And here is the schematic that I traced. Because tiny SMD is a pain and traces run under components, etc, I wound up verifying essentially every connection by checking continuity with a multimeter. I tested the small capacitor values in-circuit with one of those 328A component testers - this yielded plausible values except for the cap in the feedback loop.
Perhaps unsurprisingly, the overdrive circuit turns out to be essentially a tube screamer with a couple of minor changes. The internal B50K trimpot is the tone control - the pedal manual tells you to adjust it for more treble/more gain or less/less to taste. I checked multiple times and one end of the trimpot appears to be unconnected, unlike a TS.
Anyway, I expected the power/charging to be the more innovative part of the pedal. It uses a 3.7V Li-ion battery and a MAX1044 charge pump to produce a supply voltage of 5.8V - double 3.7 less two diode drops. I measured Vb to be 2.2V (not sure why it's not half of 5.8V).
The switch is a DPDT, presumably for size, and it achieves true bypass + LED switching with something that looks like a descendent of the Millenium bypass, using two transistors.
The battery circuit has an IC that I assume is designed for battery charging labeled "LCLG 09," something that must be a regulator, and a bicolor LED.
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