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S e r v i c e I n f o r m a t i o n
Removing
1.
It is vitally important to ensure that the system is shut down, the
battery pack circuit breaker switch is in the Off position and the
system is disconnected from the mains electricity supply.
2.
If necessary, remove some of the expansion cards to improve access
to the bus bars, which provide power to the motherboard. You may
also need to unplug some of the data cables which are connected to
the hard disk drive modules.
Caution
If you remove any hard disk SCSI controller card or cables, you must remember the
exact cable and connector arrangment of your hard disks, particularly if you are
using a RAID (Redundant Array of Independent Disks) configuration. If you fail to
restore the arrangement so that all cables and plugs are as they were originally, you
will lose all the data on your hard disks .
3.
Remove the motherboard cooling fan assembly.
4.
Detach two pairs of motherboard bus bars and remove the set of 3
bus bars under the cooling fan assembly as shown in the following
diagram:
Figure 4-58 Bus Bars
1.
Motherboard Bus Bars
Make sure that there is enough clearance between the bus bars and
their power supply connections to allow the unit to slide freely. If
there is not enough clearance, you will need to remove the
motherboard and then the bus bars themselves. The bus bars are
4-60 OWNER'S HANDBOOK
1
2.
Bus Bars for Hard Disk
Power Distribution Panel
2
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