The board contains power conditioning circuitry that is absent on the early version. The wiring loom is also different - different connection point numbers, different ground "harness".
The DD-2/DD-3 schematic circulating on the www is for the later version.
On the public schematic, there is a board shown on the left of the diagram called "DC SUPPLY BOARD". That board, and all the associated electronics is missing. The power is supplied like any other Boss pedal at the time.
Not that I can tell. I'm presuming that the power conditioning was added in the later production runs because the pedal was susceptable to noise on the power supply.
TWO versions of the DD-2
Posted - 03/06/2010 : 18:23:54
