Cisco Systems Jackscrew Manual De Usuario

The following parts are included in each jackscrew replacement kit. Because the holes
in the EIP are threaded, you need only two lock washers and two jackscrews for each
port. Discard the extra flat washers and hex nuts included in the kit.

■

2 jackscrews

■

2 lockwashers

■

4 flat washers (discard)

■

2 hex nuts (discard)

Electrostatic discharge (ESD) damage, which occurs when electronic cards or
components are improperly handled, can result in complete or intermittent failures. The
EIP comprises a printed circuit board that is fixed in a metal carrier. Electromagnetic
interference (EMI) shielding, connectors, and a handle are integral components of the
carrier. Although the metal carrier helps to protect the board from ESD, you can still
damage the board by touching the connector pins. Always use a preventive antistatic
strap whenever working on the EIP, and avoid touching the connector pins.

Following are guidelines for preventing ESD damage:

■

Always use an ESD wrist strap or ankle strap and ensure that it makes good skin
contact.

■

Connect the equipment end of the strap to one of the captive installation screws on
an installed power supply (see Figure 4).

■

Handle carriers by the handles and carrier edges only; avoid touching the board or
any connector pins.

■

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

Placement of ESD Wrist Strap

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