Brother MFC-J6510DW Service Manual page 231

Encoder strip guard film
(3) At the right end of the CR support chassis, push the rear end of the guard film spring
inwards, unhook the right end of the encoder strip guard film from the spring, and then
unhook the left end from the CR support chassis.
(4) Slide the guard film to the right, align the rectangular hole in the right end of the film with
the strip support and take the film off.
Encoder strip guard film
Lower cover
3-106
Guard film spring
Strip support
(3_073)
Confidential