20 Replacing the Chassis Interface (CI) Board in the Cisco 7500 Series Chassis
Replacing the CI in the Cisco 7507
Installing the New CI
When you install the new CI, hold it in the vertical orientation shown in Figure 12, with the
connector along the edge of the CI facing the CI backplane connector. Both CI connectors are keyed
so you cannot install the CI incorrectly; however, to prevent damage to the connector pins, determine
the correct connection orientation before you install the CI.
Follow these steps to replace the CI:
Step 1
Attach an ESD-preventive strap (your own or the one supplied with the FRU) between you
and an unpainted chassis surface.
Step 2
Attach the CI’s connector to the CI connector on the backplane via the edge connector on
the CI board. If the edge connector’s keys are aligned, the CI should attach to the backplane
connector with a moderate amount of force. Do not force the CI into the CI connector onto
the backplane connector.
This completes the CI replacement procedure for the Cisco 7507.
Replacing the Front Chassis Panels
To replace the front panels, perform the following steps:
Step 1
Grasp the sides of the top panel with both hands. (See Figure 13a on page 21.)
Step 2
Two guide tabs at the top edges of the panel fit into two slots in the top edges of the chassis
opening. Tilt the top of the panel back (away from you) about 30 degrees from vertical and
slide the two guide tabs into the chassis slots. (See Figure 13a.)
Step 3
Check the top of the panel to make sure it is lined up with the top of the chassis opening.
Failure to align the panel at this point can result in equipment damage when performing the
next step.
Step 4
Push the panel upward to push the tabs into the slots (see Figure 13a) and pivot the bottom
of the panel toward the chassis until the panel frame meets the chassis. (See Figure 13b.)
Maintain a steady upward pressure to keep the guide tabs in the chassis slots.
Step 5
When the panel is flush against the front of the chassis, push the panel upward until the
bottom of the panel is level with the bottom of the chassis opening. (See Figure 13c.)
Step 6
While holding the panel in place, place one palm against the top front center of the panel
to brace it, and place the other against the lip near the bottom edge of the frame. (See
Figure 13d.)
Step 7
Push the panel upward and back into the chassis opening until the tabs on the front sides of
the panel are flush against the front of the chassis. (See Figure 13e.) You will have to use
significant force to compress the EMI shielding enough to fit into the opening. If the panel
resists, pull it slightly downward and make sure that the panel is lined up with the top and
sides of the opening in the chassis.
Step 8
When the tabs on the front sides of the panel are flush against the sides of the chassis,
tighten the two captive screws in the bottom edge of the frame.
Step 9
To replace the bottom front panel, place the ball studs on the back of the panel over the
holes in the front lip of the chassis and push the panel onto the chassis until the ball studs
snap into place.
This completes the CI replacement procedure for the Cisco 7507.
