PMMI Musical Horn manual

[neontwister]

I know this was 20 years ago. Anyone find a schematic? I got two brain boxes on my bench now. All I can do is test and replace components. I have an LX and tested the new style box. That is the problem. I like to buy an old and new style controller and test them. The old style box I feel is good. I can't find anything wrong component wise. Good news is I sourced all the components.