Board Structure 
D017/D018/D019/D020 6-12  SM 
6.2 BOARD STRUCTURE 
6.2.1 MAIN BOARDS 
 
Here is a summary of the new features of the boards in this machine. For more details, 
please refer to the point-to-point diagram provided with the machine. 
BCU (Base Engine Control Unit) 
This is the scanner and engine control board. It controls the following functions: