Preventing Electrostatic Discharge Damage; Tools Required; Removing And Replacing The Blower Module - Cisco MAS-7513-FAN Replacement Instructions Manual

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when electronic boards or components are
handled improperly, can result in complete or intermittent failures.
Following are guidelines for preventing ESD damage:
•
Always use an ESD-preventive wrist strap or ankle strap and ensure that it makes good skin
contact.
•
When removing or installing a blower module, connect the equipment end of a ground strap to
an unpainted surface of the chassis, such as the chassis frame.
•
If you are returning a replaced part to the factory, immediately place it in a static shielding bag
to avoid ESD damage to the board.
•
The wrist strap only protects the board from ESD voltages on the body; ESD voltages on clothing
can still cause damage.
Warning
measurement should be between 1 and 10 megohms.

Tools Required

You need the following tools to install or replace a blower module:
•
A 1/4-inch flat-blade screwdriver.
•
Spare blower module assembly
•
ESD-preventive wrist strap.
•
Antistatic bag in which the old blower module assembly should be placed

Removing and Replacing the Blower Module

The blower provides cooling air to the internal system components. If you determined that the
blower or its control board has failed, you need to replace the blower module assembly. If you
determined that the LED board inside the blower module assembly has failed, you need to replace
the blower module assembly. The LED and blower control boards inside the blower module
assembly are not separately replacable.
When viewing the chassis from the interface processor end, the blower module is located above the
card cage (See Figure 4.) Two slotted captive screws hold the blower module in place.
Warning
however, when the power is ON and the blower module is removed, high current is exposed on the
blower module power connector at the backplane.
Follow these steps to replace the blower module.
Step 1
Step 2
For safety, periodically check the resistance value of the antistatic strap. The
It is not necessary to turn OFF system power before removing the blower module;
Locate the blower module, which is above the card cage on the noninterface processor end
of the chassis. (See Figure 4.)
Use the flat-blade screwdriver to loosen the captive screws that fasten each end of the
blower module. (See Figure 4.)
Removing and Replacing the Blower Module
Cisco 7513 Blower Module Assembly Replacement Instructions 9