Jamma 60-1 video?

thewizard

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I'm not sure where to start this thread so hopefully someone can steer me in the right direction. I have a Jamma 60-1 Video game and just the past few days when I turn it on the boot up screen is super large.. When the game selection comes up everything is atleast 2x larger than normal.. If I let the game sit for a few minutes shut it off and turn it back on the Video size is back to normal... Help!!! Where do i start?


Thanks!!!
 
Sounds like a monitor problem. The bad caps are out of spec and when they warm up from being on they creep closer to spec.

Test the board in another cab or test another game in this one to verify.
 
Thanks for the quick response!! I dont have access to another cabinet so I'll have to do it the hard way.. Do you have any suggestions on where to buy a another Jamma 60-1 board to try the board option in the same cabinet..

Thanks!!
 
Nics in the Buy/Sell forum. If you know any locals who have arcade machines ask them if you can borrow a jamma board for 10 minutes. Entice them to come over with beer and bring the board with them.
 
I have a cheap jamma board (champion baseball) that i would sell if you are looking for a test board.
 
Sounds like a great idea.. Have Labatts Blue on tap here in Buffalo!
 
Cant you hook it up to a standard pc monitor? The model I have can. At least you can verify that the right signal is coming out.
 
Cant you hook it up to a standard pc monitor? The model I have can. At least you can verify that the right signal is coming out.

That would just verify the VGA signal is good, not that the CGA signal is good.

but I agree he should look at the monitor. Don't normally see blooming on a raster monitor, but it could happen...
 
Disconnected the vga cable and hooked 2 different PC monitors (CRT style) to the card Both monitors didnt display anything... I could hear the sound coming from the arcade but no display on either monitor... What should I try next?

Thanks!!!
 
What to try next is to actually enable the VGA output of the 60-in-1 by flipping DIP switch 2 to the ON position. You're not getting any video out of the VGA output because the board is set to output 15KHz RGB out of the JAMMA connector(DIP switch 2 OFF). First flip that DIP switch and then try the board on your CRT monitors again.
 
Before we go any further, which version of the 60-in-1 do you have? The older models with the big socketed FPGA(?) and socketed EPROM, the later model with a soldered FPGA(with or without the plastic cover) and socketed EPROM or the newest reduced-size 60-in-1s with 2 soldered Flash ROMs? I think the older boards are more prone to failures than the newer ones.

Tell me which of these pictures look closest to your 60-in-1:

Oldest revision with socketed FPGA(?) and socketed EPROM: http://in2amusements.com.au/images/products/preview/jamma 60 in 1 pcb.jpg

Later revision with soldered FPGA, socketed EPROM and plastic cover: http://www.8linesupply.com/mm5/graphics/00000001/classic-arcade-games-board.jpg

Newest revision with smaller PCB and 2 soldered Flash ROMs: http://img.alibaba.com/wsphoto/3360...oard-for-arcade-game-machine-game-machine.jpg

I believe the older revisions are more prone to problems like what you're having.

OFF-TOPIC: I see 60-in-1s with different ARM CPUs. Some(like mine) use an Intel PXA255 ARM CPU while others use a different ARM CPU which I have no idea what it is. What other ARM CPU can the 60-in-1 have(I typically see this other ARM CPU on 60-in-1s with the soldered FPGA, socketed EPROM and no plastic cover)?
 
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yup shut machine off.. disconnected cable from jamma card.. connected vga cable from monitor to jamma card.. turned back on.. nothing.. did same steps but changed dip switch settings
 
If you still don't get VGA after setting DIP switch 2 ON before powering up the 60-in-1, yours has a defective VGA output. Either that or your monitors have problems with 640x480 resolution(640x480 is the resolution of the 60-in-1's VGA output), which I highly doubt. If your 60-in-1 has a plastic cover on it, odds are it's defective. Seems those ones have a lot of defects, the biggest being faulty trackball connectors.

If your board will outright refuse to output VGA, you might wanna get one of the smaller 60-in-1s. Mine works very well in VGA, the line out for powered computer speakers works fine(albeit distorted with certain games, as expected, though not as bad as I've heard it on some of the older 60-in-1s. In fact, to me, Gyruss is NOT the game with the worst distortion on my 60-in-1. I find 1943 sounds even worse than Gyruss) and both trackball connectors are fully functional.
 
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Some of the PC monitors with a "sleep mode" (where they hibernate when they don't detect a signal) have a problem detecting the signal from these boards, too. Some detect the board and some don't...
 
tested with 2 monitor.. One was in sleep mode and would not come out.. The other did nothing... I have access to a few more monitors to use to test.. Will try that today.. I think i'm gonna buy another 60-1 anyone have a suggestion on where to buy a good one from?
 
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