MVS Neo-Geo 6 Slot PCB Boardset Repair #1

darthi8nt

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Symptoms: 1) Game would start fine then sound would become scratchy and humming.
2) Battery would lose settings not keeping charge.


Repair:1) Repaced 8 faulty caps in audio section of bottom boardset.Four 100uf16v caps
and four 220uf16v caps were repaced.These were checked using ESR meter.
2) Repaced the dead rechargable battery with a watch type battery on the bottom
side of boardset making for easy changing of battery in future. Desoldered the
charging resistor to do the mod which is a 470 ohm resistor next to battery.
3) Cleaned cart pins and edge connectors.

Tested for an hour playing multiple games of Puzzle Bobble, Mark of Garu, Samarai Showdown, Magical Drop III, and Windjammers with no more sound issues whatsoever. High scores are also now being saved again.
 
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Nice fix!

I just replace all but a couple or 3 caps in there with one of my kits. The caps that SNK used really sucked bad - especially the TK ones.
 
Ya I bought one of your kits for a MVS1 I have still to fix and some ram from you. Your kits are great. Nice Job on those kits.
 
Ya I bought one of your kits for a MVS1 I have still to fix and some ram from you. Your kits are great. Nice Job on those kits.

Thanks! I appreciate the kind words :D

Those kits have helped resurrect many Neo Geos around the world which makes me happy. I love hearing how folks use the parts I sell to keep old systems going - computers, game consoles, arcade games, and more.

One if my favorites is the Bender Beer Brewer Project where the guy built a replica of Bender the robot from Futurama. He fried the ICs accidentally by hooking up the wrong PS and ordered a few from me to complete his project. It's a really cool project. :D
 
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When mounting the battery to the bottom side of the PCB board keep the negative leg of the CRC battery holder in the desoldered hole of the neg battery hole on the pcb. Next, use the desoldered hole of the 470 ohm resistor (note: you need to remove the resistor to cut the charging circuit) closest to the battery on the pcb board this is where the positive leg of the new battery holder will go.

Here is a link to a great tutorial on how to do this mod.
http://www.jamma-nation-x.com/jammax/tutorials.html
 
Mounting the battery holder upside-down is just genius. So if that battery pops, the juices will ruin the 30-cent battery holder and then just drip harmlessly off the holder into the cabinet. I love it!
 
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