Popeye JAMMA power question

Just want to ensure it is grounded like this for Jamma. If pin 27 goes to an input, depending on how the super gun handles it, it can cause issues, routing that to video ground. I am not sure if this is your issue, but I have seen boot issues, color issues, etc with using chamma with jamma. Just good to verify.

With nothing plugged into the supergun, pins 27 and 28 should both be ground. I assumed this is handled with the dips.

1750942975956.png
 
Ok sorry I'm a little lost and confused now. Am I leaving the supergun off, placing both probes of the multimeter on pins 27 and 28 on the supergun, or should I be testing both the pins on the JAMMA converter as well? When I do test, am I looking for the multimeter to give me a response of 0.00?
 
Ok sorry I'm a little lost and confused now. Am I leaving the supergun off, placing both probes of the multimeter on pins 27 and 28 on the supergun, or should I be testing both the pins on the JAMMA converter as well? When I do test, am I looking for the multimeter to give me a response of 0.00?

The above image is showing that when you connect a board to test the super gun, it will link pins 27 and 28 together. We want to make sure that the super gun is set for JAMMA standard and doesn't have pin 27 goin to an input rather than the ground.

So nothing plugged in, there should be continuity between pins 27 and 28. This is what I would establish first as it should be a quick 2 second test, and then move on to the SCART cable to verify defects/issues.
 
I got myself a better multimeter that beeps properly for testing. Between 27 and 28 I'm getting no continuity. When I test pin 28 and the ground, I get a beep. When I test pins 27 and the ground, I get no beeping.
 

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Just want to ensure it is grounded like this for Jamma. If pin 27 goes to an input, depending on how the super gun handles it, it can cause issues, routing that to video ground. I am not sure if this is your issue, but I have seen boot issues, color issues, etc with using chamma with jamma. Just good to verify.

With nothing plugged into the supergun, pins 27 and 28 should both be ground. I assumed this is handled with the dips.

View attachment 829187
Both pins 27 and 28 between the supergun and JAMMA converter are beeping properly as well.
 
I just did some more testing. When the JAMMA converter is plugged in, pin 27 and fhe ground DO make a proper beep. It's just when the adapter is removed thay they don't.
 
Both pins 27 and 28 between the supergun and JAMMA converter are beeping properly as well.
I believe this confirms chamma. When you hook up the board, it runs 27 to ground which can cause issues. Play with that dip and see if you can get pins 27 and 28 to beep. Try different configurations, board not plugged in.
 
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I have no idea what the dips on this do, but I'm not seeing any change. If the JAMMA adapter isn't plugged in, pins 27 and 28 don't beep together, and 27 doesn't go to the ground. When the adapter is plugged in, 27 and 28 do beep, and 27 goes to the ground.

I'm unable to find a way to get 27 to not go to the ground with the adapter plugged in.
 
I'm testing these two by themselves without anything else plugged in. If I should attach the SCART cable or power supply to this as well during my tests for better results, let me know.
 

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I have no idea what the dips on this do, but I'm not seeing any change. If the JAMMA adapter isn't plugged in, pins 27 and 28 don't beep together, and 27 doesn't go to the ground. When the adapter is plugged in, 27 and 28 do beep, and 27 goes to the ground.

I'm unable to find a way to get 27 to not go to the ground with the adapter plugged in.
pinout, posted above. Button 6, pin 27, is a button input instead of ground, which is what you do not want.

I see that the maker of this is on shootem up forums but also, from what I can tell, runs http://www.arcadeforge.de/

Going back to the color problem, I haven't messed with the RGB controls before, but looking at it, the orange part looks like a key. Can you pull it out to adjust individual pots? Maybe with messing with it you turn just one of them.
IMG_2774.jpeg
 
What's this about a button 6? I don't remember hearing about that, or where it's located.

The orange key on my supergun does indeed pull out, but it doesn't fix my color issues. Everything still that strange yellow tint.
 
What's this about a button 6? I don't remember hearing about that, or where it's located.

The orange key on my supergun does indeed pull out, but it doesn't fix my color issues. Everything still that strange yellow tint.
This has been the issue I first brought up a week or so ago. CHAMMA has 6 buttons wired instead of 3 for standard jamma. Plugging in a standard jamma into a CHAMMA setup wired as input to ground which may interfered with the shared video ground. If you look at the images, you can see pin 27 going to button 6.
 
I'm really sorry, I'm trying so hard to understand this but it's a lot for me. I do remember now button 6 being brought up early on, but I got completely sidetracked by my video issues and wasn't able to look much into it then.

I can't seem to locate the 6 buttons, unless they're not actual buttons and I should be looking for something different. Do you mean look at my images to see pin 27 going to button 6? If so, I can't spot anything myself besides the "C6" on the JAMMA adapter.

Sorry if I look like a complete idiot right now. I've never heard about CHAMMA until this thread so it's something I'm still trying to fully get a grasp with how it works, especially with my setup.
 
I'm really sorry, I'm trying so hard to understand this but it's a lot for me. I do remember now button 6 being brought up early on, but I got completely sidetracked by my video issues and wasn't able to look much into it then.

I can't seem to locate the 6 buttons, unless they're not actual buttons and I should be looking for something different. Do you mean look at my images to see pin 27 going to button 6? If so, I can't spot anything myself besides the "C6" on the JAMMA adapter.

Sorry if I look like a complete idiot right now. I've never heard about CHAMMA until this thread so it's something I'm still trying to fully get a grasp with how it works, especially with my setup.
No worries :)
If you look at the images, I highlighted the pins. P1_B1,2,3 are labeled, but if you look at 25,26,27, that is buttons 4-6. Chamma uses this so that a kick harness is not needed. JAMMA doesn't use pin 25 and 26, so not problem, but for JAMMA standard, pin 27 is a ground. This may cause issues with certain pcbs as it maps an input to buttons. This might not be your issue, but pin 27 not being ground shows that it is set that way. I am not entirely sure of this supergun, so reaching out to the maker is a good option.

That said, that key and three pots are for the Red, Green, and Blue channels. They should be able to be adjusted independently of each other, helping dialing in the color.
IMG_2785.jpeg
 
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OHHHHH I see. So 22-27 are the 6 pins, and I need to find out how to make the 6th pin (27) not go to my ground?
 
On 27 to ground? So I do want 27 to be grounded? Sorry I'm still exhausted ahd lost with everything exactly....
 
I'm at a loss. I can't seem to get any of the settings changed to fix the issue. I can also confirm now that the dip switches don't help my case at all, as the game still gives me that deep blue tint no matter how they're set. I have no idea what they're used for.

The color pot doesn't help me either. I pulled it out to each slot, turned it back and forth, but the colors still stayed the same aside from certain ones being a little stronger as I pulled the pin out.
 
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