Main Pcb - Brother MFC-3340CN Service Manual

5.1.17 Main PCB

CAUTION: Before accessing the main PCB, make sure that the power cord is unplugged from the
electrical outlet and the telephone line is disconnected; otherwise, an electric shock could occur.
CAUTION: At the time of removal of the main PCB, untightening screws should be preceded by
disconnection of the harnesses and flat cables, and at the time of installation, connection of the
harnesses and flat cables, by tightening of screws. Observing this sequence prevents harnesses and
flat cables from getting crushed or damaged by screws or screwdrivers.
(1) Remove three screws "b1" through "b3" from the main PCB shield and lift it up.
b1
b2
Power supply harness
5-44
b3
Main PCB shield
Main PCB
"b1" and "b3": Taptite, cup B M3x8
"b2": Taptite, cup S M3x6
Ink cartridge/purge cam
switch harness
Carriage motor harness
Lower cover
Confidential