User's Manual Part 3

TME Power Distribution Assembly – continued
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 9-73
PRELIMINARY
Install PDA
Follow the procedure in Table 9-42 to install the PDA. See Figure 9-26
or Figure 9-28.
Table 9-42: Procedure to Install PDA
Step Action
1 Hold PDA near its slot in the TME and connect the cables (previously disconnected) to the rear of the
PDA.
2 Slide PDA in and secure to TME chassis by tightening the captive screws.
3 Place ground lug on ground studs of the PDA and secure using two M6 nuts and washers. Torque nuts
to 3.4 N–M (30 in–lbs).
4 Verify that circuit breakers are disengaged (pulled out or set to “O” position).
5 Verify that DC power source is OFF.
6 For –48 VDC PDA, connect DC power to the PDA using a screwdriver to tighten screws. Proceed to
step 7.
For +27 VDC PDA, connect power plug . Proceed to step 8.
7 Install DC power protective cap.
8 Turn on DC power.
9 On –48 VDC PDA, push in TME circuit breaker.
On +27VDC PDA, set switch to “1” position.
10 Push in 1U circuit breaker.
11 Notify operator that replacement is complete and verify that no new alarms have been generated and
that old alarms are cleared.
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