Brother MP-21C Service Manual page 68

(4) Remove the Power supply PCB ASSY from the Bottom cover by releasing the four
hooks.
(5) Unlock and remove the Power supply FFC from the connector on the Power
supply PCB ASSY.
Power supply FFC
<Reassembly>
Note: Insert the Power supply FFC into the connector on the Main PCB ASSY,
with the terminals facing upwards.
After inserting the Head FFC into the connector on the Main PCB ASSY,
lock the connector.
Hook
Hook
Fig. 3.19
III-15
Power supply PCB ASSY
Bottom cover
Hook
Hook