Help with Genesis 2 S-Video mod (CXA1145M encoder) - No signal. - FIXED!!!

[InsaneDavid]

Nice work to get it working! I figure I'll wrap up the last of this thread's questions...

The cable can get through the little hole that is in the right side on the back of the Genesis (what was it for anyway?).

The little hole on the back usually has a small threadded plate on the inside, looks kinda like a little M. It's the first part that goes missing when you open the console unless you're expecting it to fall out. The hole and threadded plate are there to accept a small screw that holds the Power Base Converter in place - completely useless since it doesn't require being screwed down to the system.

[77punk]

nice,thanks 4 the pix

[evildragon]

Nice work to get it working! I figure I'll wrap up the last of this thread's questions...



The little hole on the back usually has a small threadded plate on the inside, looks kinda like a little M. It's the first part that goes missing when you open the console unless you're expecting it to fall out. The hole and threadded plate are there to accept a small screw that holds the Power Base Converter in place - completely useless since it doesn't require being screwed down to the system.

I lost my screwy thing! lol

seriously though, even though I modded my model 1 system with RCA stereo jacks and component video, I try to keep all stock parts in it, and that seems to be the only missing part.

Crap, to a local junk yard to find an old dead Genny for it's M screwy thing.

[77punk]

looks like i might have fried something cause now even with the normal setting the screen is very dark. Ugh at least i tried it on a spare one and not the good one.

Do you have pictures of the bottom of this mod?
Thanks

[izarate]

You shouldn't use the same layout unless the circuit board is the same I used.

Here is the picture of the bottom of the board I used:


The S-Video pinout is fine. Just remember that the pinout is reversed in the female side (the one you'll solder).

[77punk]

Im using just left over plain circuit board so i can easily copy yours. I think i fried the last system but i did spend some money so im going to attemp it again. I wish i had a better camera.
The only area im skeptical in is the pin 15 and 16 entering into the capacitor. It should go through the yellow disk shaped thing on one leg and go into the blue capacitor with the flow of the arrow?

You shouldn't use the same layout unless the circuit board is the same I used.

Here is the picture of the bottom of the board I used:


The S-Video pinout is fine. Just remember that the pinout is reversed in the female side (the one you'll solder).

[izarate]

The capacitors must be placed in parallel, and the signal from pins 15, 16 must enter the dielectric capacitor from the negative side. The negative side is the one with the arrows so, if I understood you well, your capacitor is backwards.

The ceramic capacitor doesn't have polarity so it doesn't matter how you place it.

[77punk]

so yeah.. Im at the drawing board again. I got black and white picture but no color sometimes it looks like there is color but maybe when it pulls to much it drains the color signal or something. I have swapped about the pin and s-vid plug just to make sure both circuits were right and they are. I get the same output. ANy suggestions? I have tried about everything with the transistors unless the middle pin should go somewhere else. I bought the transistors from the shack and it had the layout of them on the back of the box so im 99.9% sure of its correctness..