Brother MFC620CN Service Manual page 187

(3) Disconnect the MJ-line harness from the main PCB.
(4) Remove the SDAA enclosure from the main PCB.
(5) Disconnect the following harnesses and flat cables from the main PCB.
CAUTION: Do not remove the screws from the main PCB before disconnecting harnesses
and flat cables.
MFC620CN /420CN/410CN, FAX2440C and DCP310CN
- Power supply harness (4-pin)
- PF motor/sensor PCB harness (7-pin)
- Carriage motor harness (2-pin)
- MJ-main harness 1 (2-pin)*
- Speaker harness (2-pin)
- Head flat cable 1 (17-pin)
- Head flat cable 2 (19-pin)
MJ-line harness
5-49
DAA enclosure
Main PCB
* Not provided on the DCP310CN.
** Not provided on the FAX2440C.
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