Laser Optics 
M018/M019 4-8  SM 
4.4.2  LASER OPTICS HOUSING UNIT 
1.  Rear cover ( p.4-3) 
2.  Controller box cover ( p.4-43 "Controller Board") 
3.  Remove the controller bracket ( p.4-45 "EGB (Engine Board)") 
 
4.  Disconnect the three harnesses from CN301, 302 and 303 on the EGB (
 x 3). 
 
5.  Open the top cover [A]. 
 
http://www.manuals4you.com