Led panel issue, please help.

Boatguy

Boatguy

Well-Known Member
vamoz said:
That issue with the short to the chassis is resolved by itself. I did not check the continuity from the chassis to the LEDS (put the black tip to chassis and red to the plus of the LED?)

I went to the electric shop to buy a diode but they said I have to go to a LED blah blah place for it and today they are all closed.

I did desolder that diode and took it off. If i were to run a cable, i attach the - to - and + to + of the next diode?
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Yes black tip to either the led or the chassis and same with the red. If there is continuity there shouldnt be.
If they are in a series you only need to run one wire from the left side of the dead led to the left side of the next led.
Think - + - +
 
V

vamoz

Member
Boatguy said:
Yes black tip to either the led or the chassis and same with the red. If there is continuity there shouldnt be.
If they are in a series you only need to run one wire from the left side of the dead led to the left side of the next led.
Think - + - +
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I don't think they are in series. I tried and it did not work. (The wire) Well it did work but not quite. They became "alive" but did not emit light as they should. But they became alive, does it make sense? (Almost as if they were set to 0 level but they are at 100)

I checked the continuity from the chassis... dumb question; should the device be active? plugged in and working while I check or off? ( When it is off, there is no effect. When it is on, the first 4 leds light up when I touch the chassis and + of those leds.)
 
Boatguy

Boatguy

Well-Known Member
It should be off. If they light up when you have it plugged it and make the connection to the chassis, it means you have a break in the string and its finishing its path to ground through you and the chassis. May be an internal problem with the pcb. You might be out of luck getting those strings working if thats the case.
 
V

vamoz

Member
Boatguy said:
It should be off. If they light up when you have it plugged it and make the connection to the chassis, it means you have a break in the string and its finishing its path to ground through you and the chassis. May be an internal problem with the pcb. You might be out of luck getting those strings working if thats the case.
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But if there was break in the string they wouldn't all become alive (whole two rows) when I touch the dead lead to alive LED.
even though they dont emit light, they light inside.
 
Boatguy

Boatguy

Well-Known Member
Rather than checking each individual led you can check for continuity from each led to the next and see if you find the break that way. May help you sort out how the panel is wired.
 
V

vamoz

Member
Boatguy said:
Rather than checking each individual led you can check for continuity from each led to the next and see if you find the break that way. May help you sort out how the panel is wired.
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Good idea, I did that and it goes like this. + to + gives the light to the next one. It is continues...minus the IR lights. (P.S. old pic, I already taken off that first led)

111 (1).jpg
 
Boatguy

Boatguy

Well-Known Member
vamoz said:
Like buying a diode xD. hopefully, that should fix it? We will see tomorrow. Thank you so much for all your help, I really appreciate it.
Click to expand...
Hopefully that does it.
You can check the output of the driver to that string by putting the multimeter probes to each end of the string with the unit on, and also check the dimming function to see if its working.
 
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