Chapter 5: Subsystem Maintenance and Upgrading
Replacing Controller Module Components
5-3
5.2.2 Notes on Controller Module Maintenance
•
GALAXY HDX2 is a single-controller model subsystem;
therefore, it is necessary to power down the subsystem to remove
the controller. When replacing a DIMM or the controller itself, the
whole subsystem needs to be powered down. You should carefully
select the time when the replacement will be made in order to
minimize the overall disruption to service
.
•
The controller module contains a DDR RAM DIMM module.
When replacing the controller module, the DIMM module must be
removed from the old controller module and it can be reinstalled
onto the new controller module.
•
When replacing the controller module, always remember that the
controller board is one of the most sensitive components in the
GALAXY HDX2. All previously stipulated safety precautions (see
Section 2.3
) must be strictly adhered to. Failure to adhere to these
precautions can result in permanent damage to the controller board,
resulting in lengthy delays for the end user.
•
For your own safety and that of the subsystem, make sure that no
power is being supplied to the system prior to replacing the
controller module.
5.2.3 Removing the Controller Module
To remove the controller module:
Step 1.
Turn off the subsystem
. If possible
power off
the subsystem in
the way described in
Chapter 4
. If it is not possible to do this,
turn off
both PSU modules.
Step 2.
Disconnect all cables
from the controller module. These include
the Ethernet cable connected to the Ethernet port, and any cables
connected to the COM ports.
Step 3.
Remove the screws
on the levers at the back of the controller
module. (See
Figure 5-1
)
