Brother DCP-J552DW Service Manual page 200

Encoder strip guard film
(3) On the right end of the CR frame, press the rear end of the guard film spring inward and remove
the left and right end of the encoder strip guard film from the hook.
(4) Rotate the encoder strip guard film in the direction of the arrow shown below. Remove it after
aligning the right end square opening with the boss-shape of the strip support.
Encoder strip guard film
3-83
Strip support
Guard film spring
(3_093)
Confidential