Sony VAIO PCG-R505JLP User Manual page 45

Using the UNDOCK switch
1 Pull the UNDOCK switch on the right side of your notebook. The "Undock
Complete" dialog box appears.
Once the "Undock Complete" dialog box appears, continue on to step 2 to finish
undocking the notebook. This prevents you from leaving the notebook on the docking
station in this released state for too long.
UNDOCK switch
2 Release and remove your notebook as described in the "Disconnecting the
docking station when the notebook is off" section.
Connecting the Docking Station
UNDOCK
Switch
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