Installing Components
7750 SR-a4 and SR-a8 Installation Guide 115
Step 1. Remove the IOM-a from the packaging and place it on a flat antistatic work surface.
Do not touch the printed circuit board or connector pins. Hold the IOM-a by the
edges.
Step 2. Move the ejector levers to the open position (Key 4 in Figure 38).
Step 3. Locate the IOM-a slot (Slot 3) on the chassis, and align the card with the slot guide
(Key 1 in Figure 38).
Step 4. Slide the card inward until the captive screws align with the threaded receptacle in
the chassis (Key 2 in Figure 38), and the connectors are seated in the backplane.
Step 5. Push the ejector levers simultaneously inward to complete the seating and to lock
the connectors and IOM-a in place.
The faceplate must be flush with the front of the chassis. If an ejector lever does not
shift to the locked position, the IOM-a is not seated correctly. Pull the card out,
reinsert it, then shift the levers to the locked position.
Step 6. Use a torque driver to tighten the captive screws (Key 3 in Figure 38). The
recommended torque is 4 to 5 lbf-in (0.45 to 0.56 N
.
m). Do not over-tighten. The
ejector levers must remain in the locked position while the card is installed in the
chassis.
Step 7. For the 7750 SR-a8, repeat these steps to install the second IOM-a in slot 6 on the
chassis.
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