Brother MFC-J6510DW Service Manual page 252

Inner paper guide and switchback paper sensor PCB ASSY
(12) Release the switchback paper sensor harness from the cable guide on the left end of the
inner paper guide.
(13) Slightly lift up the front end of the inner paper guide and pull it towards you.
(14) Unlatch the switchback paper sensor PCB ASSY.
Switchback paper sensor
harness
Switchback paper sensor
PCB ASSY
CR guide rail
PF motor frame
Switchback paper
sensor PCB
Inner paper guide
(Front)
Latch
Latch
3-127
Switchback paper
sensor actuator
Platen
(3_098)
Confidential