User's Manual Part 2

Pre–Power Up Test (Indoor) – continued

5-6 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004

PRELIMINARY

Table 5-6: cCLPA DC Pre–Power Test

Step Action

1 Ensure that DC power is disengaged at the source. Verify that the DC power cable has been connected

using the procedure in Table 4-8.

2 Remove I/O panel cover.

3 At the bottom of the cCLPA, verify that 20 A circuit breaker to OFF (pulled out). See Figure 5-4.

4 Us a DMM (set to ohms) and verify the resistance on the –48V or +27 V bus.

– Verify that the resistance from the power (+) feed terminal with respect to ground measures > 500

– Verify that the resistance from the power (–) feed terminal with respect to ground measures > 500

The resistance measurement should not read 0 (zero).

5 Proceed to Initial Power up procedure in Table 5-11.

ti–cdma–wp–00298–v01–ildoc–ah

20A FUSE

Figure 5-4: Bottom View of cCLPA