Why is my Pang3 C-Board modded like this?

PCB problems and fixes
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keropi
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Why is my Pang3 C-Board modded like this?

Post by keropi » January 26th, 2019, 1:49 pm

Hiya!

I recently got a working PANG3 CPS-1 board, A-board is a 12mhz one that looks fine with no weirdness going on, B-board is the expected Mitchel one but C-Board looks like this:

Image

Image

I don't know much about CPS-1 but this looks like a C-Board from another game modded so that it has no battery? Some legs of PPU2 are modded and there is a cut on the top side.
Most likely this C-board is from another game but what's the deal? Anyone knows?

Thanks! 8-)

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keropi
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Re: Why is my Pang3 C-Board modded like this?

Post by keropi » January 26th, 2019, 2:08 pm

gonna answer my question most likely, I found this page: https://www.arcadefraidi.com/repairs/th ... s1-capcom/
and it seems this is the mod so that you can run decrypted roms. On the B-Board the 2 roms on positions 1 and 7 where soldered masked roms, rom on position11 was soldered on the board as well but the rest were socketed (5,6,16 and 17)
So it seems either someone did the mod and burned decrypted eproms (couldn't find anything on pang3) or most likely the C-board is not the original one that came with the game and was modded so it could work.

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nem
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Re: Why is my Pang3 C-Board modded like this?

Post by nem » January 26th, 2019, 3:50 pm

It looks like the mod to run decrypted games.

However, Pang doesn't need one, so the C board has been borrowed from some other board.

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keropi
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Re: Why is my Pang3 C-Board modded like this?

Post by keropi » January 26th, 2019, 4:23 pm

Thanks for the confirmation. Since it works and it was in great condition with an awesome price I can't complain :)

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leonardoliveira
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Re: Why is my Pang3 C-Board modded like this?

Post by leonardoliveira » January 29th, 2019, 2:49 pm

That mod is not to run decrypted games. It's to make the B-21 chip operate on battery-less mode (As a B-01 chip)

It just happens that modified games target B-01 PPU because that's what a B-21 works as when in battery-less mode.

I believe PANG originally uses B-17 PPU so your board has patched P ROMS.
Image

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