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1.2.5.1
Computing Module Replacement
1.
Remove the pre-patch panel to expose the computing
component modules.
Remove the two Phillips head re-
taining screws from the top and bottom of the module
to be removed (Figure 1.9a).
2.
Insert the special module extraction tool on the ends
of the tray (Figure 1.9b).
Pull the tray forward,
removing it from the computer.
3.
Place the new component in place; be sure the guide
pins are properly seated in the guide-pin holes before
mating the connectors to the rear of the module.
4.
Check that the module is properly installed (connector
firmly mated, etc.,) and replace the two retaining
screws.
1.2.5.2
Patching Block Replacement
1.
The patching blocks of the computing components are
held securely in place by the retaining strips on the
front of the pre-patch panel (Figure 1.IOa).
2.
The retaining strip above or below the patching block
may be removed to change blocks.
The retaining strip
is released by removing the four screws directly be-
hind the strip on the rear of the pre-patch panel
(Figure 1.lOb).
If blocks on two adjacent horizontal
rows are to be replaced, remove only the retaining
strip between the two rows.
The patching blocks can
then be removed from the rows above and below the strip.
3.
Once the retaining strip is free, remove the original
patching block and replace it with the new block
(Figure 1.10b).
Secure the retaining strip with the
four screws.
The pre-patch panel is now ready for
problem patching.
NOTE
Failure to change the patching block
when computing components are changed
may prevent proper operation because
of the arrangement of the jumpers on
the rear of the patching block.
1-11
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