Hey all
Just wanted to share two quick shortcuts I've sound to getting a DG-20 usable in a modern setting, especially if you order a faulty one. The best way.
The most common fault on these is that someone plugs the wrong power adaptor in at some point and it blows the T3 transistor on the board. All this controls is a battery saving mode, essentially and on/off switch for it with three pins, the signal, and then one path for mode on, one for mode off.
If its blown its usually obvious, the transistor is normally cracked. Get a pliers, crush the casing and expose the three pins. Run a jumper cable to join the pin on either end. Viola. Always on, no battery saving mode (if you're not using it as a toy why is that even necessary?)
Second thing to make it more usable... if you look on ebay, you can find cables with a usb plug one one end with a 9v-5v transformer built in, and a standard 9v jack on the other end. I mean you can use this with a usb battery and plug it in the bottom sure... but if you cut the 9v jack off, solder the two wires to there the battery compartment points usually reach the board, you can run the usb cable into the now empty battery chasm on the back, and jam the usb power bank in there, meaning you have a chargeable guitar midi controller.
Just the two tricks I've been using to make these things more usable. If you want the battery save mode go ahead and drop a transistor in, I aint gonna stop you.