Brother DCP-9040CN Service Manual page 201

(22) Push holders (22a) to release the ADF sensor PCB and lift the PCB from under the two
Hooks of the Lower document chute.
(23) Disconnect the ADF sensor harness ASSY from the ADF sensor PCB.
ADF sensor harness ASSY
Hooks
(24) Remove the ADF motor harness from the ADF motor.
ADF motor harness
ADF sensor PCB
23
22c
22a
22a
22b
Fig. 3-72
ADF motor
Fig. 3-73
3-69
Lower document chute
Hooks
Lower document chute
Confidential