Namco System 12 board won't boot

musicman282

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I just purchased a Ehrgeiz machine and the board continuously resets. Does anyone know how to troubleshoot this? I have good voltage on the board and I played with raising and lowering it to see if it would make the board boot and it does nothing. Does anyone have access to the schematics? I can't find anything. All help will be appreciated.

If the battery is dead on the board, will it not boot?
 
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Anyone? I checked the battery and it is good. I pulled my scope out and this thing continuously resets. Does anyone have the schematics?
 
Reseat the 2 daughter cards... Outside of that the common problems I've seen on them would be cracked solder joints on the top board surface mount chips and blown filters on the inputs. Blown filters shouldn't cause it to reset, but the screwed up solder joints would.
 
I had a surface mount diode cause this on one of mine. That board is the same as Soul Calibur, Tekken2 and tekken 3 board also look for schmetatics for those games should be asier to find than the Final Fantasy players board you have.
 
I got a Tekken Tag board where some of the inputs are stuck closed. is that the "blown filters on the inputs" thing you speak of?
 
I had a surface mount diode cause this on one of mine. That board is the same as Soul Calibur, Tekken2 and tekken 3 board also look for schmetatics for those games should be asier to find than the Final Fantasy players board you have.

Tekken 2 is system 11 actually. Just for accuracy's sake.
 
Thanks for the help. Ive already tried reseating the cards and examined the board with a magnifying glass to look for broken traces. I didn't see any bad solder joints. I'm going to resolder the pond on both daughtercard connectors tonight and see if that makes a difference.
 
I had a surface mount diode cause this on one of mine. That board is the same as Soul Calibur, Tekken2 and tekken 3 board also look for schmetatics for those games should be asier to find than the Final Fantasy players board you have.

Do you have the system 12 schematics? I've been searching for days.
 
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