User's Manual Part 2

Chapter 6 Maintenance
6.5.9.3 Low Band HPA Removal
The LB HPA should be removed in the following sequence:
1. Open the electronics compartment front door.
2. Open the HPA compartment front door.
3. Using the LBE GUI, place the LB sub-system in standby mode.
4. Switch OFF the LB HPA PSU circuit breaker (CB2), located on the PDU.
5. Switch OFF the HPA-L 5A circuit breaker, located on the BMS front panel.
6. Remove the magnetic plate from the HPA front panel and set it aside by loosening the
10-32 Phillips head captive screw (located at the bottom of the HPA front panel) – see
Figure 6-16
.
7. Loosen the 10-32 Phillips head captive screw (located at the top of the HPA front
panel) – see Figure 6-16
.
8. Using two handlers, one located on each side of the HPA, pull the HPA from the HPA
compartment frame and set it aside.
6.5.9.4 Low Band HPA Installation
The replacement LB HPA should be installed in the following sequence:
1. Using two handlers, one located on each side of the HPA, lift the replacement HPA
and position it level to the open space in the HPA compartment frame to the left of
the DR filter box.
2. Carefully line up the HPA sliders (1 located on the top and 1 located on the bottom of
the HPA) with the slide rails mounted in the HPA compartment frame – see Figure
6-16
.
3. Slowly push the HPA into the HPA compartment frame until it stops.
4. There are three (3) blind mate connectors located on the HPA rear panel which are
aligned with corresponding connectors on the HPA compartment frame backplane –
see Figure 6-18
. Ensure that the connectors are aligned properly and slowly push
the HPA into the backplane until it stops. At this point, the back side of the HPA front
panel should be flush with the HPA compartment frame.
5. Secure the HPA in place by tightening the 10-32 Phillips head captive screw (located at
the top of the HPA front panel) with a torque rating of 19.2 Inch Lbs. – see Figure
6-16
.
6. Place the magnetic plate at the bottom of the HPA front panel and tighten the 10-32
Phillips head captive screw with a torque rating of 19.2 Inch Lbs. – see Figure 6-16
.
Note: The magnetic plate must be installed in order for the HPA to power up later on.
7. Switch ON the HPA-L 5A circuit breaker, located on the BMS front panel.
8. Switch ON the LB HPA PSU circuit breaker (CB2), located on the PDU.
9. Using the LBE GUI, place the LB sub-system in transmit_only mode.
10. Close the HPA compartment front door and the electronics compartment front door.
SX03-10000-01-M01 6-31