Re: Proscan PLDED3992A-C led failure?
You can now use your led tester to find where the problem is with the top led strip.
You can now use your led tester to find where the problem is with the top led strip.
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Willing to help but I'm no expert. -
Re: Proscan PLDED3992A-C led failure?
You will have to probe through coating around each one. Trial and error to find +and- for each led. You don't need to check each led if you are going to replace strip.Last edited by dskall; 06-08-2017, 04:15 PM.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Proscan PLDED3992A-C led failure?
I cant find replacement strips so i will replace the individual faulty leds.
I removed the diffusers and tested each led
I think i found the faulty led on the end.
Plus the burn mark on the back of the strip is probably a good indicator lolAttached Filesif you find these attachements useful please consider making a small donation to the site
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Re: Proscan PLDED3992A-C led failure?
At what temperature and air speed do you use the hot air gun on the rework station?Comment
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Re: Proscan PLDED3992A-C led failure?
I use around 260c. With strips off the panel you can heat from bottom. I leave strips attached and heat from top. You just want to minimize heating led itself and melting. I heat strip till solder on pads melt and then drop led on and heat a couple more seconds. I also replace lens with led lit so I can center it over led so you minimize bright spots on screen.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Proscan PLDED3992A-C led failure?
If you warm up the led strip it helps to soften the glue sticking it to the metal chassis.
I heat up from underneath the faulty led using the hot air gun but basically identical to
https://www.youtube.com/watch?v=EZVQKEp6jxkLast edited by dick_barton; 06-09-2017, 03:03 AM.Willing to help but I'm no expert.Comment
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Re: Proscan PLDED3992A-C led failure?
i tried using the heat gun and it didnt work
i was afraid of using to high of a temp and possibly damaging the strip
but i will try again
thanks for the helpComment
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Re: Proscan PLDED3992A-C led failure?
Some leds weld themselves to the pads and may be difficult to remove. The strips are pretty heat tolerant.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Proscan PLDED3992A-C led failure?
i was able to get it off.
i had to raise the temp and lower the fan speed. i did burn it a little more but not bad
thanksComment
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I will just preface all this by saying that I have a fairly technical background but have never attempted SMD electronics diagnostics and repair before, I really like the idea and want to learn.
I have a MacBook Pro late 2016 that died maybe four years ago. Over the course of 30 seconds, it got slower and stuttered, until it froze for a second and died. No click from the trackpad anymore, nothing. I started getting interested in electronics repair and decided to give it a shot, so I opened it, removed the battery (one cell was puffy), took out the motherboard and experimented with...10-15-2025, 01:53 AM -
Hi There!
I'm trying to help my friend who owns a restaurant be just bought.
He has a very long LED strip running along all the walls and columns. The strip is attached facing down 2in above the floor, using a wall panel that ends in a metal rail that finishes the panel underneath
It's stuck using, I guess, the 2 sided tape that comes with the strip
The issue is that like 1/2 of the full length, including 1/2 one wall, another entire wall, and one column, flickers after 4 or 5 minutes ON. Particularly it flashes staying OFF most of the time and flashing ON for 1 tenth... -
Hi, I am installing a long led strip and I noticed that it frequently flickers slightly, it is not a strong nor regular thing, but it is noticeable and annoying. I have measured the voltage of the mains and it shows some fluctuations, it normally stays at around 226v, but often (every few seconds) drops down to 218/219v), and the flickering happens exactly at the same time. I have measured this at the counter and with every appliance off, so it's not related to the house electrical system, but that's how it comes from the supplier.
I know that the best solution would be to get a voltage... -
I wonder if i shorted the whole strip...where to put pos and neg to just light up a single diode...or the entire strip. The strip lit for a second...so maybe i fried it? What say you?
I have an adjustable dc power supply and was trying around 9 volts.
I have a pic of a single diode...where to put pos and neg terminals to light it up?
Pic of middle of strip..is this where i light the entire strip?
And pic of end...or does this light the entire strip?
Where to put pos and neg for single diode..multiple diodes and the entire... -
I suspect a lot of you have done a lot of repairs and end up with a lot of bad LED strips...what do you do with them?
Wonder if I should get a pile of LED chips and try to replace the bad units for the heck of it, but I don't really need the strips at the moment because I bought the strips...
Oh... and I think I got my TV working again, though not 100% I don't think, on a white screen I can see a bit of the ghost of the LED strips, must have done something wrong or the LED strips aren't quite the same as the original...
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