44
Position the top cover on the K3. Note that the tab on the back center goes under the rear lip of the K3 rear
panel. Secure the top cover with the nine 4-40 3/16” (4.8 mm) black flat head screws you removed earlier.
REPLACE ALL THE SCREWS!
The K3's chassis has excellent rigidity despite its light weight. The screws that hold the top
cover in place are an important part of the structural design. Please be sure to replace all the
screws and verify they are tight whenever you replace the cover or other panels.
If you installed the optional AUX IN antenna connector on the rear panel, check to be sure
you replaced and tightened all the screws in the right side pane including the heat sink
screws for U12 and U13 and the top screw on the rear panel above the ANT connectors.
Turn to page 45 and perform the steps under Preparing for Operation. Your KRX3 subreceiver will
not operate correctly until you complete all the steps.
Removing the KRX3 Module
You can remove the KRX3 Module by reversing the steps under Installing the KRX3 Subreceiver Module,
above. It is not necessary to remove the Auxiliary DSP or the Auxiliary KSYN3 synthesizer boards to operate
the K3 without the subreceiver module in place, however, leave the KRX3 enabled in the MENU even though
you will see error messages relating to the missing KRX3 module when you switch POWER on. Tap
DISPLAY
to clear the error messages.
If you plan to apply power or operate the K3 with the Subreceiver Module removed, do the following.
Remove all the TMP cables that connect to the KRX3 module so their metal connectors cannot create shorts
by touching solder pads or other components inside the K3. If you have installed the AUX RF connector and
cable (see Installing the Auxiliary KRX3 Antenna Input Via the Rear Panel BNC Connector, page 27) it cannot
be easily removed. Carefully insulate the TMP connector, covering all of the metal parts with electrical tape or
other suitable material that you can remove easily later. Recommend you coil and secure the cable to the rear
panel or, if the KAT3 is installed, tape the cable to the KPA3 shield.
Replace jumper W4 in the connector shown in Figure 45. Be sure to put the jumper on the pins shown.
The main K3 receiver will not work until this jumper is installed.
CAUTION
Failure to remove the loose TMP cables as described above may result in short circuits and
extensive damage to your K3 when power is applied. If you have the TMP cable connecting
to the AUX RF connector on the rear panel, insulate the connector completely. Electrical
tape is a good choice. Tape the fully insulated connector end to the back panel or, (if a
KPA3 is installed) the KPA3 shield so it can’t bang around inside the K3.
(1 pages)
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