meter range to the top end!
If the capacitors outlined in red in the attachment are the ones you wanted me to test, they move between 375V-389V....Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
I get 0V at Va at plug in, and it does not change over time.
All three fuses I marked in the attached photo have continuity. If I have missed any, let me know and I will check them....Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
So, for the pin labeled Vs_On from the PS to logic board, I get 3.2V when the TV is plugged in. It is only for 1 second at most and than quickly drops to 0V. I still haven't bought a quality multi-meter, so I don't know if there is any lag involved. I would think not since the other 5V pins jump to 5.3V almost instantly.
Vs never climbs higher than approximately 6-7V when plugged in.
I've gone ahead and ordered a returnable Y-sus board in the meantime. Hopefully I'll receive it in...Leave a comment:
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Re: Samsung Plasma PN64D7000 Flashing Red LED No Power
I'm guessing you mean to check Vs_On where the connector for the power supply to logic board is. Am I correct? And when do I check Vs_On, what should I expect to see? Is there a way to short or kick a signal through Vs_On to see if it would work? As in verifying if the PS is operating properly. Also, what is Vs_Con?
From what was written earlier in the thread, I thought even if the sustain boards were bad, you would see Vs at the proper voltage during the first 3 seconds of plugging the TV in....Leave a comment:
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