You may have gotten more-useful answers originally if you said "I want to construct an MCR-to-JAMMA adapter" in that thread instead of asking "Has anyone run Satan's Hollow with a switching power supply". Reading your original post I would assume that you had a dedicated game and wanted to change the power supply because you couldn't figure out how to fix it.
It would make no difference because either way because it came down to what the best option was for powering the board set
without the audio problem.
The topic was using a switching power supply with Satan's Hollow because at the time I didn't have the MCR power supply PCB and I was hoping that I could get by with just a switching power supply.
But the posters convinced me that the only way to get around the audio hum was to get an original MCR power supply for the audio. (And I wanted to use a switching power supply for everything else).
Now
this thread is about making a JAMMA adaptor, and in order for me to make a JAMMA adaptor I'd have to figure out how the game is supposed to be wired first.
That is why every pin that is used has to be accounted for, as far as exactly what each carries, and I can't determine this by looking at those schematics.
MCR games are a pain... and you don't even have the original cabinet? Yes your project will probably be a giant headache.
- Paper manual/schematic is available (
ebay,
ebay) and may be faster-to-use and clearer than the PDF.
On the contrary. I have that and the writing is too small for me to see, which is why I'm forced to do things the hard way with a the PDF file.
- The bigger (power) connectors look like Molex KK 0.156 (
link). You'd need to measure and verify. The 20-pos is extremely wide; not sure if you'll be able to purchase that.
- The smaller (video, controls) connectors look like Molex KK 0.100 (
link). You'd need to measure and verify. The 19-pos and 23-pos are extremely wide; not sure if you can purchase these either.
I'll figure out the name of each connector I need. What's important is what is connected to what. But before I can get to that part I have to determine the pin numbers. Every pin in every conenctor is supposed to have a number.
- Forget about the 90412 power supply. You said you're making an MCR-to-JAMMA adapter and JAMMA provides the required +5/+12 on the connector. Only way the 90412 seems useful is if you had an AC transformer assembly from the original cabinet, got rid of your JAMMA harness, and recreated the exact wiring like you'd find in a dedicated cabinet.
So basically it comes down to original transformer and wiring map or JAMMA with audio hum.
- Yes there's some risk of noise/hum if you're not installing this in the original cabinet with original wiring. The MCR design has problems so this is an open-ended topic.
Well, there does seem to be some disagreement on whether it is possible to avoid the hum altogether.
- Google found a pinout (
here) for your game. You'll be constructing a wiring harness with approximately 10 connections total among the JAMMA fingerboard, MCR PCB, audio amplifier, speakers, and monitor.
As I mentioned, those Crazy Kong pin-outs haven't helped. Even if I narrowed each pin down to the board connector, each pin in that connector is not labeled.
Hopefully your PCB is tested and working. It would be even more frustrating if you went through all this effort and the PCB were non-operational.
I am actually operating under the assumption that it is
not working. The other alternative is to toss the board set in the trash.
It could just be the light, but from your picture, I'd be leery of your interconnect cables. The one in the upper right looks damaged.
You might want to avoid some headaches by buying replacement ones (most people use short SCSI cables).
Yes, those 24-pin cables are toast. I wasn't able to find any cables on Ebay, so I'm still looking for those also.
Darren Harris
Staten Island, New York.