It's a power supply, and the model depends on what voltage / country you are in.
http/www.behringer.com/assets/MX1604A_P0087_M_EN.pdf
Here is the manual which you can look up the part number in.
The power supply must be purchased from the manufacturer, through the authorized dealer.
There is no service, schematics, or other info, unless you order it through a dealer.