Attempting to get Gamecube component output with MX B012355 chip

I'm trying to get component out from my Gamecube using an MX B012355 chip, using the pinouts here and here, but haven't managed to get it to display (using a VGA to component lead, so that I can have just the one socket on the 'Cube once it's finished). I've checked all the solder points on the motherboard and the B012355 for continuity and they all appear to be fine. Following the pinout in the two links, I have five points from the Gamecube motherboard which aren't connected to anything - DetectCable, +12V, 27Mhz, BCLK, LRCK and Data. From what I understand, BCLK, LRCK and Data are only used for the digital audio mod and +12V is only needed for Terminal-D connections, but I can't help but think that DetectCable in particular needs to be connected to something - I have tried just grounding it, but that doesn't seem to achieve anything. Anyone care to make a guess as to what could work.

Incidentally, I have only tried this on my PAL Gamecube for the timebeing. There seems to be conflicting information online as to whether the PAL consoles even support component out, so information on this would be cool as well :encouragement:

This is my work so far...

 

Component out works on PAL consoles.

 

Yup, a mate of mine has an actual Nintendo Component Cable for his PAL Cube. He also recently bought it round to show me and tested it on my PAL cube. Both PAL cubes working perfectly with Component. They are really expensive cables though, think he paid £50 for it.

 

Out of curiosity, where did you get your MX chip? I've been trying to get one but the only guy I found wouldn't sell me one. (On GC-Forever forums).

If there is another source I'm all ears!!

 

I got 3 of them a while ago from an eBay seller in China, but he doesn't have any more. I had them sitting around for ages and sold one on eBay before deciding to go ahead and try and get it to work. No luck so far, but I've not spent too much time on it, as I've got a lot of uni work to do in the next couple of weeks. Hopefully I'll get it sorted over Easter.

 

If you ever want to sell the third one just PM me.

Good Luck with Uni.I graduated in December. Feeling pretty great now in my real job.

 

Hmm... just checked to make sure pins 5 and 18 were receiving +3.3V each, which they were, so the chip is being powered.

I'm trying to make out from pictures of the component lead on the internet whether CableSelect is required at all for component out, but my guess is it's only required to be pulled high for VGA out and serves no other purpose.

Another possible issue is the components I've used to populate my prototype board. The required components listed on the gc-forever wiki are hard to find in non-SMD sizes, so I've used a bit of a mix of parts:

- 80R 7A filters (I don't even know if these are the right type)
- 220uF 16V electrolytic capacitors (not a problem to find)
- 1uF 50V electrolytic capacitor (again, easy to find)
- 75R 1/4W metal film resistors
- 100R and 15R 1/4W carbon film resistors combined to make 115R
- 220nF and 10nF 100V polyester film capacitors combined to make 230nF (God only knows where 230nF capacitors are to be found - RS and Farnell don't even have them in SMD sizes)

Also, I don't know if I'm right on this point, but to combine the resistors and capacitors, I've arranged the resistors in series and the capacitors in parallel - if someone knows this is wrong, please let me know.

 

I tried tidying up the prototype board and soldering a bunch of kynar wires directly from the motherboard to the MX B012355, but still no luck :dejection:.

I'm not sure if my 230nF capacitor circuits are completed - when I put jumper wires behind them (or to the right on the first board on the photo, the Gamecube doesn't turn on at all)