HP 4540s Spécifications télécharger pdf (Page 74)

WWAN module

CAUTION: The WWAN module and the WLAN module are not interchangeable.

Description Spare part number

Ericsson F5321 HSPA+ with GPS 668969-001

Sierra MC8355 HSPA/CDMA with GPS 634400-001

HP un2430 EV-DO/HSPA Mini Card 702080-001

HP hs2350 hspa+ Mobile Broadband Module 710788-001

Before removing the WWAN module, follow these steps:

1. Shut down the computer. If you are unsure whether the computer is off 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 first unplugging the power cord from the AC outlet,

and then unplugging the AC adapter from the computer.

4. Remove the battery (see

Battery on page 55).

5. Remove the bottom door (see

Bottom door on page 58).

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 two Phillips PM2.0×3.0 screws (2) that secure the WWAN module to the computer.

(The edge of the module opposite the slot rises away from the computer.)

66 Chapter 4 Removal and replacement procedures

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HP 4540s Spécifications Page 74