Brother DCP6690CW Service Manual page 255

(3) To remove the DX spring lock that secures the right end of the DX unit, press the rib and
pull out the DX spring lock.
(4) To remove the DX spring lock that secures the left end of the DX unit, first release the two
harnesses (switchback paper detection sensor harness and DX cam switch harness) from
the cable guide provided on the internal left end of the lower cover. Then press the rib on
the DX spring lock and pull it out. Release the two harnesses from the DX spring lock.
(5) Slightly pull the duplex unit to the front and take it out of the lower cover, with the right
end first.
DX spring lock
Rib
Viewed from the bottom
DX spring lock
Viewed from the bottom
Lower cover
Duplex unit
DX spring lock
Opening
Cable guide
Switchback paper detection sensor harness
and DX cam switch harness
6-74
(Rear)
Viewed from the bottom
DX spring lock
(6_Duplex_2)
Rib
Confidential