Brother DCP6690CW Service Manual page 222

(9) Place the upper cover upside down.
(10) Release the rear end and the loop of the encoder guard spring from the spring guide and
boss on the upper cover, respectively.
(11) Unhook the encoder guard spring from the encoder guard film.
(12) Slide the film inwards, turn it to the front by 90°, and release the opposite end (no spring)
of the film from the boss on the upper cover.
Spring guides
Encoder guard film
Upper cover
(placed upside down)
Encoder guard spring
Boss
(Front)
6-41
Encoder guard film
Square hole
(Front)
Boss
(6_35_1)
Confidential