hace 6 años
Cordial greeting, Juanamores, in the way that describes the damage in this console, I think the solution would have been more practical if you had cleaned the push-button microsuiches with some type of effective contact cleaner, this type of equipment the electronic card communicates between if both sides, that is to say the upper part with the one below, through the small eyelets that can be easily observed, some of them may have been isolated and it is most likely that it could happen since to remove any component of insertion This card has to be done very carefully if it is heated too much, the conductive tracks can be detached, these push buttons in question are the ones that send the different mixtures of the channels to the main or Main output and to the headphone output and pass first through the master controls of the main output and phones, so now it does not sound when handling such knobs. What you can suggest to the technician is to check thoroughly and measure continuity on both sides of the card in relation to the pushbuttons until the main outputs that track signal to see where it is lost, for these cases it is always best to use A suitable welding station to remove these components, the technician must have a signal tracker or simply follow the tracks with the multimeter, I wish you good luck in this repair, comment your results to continue in your support. Saaludos
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The button identified with the letter a) is the one that was giving me some downloads and is the one I use to press to speak with the microphone, This way I don't hear the music and it doesn't cause my radio broadcast on the internet.
Since the button b) I have never used it (that is, it was not used) I asked an electronics technician to change them, that is to put the b) instead of a) and vice versa.
This task that seemed very simple, desoldering 6 legs and re-welding them, took a long time to the technician, he told me because the tracks on the circuit are very thin and the hole where the legs come in too, so it took me a while to make the change of buttons.
When he gives me the work done, something happens that I cannot understand, the changed button that occupies the place a) does not work, that is, the one that was new, no matter how much you press it or release it it does nothing, and most curiously, that the one who occupies the place b) that is the one that was giving failures, now it does the same function as when it was located in the position a) , that is, logically and electronically the function of the buttons was reversed, working with the same fault for which I led him to exchange them.
But that's not all, something weirder happened, the potentiometer identified with the letter c) "Main mix" does not work, that is, even if you turn the knob to the left or right does nothing, and I add, I never had problems with that pot, or downloads or anything, it worked perfectly before taking it to the technician.
I add large photos of the repairs:
Now I add a general image:
Photo of the near potentiometer:
Front photos of the mixer:
I add the diagrams I found online:
If someone can give me a clue what may have gone wrong in that repair it would help me to talk to the technician and have it repaired quickly since I use it daily and I don't want to be spoiled with repairs.
A hug and thank you very much for the help you can suggest,
Juan
