Thanks.Hi @caius. Good work in creating these replacements for these failing konami customs.
Well, the Konami '007593' (ad the similar '007327') is on my TO-DO list.It should be pretty easy to reproduce, the chip contains two palette RAMs and all the needed circuit for the digital to analog conversion.But first I have to source a PCB that carries this custom, I don't have any.Anyway, I will post update on this forums.don't know if here is the right place to ask. But, ... do you think it's possible to create a replacement for the konami 007593. I think this chip controls the palette color and it seems prone to failure.
I have a contra pcb that fails to boot and reports a 1f chip (the 7593), and usually gets quite hot.
I would definitely would buy a replacement for that chip
Just to see if I understand. Does this custom contains only the two palette rams or additional component? does replacing the rams will be a good fix?Well, the Konami '007593' (ad the similar '007327') is on my TO-DO list.It should be pretty easy to reproduce, the chip contains two palette RAMs and all the needed circuit for the digital to analog conversion.But first I have to source a PCB that carries this custom, I don't have any.Anyway, I will post update on this forums.don't know if here is the right place to ask. But, ... do you think it's possible to create a replacement for the konami 007593. I think this chip controls the palette color and it seems prone to failure.
I have a contra pcb that fails to boot and reports a 1f chip (the 7593), and usually gets quite hot.
I would definitely would buy a replacement for that chip
P.S.
It seems I have two faulty CIty Bomber PCB that carry this custom so I may think to use one for my repro development.
ok. What do you recommend to remove the coating?As said, the custom contain for sure palette RAMs and most likely the circuit for digital to analog conversion but I will be able to say more once removed the coating.
Hello. I removed the epoxy coating with a paint stripper. I found two ram chips sony 6h57 cxk5816m-12l like this one: https://www.ebay.com/p/Sony-Cxk5816m-12l-Rqans2-CXK5816M12L/1818380873?_trksid=p2047675.l2644.ok. What do you recommend to remove the coating?As said, the custom contain for sure palette RAMs and most likely the circuit for digital to analog conversion but I will be able to say more once removed the coating.
Hello. I think that your work is extremely valuable for the preservation of these pcbs. If one is available, I will buy one from you.Didn't want a replacement from me?
OK, then my work is uselese now, you can do it by yourself.Draw schematics and route them to a PCB layout.
hi Caius. Thx for the update. I see the two ram palettes and the two chips from the below the custom in your reproduction.@edwin128
Since you asked me this some time ago, this is just to let you know I successfully reproduced the Konami '007593' custom, I tested it in a City Bomber and Vulcan Venture PCBs.I attach picture of my reproduction and original custom.