Latitude 5521 Service Manual

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Screw list

NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.

NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surface when replacing a component.

NOTE: Screw color may vary with the configuration ordered.

Table 1. Screw listScrew list
Component	Screw type	Quantity	Screw image
Base cover	Captive screws	8	N/A
Wireless card	Captive screws	1	N/A
Wireless Wide Area Network (WWAN) Card	M2x3	1
M.2 2230 solid-state drive	M2x3	4
M.2 2280 solid-state drive	M2x3	2
Assembly inner frame	M2x3 M2x5	7 2
4-cell battery	M2x3	2
Heat sink with fan assembly - UMA	M2x3 M2x5 (for fan)	4 2
Heat sink with fan assembly - Discrete	M2x3 M2x5 (for fan)	6 2
eDP cable/bracket	M2x3	2
USB Type-C support bracket	M2x5	3
System board	M2x3	4
Power button	M2x2.5	2
Smart card reader	M2x2.5	3
LED board	M2x3	1
Keyboard assembly	M2x2	18
Keyboard bracket	M2x2	5
Display assembly	M2.5x5 (display hinges to palm-rest assembly)	4
Display hinge	M2.5x3 (display hinges to display back cover)	4
Display panel	M2.5x3	2