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Replacing the CI in the Cisco 7505

The following procedures describe how to replace the CI in the Cisco 7505. Depending on your

installation, you might need to remove the Cisco 7505 from the rack in which it is installed. Figure 1

shows the interior of the Cisco 7505 at the front (noninterface processor end) of the chassis, with the

front chassis panel removed to show the internal components.

Figure 1

Chassis interface

Backplane cover

Overview of the CI Replacement in the Cisco 7505

In the Cisco 7505, the CI mounts directly to the noninterface processor side of the backplane, behind

the backplane cover. (See Figure 1.) A connector on the back of the CI plugs into a backplane socket,

and the corners of the CI butt up against four standoffs. When the backplane cover is in place, four

long Phillips screws extend through the cover, the CI, and standoffs to secure the cover and the CI

to the backplane. To replace the CI, you must remove the chassis cover panel and remove the fan

tray, power harness cover, and backplane cover.

You must remove the fan tray in order to remove the backplane cover. To remove the fan tray, you

need only remove a single M4 pan-head screw that anchors the fan tray to the interior chassis frame.

The fan tray slides into the right side of the chassis (when viewing the chassis from the noninterface

processor end).

Because the power harness cover straddles both the power supply and backplane cover, you must

remove it to access the CI. The power harness cover shields the wiring harness that delivers DC

power from the power supply to the backplane. A tab at the bottom of the cover ﬁts into a slot in the

chassis ﬂoor; a single Phillips screw secures the top of the harness cover to the backplane cover.

The backplane cover shields the noninterface processor side of the backplane and the CI (the CI

cover is integrated with the backplane cover). Fourteen Phillips screws secure the four ﬂanged sides

of the cover to the interior chassis frame and, near the center of the cover, two additional screws

secure the cover to two standoffs mounted to the backplane (behind the cover).

Internal Chassis Components

Power supply

handles

Power harness

cover

Replacing the Chassis Interface (CI) Board in the Cisco 7500 Series Chassis

Arbiter

Power supply

Fan tray

Replacing the CI in the Cisco 7505