Sunset Riders PCB audio issue

LordAuric

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I recently snagged a Sunset Riders PCB and quickly ran into an audio issue (bad crackling and very very low audio... or none at all). Upon inspection, it appears according to the wiring diagram in the Sunset Riders manual that audio is not included on the JAMMA pinout. If it's JAMMA how can that be?

http://pdf.textfiles.com/manuals/ARCADE/S-Z/Sunset Riders [Instructions] [English].pdf (Page 9)

The board has a 4-pin audio out line separate from the JAMMA. Is that what there are expecting me to us instead? Never ran into a JAMMA board that didn't include audio so I admit I'm confused.

Yelp!
 
it did not say it in the pinout in that manual but sometimes 10 is one speaker + and J is the other + and then you goto dc ground from the speakers. if you get some odd audio like you said perhaps thats it.
 
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