User Service Guide, Fourth Edition - Server Expansion Unit

Chapter 5
Removal and Replacement
Removing and Replacing the Top Cover
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CAUTION An intrusion switch is located under the top cover on the chassis directly behind the
top front lip. After the front edge of the cover clears the chassis, lift the cover up and
away from the chassis top to ensure that the cover does not snag the switch when you
remove it.
Failure to clear the intrusion switch with the cover top may break it, thereby
breaking the electrical circuit that allows the SEU to operate.
Figure 5-4 Removing the Top Cover
Step 3. Lift the cover up and away from the chassis.
Replacing the Top Cover
Step 1. If the top cover is to be replaced, visually inspect the replacement part for proper number and
revision.
Step 2. Angle the rear of the top cover up and set the front down on the chassis directly in front of the
chassis lip under which the cover rests. Ensure that the intrusion switch is cleared so that it will
not break. Gently lower the cover to engage the intrusion switch and slide the cover into position. A
slow, firm pressure forward will be needed to properly seat the cover.
Step 3. Tighten the retaining screws securing the cover to the chassis.