Dell Latitude 5420 Rugged Service Manual page 104

2. Remove the:
a) Batteries
b) Bottom chassis cover
c) WLAN card
d) WWAN card
e) PCIe Heatsink fan assembly
f) Docking port assembly
3.
NOTE: Depending on the order configuration details the system may have either of the heatsink assembly.
assembly
Unroute the antennae cables from the tabs on the heatsink pipe.
4. Remove the five 'M2.5*5' screws [1] and two 'M1.6*5' [2] screw from the thermal module.
5. Lift and the heat sink assembly from the computer [3].
104 Removing and installing components
DSC Heatsink