Brother HL-5040 - Cassette Sensor; Paper Empty Sensor (HL-5040;5050;5070 N Only); Paper Eject Sensor

CHAPTER 3 THEORY OF OPERATION
3-24
2.3.3 Cassette sensor / Paper empty sensor (HL-5040/5050/5070N)
Detect if the paper cassette is installed. They also detect if there is paper in the paper
cassette.
Fig. 3-37
2.3.4 Paper eject sensor
Detects if paper is ejected from the fixing unit.
Fig. 3-38
Paper empty sensor
Eject sensor PCB ASSY
Fixing unit
Cassette sensor PCB ASSY
Cassette sensor