HP Integrity rx4640, User'S & Service Manual

Page: 100 / 197

Chapter 4
Removing and Replacing Components
Removing and Replacing the Power Distribution Board
100
Removing and Replacing the Power Distribution Board
These procedures detail how to remove and replace the power distribution board in the server. The power
distribution board is attached to the rear power supply cage, underneath the hot-swap power supply fan unit.
WARNING Ensure that the server is powered down and all power sources have been
disconnected from the server prior to removing or replacing the power distribution
board.
Voltages are present at various locations within the server whenever an ac power
source is connected. This voltage is present even when the main power switch is in
the off position.
Failure to observe this warning could result in personal injury or damage to
equipment.
CAUTION Failure to properly complete the steps in this procedure results in erratic server behavior or
server failure. For assistance with this procedure contact your local HP Authorized Service
Provider.
Observe all ESD safety precautions before attempting this procedure. Failure to follow ESD
safety precautions could result in damage to the server.
Removing the Power Distribution Board
To remove the power distribution board, follow these steps:
Step 1. If rack mounted, slide the HP server out from the rack until it stops. See “Extending the Server
from the Rack” on page 39.
Step 2. Remove the top cover. See “Removing the Top Cover” on page 43.
Step 3. Remove the power supply fan unit from the chassis. See “Removing a Hot-Swap Chassis Fan Unit”
on page 63.
Step 4. Remove the hot-swap power supply(s) from the chassis. See “Removing a Hot-Swap Power Supply”
on page 98.
Step 5. Unplug the power cable and the signal cable from the midplane riser board.
Step 6. Using a torx #15 driver, loosen the one torx screw attaching the power distribution board to the
chassis.