
Any computer part containing transistors  or integrated
circuits (ICs) should be considered  sensitive to electrostatic
discharge (ESD). ESD damage  can occur when there is  a
difference in charge between objects. Protect against ESD
damage by equalizing the charge  so that the machine, the
part, the work mat, and  the person handling the part  are all
at the same charge.
 Notes 
1. Use product-specific ESD procedures when  they
exceed the requirements noted here.
2. Make sure that the ESD  protective devices you
use have been certified (ISO  9000) as fully
effective.
When handling ESD-sensitive parts:
Keep the parts in protective  packages until they are
inserted into the product.
Avoid contact with other people.
Wear a grounded wrist strap  against your skin to
eliminate static on your body.
Prevent the part from touching  your clothing. Most
clothing is insulative and retains  a charge even when
you are wearing a wrist  strap.
Use the black side of  a grounded work mat to  provide
a static-free work surface. The mat is especially
useful when handling ESD-sensitive devices.
Select a grounding system, such  as those listed
below, to provide protection that  meets the specific
service requirement.
 Note 
The use of a grounding  system is desirable but
not required to protect against  ESD damage.
– Attach the ESD ground clip to  any frame ground,
ground braid, or green-wire ground.
– Use an ESD common ground or  reference point
when working on a double-insulated  or
battery-operated system. You can  use coax or
connector-outside shells on these systems.
– Use the round ground-prong of the  AC plug on
AC-operated computers.
 Grounding RequirementsElectrical grounding of the computer  is required for
operator safety and correct system  function. Proper
grounding of the electrical outlet  can be verified by a
certified electrician.
xx IBM Mobile Systems ThinkPad 310  (D/E/ED) HMM