Power Distribution Board; Removing The Power Distribution Board - HP 9000 rp4410 User's & Service Manual

Power Distribution Board

The power distribution board is attached to the rear power supply cage, underneath the hot-swappable power
supply fan unit.
WARNING Ensure that the system is powered off and all power sources have been disconnected
from the server before 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 can result in personal injury or damage to
equipment.
CAUTION Failure to properly complete the steps in this procedure results in erratic system behavior or
system 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 can 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 server out from the rack until it stops. (See "Accessing a Rack-Mounted
Server" on page 177.)
Step 2. Remove the top cover. (See "Removing the Top Cover" on page 182.)
Step 3. Remove the power supply fan unit from the chassis. (See "Removing a Hot-Swappable Chassis Fan
Unit" on page 203.)
Step 4. Remove the hot-swappable power supplies from the chassis. (See "Removing a Hot-Swappable
Power Supply" on page 259.)
Step 5. Unplug the power cable and the signal cable from the midplane riser board.
Step 6. Unplug the QuickFind diagnostic board cable.
Step 7. Using a Torx 15 driver, loosen the one T-15 screw attaching the power distribution board to the
chassis. (Figure 6-53)
Step 8. Push the power distribution board towards the center of the chassis to release it from the keyway
slots. Pull it off the keyway slots and up and out of the chassis.
Chapter 6
Removing and Replacing Components

Power Distribution Board

261