Hi All,
I recently acquired a Net City cab and wanted to put my Naomi in there, but i don't think it has the original CRT?
As far as my research tells me the Net city should have a Tri sync 15/24/31 chasis, but mine does not appear to do 31khz, only 15/24 , as they are the only 2 frequencies listed on the pots on the board, (PCB Nanao 05A00675C2), Hitachi Tube, tube surround/mount claims Nanao MS9-29SU
It came wired for JAMMA (this was working fine with a pandoras box), but I have converted it back to JVS, this is where my issues start.
The monitor has no VGA in (there appear to be no empty connectors on the board for a VGA connector either), only a 15 pin AMP UP, with R - G - B - S - G, the JAMMA loom was hard wired to this , but I cut the cables and wired in a VGA breakout, thinking that I can set the Naomi for 15Khz and it should be fine through the standard VGA cable, I wired the VGA breakout as follows:
R-G-B to R-G-B,
All RGB grounds, sync ground and ground the AMP connectors Ground.
H/Csync to Sync on the AMP connector (I am lead to believe that VGA HSync is also Csysnc?)
I figured this should work, but I get a constantly horizontal rolling picture.
I have tried removing the grounds one by one but it make no difference, and tried adjusting the H Hold on the chasis, still rolls.
is it possible I need to combine the H and V sync together? Or perhaps i need some sort of sync cleaner or separator/combiner?
one thing i did find is that is i put it all back to how it was and use the capcom I/O I have, and the naomi set to 15Khzthe picture is absolutely fine! yes this is a solution, but its messy as i have tone of boxes and cables on the cab this way!
So if anyone has any ideas and can help that would be greatly appreciated.
I can post some pics if required.
Thanks,
Rave.
I recently acquired a Net City cab and wanted to put my Naomi in there, but i don't think it has the original CRT?
As far as my research tells me the Net city should have a Tri sync 15/24/31 chasis, but mine does not appear to do 31khz, only 15/24 , as they are the only 2 frequencies listed on the pots on the board, (PCB Nanao 05A00675C2), Hitachi Tube, tube surround/mount claims Nanao MS9-29SU
It came wired for JAMMA (this was working fine with a pandoras box), but I have converted it back to JVS, this is where my issues start.
The monitor has no VGA in (there appear to be no empty connectors on the board for a VGA connector either), only a 15 pin AMP UP, with R - G - B - S - G, the JAMMA loom was hard wired to this , but I cut the cables and wired in a VGA breakout, thinking that I can set the Naomi for 15Khz and it should be fine through the standard VGA cable, I wired the VGA breakout as follows:
R-G-B to R-G-B,
All RGB grounds, sync ground and ground the AMP connectors Ground.
H/Csync to Sync on the AMP connector (I am lead to believe that VGA HSync is also Csysnc?)
I figured this should work, but I get a constantly horizontal rolling picture.
I have tried removing the grounds one by one but it make no difference, and tried adjusting the H Hold on the chasis, still rolls.
is it possible I need to combine the H and V sync together? Or perhaps i need some sort of sync cleaner or separator/combiner?
one thing i did find is that is i put it all back to how it was and use the capcom I/O I have, and the naomi set to 15Khzthe picture is absolutely fine! yes this is a solution, but its messy as i have tone of boxes and cables on the cab this way!
So if anyone has any ideas and can help that would be greatly appreciated.
I can post some pics if required.
Thanks,
Rave.