No.  | Description  | No.  | Description  | 
|---|---|---|---|
1  | Laser optics positioning motor (Y) (M23)  | 5  | LD drive board (M/Y) (PCB15)  | 
2  | Laser optics positioning motor (M) (M24)  | 6  | LD drive board (Bk/C) (PCB14)  | 
3  | Laser optics positioning motor (C) (M25)  | 7  | Synchronizing detector board (PCB17)  | 
4  | Polygon mirror motor (M27)  | -  | -  |