User's Manual

Initial Power Up – continued

08/01/2001

2-17

1X SCt4812ET Lite BTS Optimization/ATP

PRELIMINARY

Power Removal Procedure

If it becomes necessary to remove power from the frame, follow the

procedure in Table 2-9.

Table 2-9: Power Removal

Step Action

1 Set all DC PDA circuit breakers to OFF (pulled out) in the following sequence:

– LPAs

– Pilot beacon

– Heat exchanger

– ETIB

– Options

– PS1 and PS2

– MAIN BREAKER #1 (Internal)

n WARNING

The surge capacitors in the DC PDA will store a large electrical charge for long periods of time.

Failure to discharge these capacitors as specified in this step could result in serious personal injury or

damage to equipment.

On the DC PDA, set the PS1 and PS2 circuit breakers to ON (pushed in), and wait at least 30

seconds.

3 Set the DC PDA PS1 and PS2 circuit breakers to OFF.

4 Set the MAP power switch to OFF.

5 Set all ACLC circuit breakers to OFF (down) in the following sequence:

– GFI

– HEATER

– RECT. 1/3

– RECT. 2/4

– MAIN

6 Set the facility circuit breaker controlling external power to the frame to OFF.