User's Manual Part 2

Chapter 6 Maintenance
6.5.4 Low Band Exciter (LBE) Replacement
Always ensure that the DC power to the LBE has been switched OFF prior
to removing the LBE. This will prevent injury caused by electric shock
and prevent damage to equipment.
6.5.4.1 LBE Removal
The LBE should be removed in the following sequence:
1. Open the electronics compartment front and rear doors.
2. Using the LBE GUI, place the LB sub-system in standby mode.
3. Switch OFF the LB HPA PSU circuit breaker (CB2), located on the PDU.
4. Switch OFF the HPA-L 5A circuit breaker, located on the BMS front panel.
5. Switch OFF the LBE 25A circuit breaker, located on the BMS front panel.
6. Switch OFF the LBE rear panel power switch.
7. Disconnect the wires/cables connected to the LBE rear panel.
8. Remove the two (2) Phillips pan head screws which secure the LBE to the mounting
brackets – see Figure 6-4
.
9. Remove the LBE from the electronics compartment and set it aside.
Figure 6-4 LBE Mounting Brackets with LBE
1) LBE Mounting Bracket (left side)
2) LBE Mounting Bracket (right side)
3) Mounting Screw Hole
4) LBE
5) XXX Screw
SX03-10000-01-M01 6-10