Cold Replacement; Backplane Replacement; Overview Of The Bp - Fujitsu SPARC ENTERPRISE M9000 Service Manual

20
C H A P T E R

Backplane Replacement

This chapter explains the replacement procedure for backplanes (BPs). It covers the
following:
Section 20.1, "Overview of the BP" on page 20-1
■
Section 20.2, "Cold Replacement" on page 20-1
■
As a replacement method for BPs, only the cold replacement method can be used.
For the definition of the replacement method, see
Procedures" on page
20.1

Overview of the BP

This section provides an overview of the BPs and shows their mounting locations.
A BP has connectors for interconnecting replaceable units in a cabinet. The following
BPs are available:
BP_A: used for interconnecting the CMUs and IOUs of the M8000
■
BP_B: used for interconnecting the CMUs, IOUs, XBUs of the M9000
■
PSUBP: used for interconnecting power supply units (PSUs)
■
FANBP: used for interconnecting FAN units
■
20.2

Cold Replacement

BPs are mounted in a cabinet, and it is necessary to remove many other components
before it can be accessed. Consequently, active maintenance cannot be performed on
BPs. Cold replacement must be used when replacing them.
4-2.
Section 4.1, "Types of Replacement
20-1