I assemble my first interactive panel and all bank do their sequence but in bank 2 i got five leds that does not light.



Leds number 201 203 205 207 209

I recheck my soldering and this time they where not turnig completly off at idle, i did clean my solder again and it get back to the initial state so they does not light up at all it is always the same leds.

Could you please give me a clue on that where i should chek first what soldering parts should i check.

Thanks

I am having some trouble understanding you.

It sounds like you are saying:
1. 5 LEDs were not lighting at all
2. You fixed them, and they were working, but not perfectly, and
3. You made it not work again.

Is that correct?

I'd suggest going back to the stage where it worked. These sorts of problems are usually due to poor solder joints, and it seems as though you have already figured out where the problem is.

No i did not get thems work yet, i have clean al my solder but i want to know witch part of the circuit should i chek i know the main chip is ok but i dont know about the resistor or other component that could have been burn when i soldered thems i this could be possible.

Or wich part should i chek to bad soldering parts cause all the solder seems ok and i worry that if i unsold and resold thems too many times i will broke it deffinitly.

Is that the resistor in 102 103 or or somewhere else i should chek first.

Thanks for you help

Can you please *clearly* describe the behavior of this quadrant?

You should not be unsoldering *any* parts of the circuit-- that's the single best way to end up with a truly broken circuit. You should instead be carefully visually inspecting the circuit to learn which solder joints are good and bad.

Visually they seems to be all ok the beahavior of this quadrant is the secon quadrant the led

numbering 201 203 205 207 209 does not light up thats all i could say for now

is possyble to jump the resistor with the equivalent one that left over on my kit so i could identify wich one could be defective

Thanks for you patiente

> the beahavior of this quadrant is the secon quadrant the led numbering 201 203 205 207 209 does not light up

Is the other half of this quadrant operating completely normally?

>is possyble to jump the resistor with the equivalent one that left over on my kit so i could identify wich one could be defective

It's very unlikely that you have a defective resistor. It's very likely that you have a bad solder connection somewhere.

Yes the other half of the quadrant work correctly, i will check for the solder

Also check to make sure that all of the LEDs are facing the correct direction.

Yes cause they have light up one time but they where not dim completely at idle.

Please make up your mind: Are these LEDs working or not? You said that it was not correct that they were working, but now you say that they are. I don't think that you're describing the situation accurately.

One time i recheck my solder they light up but they stay on when the sytem idle and this is not supposed i think. So i resold some place and then they get back to their prvious state as they does not light up at all and thats is how they are now. I probably have to soldering point who touch each other but i cannot figure where. thats why i would like to know witch circuit control these leds it is just 5 of 20 led in one quadrant and i know that the 15 others do the sequence completly and correctly is it R201 202 203 OR R204 207 208 AND so on.

Im sorry it is my first try with these

Thanks for your advices.

There's obviously more than one separate problem at work here. One of the problems is that your LEDs are not soldered correctly-- otherwise they would still be lighting. There may be a separate problem as well, but it's almost impossible to solve two problems at once. Solve the one first, then-- once you can describe the problem clearly -- I might be able to help further.

The circuit is complex, and the different parts all work together-- there is not a single resistor or other individual component that controls those five LEDs. The one thing that I can tell you is it is very likely (90%) that whatever is causing the problem will be a bad solder joint somewhere.

>I probably have to soldering point who touch each other but i cannot figure where.

Unless you're making giant blobs of solder-- which isn't safe-- it's more likely that you have a solder joint that isn't making a solid connection.


I'd suggest that you set this panel aside for a while while you work on the other panels. Having additional soldering experience may be helpful when you come back to sort this one out.

Sorry everybody for my lacks of knowledge!

It was a led with bad solder lead cause i resold the led themself and HOURRA it works...

First panel done, good things cause if everything goes like i want i will have to made 49 of these for a project.

Have nice day everybody!