Brother MFC640CW Service Manual page 132

(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.
- WLAN PCB harness
- 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)
MFC640CW/DCP340CW
Speaker harness (2-pin)
MJ-main harness 1 (2-pin)*
Carriage motor harness (2-pin)
PF motor/sensor PCB
harness (7-pin)
(Panel-main harness)
(9-pin, MFC640CW)
(6-pin, DCP340CW)
(Scanner motor harness)
(4-pin)
(ADF harness )
(10-pin)
(Hook switch harness)
(6-pin, MFC640CW)
Power supply harness
(4-pin)
WLAN PCB harness
MJ-line harness (2-pin)*
Main PCB
Media 2
Media 1
(Compact Flash)
(SM/XD/SD/MS card)
(Front)
5 - 4 6
*Not provided on the DCP340CW.
* Not provided on the DCP340CW.
Head flat cable 1 (17-pin)
Head flat cable 2 (19-pin)
(CIS flat cable) (12-pin)
(USB)
(LAN)
(Battery harness)
(4-pin, MFC640CW)
(Ink cartridge/purge
switch harness)
(9-pin)
Confidential