User's Manual Part 1

Chapter 3 Installation
3.8.1 Combined DRU Pre-installation
Several components mounted on the HPA compartment frame
backplane must be loosened prior to installing the DR filter box and
HPA’s. Not doing so could damage a number of blind mate connectors.
During product shipment, shear forces may cause some components mounted to the HPA
compartment frame backplane to become slightly misaligned. It is important that these
components are loosened prior to installing the DR filter box and HPA’s. Loosening these
components allows the DR filter box and HPA’s to slide into the HPA compartment frame with
less restrictions.
Please refer to Figure 3-15
for the locations of the components that should be loosened.
1. Loosen the two (2) 8-32 socket head cap screws which secure the LB U-link/coupler
to the backplane (Figure 3-15
, item 1).
2. Loosen the two (2) 8-32 socket head cap screws which secure the HB U-link/coupler
to the backplane (Figure 3-15
, item 2).
3. Loosen the two (2) 8-32 socket head cap screws which secure the combined output
coupler to the backplane (Figure 3-15
, item 3).
4. Loosen the two (2) 8-32 socket head cap screws which secure the LB filter input
adapter to the backplane (Figure 3-15
, item 4).
5. Loosen the two (2) 8-32 socket head cap screws which secure the LBD filter input
adapter to the backplane (Figure 3-15
, item 5).
6. Loosen the two (2) 8-32 socket head cap screws which secure the LBD filter output
to the backplane (Figure 3-15
, item 6).
7. Loosen the two (2) 8-32 socket head cap screws which secure the HB filter input
adapter to the backplane (Figure 3-15
, item 7).
Once the HPA compartment frame backplane components have been loosened, the installer
can proceed to install the DR filter box and HPA’s.
SX03-10000-01-M01 3-18