Name  | Function  | 
|---|---|
1: Main Motor  | Drives all the rollers in the unit  | 
2: Tray Sensor (Tray 1) ~ (Tray 9)  | Detects paper in trays 1 ~ 9  | 
3: Vertical Transport Sensor 1  | Detects misfeeds (located between trays 1 and 2)  | 
4: Vertical Transport Sensor 2  | Detects misfeeds (located between trays 3 and 4)  | 
5: Vertical Transport Sensor 3  | Detects misfeeds (located between trays 5 and 6)  | 
6: Vertical Transport Sensor 4  | Detects misfeeds (located between trays 7 and 8)  | 
7: Vertical Transport Sensor 5  | Detects misfeeds (located at the exit to tray 9)  | 
8: Junction Gate Solenoid 1  | Opens/closes the junction gate at the entrance to the mailbox  | 
9: Junction Gate Solenoids 2-9  | Opens/closes the junction gates for trays 1-8.  | 
10: Tray Overflow Sensor 1  | Detects paper full in tray 1.  | 
11: Tray Overflow Sensor 2-9  | Detects paper full in trays 2 to 9 (cannot detect A5).  | 
12: Controller Board  | Controls the unit.  |