The DIP switches (and PROM) are on the bottom of the DBV-200 head. All my machines have WBA units (switches on the side) so I can't show the DBV assembly. That said, some google searches led back to several threads here on NLG for them. The head and transport should be removable as a unit. It appears there is a red lever on the left side of the head and possibly two large headed screws just above the cash can that door hold the unit in. Those released, it should slide forward and out. You may have to disconnect wire plug connections on each side to slide it out far enough to flip the assembly over?