Brother MFC-3340CN Service Manual page 125

Releasing the head flat cables from the head joint
(3) Disconnect the head flat cables 1 and 2 from the main PCB and pull them out to the rear
through the opening provided in the lower cover as shown below.
NOTE: Take care not to drop the flat core from the head flat cables.
(4) Peel the right-hand bent section of the FFC support film off section "a" of the cable clamp on
the head joint and take the head flat cables out of section "b."
C support film
Section "b" of
cable clamp on
the head joint
Section "a" of
cable clamp on
the head joint
film
Carriage PCB
Head/carriage unit
Carriage-head flat cable
iewed from the right
C sponge
C support
Head flat cable 1
(17-pin)
Carriage PCB
Head flat cable 2
(19-pin)
Bent section
Opening
Cable clamp on the head joint
5-27
lat core
Head flat cable 1 (17-pin)
Head flat cable 2 (19-pin)
Main PCB
Confidential