Brother HL-7050 Service Manual page 109

CHAPTER 3 THEORY OF OPERATION
2.3.3 Tray paper empty sensor
Detects if there is paper in the paper tray.
2.3.4 Face up open sensor / Fuser exit sensor
Detects opening and closing of the back cover. It also detects if there is any jammed paper in
the fixing unit.
Face up open senor
& Fuser exit sensor
Paper eject unit
Fig. 3-11
Fig. 3-12
3-14
Tray paper empty sensor