Brother MFC8420 Service Manual page 112

(13) Remove the cup B M3x8 Taptite screw, and then remove the FFC plate.
(14) Remove the sponge and FFC cable ASSY.
FFC plate
Hook
Sponge
FFC cable ASSY
Pin
Scanner base
(15) Remove the cup S M3x6 Taptite screw, and then remove the ground wire.
(16) Remove the four pan B M3x8 Taptite screws, and then remove the drive plate ASSY.
(17) Remove the HP sensor, and then disconnect the connector.
Taptite, pan B
M3x8
Drive plate ASSY
Scanner base
MFC-8420/8820D/8820DN, DCP-8020/8025D/8025DN
Taptite, cup B M3x8
Fig. 4-52
Taptite, cup S M3x6
Ground wire
Taptite, pan B M3x8
HP sensor
Fig. 4-53
4-31
SERVICE MANUAL
Connector