Cisco Systems MAS-7KLED Removing and Replacing the Front Chassis Panels, List of Parts and Tools

Removing and Replacing the Front Chassis Panels

•When removing or installing an LED board, connect the equipment end of the ground strap to an unpainted surface of the chassis, such as the vertical metal frame that is exposed when the front chassis panels are removed.

•Handle boards by the edges only; avoid touching the board components, traces, or connector pins.

•Place a removed board component-side-up on an antistatic surface or in a static shielding bag. If you are returning the board to the factory, immediately place it in a static shielding bag to avoid ESD damage.

•Avoid contact between the board and clothing. The wrist strap only protects the board from ESD voltages on the body; ESD voltages on clothing can still cause damage.

Note For safety, periodically check the resistance value of the antistatic strap. The measurement should be within the range of 1 and 10 megohms.

List of Parts and Tools

You need the following tools to replace a front chassis panel or an LED board:

•If you are replacing the top front chassis panel or the LED board, you need a 3/16-inch flat-blade or Number 2 Phillips screwdriver to remove the top front chassis panel. Earlier chassis (the first several hundred shipped) used slotted screws, and later chassis used Phillips screws to secure the top front panel to the chassis.

•If you are replacing an LED board, you need an antistatic mat, foam pad, or bag for the removed board (immediately place a removed board into an antistatic bag if you will return it to the factory)

No tools are required to remove or replace the bottom front panel or the LED board.

Removing and Replacing the Front Chassis Panels

You must remove the top and bottom front chassis panels to access the chassis interior to replace the LED board. Carefully follow the instructions for removing and replacing the top front panel; you can damage or destroy the LED board or top front panel by forcing a misaligned panel onto or off of the chassis body.

Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. (For translation of this safety warning, refer to the section “Power Supply Disconnection Warning” on page 16.)

Warning This unit might have more than one power cord. To reduce the risk of electric shock, disconnect the two power supply cords before servicing the unit. (For translation of this safety warning, refer to the section “Electric Shock Warning” on page 17.)

Note The following warning is for units with DC-input power supplies.

Cisco 7000 and Cisco 7507 LED Board Replacement Instructions 7