Brother MFC640CW Service Manual page 135

• 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.
CIS motor harness and
Panel-main harness
(MFC640CW/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
sure that the head/carriage unit is installed.
Speaker harness
(red)
MJ-main harness *
(black)
Main PCB
5 - 4 9
MJ-line harness *
(blue)
SDAA enclosure
* Not provided on the
DCP340CW
Chapter 6, Section 6.3. Before starting, make
Confidential