Sun Microsystems SPARC Series, Service Manual

Page: 93 / 192

6-1
C H A P T E R
6
Motherboard Unit Replacement
This chapter explains how to replace the motherboard unit.
■
Section 6.1, “Accessing the Motherboard Unit” on page 6-4
■
Section 6.2, “Removing the Motherboard Unit” on page 6-7
■
Section 6.3, “Mounting the Motherboard Unit” on page 6-8
■
Section 6.4, “Reassembling the Server” on page 6-9
The motherboard unit is a cold replacement component. The server must be
completely powered off, the power cords must be disconnected, and all DIMMs and
PCIe cards must be removed, before the motherboard unit is replaced. See
Chapter 7 ,
Replacement and Installation of Memory and Chapter 8 , Replacement and
Installation of PCIe Cards.
Note –
There are two types of motherboard units for the M3000 server: the
motherboard unit mounted with the CPU consisting of two-core processors and the
motherboard unit mounted with the CPU consisting of four-core processors. When
replacing a motherboard unit, the replacement unit must contain the same type of
processor. For example, do not replace a motherboard unit that has two-core
processors with one that contains four-core processors.
Note – Do not replace the motherboard unit and the operator panel at the same
time. Otherwise, the system may not operate correctly. Use the
showhardconf
command or
showstatus
command to verify that the replacement unit of the first
replaced FRU is fully operational, before replacing the other FRU.
Note – When replacing the motherboard unit, attach connection destination labels
to each of the LAN cable and UPS cable connected to the XSCF unit before removing
these cables.