Brother DX-2000 Service Manual page 17

(4) Loosen the four screws (two on each side).
Top cover
Taptites,
cup S M3 x 6
(5) Slide up the top cover to disengage the five engaging locks from the inside frame
unit, and separate the top cover from the Duplex unit.
Push the bosses in these holes,
and remove the gear cover.
Top cover
Engaging locks
Figure 4.11
Gear cover
Figure 4.12
IV-6
Top cover
Engaging locks
Inside frame unit
Taptites,
cup S M3 x 6