- Thread starter caius
- Start date
edwin128
Student
Hi @caius. Good work in creating these replacements for these failing konami customs.
I 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.
Cheers, Edwin.
I 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.
Cheers, Edwin.
Thanks.
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.
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.
edwin128
Student
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?
Yes. I will happy to buy one repro from you
.edwin128
Student
ok. What do you recommend to remove the coating?
edwin128
Student
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.
Both get very hot, so I'm gonna order some to replace them.
Cheers, Edwin.
edwin128
Student
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.
But,I really want to fix my pcb, I did not try to fixed before because of time constraints. I did some inquiry in the klov forums some time ago.
I don't have the experience to draw PCB layouts, I leave that work to the experts like you.
Cheers, Edwin.
rickbonano
Beginner
Hi! I would be interested to get a repro of that 054986A. I got a Metamorphic PCB and I would like to get it 100% working.
Actually the game plays blind, I get sound sounds a little glitchy) and no video.
So my questions are:
Where can I get a 054986A repro and how can I fix the video problem?
Thank you very much!
Actually the game plays blind, I get sound sounds a little glitchy) and no video.
So my questions are:
Where can I get a 054986A repro and how can I fix the video problem?
Thank you very much!
First of all the video problem is not caused by the '054986A', there is no relation.Most likely you have some trouble in RGB output, probably one or more RGB DAC are faulty.
As for '054986A' since you are in Canada contact @Mitsurugi-w
As for '054986A' since you are in Canada contact @Mitsurugi-w
rickbonano
Beginner
Tahnks for the reply! Yeah I know there are no connection bwtween the 054986A and the video but I wonder if there is some hope to get the video back to life.
My knoledge in pcb is at level 1 so if you have some hints taht would be awesome!
Best regards
My knoledge in pcb is at level 1 so if you have some hints taht would be awesome!
Best regards
Here is the official video
edwin128
Student
hi Caius. Thx for the update. I see the two ram palettes and the two chips from the below the custom in your reproduction.
are the long components in your reproduction resistors? did you get them from somewhere in the pcb?
do you need to provide new ram palettes for the reproduction? because i think that is the reason the custom fails.
could you elaborate more in the steps?
cheers, edwin.
