5-6 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Maxiva ULX COFDM Series
5.2.4 Operation With Inoperative PA Modules
The PA module reject loads, located inside the module combiner, are sized with enough
margin to allow operation under any imbalance condition that may be encountered. As
long as one module is installed and operational the transmitter will continue to produce
RF power but at reduced levels (depending on how many modules are removed).
5.2.5 PA Module/Rack Alignment
If difficulty installing modules is encountered and misalignment of the rack is
encountered an alignment of the rack may be needed. The following steps outline the
alignment procedure:
STEP 1 Disconnect power from transmitter. Turn off breakers AC1 and AC2
on the cabinet being aligned.
STEP 2 Drain system of coolant.
STEP 3 Remove all PA and IPA modules from the rack half being aligned.
STEP 4 Loosen manifold clamps (bolts) for the section of the rack being
aligned. The clamps are shown in Figure 5-3.
NOTE:
If both halves of the rack need alignment start with alignment of the bottom half
first. Align the top half second.
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