Brother MFC640CW Service Manual page 134

(9) MFC640CW/820CW, European/Oceanian/Asian models The thermal conductor rubber is
attached to the solder side of the main PCB. When replacing the main PCB, gently remove the
thermal conductor rubber from the main PCB and attach it to a new PCB. (For details, see the
reassembling notes below.)
(10) Pull the WLAN PCB up and out of the lower cover.
Reassembling Notes
• MFC640CW/820CW, European/Oceanian/Asian models If the main PCB is replaced, attach
the thermal conductor rubber removed from the old PCB to a new one as specified below.
The thermal conductor rubber
should not protrude from the
edge of the PCB.
• When securing the main PCB and its shield frame, first tighten four screws "d" and "e" and then
screw "c." See the previous page.
0 to 2 mm
0 to 2 mm
ain PCB
WLAN PCB
Lower cover
The thermal conductor rubber
should be out of contact with
these connector leads.
Soldered
Thermal conductor rubber
5 - 4 8
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