Replacing the Guard Mode Switch Board
4-66 72A-1230 Rev. F
July 22, 2005
Replacing the Guard Mode Switch Board
Note the location of the Guard Mode Switch Board in Figure 4.24
on page 4-49 and in Figure 4.34 below. Take the following steps to replace it:
1. If it has not already been done, remove the card cage cover. See
”Removing the Card Cage Cover” on page 4-48. The Guard Mode Switch
Board will be visible as in Figure 4.34.
Figure 4.34 Guard Mode Switch Board
NOTE Do not remove the replacement board from its anti-static bag until
instructed to do so.
2. Detach the two ribbon cables (W8 and W12) from the board.
3. Detach the four cables (W9, W11, W13, and one unlabeled for future use)
from the board.
4. Use your index fingers to unlatch both PC board extractors. Then, pull the
board straight up.
connectors, lowvolt. power supply
Guard Mode Switch Board
W8 Connector
W11 Connector
W9 Connector
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