For Service Technician Only: Replacing The Power Distribution Board - Lenovo ThinkServer RD650 User Manual And Hardware Maintenance Manual

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to "Completing the parts replacement" on page 193.

For service technician only: replacing the power distribution board

Attention: This procedure must be performed only by trained service personnel of Lenovo. Do not open your server or
attempt any repair before reading and understanding "Safety information" on page iii and "Guidelines" on page 67.
CAUTION:
Hazardous moving parts. Keep fingers and other body parts away.
CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.
Hazardous voltage, current, and energy levels are present inside any component that has this label
attached. There are no serviceable parts inside these components. If you suspect a problem with
one of these parts, contact a service technician.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Note: Use any documentation that comes with the new power distribution board and follow those
instructions in addition to the instructions in this topic.
To replace the power distribution board, do the following:
1. Remove all external media from the drives and turn off all attached devices and the server. Then,
disconnect all power cords from electrical outlets and disconnect all cables that are connected to
the server.
2. Prepare your server. See "Removing or extending the server from the rack cabinet" on page 69.
3. Remove the server cover. See "Removing the server cover" on page 69.
4. Disconnect the power cables from the power distribution board.
5. Remove the cooling shroud. See "Removing and reinstalling the cooling shroud" on page 72.
6. Remove the system fan cage with system fans. See "Removing and reinstalling the system fan cage"
on page 77.
7. Record the component locations, cable connections, and cable routing in the server.
.
Chapter 6 Replacing hardware
189