Since I received some interest in the Regulator replacement board I made, I decided to spend a couple hours and put together the schematic for the Audio AMP PCB – VUE-AMP-01

https://easyeda.com/Alterac/virtualboy-audio-pcb-replacement

Only a couple things outstanding on this one, I cannot find an equivalent part for the EM1-3 Filters, the Audio IC is unknown so you will need to salvage that.

I will be making a new board to replace this and have modern components.

Very cool, thanks for taking the time to design it =D