xarolium Posted March 3, 2009 Report Share Posted March 3, 2009 Hi,i know that there is a lot of topic about this subject but i read it but i didn't find the answer of my problemi have two led on my matrix who doesn't work the second led of the 5th row and the 7th led of the 7th row and all the other are oki control that led work fine and no problem and this not a bad solder is it possible that it doesn't work because it is different led than the other? or somebody have a other solution thank you Quote Link to comment Share on other sites More sharing options...
Futureman Posted March 3, 2009 Report Share Posted March 3, 2009 i control that led work fine and no problem Hey there, what do you mean by this? ^^^Are the 2 LED's in the right way? (Polarity)Are all your LED's the same make & colour?It's strange that just those two LED's don't work.. do they flash briefly when you turn your MB-6582 on? (I think all LED's do very briefly)It might be that the LED's are just broken, and need to be replaced.. If so, cut them out, then desolder each leg one at a time, instead of trying to desolder the whole LED at once.Good luck.RegardsMike Quote Link to comment Share on other sites More sharing options...
xarolium Posted March 3, 2009 Author Report Share Posted March 3, 2009 the led are in the right waythe led work fineit is the same color than the other but maybe not the same makedo you think it will change something?PS: i mean that i check that the led work fine with a external PSU Quote Link to comment Share on other sites More sharing options...
Wilba Posted March 3, 2009 Report Share Posted March 3, 2009 Do you check the LED is good with external power by touching the LED leads on the top? Or touching the pads on the bottom?Try also, supplying power to the pads at the bottom of the board (with resistor of course and no power to the MB-6582). i.e. try lighting up other LEDs by controlling the matrix at the JDx pads. This will test the tracks to the LED. If those LEDs do not light up with power, check if swapping +/- makes it work (test wrong polarity)My guess is the LED might be in the wrong way, you've perhaps tested it works with external PSU but applied +/- differently to how the matrix applies +/-. Alternately, maybe the solder joints are not good, and you're testing by touching the leads and not the pads.I don't think it is breaks in the tracks as that would mean more than a single LED in a row would not work (matrix tracks go straight through each LED pin, it's practically impossible to have a break that conducts around the LED pin... only a bad solder joint could explain that kind of problem. Quote Link to comment Share on other sites More sharing options...
Futureman Posted March 3, 2009 Report Share Posted March 3, 2009 do they flash briefly when you turn your MB-6582 on? (I think all LED's do very briefly) Quote Link to comment Share on other sites More sharing options...
xarolium Posted March 3, 2009 Author Report Share Posted March 3, 2009 'm shure that the led are in the right wayand i test the "continuty" ( i don't know if that make sense) between the leads of the led and the next led and it was oki will try to resold it or simply change it Quote Link to comment Share on other sites More sharing options...
xarolium Posted March 4, 2009 Author Report Share Posted March 4, 2009 i change it and it work fine now i don't understand anything because the led i changed was oknow i can play like a kid with this f-----g perfect machinthank's a lot wilba TK Smash and everybody who spend time in this project Quote Link to comment Share on other sites More sharing options...
Wilba Posted March 4, 2009 Report Share Posted March 4, 2009 Good to hear!Have fun! Quote Link to comment Share on other sites More sharing options...
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