User's Manual Part 2

OS-1933-E3-003 Field Replaceable Parts and Modules
4-8 044-05243 Rev A
RF Conditioning Unit (RFCU) Removal and Replacement
Perform the steps listed in Table 4-7 to remove and replace the RF conditioning unit shown in Figure 4-4. The
RFCU unit contains unique calibration tables. The OS system will upload the tables to the Controller
automatically upon insertion.
CAUTION: The RFCU weighs approximately 40 lbs. (18.14 kg). When removing the RFCU Module from the
subrack, support it at the rear when the guide rail disengages from the track to avoid dropping the module.
Dropping the RFCU Module could damage the rear multi-pin connector.
Always disable the MCPA of a sector prior to the removal of a MCPA or RFCU of that sector.
Table 4-7 RF Conditioning Unit (RFCU) Removal and Replacement
Step Action
1
Disable the MCPAs in the affected sectors.
2 Disconnect external cables to RFCU interface in the affected sectors.
3 Using a slotted screwdriver with a 8mm (5/16 in) typical blade, loosen the top and bottom fasteners
securing the RFCU to the OS system.
4 With steady pressure, use the handle on the front of the RFCU to slide the unit out of the OS system.
5 Replace RFCU in reverse order
Figure 4-4 RF Conditioning Unit Removal and Replacement
RFCU
Fasteners