Brother MFC-J6510DW Service Manual page 204

Document detection/width sensor PCB, document scanning position sensor PCBs (for first
side scanning and second side scanning*), and ADF cover switch
(41) To remove the document detection/width sensor PCB and the document scanning position
sensor PCBs (for first side scanning and second side scanning*), lightly press the lock arm
of each PCB to the rear and release the rear end of the PCB. Disconnect the harness from
the PCB and remove the PCB.
(42) To remove the ADF cover switch, press the right and left latches on it and push the switch
downwards.
To replace the ADF cover switch, which is a part of the ADF harness unit, it is necessary to
release not only its harness but also the document detection/width & scanning position
(first side) sensors harness and document scanning position sensor harness (second side)
from the cable guides.
(43) Remove the PCB harnesses and switch harness from the lower ADF chute.
Document scanning
position sensor PCB
(first side)
Lock arm
Document scanning position
sensor PCB (second side)*
Lower ADF chute
Lock arm
Document detection/width
sensor PCB
Sensor's bosses
fitted in holes
Lock arm
ADF cover switch
(A part of the ADF
harness unit)
3-79
*For duplex scanning models
(3_044)
(Front)
* For duplex scanning models
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