WWAN module
The WLAN module and WWAN module are not interchangeable.
The WWAN module is available on select models only.
Description Spare part number
LTE CAT4: Huawei HP lt4132, LTE/HSPA+ w/GPS 845710-003
LTE CAT9: Fibocom lt4210 LTE/HSPA+ w/GPS 917823-001
Before removing the WWAN module, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 33).
5. Disconnect the battery cable from the system board (see Battery on page 46).
Remove the WWAN module:
1. Position the computer upside-down.
2. Disconnect the WWAN antenna cables (1) from the terminals on the WWAN module.
NOTE: The red WWAN antenna cable is connected to the WWAN module ‘Main’ terminal. The blue
WWAN antenna cable is connected to the WWAN module ‘Aux’ terminal.
3. Remove the Phillips M2.0×2.0 screw (2) that secures the WWAN module to the computer. (The edge of
the module opposite the slot rises away from the computer.)
40 Chapter 5 Removal and replacement procedures for Customer Self-Repair parts
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