Cisco 7000 and 7507 LED Board MAS-7KLED Manuale di istruzioni per la sostituzione - Pagina 7
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•
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
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
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
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
For safety, periodically check the resistance value of the antistatic strap. The measurement
Before working on a chassis or working near power supplies, unplug the power cord on
This unit might have more than one power cord. To reduce the risk of electric shock,
The following warning is for units with DC-input power supplies.
Removing and Replacing the Front Chassis Panels
Cisco 7000 and Cisco 7507 LED Board Replacement Instructions
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