Genesis S-Video mod problem

I'm trying to do an S-Video mod on my Genesis 1 VA6 and I can't figure why it's not working.

I'm using this tutorial http://retrotimegames.com/page13.html which seems pretty standard, and my picture looks like this.

http://i.imgur.com/oQB3rY0.jpg

Any help would be greatly appreciated.

 

Can you take some photos of your soldering job?

 

5V
http://i.imgur.com/oFaqWH0.jpg

chroma
http://i.imgur.com/h8FalrP.jpg

luma
http://i.imgur.com/hBpBc8V.jpg

socket
http://i.imgur.com/gr5qnQg.jpg

 

I did a similar mod on multiple cxa1145 based devices about 6 years ago. I remember having bad luck with North-American 2N3904 NPN transistors, but things worked well with eropean BC series. I think I used BC548 with great success.

Another difference is that I used amps for both chroma and luma.

Hope this helps, if not, I may crack my old systems open to see how I did it.

I took the original idea from viletim/eviltim: http://www.smspower.org/forums/viewtopic.php?t=11586

 

SUCCESS! I swapped my luma and chroma lines, and saw that I was using a 27k resistor, must have misread it. I didn't have a 27ohm so for the time I used a 43ohm, figured it was at least closer. Plugged it in and saw one of the prettiest Sega Genesis pictures I have ever seen!


Thank you so much for all of your help everyone!

 

Don't forget to insulate the wires. Don't want anything freaky going on.

 

Once I get that 27ohm resistor, I'm going to thoroughly insulate everything with tape. Thanks!

 

Glad you got it working! Care to post a photo of the working image? I'm curious as to what (if any) difference a 47ohm vs 27ohm resistor would make.

 

Here are a couple pics with the 43ohm resistor.
http://i.imgur.com/Ef5i0Jo.jpg
http://i.imgur.com/xnFtri3.jpg
http://i.imgur.com/3v3lbKj.jpg

 

Not much difference to be seen instantly but that picture quality is pretty superb. Well done.