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Removal and replacement procedures
Maintenance and Service Guide 4–15
WWAN module
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CAUTION: The WLAN module and the WWAN module are not interchangeable.
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 4-8).
5. Remove the SIM (see “SIM” on page 4-9).
6. Remove the hard drive cover (see “Hard drive” on page 4-10).
Remove the WWAN module:
1. Disconnect the WWAN antenna cables 1 from the terminals on the WWAN module.
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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.
2. Remove the two Phillips PM2.5×4.0 screws 2 that secure the WWAN module to the computer. (The edge of
the module opposite the slot rises away from the computer.)
3. Remove the WWAN module 3 by pulling the module away from the slot at an angle.
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WWAN modules are designed with a notch 4 to prevent incorrect insertion into the WWAN module slot.
Reverse this procedure to install the WWAN module.
Description Spare part number
HSPDA EV-DO WWAN module 483377-002