Brother HL-1870N - DX Tray Sensor; DX Paper Size Sensor; Rear Cover Sensor

HL-1850/1870N SERVICE MANUAL
3-25
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.
Fig. 3-26
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.
Fig. 3-27
Rear cover sensor
Exit roller unit
DX sensor PCB assy