Jr pacman conversion pcb - no audio?

archetypearcade

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Hello!

I have a jr pacman in a super pacman using the conversion pcb and filter board, direct wired to a switcher power supply. Everything works fine except there is no audio. Tested continuity from pcb to speaker and that is fine, but no matter how much you adjust the volume pot there is still Nothing.

What's next step?

Thanks!
 

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A common test is to put your finger on the amp input legs and see if it amplifies the "noise" created.
 
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