Power Distribution Board Assembly
Before performing these procedures, read “Safety Notices” on page xiii.
Attention: Note the bay locations of all disk drives in each bank before you attempt to
remove them from the drawer.
Removal
1. Perform the procedure in “Powering Off the System” on page 492.
2. Open the I/O rack doors.
3. Remove the power supplies, as described in “Hot-Swappable Power Supplies and
Power Supply Fan Assemblies” on page 516.
4. Do the steps in “I/O Tray” on page 513 that allow you to move the I/O tray a few
inches to the rear. Leave the internal cables connected to the I/O planar and
installed adapters.
5. Place the drawer in the service position, as described in “Service Position” on
page 512.
6. Remove the screws that attach the front drawer cover and remove the cover.
7. Note the locations and then disconnect the cables attached to the fan monitor
control card.
8. Remove the lower air baffle by loosening the captive screw and then lifting the
baffle up and out of the drawer.
Note: It is not necessary to remove the fan monitor control card from the lower air
baffle to remove it from the drawer.
9. Note the locations of the cables that attach to the power distribution board, and
then disconnect the cables.
10. Remove the six screws that hold the power distribution board in place.
Note: If cables running between the front and rear sections of the drawer interfere
with removal of the power distribution board, note their locations and
disconnect them before lifting the power distribution board out of the drawer
in the next step.
11. Remove the power distribution board by lifting the right side up and pulling it out.
Chapter 9. Removal and Replacement Procedures 519
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