Laser Unit 
D017/D018/D019/D020 3-20  SM 
3.4.5  LASER SYNCHRONIZATION DETECTOR 
1.  Remove the laser unit (see ‘Laser Unit’). 
 
2.  Remove the heat sink [A] ( x4). 
3.  Remove the laser unit cover [B] ( x3). 
 
4.  Remove the bracket [C] ( x1). 
5.  Replace the laser synchronization detector [D] ( x1).