NES stereo output mod

[keiffer01]

I always wanted to mod my NES system so it could output real stereo, but I can't seem to find any guide on the net on how to perform this. There is only one guy I found on the net who did this, but he doesn't give enough details on how to do it and he doesn't have enough pics of the mod. Does anyone here on Famicom World have the knowledge or has already performed this on their NES and would be ready to help me out and maybe send some pics? Thanks!

[133MHz]

Check here. Never tried it but looks better than just tapping from the CPU pins.

[keiffer01]

That's the guy I was talking about! I find that he doesn't show enough pics and some of his pics are somewhat hard to see where the wires are connected. I'm not a proffessional at reading schematics (I'm only 14! ) so this is really the reason to why I wanted more pics of how this is done. With some better pics I would be able to do this without a problem.

[133MHz]

Oh I understand. The pics are not very good at showing, but I saw the schematic and it's very straightforward. Feel free to ask what you don't understand of it .

Note: This mod seems very good and actually I think that it would sound way better with the ability to mix back some of the mono sound onto the stereo channels (like real stereo instead of just two channels into one speaker and three channels into the another). I would do it, but I don't feel like punching more holes into my NES (the only hole I made is for installing the speed switch, and that's in a way not to ruin the aesthetics).

[keiffer01]

I'm mixed up with the wires places. Three wires seem to be connected to the CPU pins; a red wire on the top part of the first pin, and two yellow wires on the top and bottom part of the second pin, all  held together in a shielded cable. So are all the three wires then connected to one of the RCA jacks together? And that green wire connected to the power supply, RF modulator and RCA Mono audio/video output module, is it connected directly to the other RCA jack, or is it connected to one of the 3 other wires? I'm all mixed up!

[133MHz]

And you mixed me up too . Better don't trust the pictures and follow the schematic .

[keiffer01]

Yeah I know but I have trouble reading one My dad knows how to read them but he says the guy seems to be missing some details. But my dad is a really lazy guy when it comes to help me out in electronics and games. Sometimes I need to help him and all when he needs help with his things but when it comes to my things he doesn't really care at all! Sometimes I'm trying to fix some game system that could be fixed, and as soon as I ask him some help he always says there's no way to fix it and just gives up. But when it comes to his things he takes all his time and repairs them neatly with love and care. Well I guess it's like that with everyone.

[133MHz]

As I said before, feel free to ask me what causes you problems with the schematic and I'll help you out .

[keiffer01]

To what is the green wire connected to? An RCA jack?

[133MHz]

It's going to the 'Mono audio' output on the schematic.

[keiffer01]

So the red and yellow wires tapped on the CPU pins are the ones connected directly to the RCA jacks, right? But I'm not sure; is that yellow wire split in two and tapped on the top and bottom part of one of the CPU pins or is it just some extra piece of plastic he didn't take off? And the mono audio is located where on the board? Sorry for being such a noob

[133MHz]

No problems man . But looking at the dude's wiring confuses me a lot while the schematic is really easy to understand. About what you're asking: apparently it's a piece of stray insulation (the one that touches the bottom part of the resistor). Either that or the shielded wire is grounded to that point As I suggested earlier, don't look at the pictures, it will confuse you (and me) a lot more.

EDIT:Also, is it good to get a dual potentiometer? The guy doesn't mention that.

[keiffer01]

ok i'll try not to look at the pictures. But when I check the schematics I don't have a clue on what to do. Since you know what to do, could it be possible to explain me clearly step by step? I opened up my console and I'm looking at the board right know, and I'm trying to figure out to where and to what to connect the mono out.

[133MHz]

Mono out:


Channel 1 & Channel 2:
CPU Pin 1 and Pin 2

I can make a crappy-mspaint drawing if you want
Maybe get a good hi-res pic of a NES motherboard and draw on top of it

My sister took the digital camera with her until tomorrow so I won't be able to snap any pictures for today

[keiffer01]

Yeah that's it! I'll take pics of my NES board, send them to you, and you can like paint the wires showing which goes where! I'll take pics right now.