SNK Neo Geo MVS Multicart Improvements (138 in 1)

This video covers some improvements made to an MVS multicart in order to resolve PCM sound issues on a couple of MV-1FZ MVS systems. The problem seems to be common to the 120 in 1, 138 in 1 and possibly other carts. Often these carts are poorly manufactured and lack bypass caps and voltage regulator etc.

The end result is both of my 138 in 1 carts are now much much better with many previously dodgy sounding games all sounding 100%. These fixes apply to the 120 in 1 as well.

EDIT 13/02/2015 - I've fixed the problem totally today!!! It was 95% better after the work done in this video, but now its 100%

Final fixes here which also apply to the 120 in 1, and 161 in 1:-
   • SNK Neo Geo MVS Fixing Multicart PCM ...