Latitude 5521 Service Manual

Removing the keyboard assembly

Follow the procedure in Before working inside your computer.
Remove the SIM card.
Remove the microSD card.
Remove the base cover.
Remove the memory module.
Remove the 2280 solid-state drive or 2230 solid-state drive.
Remove the WLAN card.
Remove the WWAN card.
Remove the battery.
Remove the heat sink - UMA or discrete based on the system configuration.
Remove the assembly inner frame.
Remove the system board.
NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve the thermal bond between the system board and heat sink.

The following images indicate the location of the keyboard assembly and provide a visual representation of the removal procedure.

Removing the keyboard assembly

NOTE: For models shipped with a USH module, disconnect the USH cable from the keyboard bracket.
Lift the latch and disconnect the keyboard cable and keyboard backlit cable (for models that are shipped with the keyboard backlight) from the touchpad.
Remove the twenty seven (M2x2) screws that secure the keyboard assembly to the palm-rest.
Carefully lift the keyboard assembly from the palm-rest.
Remove the keyboard assembly off the palm-rest assembly.