IBM Aptiva 2174, Hardware Maintenance Service

Page: 134 / 186

102
Handling ESD-Sensitive Parts
Many electronic parts are sensitive to electrostatic discharge (ESD). To prevent
damage when working with ESD-sensitive parts, observe the following
instructions. Do these in addition to taking all the usual precautions, such as
switching off the power and unplugging the power cord.
• Keep the ESD-sensitive part in its original shipping container (or special
ESD bag) until you are ready to install the part.
• Make the fewest possible movements with your body to prevent an increase
of static electricity from clothing fibers, carpets, and furniture.
• Put the ESD wrist strap on your wrist. Ensure the machine is turned off.
Connect the wrist strap to the serial bracket mounting screw. This
discharges any static electricity in your body to the machine frame.
•
Hold the ESD-sensitive part by its edge connector shroud (cover). Do not
touch its pins. If you are removing a plug-able module, use the correct tools.
•
Do not place the ESD-sensitive part on the machine cover or on a metal
table. If you need to put down the ESD-sensitive part for any reason, put it
into it's original container.
• Machine covers and metal tables are electrical grounds. They increase the
risk of damage because they make a discharge path from your body
through the ESD-sensitive part. (Large metal objects can be discharge
paths without being grounded.)
• Prevent ESD-sensitive parts from being accidentally touched by other
persons. Reinstall machine covers when you are not working on the
machine.
•
If possible, keep all ESD-sensitive parts in a grounded metal cabinet.
• Be extra careful when working with ESD-sensitive parts while cold-weather
heating is being used. Low humidity increases static electricity.