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Anyone know of a good replacement for the flyback diode on namco recoil guns? Some of the ones I have at the moment are showing a short, but they have no markings to tell me what they're supposed to be.

Hi, does anyone know what the value of the volume pot on the little button board of Naomi Universals/NNCs are supposed to be? Or does anyone know of a modern equivalent I can buy to replace it?

I've got (a different) MS9-29 that is showing a slightly diagonal green grid in one direction with what look like faint retrace lines. I've recapped this board already and the output transistors seem fine. Is anyone able to tell me where I should investigate? Please ignore the bad adjustment. No...

Hi! I'm trying to resurrect a clean-but-not-working MS9-29. This is my first time doing chassis repair. The symptoms are: Powers up fine, B+ around 76v, but with no picture. I can feel HV on the screen 30~ secs later something clicks and B+ goes to 110v (input voltage) and steadily trickles...

Hi everyone. I've got some really crackly sound on a Real Bout 2 I picked up. Here's what it sounds like: https://photos.app.goo.gl/7FskULiHUXedUraCA As you can hear its crackly and poppy and shifts from quiet to loud. The FM seems to be fine, it just seems to be with the PCM. So far I've tried...

Not my fault. Sega's wiring puts 12v on the red wire and 5v on the yellow wire. Ive managed to stick 12v on the 5v rail of my CPS2. Has anyone done this before? What is likely to have blown? Is it a gonner?

Hi, I've got a strange issue with a very slightly rotten top board (the bit with the cartridge slot) on an MVS MV-1B, my guess is there is a trace broken somewhere but there isn't anything glaringly obvious. Swapping it for a known good top board fixes the problem. The symptom is every pair of...

On a recent trip to Japan I noticed that nearly all of the Sega 6-button cabs I saw running Neo Geo games had some sort of rotary switch to change the button layout to some familiar ones, ABCD, AC|BD, AB|CD etc. Sadly I didn't manage to get a look underneath the panel to see how they achieved...

I'd like to make a generic Versus Kit for JAMMA games, something like a small(ish) board that plugs into the game and then plugs into two jamma harnesses to allow one game to span two cabs. As part if this I'd like the audio and video to be fully buffered rather than trying to get the game to...

Hi, I've got a UK Point Blank cab with a severe case of pincushion distortion and none of the adjustments can get it back to normal. My guess is there are one or two components that are on their way out, does anyone have any idea which ones they might be?