Brother HL-7050 Service Manual page 108

2.3 Sensors
2.3.1 Cover open sensor
Detects opening and closing of the front cover.
2.3.2 Multi paper tray paper empty sensor
Detects if there is paper in the MP tray.
Fig. 3-9
Multi paper tray paper empty sensor
MP tray unit
Fig. 3-10
3-13
HL-7050 SERVICE MANUAL
Cover open sensor