Brother MFC990CW Service Manual page 233

For wireless LAN-enabled models, remove the front cover and WLAN PCB using the
following steps.
(4) Release the grounding wire by removing the screw and disconnect the WLAN PCB harness
from the main PCB. (See the illustration on the previous page.) Then release the grounding
wire and WLAN PCB harness from the cable guides provided on the lower cover.
(5) Lightly lift up the front end of the lower cover and remove the front cover together with the
WLAN PCB.
(6) Release the two latches on the front cover and take out the WLAN PCB.
Linear boss
PCB support section
Assembling Notes:
• For wireless LAN-enabled models
- When mounting the front cover and WLAN PCB onto the lower cover, route the
WLAN PCB harness and grounding wire as shown on the previous page.
- When securing the grounding wire to the main PCB shield frame with a screw, set the
crimped section of the grounding terminal in the slit provided in the lower cover.
- When mounting the WLAN PCB on the front cover, fit the cutout of the WLAN PCB to
the PCB support section inside the cover.
• When mounting the front cover, lightly lift up the front end of the lower cover and fit the
linear boss provided on the inside bottom of the front cover over the bottom of the lower
cover.
WLAN PCB
Cutout
Latch
6-49
Grounding wire
WLAN PCB harness
Latch
Front cover
(6_45)
Confidential