User's Manual Part 3

RF Filter Tray – continued

9-56 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004

PRELIMINARY

To perform the following procedure, the BTS must be

removed from the Mounting Plate.

NOTE

Table 9-30: Preparation Procedure for Removing the Filter Tray

Step Action

1 Notify operator that the Filter Kit replacement procedure is starting and that alarms can be expected.

2 Perform the Site Shutdown procedure in Table 10-2.

3 Remove 3 M6 screws and washers securing BTS to Mounting Plate.

n WARNING

By pulling out the circuit breaker, power to the BTS will be interrupted, causing the BTS to go off

line.

4 Disengage DC power to the BTS by pulling out the 20 A breaker at the rear of the BTS.

5 If possible, turn off DC power at the source. Verify that DC Power source is OFF.

6 Disconnect all cabling to the BTS.

7 Remove BTS from Mounting Plate and place on a stable, flat surface.

8 Put on an ESD wrist strap or other approved grounding device.Ensure wrist strap is properly

grounded. Do not ground to BTS chassis.

9 If not already done, remove BTS front cover panel by grasping finger grooves at the top and bottom

and pulling.

10 Pull out all the circuit cards and modules.

11 If not already done, remove HSO Module cover panel by turning latch, gently pulling it open, and

sliding it out towards the right. The panel has a flange that fits into a slot in the chassis.

12 Reach fingers in along the right side and feel for the clip that holds on the lower front right side vent

panel, and pop out the panel.

13 Using the hole left by the front right side vent panel, reach fingers in along the divider and press on

the clip holding the rear right side vent panel and pop it out.

14 If the BTS is equipped with Filter Tray Kit SGLF4152, proceed to Table 9-31.

If the BTS is equipped with Filter Tray Kit SGLN6223, proceed to Table 9-35.

If the BTS is equipped with Filter Tray Kit SGLN6222, proceed to Table 9-37.

Filter Tray Kit SGLF4152

Removal Procedure

Follow the procedure in Table 9-31 to remove the Filter Tray.