Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 222

(6) Release the two Hooks of the LED holder to remove it from each of the four Toner sensor
PCB ASSYs (TE/NEW).
LED holder
Assembling Note:
Assemble the Toner sensor PCB ASSY (TE/NEW) so that the Shutter of the New toner
actuator is put into the sensor section of the Toner sensor PCB ASSY (TE/NEW).
New toner actuator
Hook
Hook
Fig. 3-166
Shutter
Sensor section
Fig. 3-167
3-113
Toner sensor PCB ASSY (TE/NEW)
Toner sensor PCB ASSY (TE/ NEW)
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