Problem MVS 4 Slot

[jerryspaghetti]

Got a couple of issues with a four slot.

Slots 1 and 2 working well but certain channels of the audio are distorting. Maybe a recap on the audio circuit needed? See video link

Slots 3 and 4 have a graphical glitch. Seems to be sprite issue with text etc. ok in game. There’s a horizontal tearing effect, see attached photos

 

[Ace`]

Bad custom surface mount customs on the top board, usually NEO-G0 from memory. Furrtek does sell repros or you can make your own as he released the gerbers.

 

[jerryspaghetti]

Bad custom surface mount customs on the top board, usually NEO-G0 from memory. Furrtek does sell repros or you can make your own as he released the gerbers.

Is that the graphics issue or both issues?

 

[Ace`]

Most likely both unless you've got bad traces.

 

[jerryspaghetti]

Most likely both unless you've got bad traces.

Thanks man. This might be beyond my abilities.

Anyone out here look at MVS boards?

 

[Max...]

Had issues with my 4 slot too but (for the moment) given it up TBH. Bought a couple of 2 slots instead for a great price - I slightly miss the 4 slottyness but they are much simpler single PCBs to work on. Might be of possible use:

Neo Geo MVS 4 slot problems - sound, capacitors, Chinese bootlegs etc

In my 4 slot it was very randomly losing ALL sound, when switching game - this was only fixed by a hard reset. I now think this is specifically triggered when switching to a pretty new AliX boot (Money Puzzle exchanger). So I went through the morning (using only genuine carts) and...

www.ukvac.com

 

[jerryspaghetti]

I actually have 3x 4 slots with various issues and a 4x 1 slots with various issues.

If there's a pcb maestro out there that can get me one working 4 slot out of the lot, they're welcome to the whole stash in payment!

PM me superman!

 

[Max...]

Yeah, hence the request for Heber on that other topic to produce a Neo Geo MvS + modern MOBO. 😉