Original US Contra sound wiring

Actarus

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Hi !
I just fixed graphic issues on my contra PCB ( thanks to Riptor and Shawn1976)
and when I test it in my jamma cabinet : no sounds..

I look at the original docs and see that the jamma connector on this board does not use the 10 and L pins for the mono sound.

I have to wire by the 4 pins JST connector :
1 left + 2 left - 3 right - 4 right+

my questions:
can I simply connect 1 and 4 pins to the 10 of my cabinet's jamma connector ,( 2 and 3 to the L of the jamma) to have a "mono" sound by my cabinet's amplifier ?

or do I need an external stereo amplifier with 2 speakers ?

Thanks for help,
Raphael
 
I would say no.
I always thought that the way they did the audio on that board was a little silly.
You have to make a harness for it.
If you need one made let me know
 
Last edited:
Hi Shawn,
unfortunately It's the answer I expected
If you have one for me It would be with pleasure !! ^^
 
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