User's Manual
9-36 68P81093C75-A
7. Pull the Receiver and Exciter Modules away from the
backplane until they disengage from the backplane card edge
connectors (approximately 1/2").
NOTE: Be careful to not put any tension on the coaxial
cables between the Exciter, PA, and IPA (for 800
MHz). If necessary, disconnect one or more of the
cables as described in the Exciter Module
replacement subsection.
8. On the back of the chassis, remove the six Phillips screws
holding the backplane in place. Pull the backplane down and
away from the chassis.
9. Disconnect all of the wires and cables from the backplane.
10. If the DIP switches on the new backplane have not been set to
match the PA/Exciter combination of the station, set them now
according to Table 9.
11. Attach all the wires to the new backplane as shown in Figure
10. Interconnect Diagram.
12. Hold the new backplane in position behind the chassis. Ensure
the wires from the backplane do not bind against the Power
Supply or Exciter modules. Slide the top of the board toward
the chassis top panel, making sure the two RJ-45 connectors fit
into their cutouts in the top panel, and push the backplane flat
against the back of the chassis.
13. Start the six Phillips screws with lock washers to hold the
backplane in place, but do not tighten them.
14. While applying opposing pressure to the backplane on the back
of the chassis, push the Receiver, Exciter, Station Control, and
Wireline (if applicable) modules back into the chassis until they
snap into the card edge connectors on the backplane. (Do not
slam the modules against the backplane or push any harder than
necessary to seat the connectors.)
15. Reattach any cables which were removed from the Receiver,
Exciter, or IPA.
16. Tighten the six Phillips screws holding the backplane to the
chassis.
17. At this point, the station may be powered up while it is still out
of the case to make sure the new backplane is correctly attached
and functioning properly. If any of the LEDs do not light, are
dim, or flash rapidly, one or more of the modules are not seated
properly. Unplug the station before continuing to the next step.
18. Reassemble the station by reversing Steps 2 through 4.