Disassembly of DP-9900Plus/DP-9900 
3-4 
 
 
 
1 – Data Line  2 – Power Cord  3 – Footswitch Cable  4 - M3×6 Screw 
5 – Ground Wire  6 - Base  7 - Keyboard   
3.4.2. Disassembly of Trackball 
1.  Place the keyboard face down and remove the two M2.5×16 screws.   
2.  Disconnect the trackball cable and raise the trackball. 
M3×12 Screws