Arcade Collecting > Miscellaneous Arcade Talk

NEO GEO MVS Sound Issues

(1/4) > >>

raventy:
Hey guys,
I was installing a Neo Geo MVS SLOT 1 board into my Mortal Kombat machine. Everything went fine except for the sound. Whenever the game is on, the speakers emit a ccuuussssshhhhhhhh kindove sound.(You know the sound that you hear when you turn your volume up really high with nothing playing). The game is still able to emit sound from them when played but ontop of its sound you have the ccuussshhhhhh sound thats ALWAYS on. Some MVS pin outs ive found said that it uses the standard JAMMA connector no modifications yet the MVS PIN OUT I found bellow shows the speakers are set up differently. Anyone have any idea?


I belive THIS: http://www.arcadedocs.com/vidmanuals/N/neogeo_mv1fz_manual.pdf is the board I have incase that helps at all. Maybe my board requires the speakers set up differently on the JAMMA? Also: I noticed that my power supply seems to be making the SAME noise that is coming out of the speakers!

D_Zoot:
If I recall,  the 1 slot boards were fully Jamma compliant, including the speaker wiring (single, mono speaker).   It was the multi-slot boards that used two speakers and required some modifications to a standard Jamma connector.


If the power supply is making noise, that's not usually good.  Has this board been checked in another cab?  Have you verified proper voltage at the edge connector?


D

BobA:
Since the NeoGeo pinout indicates Left and Right speakers try connection either one to the speaker and the other side to ground rather then using the L/R to a single mono speaker.  Just a small test that might help out.

BobA

tommy:
i think i had that problem a while back when i was into neo , i think i needed a better ground

raventy:
I hooked my Mortal Kombat board back into the machine and the issue goes away. I also disconnected the speakers and the PSU STILL makes the sound so it must not be speaker related. Does MK have something different setup on the JAMMA connector that im not seeing? Or different voltages somewhere? hhhmmm tommy- do u remember if ur PSU was making a sound at all? Also if so, how would I get a better ground to it?

Navigation

[0] Message Index

[#] Next page