I've got a bum board.
Few questions for those who can help.
Are those really a series of 16 pin optocouplers there? The NEC 2501. They are all rusted off the board.
Also what's that 8 pin chip by A-1 on the motherboard? I can't see past all the oxidation on my board.
My first time on a Sega 16 board.
Golden Axe PCB
- Sunder
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- Rossyra
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Re: Golden Axe PCB
It sounds rough anyway but has it been desuicided?
- Sunder
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Re: Golden Axe PCB
Nope, does not look like it.
I'll take some proper clear photos and log my progress through it very soon.
I'll take some proper clear photos and log my progress through it very soon.
- Sunder
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Re: Golden Axe PCB
The FD1094 is corroded to hell anyway. It's like getting shot and run over by a truck right after. Haha.Rossyra wrote:It sounds rough anyway but has it been desuicided?
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Re: Golden Axe PCB
The only component with 8 pins I can see in A1 area of a 16B mobo is a small Fujitsu MB3771 : http://www.alldatasheet.fr/datasheet-pd ... B3771.html
- Sunder
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Re: Golden Axe PCB
Thanks, mate. It helps a ton!Layer wrote:The only component with 8 pins I can see in A1 area of a 16B mobo is a small Fujitsu MB3771 : http://www.alldatasheet.fr/datasheet-pd ... B3771.html
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Re: Golden Axe PCB
Are you talking about Nec PS2501-4 used for the input buttons ? You can replace them with 16 pins Sharp PC817 too.
- Sunder
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Re: Golden Axe PCB
Thanks Layer.
I got the components on their way now. I'll make an update soon as I start the thing. Let me know if you guys spot anything I'm doing wrong.
Also I hear it's possible to just forgo the suicide chip and not have it on there at all?
I got the components on their way now. I'll make an update soon as I start the thing. Let me know if you guys spot anything I'm doing wrong.
Also I hear it's possible to just forgo the suicide chip and not have it on there at all?
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Re: Golden Axe PCB
Yes, it is.
Depending of your game revision, you will have to replace the crypted FD block CPU with 68K CPU @ 10 MHz (in the case of a crypted main CPU) or with Z80 CPU @ 6 MHz (in the case of a crypted sound CPU) + the decrypted romset (program roms or sound roms) matching your game revision to burn and install too (you can find and grab the decrypted romset @ jammarcade.net).
Depending of your game revision, you will have to replace the crypted FD block CPU with 68K CPU @ 10 MHz (in the case of a crypted main CPU) or with Z80 CPU @ 6 MHz (in the case of a crypted sound CPU) + the decrypted romset (program roms or sound roms) matching your game revision to burn and install too (you can find and grab the decrypted romset @ jammarcade.net).