MV1ACH not working on OSSC

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Arcade-Projects
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MV1ACH not working on OSSC

Post by Arcade-Projects »

So I purchased a MVS MV1ACH from AliExpress as I wanted a front loaded NeoGeo for my multi-JAMMA arcade.
The device does not seem to like my OSSC routed through Franks Minigun.

A brief check with my analogue oscilloscope showed values quite similar to my working MV1C so I tested it on my B&O CRT TV where it works flawlessly.
Any idea what causes the board to not cooperate with the OSSC?

Added pictures of the boards. Quite obvious that someone messed with the caps and the backup battery is a bit sad, but seems OK overall.

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