Chapter 1
Overview
1-41
1.8
Service Information
Service and installation information is also available on service labels that are located
on the External I/O Expansion Unit top cover and on the dummy cards that are
shipped with new carriers.
TABLE 1-3
Service Information Summary
Topic
Comments
Access
• Service access to the External I/O Expansion Unit is from the
front or rear of the unit.
• The top cover is removable.
Air flow
• Air flow in the External I/O Expansion Unit is from front to
back.
• Fans are located in the power supply units. There are no
separate fans or fan trays.
• The PSU and I/O boat slots have pivoting metal flaps that drop
down to close the slots when a PSU or I/O boat is removed.
This prevents the loss of cooling air.
Mounting brackets
The External I/O Expansion Unit is mounted on fixed brackets.
Sliding brackets are not available for this product.
PCI card installation
• To avoid overheating of the External I/O Expansion Unit, cards
should be installed as quickly as possible.
• To prepare yourself to install a card within one or two minutes,
see
Section 1.3, “Carriers” on page 1-17
PCI cable removal
• When removing cables such as LAN cables, if you have
difficulty unlatching the connector, press the latch with a
flathead screwdriver to remove the cable.
AC cables and cords
• The internal AC cables (
) are not removable. If they
are damaged, replace the chassis.
• Each internal AC cable connects to only one PSU. Connect both
AC cables to AC power to ensure that both PSUs are
operational.
• The internal AC cables are not connected directly to AC voltage.
Use the AC power cords to connect the internal AC cables to AC
voltage.
• Do not use AC cables designed for other products with the
External I/O Expansion Unit.
Summary of Contents for SPARC Enterprise M4000
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