Digital Equipment StorageWorks UltraSCSI DS-BA370 Series, User Manual

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Power Distribution
UltraSCSI RAID Enclosure 6–11
Replacing a Power Supply
___________________ Caution _____________________
To protect this sensitive electronic device from electrostatic
discharge (ESD) use the following precautions—(1) Wear an
ESD wrist strap. (2) Do not touch the printed circuit board or
the backplane connector. (3) Do not lay the device on a work
surface but place it on an electrostatic mat. (4) Place the device
in an electrostatic bag for shipment.
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The basic procedure for removing and replacing shelf power supplies is the
same as for replacing disk drives. Normally you can replace one shelf power
supply without removing power from the enclosure.
There are two methods for replacing shelf power supplies—the hot swap
method and the cold swap method. Use the LEDs on the front of the SBB
that indicate the status, either operational or non-operational, to determine
the swap method to use.
•
Normally use the hot swap method
•
The cold swap method is normally used only during initial installation.
This requires removing the power from the UltraSCSI RAID enclosure
and all devices are inactive.
Complete the procedures in Table 6–2 and Table 6–3 to replace a shelf
power supply:
___________________ Caution ____________________
To prevent ESD (electrostatic discharge) damage to an SBB, do
not touch the SBB connector.
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