Unique Broadband Systems Ltd. DRU1KW User Manual

 

 

Always ensure that the AC power to the HPA PSU mounting shelf has 
been switched OFF prior to removing the shelf.  This will prevent injury 

caused by electric shock and prevent damage to equipment. 

 
 
6.5.8.1 

 
A HPA PSU mounting shelf should be removed in the following sequence: 

 

1.  Open the electronics compartment front door for the corresponding sub-system. 
2.  Open the HPA compartment front and rear doors for the corresponding sub-system. 
3.  Using the HBE GUI or LBE GUI, place the corresponding sub-system in standby mode. 
4.  Switch OFF the HPA PSU circuit breakers, located on the HB cabinet PDU or LB cabinet 

PDU – please refer to section 2.3.4 or 2.3.5 for breaker designations. 

5.  Remove the rectifier modules from the corresponding HPA PSU mounting shelf - see 

section 6.5.7.1. 

6.  Disconnect the 6-pin pluggable AC terminal block from the HPA PSU mounting shelf 

rear panel – see Figure 6-14.  The pluggable terminal block can be removed from the 
HPA PSU mounting shelf rear panel by loosening the two (2) screws.  Do not remove 

the individual wires from the pluggable terminal block. 

7.  Disconnect the serial cables (

SX03-10924-02 and SX03-10924-01

) from the HPA PSU 

mounting shelf rear panel serial connectors J1 and J2 respectively – see Figure 6-14. 

8.  Remove the plastic cover, which shields the POS and RTN DC output terminals – see 

9.  Disconnect the two (2) positive conductors from the HPA PSU mounting shelf rear 

panel 1/4-20 POS terminals – see Figure 6-14. 

10. Disconnect the two (2) return conductors from the HPA PSU mounting shelf rear panel 

1/4-20 RTN terminals – see Figure 6-14. 

11. Disconnect the ground conductor from the HPA PSU mounting shelf rear panel 1/4-20 

GND terminal – see Figure 6-14. 

12. Remove the three (3) 10-32 socket head cap screws (with #10 lock washers and flat 

washers) which secure the HPA PSU mounting shelf to the HPA compartment frame – 
see Figure 6-12. 

13. Remove the HPA PSU mounting shelf from the HPA compartment frame and set it 

aside. 

 
 

 
 

 

SX03-20000-01-M01 6-29