Brother HL-4000CN Service Manual page 167

7) Lift the shaft of roll REGI metal, pull out the roll REGI metal together with the bush
metal R (white).
8) Release the 2 hooks on the bottom of chute ASSY REGI that secure the OHP
sensor ASSY.
9) Remove the OHP sensor ASSY from the chute ASSY REGI.
Rear
Roll REGI metal
Fig.4-56
Fig.4-57
IV-35
Chute ASSY REGI
Sensor ASSY OHP