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Removal/Replacement Procedures
Power Supply
4
!
Caution
Removal
4-6
The power supply module (Figure 5-3) is installed at the right side
of the drive bays in the XR900 chassis. The power supply receives
–48Vdc or 115/230Vac input power directly through its back panel.
The power supply outputs are cabled to the cooling fan and to a
backplane connector, which applies operating voltages from the
power supply to the mass storage modules.
Removal of a power supply module involves exposure
to high voltages. Avoid touching the connectors. Allow
one minute for the capacitors in the power supply to
discharge.
The suggested procedure for removal and replacement of the
XR900 power supply module is as follows:
1. Switch the power supply of the host system to
2. Disconnect the input power source from the XR900 chassis:
– If the power supply is an AC unit, unplug the power cord
from the AC outlet (the other end of the cord disconnects
automatically when you remove the module from the
chassis).
– If the power supply is a DC unit, turn off the –48Vdc
power source and unplug the DC connector from the
power supply input.
3. Remove the XR900 bezel, if installed.
4. At the upper right corner of the power supply module, loosen
the captive screw that holds the module in the chassis.
5. Slide the module out.
.
STANDBY
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