Dx Tray Sensor / Dx Paper Size Sensor; Rear Cover Sensor - Brother HL-1850 Service Manual

2.3.3

DX tray sensor / DX paper size sensor

The DX tray sensor detects if the DX tray in installed, and the DX tray size sensor detects if the
correct size of paper is selected.
DX sensor PCB assy
2.3.4

Rear cover sensor

Detects opening and closing of the rear cover. It also detects an error if the rear cover is open
when duplex printing is selected.
Exit roller unit
Fig. 3-26
Rear cover sensor
Fig. 3-27
3-25
HL-1850/1870N SERVICE MANUAL