Harris Ranger Series, Commissioning Manual

Page: 148 / 162

5-8 888-2685-001 12/24/07
WARNING: Disconnect primary power prior to servicing.
Ranger Commissioning Manual
Section 5 Replacement Procedures
STEP 6
The circulator screws are hex head and require an allen tool to remove.
These screws are shown in Figure 5-6.
Figure 5-6 Circulator Side View
STEP 7
Clean the old thermal compound off of the heatsink with cotton cloth
and alcohol. Put a thin layer of thermal compound on the new circulator
and mount it to the heatsink.
STEP 8
Push the modules back into place. Have someone hold the modules
firmly in place or tape them to the cabinet for the next step.
STEP 9
Re-install the adjustable plate with the circulators mounted on it. With
the modules held in place, seat the circulators into the module. The
marks you made earlier should be very close to lining up. They should
not be any further away from the module than before. The most
important thing is that you are not holding the module away from the
lower connector but are making good RF contact to the circulator.
STEP 10
Tighten the screws (C) in the adjustable plate and then re-connect the RF
output and reject cables to the circulators. Make sure you connect the
cables to the same circulator as before.
NOTE:
Swapping the output cables will cause all of the power to end up in the combiner
reject load, while swapping the reject cables will cause the attenuator readings to
be reversed on the GUI and therefore protect the wrong attenuator.
It should not be necessary but you may want to check module phasing and adjust if
necessary for the CZ1000F, see "3.7.2 Module Phasing Procedure" on page 3-18.
Remove