My 32X started working having issues the other day, and upon opening up to inspect it, 3 out of the 4 S-Video mod wires broke. It was one of the first mods I did, and I wasn’t as good at soldering as I am now. I tried reassembling it using the guide from my 32X S-Video post, but I realized my post had some incorrect information! This won’t do, so here’s my revised article.
First of all, I highly recommend checking out RetroTimeGames 32X S-Video mod. They have some great information and pictures on how to do this mod. I’m hoping my steps will help compliment his information.
So let me explain what we’ll be doing, and the diagram below to help with this. S-Video is simply a Luma (brightness) and Chroma (color) connection with a couple of ground connections. The 32X chip actually puts out Luma and Chroma, but it gets combined into ugly composite. We’ll be tapping into the Luma and Chroma signals to create an S-Video connection. Chroma can come straight off of the chip at pin #3 as shown below. The 2 grounds can also be easily grounded to the 32X. Luma is where it gets a little bit complicated.
The 32X video encoder doesn’t put out a strong enough Luma signal to go straight to S-Video, so we’ll have to use a transistor to amplify the signal. A transistor uses 3 legs, a collector (which takes power from a source, a base (which takes the signal), and an emitter (where the amplified signal goes). We’ll connect the collector to a capacitor already on the 32X where it will get it’s power from. Then the base will connect directly to the Luma signal on the video encoder. Then the emitter will go to a resistor, and then straight to the Luma connection on the S-Video port.
The very first thing we need to do after opening the 32X is remove a small surface mounted resistor. The resistor is right next to the video encoder chip and is labeled as R45. You can see it in the picture below. The best way to remove it, is to put a bit of solder on your iron, and heat up one side until it starts to move. Then use tweezers to pull it completely off. In later pictures you can see what it looks like with R45 removed.