Brother MFC-3340CN Service Manual page 145

n Reassembling Notes
• If the main PCB is replaced, attach the thermal conductor rubber removed from the old PCB to a
new one as specified below.
• When securing the main PCB and its shield frame, first tighten four screws "d" and "e" and then
screw "c." See the previous page.
• Before securing the main PCB shield, connect the MJ-line harnesses to the main PCB and route it
through the SDAA enclosure as shown below.
Scanner motor harness and
panel-main harness
• If you replace the main PCB, also replace the ink absorber box. Otherwise, drained ink may
overflow after long-term use.
• If you replace the main PCB, you need to make the specified adjustments and updating of
settings stored in the flash ROM while referring to
sure that the head/carriage unit is installed.
The thermal conductor rubber
should not protrude from the
edge of the PCB.
0 to 2 mm
ain PCB
MJ-main harness
The thermal conductor rubber
should be out of contact with
these connector leads.
0 to 2 mm
Soldered
Thermal conductor rubber
Speaker harness
Main PCB
Chapter 6, Section
5-47
MJ-line harness
SDAA enclosure
6.3. Before starting, make
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