User's Manual

Internal Assembly Location and Identification
PRELIMINARY
1X SCt4812ET Lite BTS Optimization/ATP
08/01/2001
1-18
Internal Assemblies and FRUs
Figure 1-3 shows the location of the internal assemblies and Field
Replaceable Units (FRU). A brief description of each item is found in
the following paragraphs.
Figure 1-3: Internal Assemblies and FRUs
(Cabinet doors not shown for clarity)
LPAs
SCCP Fans
LPA Trunking
Module
RFDS
SCCP Shelf
Filter/Combiner
Shelf (Bandpass
filters shown)
ETIB
DRDC/TRDC
Shelf
CSU Shelf
MAP
Rectifiers
DC PDA
GFCI Utility
Outlet
LPAC
Back–up Batteries
(Heaters underneath batteries)
External
Blower
Assembly
SC4812ETL0002–4
ACLC
Span I/O
A
Span I/O
B
CSUs
ESD Grounding
Jack
1