Axunworks JAMMA Extractor + Police 911 2: No gun?

joseph3000

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I'm wondering if anyone might be able to explain or have any ideas on a problem I'm having. I bought an Axunworks JAMMA Extractor to try and capture video from my Police 911 2 machine. The JAMMA Extractor seemingly works, in that I am able to feed video into an OSSC and capture card. However, while the gun trigger works to flash the screen, shots no longer register. When the Extractor is removed, the gun works again as normal. Clearly, when the Extractor is in the chain, the light sensor of the gun no longer functions properly. According to the schematic, only the gun trigger (which works) runs through the JAMMA connector. The light sensor goes through the additional USO connector and remains unchanged in either configuration. It would seem maybe the video signal being output to the monitor is being altered? That's my only guess based on my limited knowledge. Any thoughts/suggestions would be greatly appreciated!

JAMMA Extractor + Police 911 (1).jpegJAMMA Extractor + Police 911 (2).jpeg
 
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I've never looked at that device before... does it noticeably affect the video at all? Have you tried turning up the brightness a bit to see if that helps?

If you use an ohmmeter, do the video signals connect straight from JAMMA In to JAMMA Out, or do they go through some chips along the way? (i.e. is it just tapping off the signal to extract, or is it taking in the signal and regenerating the output signal?)

Gun games are sensitive to signal timing and brightness in particular, so my guess is that something on this board is affecting one or both of those.

DogP
 
It doesn't appear to alter the video at all, but I had read on some threads about people complaining that older versions did affect brightness. Maybe I'll play with that first. I am somewhat familiar with the tight timing requirements, which is what I suspected might be happening but couldn't be totally sure. I will poke around with a multimeter and see what I can find.
 
So I took video with my phone to compare more easily, and there is a slight drop in brightness with the Extractor. I increased the brightness of the monitor until a shot registered, and it required recalibration. However, even after calibration, the gun remained inaccurate vertically and wouldn't register on about the lower 3rd of the screen. If I read the right pins, there was some resistance along the video signal path. I guess this thing is a bust??
 
If you turn the brightness up even more (i.e. too bright), does it get any more accurate? And if you have another gun, you could try that... sometimes one gun is a bit more sensitive than another.

DogP
 
It's kind of hard to answer that question, but I guess I would say yes, it does get more accurate. However, with the Extractor installed, and after calibration, the gun may be accurate around the center box, but loses accuracy in the vertical direction (it shoots higher than where aimed), and there ends up being dead zones in the left 1/4th of the screen, and lower 1/4th-1/3rd.
 
When you're turning up the brightness, are you using the RGB knob on the Axunworks PCB?

For what it's worth. I couldn't even get my OSSC to display my JAMMA game properly on my Axunworks JAMMA extractor. I switched to the Splitfire and it worked perfectly with everything I've thrown at it so far.

Del
 
I'm using the monitor controls for brightness. I was under the impression that (both of) the RGB pots on the Extractor controlled output through the SCART and other outputs, not to the monitor. I did have to adjust that for the SCART to my OSSC/capture card, it was super dark at first.

I did have to fiddle a ton with the OSSC settings just to center the image and scale it right, as well as some color correction. I'm not even sure of what I was doing honestly or if it's right. Maybe I will look into the Splitfire...
 
I'm using the monitor controls for brightness. I was under the impression that (both of) the RGB pots on the Extractor controlled output through the SCART and other outputs, not to the monitor. I did have to adjust that for the SCART to my OSSC/capture card, it was super dark at first.

I did have to fiddle a ton with the OSSC settings just to center the image and scale it right, as well as some color correction. I'm not even sure of what I was doing honestly or if it's right. Maybe I will look into the Splitfire...
I think you're right. It's been a while.
 
When you're turning up the brightness, are you using the RGB knob on the Axunworks PCB?

For what it's worth. I couldn't even get my OSSC to display my JAMMA game properly on my Axunworks JAMMA extractor. I switched to the Splitfire and it worked perfectly with everything I've thrown at it so far.

Del
Just received a Splitfire. I don't have a VGA cable yet to test capture, but not only does my gun still shoot with it installed, it shoots more accurately and over the whole screen. :oops2:
 
When you're turning up the brightness, are you using the RGB knob on the Axunworks PCB?

For what it's worth. I couldn't even get my OSSC to display my JAMMA game properly on my Axunworks JAMMA extractor. I switched to the Splitfire and it worked perfectly with everything I've thrown at it so far.

Del
So now with the Splitfire, I can't get the OSSC to sync. I am using a VGA cable into AV3, and on a couple of the modes for that input it just shows a bunch of different sync frequencies that keep changing. Any suggestions?
 
So now with the Splitfire, I can't get the OSSC to sync. I am using a VGA cable into AV3, and on a couple of the modes for that input it just shows a bunch of different sync frequencies that keep changing. Any suggestions?
For my OSSC (I have the remote) I turn it on and press 6 on the remote (RGB S). I'm using a VGA cable and 1/8 audio jack into Input 3. Can't recall which input it is at the moment, but it is for sure 6 on the remote. Display says 262p 15.62kHZ @59.63Hz. I'm running a JAMMA Ghouls and Ghosts PCB.

OSSC Output is HDMI into my Elgato Camlink Pro capture card:

[Edit: Got some pics for you with my settings.]
Del
 

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Thanks, Del. I messed with the OSSC a lot yesterday...I can't get any signal on RGBS. Just for comparison, I tried the Extractor again, only this time using the VGA cable, and it worked immediately on RGBS (so it's not the cable, at least). I tried to change the sync parameters on the RGsB input, which seemed to be getting some sort of scrambled sync signal, as it would display flickering numbers. I managed to stabilize the numbers somewhat, with only the decimal values flickering, but nothing steady enough to display to the capture card/computer. However, I DID see a video signal for a brief moment on my computer just once during all of this. Also, I did try adjusting the video pot on the the Splitfire, which did help to get more stable numbers. Not sure where to go from here. :(
 
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