This device uses electricity, so it is best to unplug it before going any farther.

Remove 5 11.08mm Phillips screws that will come out of the casing once loose.

There is one Phillips screw at the bottom center set deep inside the casing - it is easy to get to with a thin screwdriver. This screw will come loose, but stay inside the casing. Don't be surprised when it won't drop out.