[HARDWARE MOD] Increase the earphone output volume of your 3DS (some models so far).

Discussion in '3DS - Tutorials' started by KipMudz, Oct 20, 2015.

  1. Foxi4

    Foxi4 On the hunt...

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    To be fair, graphite is an awesome conductor, the only reason why it's not used extensively is because it's brittle, really. I remember companies making flex cables out of thin pieces of plastic with graphite "leads" sandwiched between them, specifically for laser applications, but I think they've moved away from that due to failure rates of such ribbons. You can still see carbon leads here and there - there's some inside the Dualshock 4, actually, and they're a pain in the ass. You could make whole circuit boards with the stuff if it wasn't so easy to wipe off. :lol:
     


  2. GuitarJav

    GuitarJav Newbie

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    Hola, I made a pseudo diagram, to show the measurements I was getting in the DSi xl, only the components and also with the impedance of the headphone:
    *I was testing the resistance of all the componentes near the area of the jack , and the continuity of right and left channel too, only this two components near to that area mark continuity.
    [​IMG]
    for me looks like this two pair could be ,but I have my doubts to see that it doesnt give me the same resistance that op.

    The conductive pen looks like an incredible idea to try, tomorrow I will go where my friend, which I tell you before,he will help me checking the board, if all looks fine ,make those blessed bridges in the resistors.Then everything will be happiness.
    thanks for all your time guys, I really apreciate all your answers.
     
    Last edited by GuitarJav, May 8, 2017
  3. GuitarJav

    GuitarJav Newbie

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    OK guys I did it; To the end were the resistors I was talking about (the ones that mark 98.7 - 102.7 ,the small ones), I'm very happy with the result, now it's heard quite loudly, that I even have to lower it a level so as not to hurt me. The small resistors was removed. I really like the sound characteristics of the DSi XL, That is why I wanted to complete the mod. Thank you for AALLL the help lend you guys, Now I can rest in peace.

    In the video the first 15 seconds its an approximation of how it sounds factory.
    After that I turn up the volume to the maximum.
     
    Last edited by GuitarJav, May 8, 2017
  4. Foxi4

    Foxi4 On the hunt...

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    Sweet! Job well done. I wasn't sure about those components, I'm used to SMT resistors being normally black, but to be fair, all SMT components look the same to me. You can't tell them apart without a good magnifying glass or a handheld microscope. I guess we have another machine mapped then - great! Just out of curiosity, have you noticed any markings at all on those things?

    EDIT: Oh, you mean smaller in size? The 100-odd ohm ones? Yeah, that'd make sense, actually.
     
  5. GuitarJav

    GuitarJav Newbie

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    I remove the ones that mark me 98.7(right side) - 102.7(left side) ,the small ones.
     
  6. Foxi4

    Foxi4 On the hunt...

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    Yeah, I figured it out after another look at the photo, I just wanted to be sure. :P
     
  7. Nazosan

    Nazosan GBAtemp Regular

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    My suspicion is the gray ones are capacitors for filtering. It looks like the results probably came out more or less just as they should and I'm glad it worked out. I sort of wish my headphones were sensitive enough to require turning down from the max like you say though. I still have to use an amp for any serious listening even with my more sensitive ones. At least it's more than good enough for all but stuff like music games though. On that note, the 3DS turns out to actually have a really good audio quality, but do NOT use the built in audio player software. I don't know what it does -- probably the filters it passes the sound through before the output to be able to do the effects (even if all are disabled) -- but the end result is awful. For a long time I thought the 3DS had a horrible sound system until Etrian Odyssey came out and proved how false this really was.
     
  8. Foxi4

    Foxi4 On the hunt...

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    Capacitors would make sense given the extremely low measured resistance. I have no idea what they're doing on an audio output, but hey.
     
  9. Nazosan

    Nazosan GBAtemp Regular

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    So I'd like to bump this up and ask: has anyone looked at the New 2DS XL? I presume it must have the same sort of thing, but I haven't pulled mine apart. I'm really adverse to the idea of trying this again, but it just feels like a necessity since it has rather low output even with these resistors bypassed as it is (nevermind how low it is without the bypass...) I'm actually trying out the New 2DS XL now since the 3DS XL was just too heavy and uncomfortable for me (it actually made my hands hurt) but this is a lot lighter. While the N3DS is great (I have a real one, not a N3DS XL -- complete with the nice SFC controller-like coloring on the buttons and all, so it's really nice) sometimes I guess a larger screen is nice (though I'm not a fan of how much more visible aliasing, dithering, and etc are since the resolution of course does not change.) If it actually works out, I plan to mod the speaker outputs (they currently go down out the bottom right about where your hands must be at least a little bit in the way if you actually hold it like a human) by drilling small holes going upward (not a lot better, but better than as it is right now) and if I do that I should kill two birds with one stone. I have to make sure it works out and doesn't end up hurting like the 3DS XL did though... Until then no screwdriver is touching it, let alone a soldering iron. I do think it will work out though, so I'd like to inquire about this ahead of time.


    BTW, I didn't want to bump this just to say it, but my guess as to why there would be capacitors would be to act as a final stage of filtering. I hear that supposedly noise picked up on the output of an OPAMP can still affect its operation somewhat, perhaps allowing a bit to get into the input. How true that is I couldn't say. Perhaps it's just to smooth out the power or something then for all that I really know. Perhaps it even could be that it's designed a bit poorly and lets a bit of DC through the line otherwise or something. (I'll admit I have never really fully understood the usage of capacitors -- exactly how they work in circuits together with other components and such. I only understand the most basics of how they actually function, but not really their actual usage other than as a simple high-pass filter or smoothing power inputs a bit.)
     
    Last edited by Nazosan, Oct 21, 2017 at 7:17 AM
  10. piratesephiroth

    piratesephiroth I wish I could read

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    Maybe the capacitors are there to prevent DC flow in case someone inserted some sort of power supply plug inside the headphone connector?
    Or maybe to prevent that kind of accident if it is connected to an external active device, like an amplifier.
     
    Last edited by piratesephiroth, Oct 21, 2017 at 7:40 AM