Unique Broadband Systems Ltd. DRU1KW User Manual
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
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 HB cabinet 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 breakers (CB1, CB2, CB3 and CB4), located on
2. Using the HBE GUI, place the HB sub-system in standby mode.
3. Switch OFF the HB HPA PSU circuit breakers (CB1, CB2, CB3 and CB4), located on
the HB cabinet PDU front panel.
4. Switch OFF the TSC-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 –
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 –
9. Remove the HBE from the HB cabinet electronics compartment and set it aside.
Figure 6-1 HBE Mounting Brackets with HBE
1) HBE Mounting Bracket
2) Knurled Screw
3) HBE
2) Knurled Screw
3) HBE
SX03-20000-01-M01 6-12