Sun Microsystems 5500, Reference Manual

Page: 75 / 304

Chapter 4 I/O+ Boards and Components 4-17
4.5.4.1 Nylon Standoffs
Nylon standoffs lock the SBus and graphics (UPA) cards to the I/O+ boards
(
FIGURE 4-14
).
■
To unlock a standoff, pull up the tip insert.
■
To lock a standoff, first ensure that the module or card rests on the standoff
flange, then press down the tip insert.
FIGURE 4-14
Locking and Unlocking Standoffs
4.5.4.2 Removing an SBus Card
1. Use the procedures in Section 4.5.2 “Removing a Board,” to remove the applicable
I/O+ board.
2. Use
FIGURE 4-12
to locate the card to be removed.
3. Remove the two screws that secure the SBus card to the back panel.
Save the screws for installation of a replacement SBus card or a filler panel.
4. Unlock the SBus card by pulling up the tips of the two standoff (
FIGURE 4-14
).
5. Hold the card by the edges near the connector and gently rock the card back and
forth to loosen it from the socket.
You may have to remove the SBus cards or the FFB card next to this card in order to
have enough room to hold onto the SBus card being removed.
Caution – The connector housing may break if the SBus card is tilted too far.
6. Lift the SBus card from the socket at an angle while guiding the face plate out
from the back panel opening (
FIGURE 4-15
).
Unlocked Locked
Tip insert
Flange