Sony PCG-F420 Users Guide - Page 82

% VAIO® Notebook User Guide ❑ Electrostatic discharge (ESD) can damage memory modules and other components. Perform the procedures described below only at an ESD workstation. If such a station is not available, do not work in a carpeted area, and do not handle materials that produce or hold static electricity (cellophane wrappers, for example). Ground yourself by maintaining contact with an unpainted metal portion of the chassis while performing the procedure. ❑ Do not open the memory module package until you are ready to install the module. The package protects the module from ESD. ❑ Use the special bag for preventing ESD or use aluminum foil when you store the memory module. PCG-F480/PCG-F420 Typical expansion memory configuration Total System Memory Slot 1 (MB) (MB) 128 64 192 64 256 128 Slot 2 (MB) 64 128 128 PCG-F490 Typical expansion memory configuration Total System Memory Slot 1 (MB) (MB) 192 128 256 128 Slot 2 (MB) 64 128 To remove a memory module 1 Shut down your computer and disconnect all peripheral devices, such as your printer. 2 Unplug the computer and remove the battery packs.