Nortel Networks 553-3001-211 manual Precautions

Page 82 of 894 Circuit card installation

Precautions

To avoid personal injury and equipment damage, review the following guidelines before handling system equipment.

WARNING

Module covers are not hinged; do not let go of the covers. Lift covers away from the module and set them out of your work area.

WARNING

Circuit cards may contain a lithium battery. There is a danger of explosion if the battery is incorrectly replaced. Do not replace components on any circuit card; you must replace the entire card.

Dispose of circuit cards according to the manufacturer’s instructions.

To avoid damage to circuit cards from static discharge, wear a properly connected antistatic wrist strap when you work on system equipment. If a wrist strap is not available, regularly touch one of the bare metal strips in a module to discharge static. Figure 15 on page 83 shows the recommended connection points for the wrist strap and the bare metal strips you should touch.

Handle circuit cards as follows:

•Unpack or handle cards away from electric motors, transformers, or similar machinery.

•Handle cards by the edges only. Do not touch the contacts or components.

•Set cards on a protective antistatic bag. If an antistatic bag is not available, hand-hold the card, or set it in a card cage unseated from the connectors.

•Store cards in protective packing. Do not stack cards on top of each other unless they are packaged.

553-3001-211 Standard 2.00 September 2004