Brother MFC9100C Service Manual page 80

1.15 Main PCB
(1) Disconnect the following harnesses and flat cables from the main PCB:
- Carriage motor harness
- Speaker harness (if the speaker has not been removed)
- Purge cam HP switch harness
- Paper feed motor harness
- Solenoid harness
- Paper ejection/cassette sensor harness
- Paper width/registration sensor harness
- VC harness
- NCU harness
- Head flat cables
- CCD flat cable
- Panel-main harness
- CCD motor harness
- CCD HP sensor harness
- ADF motor harness
- Document sensor harness
(2) Remove two screws "a" from the interface connector.
(3) Remove four screws "b" from the main PCB.
(4) Slide the main PCB to the left (when viewed from the rear) and to the rear.
(if the NCU PCB has not been removed)
(if the scanner unit has not been removed)
(if the ADF unit has not been removed)
IV - 39
"a": Machine screw, pan M3x6
"b": Taptite, cup S M3x6