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I have a DMG that I put a white backlight, 1/8" pro sound, and half clock in and now it hums.
like electronic hum coming through the speaker. even when the volume is turned all the way down the speaker hums.
it is constant and annoying.
I have the backlight connected to the cap on the front of the board and the pro jack connected to the volume pot points.
any ideas what could be causing this?
its most likely the clock if any of those methinks,
is it a clock kit, just another crystal, or what? and, how did you wire it up?
its your half clock and its wired exactly like in your diagram shows.
I wrapped it with electrical tape too.
I have a radio shack spdt switch on the right side of the shell if that makes any difference.
and you removed the original crystal right, and aren't wiring up some crazy switching mechanism, right?
(just to check)
it might be where you've located the easy_CLK board itself, the speaker's magnet might be picking up hum from that. try moving it somewhere else inside the case, away from this magnet.
just the board and the switch inside this gameboy.
a regular spdt switch located on the right side of the shell in the empty space about 2" inches above the speaker and the board is right behind the screen, resting above that copper shield.
nowhere near the speaker.
just the board and the switch inside this gameboy.
a regular spdt switch located on the right side of the shell in the empty space about 2" inches above the speaker and the board is right behind the screen, resting above that copper shield.
nowhere near the speaker.
hmmm.
then check your solder points again for a short. or post pics of your work and we can check it out.
the half clock board is working right? just the speaker hum is the only issue you're noticing?
the only other thing I know to do would be to work through each mod, disconnecting it from the other circuitry, and do process of elimination. i was thinking the clock signal was getting into your audio path somehow and you were hearing it as the hum. but maybe not. as a generator of the hum, i suppose.
the other kits, the parts themselves, wouldn't do this. poor soldering can cause all sorts of issues. also in the backlight installation, something could have been damaged on the front PCB or any number of things. if it were me, and i wanted to get this figured out quick and not worry about it again, i'd just go through each mod, disconnect it, and see if it fixed the issue. start with the clock, then backlight, then prosound.
a ton of people have used similar configurations in their DMGs and gotten no issue, so i'm sure its not a compatibility issue.
check the tutorials again, and make sure you hooked everything up right of course.
and to just ask.... are you positive the hum wasn't there to begin with?
Im not near a camera at the moment but I'll take a pic ASAP.
everything works fine. only the speaker hum. and it's been awhile since I modded this gameboy so I can't really say that the hum wasn't there to begin with but to my best memory it wasn't.
it's a really clean gameboy I was impressed when I got it how clean it was I put the mods in and closed it up and haven't bothered with it til now because everything worked and I don't like opening them unless I have to because of the stress on the ribbon cable.
it could possibly, if you haven't switched them out and they are stock (even in a Play It Loud!), they are *technically* past their expected life span.
its sort of amazing what recapping can fix. and, i should have caps back in stock asap, just waiting on one of them thats backordered.
Is it only with this one particular gameboy? you dont have a ground loop or something?
I don't remember if I changed them out or not its been awhile since I modded this one.
lets say I did if I reversed any of them could that be it? or would it even function if I reversed any of the caps?
I don't remember if I changed them out or not its been awhile since I modded this one.
lets say I did if I reversed any of them could that be it? or would it even function if I reversed any of the caps?
I know very little about the DMG hardware, but for sure I can tell you that if you reversed the polarity of an electrolytic cap (the ones with polarity), it will for sure not work properly.
Long ago happened to me that I reversed the polarity of a circuit by accident (which had one electrolytic) and after that it never sounded the same (though it kept working).
Long ago happened to me that I reversed the polarity of a circuit by accident (which had one electrolytic) and after that it never sounded the same (though it kept working).
did you ever change that cap back to normal and did it sound the same after that?
maybe I'll switch the caps out for the hell of it.
and I forgot to mention that I switched the power LED to white and this is a play it loud
Yeah I mean I inverted the polarity once, being the same circuit, and the capacitor staying the same, but after having some current in the wrong way for a rather short period of time, it never worked the same, being in the correct position and with the circuit working normal. It modified the sound completely (to a rather bad way).
Try switching the caps, yes. It's not a big deal economically, and anyways the least you can get is improve the life of your DMG sound.