Handling Electrostatic Discharge-Sensitive Devices; Grounding Requirements - IBM eserver xSeries 440 8687 Hardware Maintenance Manual

5. Check for any obvious non-IBM alterations. Use good judgment as to the safety
6. Check inside the unit for any obvious unsafe conditions, such as metal filings,
7. Check for worn, frayed, or pinched cables.
8. Check that the power-supply cover fasteners (screws or rivets) have not been

Handling electrostatic discharge-sensitive devices

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
2. Make sure that the ESD protective devices you use have been certified (ISO
When handling ESD-sensitive parts:
v Keep the parts in protective packages until they are inserted into the product.
v Avoid contact with other people.
v Wear a grounded wrist strap against your skin to eliminate static on your body.
v Prevent the part from touching your clothing. Most clothing is insulative and
v Use the black side of a grounded work mat to provide a static-free work surface.
v Select a grounding system, such as those listed below, to provide protection that

Grounding requirements

Electrical 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.
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xSeries 440 Type 8687: Hardware Maintenance Manual
of any non-IBM alterations.
contamination, water or other liquids, or signs of fire or smoke damage.
removed or tampered with.
here.
9000) as fully effective.
retains a charge even when you are wearing a wrist strap.
The mat is especially useful when handling ESD-sensitive devices.
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.