User's Manual

Chapter 6 Maintenance

SX03-20000-01-M01 6-40

6.5.11.2 Fan Box Installation

he replacement fan box should be installed in the following sequence:

1. Before the replacement fan box is installed, ensure that the weatherproof gasket is

placed on the top of the cabinet where the fan box will be installed – see Figure

6-26

2. Using two handlers, one located on each side of the cabinet, carefully lift the fan box

and place it over the opening in the top of the cabinet.

3. Replace the eight (8) 1/4-20 socket head cap screws (with 1/4” lock washers and flat

washers) which secure the fan box to the cabinet – see Figure 6-25

. A torque rating

of 45.6 Inch Lbs. must be used to tighten the screws.

4. Route the fan box AC power cables to the HPA compartment frame backplane and

secure the AC power cables to the cable tie mounts located in the cabinet – see

Figure 6-24

5. Re-connect the fan box AC power cables to the FAN 1 / FAN 2 or FAN 3 / FAN 4 panel

mount connectors located on the HPA compartment frame backplane – see Figure

6-23

6. Using two handlers, one located on each side of the cabinet, carefully lift the cabinet

hood and place on top of the cabinet hood stands.

7. Secure the top hood in place by replacing the four (4) lifting eyes – see Figure 6-22

8. Switch ON 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.

9. Using the HBE GUI, place the HB sub-system in broadcast mode or, using the LBE

GUI, place the LB sub-system in transmit_only mode.

10. Close the HPA compartment rear door and the electronics compartment front door.