Main Pcb Assy - Brother MFC Series Service Manual

9.11 Main PCB ASSY

Note If you replace the Main PCB ASSY, you need to replace the Ink absorber box and
•
Flushing box, and the reset the purge and flushing counters.
Before starting work involving the Main PCB ASSY, make sure that the Power cord
•
and telephone line is unplugged from their outlets. There is a danger of electric
shock while working if you leave the Power cord or telephone line plugged.
Before removing the Main PCB ASSY, disconnect the harnesses and flat cables
•
first, then remove the screws. Also, before reinstalling the Main PCB ASSY,
tighten the screws first, then connect the harnesses and flat cables. Follow this
sequence while making sure that harnesses and flat cables are not damaged by
the screws and the screwdriver.
(1) Disconnect the following harnesses and flat cables from the Main PCB ASSY.
Note Make sure that the Main PCB ASSY is screwed in place while connecting and
•
disconnecting harnesses and flat cables.
After disconnecting the flat cables, check that each cable is not damaged at its
•
end or short-circuited. Insert the flat cable straightly. After it is inserted, confirm
that the cable is not skewed.
ADF motor harness (4-wire)
Document detection sensor
harness (3-wire)
Document scanner motor
harness (4-wire)
PF/Registration sensor
harness ASSY (7-wire)
Carriage motor harness
(2-wire)
Power supply harness
(6-wire)
Paper feed motor
harness (2-wire)
Speaker harness (2-wire)
Document scanning position sensor harness
(3-wire)
CIS flat cable
(12-wire)
Main PCB ASSY
Scanner cover
open sensor
harness (2-wire)
Panel harness
(6-wire)
3-65
(USB interface)
Carriage flat cable 1
(14-wire)
Carriage flat cable 2
(9-wire)
Ink cartridge detection
sensor flat cable
(16-wire)
Modem PCB harness
(11-wire)
Ink cartridge
cover sensor harness
Purge cam switch
(2-wire)
harness (2-wire)
(3_046L)
Confidential