Brother MP-21C Service Manual page 66

(3) Lift up the Bottom cover. Turn it over, then place it down next to the Paper feed
frame ASSY
Note: DO NOT apply any stress to the harnesses connected to the Main PCB
ASSY.
(4) Remove the Carriage motor harness 2P, Paper feed motor harness 4P,
Maintenance sensor FFC 3P, and Encoder FFC 5P from the Main PCB ASSY.
Paper feed motor harness 4P
Carriage motor harness 2P
Main PCB ASSY
Head FFC
<Reassembly>
Note: When attaching the Bottom cover to the printer, check that the Carriage
motor harness 2P is not caught between the Chassis R and the Bottom
cover.
Main PCB ASSY
Fig. 3.16
Encoder FFC 5P
Fig. 3.17
III-13
Bottom cover
Maintenance sensor FFC 3P
Bottom cover