5-49 Confidential
• MFC640CW/820CW Before securing the main PCB shield, connect the MJ-line harness and
MJ-main harness to the main PCB and route them through the SDAA enclosure as shown below.
SDAA enclosure
MJ-line harness *
(blue)
Speaker harness
(red)
MJ-main harness *
(black)
CIS motor harness and
Panel-main harness
(MFC640CW/DCP340CW)
Main PCB
* Not provided on the
DCP340CW
• 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 Chapter 6, Section 6.3. Before starting, make
sure that the head/carriage unit is installed.
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