EUREKA. I soldered in the 1N5395 diode and it worked. The unit is powered ON and all the buttons work, no problem. I jammed for a while on various settings and didn't notice anything weird, so I'm considering this a success.
P.S. The original BOSS AC-to-DC power transformer/adapter that came with my ME-30 produces DC out at 9.6V and 200mA, and I looked a bit more carefully at the Vf curve in the datasheet for the 1N5395 general purpose plastic rectifier diode I got as a replacement, and it turns out that at 200mA the Vf max = 0.8V, so it's only 0.25V higher voltage drop than the 0.55V on the original Schottky diodes. Should be fine since most of the electronics downstream should be able to handle 0.25V less voltage without too many issues. I'll post pics of the alternate diodes installed, if anybody is curious...
A big shout-out goes out to BOSS for actually publishing the service notes for their products. Helps us keep these babies running for a long time...
Last edited by HyeProfile; 22-01-2023 at 10:35 PM.
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