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Make sure you have:
1. The option card
2. The option card manual
3. A Phillips screwdriver.
Powering DownPowering Down
First, turn the power switch OFF. Then unplug the power cord
from the wall outlet and turn the main unit around so that the
back is facing you.
WARNING: Never open the QX-10 while it is plugged into a wall
outlet!
Removing the Option Cards Cover
Unscrew the Phillips screws on each side of the option access
slots. The lift-off cover is completely detachable. To remove it, tilt
it up and away from you. There are two hingelike protrusions on
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