Diagnosing faulty led strings

[Pawtrax]

Any tools available for diagnosing and fixing part out/dim LV LED strings?

[sandy123]

(02-11-2021, 07:47 PM)Pawtrax Wrote: Any tools available for diagnosing and fixing part out/dim LV LED strings?

This question is a bit vague! Can you give more info on what the problem is?
Is it one 24v light string that has some LEDs out and some dim, or is it more than one string that you have the problem with (e.g. one string out and another one or two dim)?
If it's more than one light string you are having problems with, check your connections in the controller and also check for moisture.
If it's one string you are having the problem with - just 'bin it' and buy a new one as they are a pain in the neck to repair and then make them watertight again. You can try running your fingers along the whole string and also looking for damage to the wiring - might be a convenient point to resolder and heatshrink.
If you are running these light strings from the 24v transformer, be aware that you can burn the LEDs out if the transformer is not loaded up to nearly 5Amps as the transformer is unregulated and will pump out over 32 volts on low loads. This can cause the LEDs to burn out or the resistor in each series/parallel part of the configuration to burn out and you will lose the LEDs on that leg.
Hope that helps
Regards
Sandy

[jagnew]

(03-11-2021, 05:40 PM)sandy123 Wrote:

(02-11-2021, 07:47 PM)Pawtrax Wrote: Any tools available for diagnosing and fixing part out/dim LV LED strings?

This question is a bit vague! Can you give more info on what the problem is?
Is it one 24v light string that has some LEDs out and some dim, or is it more than one string that you have the problem with (e.g. one string out and another one or two dim)?
If it's more than one light string you are having problems with, check your connections in the controller and also check for moisture.
If it's one string you are having the problem with - just 'bin it' and buy a new one as they are a pain in the neck to repair and then make them watertight again. You can try running your fingers along the whole string and also looking for damage to the wiring - might be a convenient point to resolder and heatshrink.
If you are running these light strings from the 24v transformer, be aware that you can burn the LEDs out if the transformer is not loaded up to nearly 5Amps as the transformer is unregulated and will pump out over 32 volts on low loads. This can cause the LEDs to burn out or the resistor in each series/parallel part of the configuration to burn out and you will lose the LEDs on that leg.
Hope that helps
Regards
Sandy

Sandy, what is the best way to test a smaller No. of pixels? For example I am going to try my had at making some stars/Santa silhouettes and will need to power them up to test them when finished. Should I just use a smaller 24v 1amp supply for instance?

[sandy123]

Hi
First thing is that you should have really started a new Thread, instead of tagging onto this one. What could happen is that the thead gets so far deviated from it's original subject.
If you are cutting your LED strings (which are NOT Pixels!!!!!) and want to try them with a power supply, then 100 LEDs take approximately 250mA (so a 24v DC supply rated at 1Amp would be sufficient. Don't test your lights using the 24v Transformer and ac/dc converter (that will burn them out)
If you start a new Thread, then I will go into more details, although these have been explained in previous threads.
Hope that little bit helps
Regards
Sandy