Sun Microsystems 817-4054-15, Руководство по обслуживанию

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Chapter 13 Baseplane 13-3
Note – Completely remove the IB_SSC assembly is necessary in order to remove the
power distribution board.
14. Remove the power distribution board.
See Section 8.3.1, “Removing the Power Distribution Board” on page 8-6 .
15. Disengage and raise the following boards at least two inches above the system,
but do not completely remove them:
■
CPU/Memory boards
See Section 9.2.1, “Removing a CPU/Memory Board” on page 9-4 .
■
L2 Repeater boards
See Section 11.1.1, “Removing an L2 Repeater Board” on page 11-2 .
16. From beneath the system, loosen 30 of the 31 captive screws securing the
baseplane to the chassis (
FIGURE 13-2
). Leave the screw at the center of the front
secured.
Use a Phillips no. 2 short stubby (or 6-inch, 15 cm) screwdriver if the system is in a
low mounting location in the system cabinet.
17. Completely loosen the centerplane from the system.
There are two different baseplane designs:
■
With a plunger (release button) securing it at the front
■
Without a plunger
If a plunger is fitted, remove it when instructed to do so in Step 20 . The plunger
binds with CPU/Memory board, SB0, during installation and may cause connector
damage.
■
If the system does not have a plunger (release button), loosen the center front
screw (
FIGURE 13-2
). Keep one hand under the baseplane while loosening the
center front screw. Go to Step 18 .
■
If the system has a plunger (release button), with one hand, hold the baseplane up
and press in the plunger (release button) at the front of the chassis (
FIGURE 13-3
).
Caution –
The baseplane is heavy. Be ready to take its weight to prevent risk of
injury.