User's Manual

Full Unit Replacement Procedures continued
JAN 2002
8-23
SC300 1X BTS Hardware Installation, ATP, and FRU Procedures
DRAFT
Table 8-14: Procedure to Remove the Failed Unit
Step Action
3 If DC power is being supplied to the unit or if battery backup is present, open (pull) the DC power
breaker. The white collar on the breaker is visible when the breaker is opened.
4 If AC power is being supplied to the unit, open (pull) the AC power breaker. The white collar on
the breaker is visible when the breaker is opened.
5 Turn the power off at the main power source (AC and/or DC).
6 Use a T30 TORX tamper bit to remove the two tamperresistant screws that hold the site I/O
junction box (or site I/O cap) to the BTS. Refer to Figure 8-4 in the Site I/O Junction Box
Replacement procedure.
7 Disconnect the AC input cable from the unit. Refer to NO TAG.
8 Disconnect the DC input cable from the unit. Refer to NO TAG.
9 Disconnect the antenna cable(s) from the unit. Refer to NO TAG.
10 Disconnect the MIB cables from the unit (if equipped). Refer to NO TAG.
11 Disconnect the SU cables from the unit (if equipped). Refer to NO TAG.
12 Remove the two mounting screws that hold the short duration battery (if present) to the unit.
Refer to Table 8-8 in the Short Duration Battery Replacement Procedures procedure and
NO TAG.
13 Attach the installation handles to the unit. Refer to the Attaching Installation Handles to the
Unit procedure in Chapter 6.
14 Use a T30 Tamper bit to remove the two screws that hold the unit to the mounting bracket.
15 Remove the pin or lock (if equipped) from the unit.
16 Remove the unit from the mounting bracket.
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