i built my DDRM v2 in 09/2019 (after 5 rev1. builds)
BOM
make sure you have an 6N139 instead of 6N138 in the output board or you run in an issue with stocking notes
Soldercore:
use no clean solder core, (do not use organic based flux based core)
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normal LEDs are as shown, when you look in your LED - you can see a long and short part inside.. that's not happen on our LEDs from the mouser BOM !! please check it
positive is the square pad on the PCB !!! m short leg is the flat end of the pcb silk (there's a circle with a flat end on the pcb printed)
Breakoutboard:
for the LED: the Mouser LEDs don't follow the standard pinout !!! - the long leg is negativ
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use hot water for no clean solder core, otherwise isoporopyl.
Powersuply Warning
don't mix the external PSU bricks or you destroy your Device.
The Kijimi use a 24V DC PSU
DDRM v1 DIY use a 12V DC PSU
DDRM v2 DIY use a 12V DC PSU
NO SOUND BUG
The 2pin MTA100 header on the mainboard close to the PSU Slot is wrong labeled, ground and SIG is in wrong orientation (GND = SIG, SIG is GND)