Elecraft K3EXREF - Manual (Page 6)

6
Installation Procedure
Removing the K3Top Cover and Chassis Stiffener
Disconnect power and all cables from your K3.
Remove the nine screws to free the top cover as shown in Figure 1. After the cover is open, lift it gently to
reach the speaker wire connector. Unplug the speaker then set the top cover aside in a safe place.
Whenever you remove screws from a panel, if one screw seems too tight to loosen
without damaging it, first loosen the other screws then try again. Sometimes one screw
binds in its hole when the other screws are tightened.
Figure 1. Removing K3 Top Cover.
CAUTION: Touch an unpainted metal ground or wear a grounded wrist strap
before touching components or circuit boards inside the K3. See page 4 for more
information.
Remove the stiffener bar that runs from side to side across the top of the K3 chassis. This is the bar the
three screws across the center of the top cover thread into. The bar is held in place by a single screw at each side
and, if the KPA3 100 watt option is installed, by two screws attaching it to the KPA3 shield. Some KPA3
shields have PEM nuts permanently attached to the shield for the screws. Others use ordinary nuts that must be
removed with the screws and lock washers.
Installing the TMP Cable
If you have the K144XV 2-meter module installed, remove it as follows. Otherwise go to the next step with
a square check box.
1. Unplug the single red wire power lead from the 12V connector on the K144XV module.
2. Remove the three 6-32 screws that secure the K144XV module to the left side panel as shown in
Figure 2.