Dell Latitude 7220 Service Manual page 48

Steps
1. Disconnect the antenna cable from the system board.
2. Disconnect the radio antenna cables and coin-cell battery cable from the system board.
3. Disconnect the antenna cables from the system board.
4. Disconnect the GPS cable from the system board.
5. Peel the adhesive tapes off the connectors from the system board.
6. Disconnect the following cables from their connector on the system board (L-R): microphone board, LTE main+ p-sensor, mic,
smartcard, Fingerprint reader, microSD card, NFC, Mini serial, speaker, pogo connector, right battery, and left battery from the system
board.
NOTE: Carefully slide the microSD cable and NFC cable out from the rubber grommet. Ensure that the pull tab of the
FPC cables are not stuck under the rubber grommet. The FPC cables may get damaged, when they are forcefully slid
out when their pull tabs are still stuck under the rubber grommet.
7. Remove the screw (M2x5) that secures the adhesive tape, and peel the adhesive tape off the system board.
8. Remove the two (M2x3) screws that secure the camera MIPI plate to the system board.
9. Peel the conductive cloth that secures the camera MIPI plate on the system board.
10. Lift the latch, and disconnect the OpExpansion module pogo connector cable from the system board.
11. Lift the latch, and disconnect the rear camera flexible flat cable (FFC) from the system board.
12. Lift the latch, and disconnect the power button cable from the system board.
13. Slide and remove the microSD cable and NFC cable under the grommet.
14. Remove the three (M2x5) screws and two (M1.6x5) screws to remove the bracket that secures the system board to the tablet
chassis.
15. Disconnect the power adapter cable and remove the (M2x5) screw that secures the system board to the tablet chassis.
16. Remove the six (M2x5) screws that secure the system board to the tablet chassis.
17. Lift the system board away from the tablet chassis.
48 Removing and installing components