SNK Neo Geo NEO-MVH six slot board repair

Just finished the arduous task of replacing all the capacitors on the board out of my office’s SNK Neo Geo MVS-6-25 cabinet. It’s a monster, roughly 16″x20″ and two boards stacked one on top of another. The top board is identified as NEO-MVH SLOT6, while the bottom is labeled with NEO-MVH MV6.

This monster board has a monster cap list, with a total of 39 capacitors required to totally fill it out. Thankfully they’re all labeled on board with which values go where (though voltages are NOT labeled so keep track!) The condensed list of everything I had to order is as follows:

3x  1.0μF  50v
12x 4.7μF  25v
2x  4.7μF  50v
1x  10μF   16v
3x  22μF   16v
1x  22μF   50v
1x  47μF   16v
5x  100μF  50v
2x  220μF  16v
1x  220μF  35v
6x  470μF  16v
2x  1000μF 16v

I didn’t follow my advice and failed to note what exact voltages went where, but kinda felt it out based on the quantities and locations… Risky, but it worked. I fired the board up to test and the newly potent audio circuits startled the hell out of me since I’d left the volume slider at close to maximum from its previous weakened state.

While working it over I noticed that a few caps have incorrect labels screened on the board. In particular there’s a pair of 4.7μF caps with 4.7K screened at their position as though they were resistors.

Also ran a set of leads from the old battery location so I can locate a new rechargeable battery offboard once I source one.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>