Hot-Swappable Power Supplies and Power Supply Fan Assemblies
Before performing these procedures, read “Safety Notices” on page xiii.
Notes:
1. The 10 EIA-unit I/O drawer has two power supplies. You can replace each supply
separately. The removal and replacement procedures are the same for each power
supply.
2. If only one power supply needs to be removed, you do not have to power off the
system.
3. Each power supply has a test switch. See “Power Supply Test Switch Procedure” on
page 515.
4. You need a 6-mm nutdriver to perform this procedure.
Removal
DANGER
Do not attempt to open the covers of the power supply. Power supplies are
not serviceable and are to be replaced as a unit.
Attention: Do not perform the hot-swap procedure for a power supply if the ambient
temperature is greater than 32°C(90°F), because it can cause loss of data or data
corruption.
Be sure that the replacement power supply is ready to install, because the 10 EIA-unit
I/O drawer can encounter problems if the power supply is removed for longer than five
minutes.
1. If you have not already done so, open the rear door of the rack unit and locate the
drawer you need to work on.
2. Unplug the power cord from the power supply.
3. Reposition any other cables necessary to allow the removal of the power supply.
4. Remove the screw from the center of the power supply handle and save it for
replacement.
5. Grasp the handle of the power supply and pivot it upward.
6. Pull the power supply out of the drawer.
7. Remove the external fan assembly from the power supply and save it for
replacement.
a. Use your fingernail to depress the tab on each plug, and pull to remove the two
fan cables from the front of the power supply.
516 Service Guide
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