Cisco 7304 Installation Guide - Page 51

Handling a Network Services Engine-Side View

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Chapter 3 Preparation for Installation Figure 3-1 Handling a Network Services Engine-Side View 1 Safety Guidelines 2 66427 1 Metal carrier 2 Printed circuit board Although the metal carrier helps to protect the printed circuit boards from ESD, wear a preventive antistatic strap whenever handling a network services engine. Ensure that the strap makes good skin contact and connect the strap's clip to an unpainted chassis surface to channel unwanted ESD voltages safely to ground. If no wrist strap is available, ground yourself by touching the metal part of the chassis. Caution Make sure to tighten the captive installation screws on the network services engine (use a number 2 Phillips or a 3/16-inch flat-blade screwdriver). These screws prevent accidental removal, provide proper grounding for the router, and help to ensure that the network services engine is properly seated in the router midplane. Following are guidelines for preventing ESD damage: • Always use an ESD wrist strap or ankle strap when installing or replacing the network services engine. Ensure that the ESD strap makes contact with your skin. • Handle the network services engine by its metal carrier edges and handles only; avoid touching the printed circuit board components or any connector pins. • When removing the network services engine, place it on an antistatic surface with the printed circuit board components facing upward, or in a static shielding bag. If you are returning a network services engine to the factory, immediately place it in a static shielding bag. Caution Periodically check the resistance value of the antistatic strap. The measurement should be within the range of 1 to 10 megohms (Mohms). OL-3967-01 Cisco 7304 Network Service Engine Installation and Configuration 3-13

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3-13
Cisco 7304 Network Service Engine Installation and Configuration
OL-3967-01
Chapter 3
Preparation for Installation
Safety Guidelines
Figure 3-1
Handling a Network Services Engine—Side View
Although the metal carrier helps to protect the printed circuit boards from ESD, wear a preventive
antistatic strap whenever handling a network services engine. Ensure that the strap makes good skin
contact and connect the strap’s clip to an unpainted chassis surface to channel unwanted ESD voltages
safely to ground.
If no wrist strap is available, ground yourself by touching the metal part of the chassis.
Caution
Make sure to tighten the captive installation screws on the network services engine (use a number 2
Phillips or a 3/16-inch flat-blade screwdriver). These screws prevent accidental removal, provide proper
grounding for the router, and help to ensure that the network services engine is properly seated in the
router midplane.
Following are guidelines for preventing ESD damage:
Always use an ESD wrist strap or ankle strap when installing or replacing the network services
engine. Ensure that the ESD strap makes contact with your skin.
Handle the network services engine by its metal carrier edges and handles only; avoid touching the
printed circuit board components or any connector pins.
When removing the network services engine, place it on an antistatic surface with the printed circuit
board components facing upward, or in a static shielding bag. If you are returning a network services
engine to the factory, immediately place it in a static shielding bag.
Caution
Periodically check the resistance value of the antistatic strap. The measurement should be within the
range of 1 to 10 megohms (Mohms).
1
Metal carrier
2
Printed circuit board
66427
1
2