Elecraft PX3 Owner's Manual - Manual (Page 45)

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Be sure the jumper is installed on the Power Supply Board as shown in Figure 17 on page 22. By
positioning the jumper, you can choose how the PX3 power switch behaves as described in the accompanying
text.
Unwrap the left side panel and clean it as needed (see Figure 34). Be careful to avoid scratching the paint
on the outside face of the panel. Only a thin ring of metal around the two holes shown in the figure is needed.
If the tape completely covers a hole, push a blunt tool through from the other side to break it loose.
Figure 34. Preparing the Left Side Panel for Mounting.
Position the left side panel on the front panel assembly and install the two knurled nuts as shown in Figure
37. The knurled nuts must be installed first to ensure the nuts fit properly into recessed openings and contact the
bare metal. Note that the knurled nuts have slots on the side facing away from the panel. You can tighten the
nuts with a small screwdriver or other tool pressed gently in the slot. Take care to avoid scratching the paint.
Figure 35. Mounting the Left Side Panel Part 1.