Latitude 7455 Owner's Manual

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Removing the WLAN-antenna module (for computers shipped with WWAN support)

CAUTION: The information in this removal section is intended for authorized service technicians only.

NOTE:The information in this removal section is only applicable for computers that are shipped with WWAN support.

The following images indicate the location of the WLAN-antenna module and provide a visual representation of the removal procedure.

Remove the screw (M2x2.5) that secures the WLAN-thermal shield to the WLAN module.
Slide the WLAN-thermal shield to the left and lift the shield off the palm-rest and keyboard assembly.
NOTE:The WLAN-thermal shield includes a thermal pad that is attached to the bottom of the shield. Ensure that you adhere the thermal pad back to its location if it is displaced during the removal procedure.
Figure 3. Thermal pad below the WLAN-thermal shield
Disconnect the WLAN-antenna cables from the connectors (B and W) on the WLAN module.
Disconnect the I/O cable (MB) from the connector (JIO1) on the system board.
Remove the I/O-board cable from the routing guides above the WWAN I/O-board FPC cable.
Peel the coin-cell battery and move it along with its cable from the routing guide on the palm-rest and keyboard assembly.
Peel away the Mylar that secures the WLAN-antenna cables to the palm-rest and keyboard assembly.
Remove the screw (M2x2.5) that secures the WLAN-antenna module to the palm-rest and keyboard assembly.
Remove the WLAN-antenna cables from the routing guides on the palm-rest and keyboard assembly.
NOTE:Ensure that you remove the antenna cables from its routing guides under the heat sink.
Figure 4. Removing WLAN-antenna cables
Lift the WLAN-antenna module off the palm-rest and keyboard assembly, ensuring that you thread the WLAN-antenna cables through the routing guide beneath the heat sink.