Genesis Model 3 Mod Help - Stereo Mod / Svideo (completed)

[terrybogard]

Whats up guys i need some guidance on how to complete my genesis model 3 mod.... I got svideo working but i need help wiring up the stereo jacks...

From what i think i understand so far:
The genesis model 3 has 2 different revisions. a mono version and a stereo version. easy way to tell is if you have a stereo genesis plug. just plug it in and see if you get sound out of 1 or 2 speakers. I cant do this since i dont have stereo AV Cable... I only have mono.

If its mono then you need to build an amp. which i dont know how to do and i dont understand electrical schematics well enough. I think the genesis model 3 has 3 channels... left, right, and sound effects. so if it is stereo i just need to find out how to merge the 3 channels into 2 and divide the sound effects to both left and right. I also needs the solder points to tap into.

My progress so far:

http://img121.imageshack.us/img121/5256/dscn3265a.jpg

http://img132.imageshack.us/img132/5378/dscn3262w.jpg

http://img263.imageshack.us/img263/2332/beforez.jpg

http://img227.imageshack.us/img227/9476/afterfu.jpg

[raylydiard]

what video encoder chip have you got?
i know i have done this on a model 2 mega drive uk model and i was wowed with the picture. i should do this with my model ones.

[weirdguy]

what video encoder chip have you got?
i know i have done this on a model 2 mega drive uk model and i was wowed with the picture. i should do this with my model ones.

IIRC, the model 3 only had Sony CXA1645, with a straight thru S-video output, just add a capaciter on each line and you're done. Anyone can correct me if I'm wrong.

As for the audio, do you have a schematic of the amp you have to make ? I can always help you figure it out.