Service Manual

Removing and Replacing Parts 4-27
SEC Cartridge and Heat Sink Assembly
To remove an SEC cartridge and heat sink assembly, follow these steps:
WARNING: The SEC cartridge and heat sink assembly can get
extremely hot during system operations. Be sure that it has had
sufficient time to cool before touching it.
WARNING: When handling the SEC cartridge and heat sink assem-
bly, take care to avoid sharp edges on the heat sink.
1. For the unit to be removed, press outward on the two SEC car-
tridge release latches until they snap into the open position (see
Figure 4-23).
Figure 4-23. SEC Cartridge Release Latches
2. Pull the SEC cartridge straight up out of the connector and guide
bracket assembly (some force may be required).
To replace an SEC cartridge, make sure the cartridge release latches are in the
open position, orient the new SEC cartridge in the guide bracket assembly as
shown in Figure 4-23, seat it firmly, and then snap the release latches back into
place.
To install an SEC cartridge where there was none before, you will need to
remove the installed terminator cartridge (see the next subsection, “Termina-
tor Cartridge”).
heat sink
SEC cartridge
guide bracket
assembly
release latches (2)