Oracle Sun Fire X4240, Руководство по обслуживанию

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1-4 Sun Fire X4240 Server Service Manual • September 2010
1.2.1 Infrastructure Boards
The
Sun Fire X4240
has the following boards installed in the chassis. The boards are
listed in
TABLE 1-2
.
TABLE 1-2
Infrastructure Boards
Board Description Reference
Motherboard
FRU The motherboard includes processor modules, slots for 16
DIMMs, memory control subsystems, and the service processor
(iLOM) subsystem.
The service processor (integrated LOM) subsystem controls the
host power and monitors host system events (power and
environmental). The integrated LOM controller draws power
from the host’s 3.3V standby supply rail, which is available
whenever the system is receiving AC input power, even when
the system is turned off. Section 4.6, “Servicing
the Motherboard
Assembly” on page 4-27
Refer to the Sun Fire
4140, 4240 and 4440
ILOM Supplement for
iLOM sensor
information.
Power
distribution board
FRU This board distributes main 12V power from the power supplies
to the rest of the system. It is directly connected to the paddle
card, and to the motherboard via a bus bar and ribbon cable. It
also supports a top cover interlock (“kill”) switch.
In the Sun Fire X4240, the power supplies connect directly to the
power distribution board. Section 5.5, “Servicing
the Power Distribution
Board (PDB)” on
page 5-14
Paddle card
FRU This board serves as the interconnect between the power
distribution board and the fan power boards, drives backplane,
and I/O board. Section 5.7, “Servicing
the Paddle Card” on
page 5-19
Fan power boards
(2)
FRU These boards carry power to the system fan modules. In
addition, they contain fan module status LEDs, and transfer I
2
C
data for the fan modules.
Section 5.1, “Servicing
the Fan Power Boards”
on page 5-2
Drives backplane
FRU This board includes the connectors for the drives, as well as the
interconnect for the I/O board, Power and Locator buttons, and
system/component status LEDs. The Sun Fire X4240 has a
16-disk backplane. Each drive has an LED for power/activity,
fault, and ok-to-remove. Section 5.3, “Servicing
the Hard Drive
Backplane” on page 5-10
Front I/O board
FRU This board carries the front panel USB connections from the
drives backplane. The board connects directly to the drives
backplane. It is packaged with the DVD drive as a single unit. Section 3.5, “Servicing
the DVD/USB Module”
on page 3-20
PCIe risers
FRU In the Sun Fire X4240, each riser supports two PCIe cards. There
are three risers per system, each attached to the rear of the
motherboard. Section 4.3, “Servicing
PCIe Risers” on
page 4-15