Replacing Internal Components; Replacing The Led Board - Cisco 7000 Hardware Installation And Maintenance

Replacing Internal Components

Caution
equipment.
Replacing Internal Components
The replaceable internal components are accessible by removing the top and bottom front chassis
panels. Always turn off the system power before removing the chassis top front panel. With the top
front panel removed, 100A of current is exposed on the front of the backplane and around the power
supply wiring harnesses.
Note
accompanying documentation for updated procedures and information.
This section contains replacement procedures for the following equipment:
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•
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Figure 5-30 shows the locations of each of these components inside the front cavity of the chassis
(shown with both front chassis panels removed).
Warning
Chapter 2: "Safety Recommendations," "Working with Electricity," and "Preventing Electrostatic
Discharge Damage."
Warning
front panel to expose the chassis interior. When the power supplies are operating, high current levels
are present in the exposed wiring in the front interior of the chassis.

Replacing the LED Board

The LED board contains the three status LEDs that provide system (normal) and power supply
(upper power and lower power) status on the front panel. Replace the LED board if it fails or if one
of the LEDs fails.
The LED board is mounted on a horizontal plane near the top of the chassis interior. (See
Figure 5-30.) The board slides into two brackets mounted to the front of the backplane and attaches
to a connector on the backplane. Two pins in the brackets and a metal spring keep the board in place.
(See Figure 5-31.)
5-238 Cisco 7000 Hardware Installation and Maintenance
Never place a wet filter in the chassis; the moisture drawn into the chassis can damage the
Each replaceable component ships with installation documentation. Refer to the
LED board (MAS-7KLED), the small circuit board that contains the system LEDs and which
connects internally to the RP. Replace this board if an LED or the board itself fails.
Blower (MAS-7KFAN), the chassis fans (in a single unit) that draw in cooling air and distribute
it across the RP, SP (or SSP), and interface processors.
Arbiter board (MAS-7KARB), slave to the switch processor. This board is mounted on the front
side of the backplane.
Before performing any procedures in this chapter, review the following sections in
Ensure that all power supply switches are turned OFF before removing the chassis top