User's Manual Part 2

Chapter 6 Maintenance
6.5.3 High Band Exciter (HBE) Replacement
Always ensure that the DC power to the HBE has been switched OFF
prior to removing the HBE. This will prevent injury caused by electric
shock and prevent damage to equipment.
6.5.3.1 HBE Removal
The HBE should be removed in the following sequence:
1. Open the electronics compartment front and rear doors.
2. Using the HBE GUI, place the HB sub-system in standby mode.
3. Switch OFF the HB HPA PSU circuit breaker (CB1), located on the PDU.
4. Switch OFF the HPA-H 5A circuit breaker, located on the BMS front panel.
5. Switch OFF the HBE 10A circuit breaker, located on the BMS front panel.
6. Switch OFF the HBE rear panel power switch.
7. Disconnect the wires/cables connected to the HBE rear panel.
8. Loosen the four (4) knurled screws which secure the HBE to the mounting brackets –
see Figure 6-1
.
9. Remove the HBE from the electronics compartment and set it aside.
Figure 6-1 HBE Mounting Brackets with HBE
1) HBE Mounting Bracket
2) Knurled Screw
3) HBE
SX03-10000-01-M01 6-7