User Manual

Information Ov erview Chapter 1: Ov erview

• Chapter 6: S SI Replacement Procedures

S SI (Site Span I/O) Module

Unbalanced E1 Daughter Card

QHSO (Quartz High Stability Oscillator)

• Chapter 7: XMI Replacement Procedures

XMI (Transceiver Module Internal) Module

XMI F an Tray Assembly

• Chapter 8: DMI Replacement Procedures

DMI (Digital Module Internal) Assembly

Modem Boards

• Chapter 9: PDU Replacement Procedures

P ower Distribution Unit (PDU)

Breaker Module Assembly (BMA)

• Chapter 10: PSM Shelf Replacement Procedures

–48 V DC P ower Supply Module (PSM) Shelf

220 V AC P ower Supply Module (PSM) Shelf

P ower Supply Modules (PSMs)

• Chapter 11: RX Splitter Replacement Procedure

• Chapter 12: RGPS Head Replacement Procedure

Each BTS FRU procedure section contains the following information:

• Description - contains general information about the FRU operation, usage and location in

the frame/shelf and so on.

• System impact/considerations - describes how the replacement procedure impacts the

system with respect to downtime and so on. It lists speciﬁc concerns associated with the

replacement of the FRU .

• Required items - lists items that are required to perform the FRU procedure including

reference documents (manuals), tools, torque requirements, and replacement unit.

• Prerequisite - highlights actions needed before and after the FRU replacement including:

coordinating the replacement procedure with the OMCR operator and so on.

• Replacement procedure - provides detailed procedural steps to remove the failed FRU

and install the replacement FRU including: site preparation, equipment disassembly and

reassembly , equipment and site operation restoration and so on. When necessary , the

procedural steps reference speciﬁc procedures to be performed by the OMCR operator .

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FOA SEP 2007