Donkey Kong TKG4-14 board no analog sounds

Torance

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Donor 2016, 2023
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I've got everything else working on this board great. But, can't get any of the analog sounds - no coin sound, no boing boing when DK bends the girders, no walking sound.

Where to start? I've fixed digital sound before but don't know where the analog circuit is.
 
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Hmm. Nobody, huh? Maybe somebody can point me to the area on the board to start checking (via the schematic)?
 
I've got everything else working on this board great. But, can't get any of the analog sounds - no coin sound, no boing boing when DK bends the girders, no walking sound.

Where to start? I've fixed digital sound before but don't know where the analog circuit is.

All the stuff that's not digital is analog.

VR2 "mixes" the digital and analog sounds -- if you've got it skewed too far, it can muffle the analog.

It's unlikely that all of the analog sound circuits are bad, but it 6L or the 259s are bad, they won't get triggered.
You can manually trigger them by grounding the outputs of 6L.
 
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