User's Manual Part 2
Chapter 6 Maintenance
15. Close the HPA compartment rear door and the electronics compartment front door.
6.5.14 7/8” Independent Output Coupler/RF Detector Replacement
Open or loose RF connections during operation may cause electric arcs
that can cause burns and eye injuries, as well as damage equipment.
Always ensure that the LB sub-system has been placed in standby mode
and DC power to the LB HPA has been switched OFF.
6.5.14.1 7/8” Independent Output Coupler/RF Detector Removal
The 7/8” independent output coupler/RF detector should be removed in the following
sequence:
1. Open the electronics compartment front door.
2. Open the HPA compartment rear 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. Disconnect the transmission line or jumper cable from RF Output Port 2 by removing
the three (3) 1/4-20 hex head bolts (with 1/4” flat washers and lock washers) if a
rigid cable is used.
6. Disconnect the RF cable (SX03-10908-07) from the independent output coupler/RF
detector forward coupling port – see Figure 6-19
.
7. Disconnect the serial cable (SX03-10904-01) from the independent output coupler/RF
detector serial port – see Figure 6-19
.
8. Loosen the pipe clamp, which is fitted around the independent output coupler/RF
detector output connector and the 7/8” EIA flange to 7/8” unflanged adapter – see
Figure 6-19
.
9. Remove the four (4) 10-32 socket head cap screws (with #10 lock washers) which
secure the 7/8” EIA flange to 7/8” unflanged adapter to the back of the cabinet – see
Figure 6-19
.
10. Using two hands, carefully pull the 7/8” EIA flange to 7/8” unflanged adapter from the
back of the cabinet and set it aside.
11. Loosen the pipe clamp, which is fitted around the independent output coupler/RF
detector input connector and 7/8” unflanged rigid waveguide – see Figure 6-19
.
12. Using two hands, carefully pull the independent output coupler/RF detector from the
7/8” unflanged rigid waveguide and set it aside – see Figure 6-19
.
SX03-10000-01-M01 6-42