Unstablewarpfield

Would something like this work? I noticed my intellivision runs pretty hot and was wondering if an alternative (more modern) powersupply would reduce heat produced.

Would something like this work? I noticed my intellivision runs pretty hot and was wondering if an alternative (more modern) powersupply would reduce heat produced.

Would something like this work? I noticed my intellivision runs pretty hot and was wondering if an alternative (more modern) powersupply would reduce heat produced.

Would something like this work? I noticed my intellivision runs pretty hot and was wondering if an alternative (more modern) powersupply would reduce heat produced.

Would something like this work? I noticed my intellivision runs pretty hot and was wondering if an alternative (more modern) powersupply would reduce heat produced.

One last post in this topic. There was still some audible noise in the sound when I did this mod. Also some video noise was present. I know this mod is supposed to give a better result so in the end I decided to have a batch of pcb boards made. Installed them yesterday and the image quality is even better then with my home-etched pcb! I run this mod through an xrgb mini and have perfect video and audio quality from my Intellivision now. Happy!

Same here. I use an internal hdmi convertor and put it today on a 55" led screen in school for the kids I teach. Got an optional class going on called video game history :-)

Ok... I couldn't resist checking up everything one final time because something in the back of my head just told me that I was missing something. I checked the voltages on all the outputs and my sync line had about 2.5 Volts on it, which to me seemed odd. After inspecting the schematics one more time for errors I noticed this: It appears I put R772 before R733 instead of after it. I have no idea as to how this could have happened, but it did. I decided to correct it immediately in my board files and exported another gerber to be made. I guess in a couple of weeks I will know more about whether this fixed the problem. Tbh I am a bit fed up with this mod at this point and I don't feel like ripping out the board and start fooling around with wires.

For those who still wonder... after some more careful investigation I found out I am missing the 10 nF capacitor in the audio circuit . I quickly soldered one in and the problem seems to be much less now. (Still present a bit though). I might just leave it at this. It seems to be the best this mod is able to do for the console I have here :-)

Allright... I tested a scart cable with individually shielded wires and the problem still persists. It seems to be connected to the audio for sure. When I start up Spin out (where the audio is always present when you race) the jittery edges occur again, especially when I crash the car and the higher pitched sounds come in. The next thing I could do is disconnect the audio wire from the motherboard (8245 pin 27 I believe) so no audio is coming into the rgb board and see what that does to the problem. If it still occurs... I have no idea as to what could be causing this. I am running this through the xrgb mini on a samsung tv, don't know if that could have something to do with it. Could it be the audio signal coming out of the rgb board too high? Could it be the layout of components on the board itself? I don't know... we'll see more after some testing.

I'm jumping in here since I seem to have thesame issue, although I don't own that many games to test with. I also have a PAL unit with donkey kong not booting after the player choice, while other games (Smurph for example) work fantastic. Really blown away by the image quality btw Matthew. Running it through an internal vga-hdmi convertor on a large samsung lcd. Following this with interest.

Just getting back to my videopac problem a bit. My neo geo cable improved the problem a little, but the problem still persists. I took a short video of the problem to see if some of you wizzards here can identify the problem. If you look careful you'll see the edges of the pixels move as soon as some sound pops in. It looks like interference to me so I'm thinking to go with a scart cable that has individually shielded wires.

For the people who are interested... Here is part of the process on how I modded my Colecovision. The power supply used is this one. The VGA to hdmi box is an el cheapo model for testing purposes. I might replace it with a better one as soon as I find out which :-P