Instruction Manual

Initial Power Up – continued
DRAFT
SC4812ET BTS Optimization/ATP — CDMA LMF
Apr 2001
2-8
Table 2-6: DC Power Pre–test (BTS Frame)
Step Action
7 Set the 8 LPA breakers ON by pushing them IN one at a time. Repeat step 3 after turning on each
breaker.
 A typical response is that the ohmmeter will steadily climb in resistance as capacitors charge,
stopping at approximately 500
Ω..
8 Seat all LPA and associated LPA fan modules into their associated slots in the shelves one at a time.
Repeat step 3 after seating each LPA and associated LPA fan module.
 A typical response is that the ohmmeter will steadily climb in resistance as capacitors charge,
stopping at approximately 500
Ω..
9 Seat the Heat Exchanger, ETIB, and Options breakers one at a time. Repeat step 3.
RF Cabinet Power Up
Table 2-7 covers the procedures for properly powering up the RF
Cabinet.
Table 2-7: RF Cabinet Power Up
Step Action
1 Ensure the 400 Amp Main DC breaker and all other breakers in the RF Cabinet are OFF.
2 Proceed to the DC Power Pre–test (BTS Frame) sequence (see Table 2-6) (for initial power–up as
required).
3 Ensure the power cabinet is turned on (see Table 2-5). Verify that 27 volts is applied to the terminals
on the back of the RF cabinet.
4 Engage the main DC circuit breaker on the RF cabinet (see Figure 2-5).
5 On each RF cabinet:
 Set C–CCP shelf breakers to the ON position by pushing them in one at a time (labeled
C–CCP 1, 2, 3 – located on the power distribution panel).
 Set LPA breakers to the ON position by pushing them in one at a time (8 breakers, labeled 1A–1B
through 4C–4D – located on the power distribution panel).
 Set the two heat exchanger breakers to the ON position by pushing them in one at a time.
 Set the ETIB breaker to the ON position by pushing it in.
 Set the OPTION breaker to the ON position by pushing it in.
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