IBM EXP15 Hardware Maintenance Manual

Also see for EXP15: Installation and User Handbook

Handling ElectrostaticDischarge-Sensitive DevicesAny computer part containing transistors or integratedcircuits (ICs) should be considered sensitive to electrostaticdischarge (ESD). ESD damage can occur when there is adifference in charge between objects. Protect against ESDdamage by equalizing the charge so that the machine, thepart, the work mat, and the person handling the part are allat the same charge.Notes:1. Use product-specific ESD procedures when theyexceed the requirements noted here.2. Make sure that the ESD protective devices you usehave been certified (ISO 9000) as fully effective.When handling ESD-sensitive parts:Keep the parts in protective packages until they areinserted into the product.Avoid contact with other people.Wear a grounded wrist strap against your skin toeliminate static on your body.Prevent the part from touching your clothing. Mostclothing is insulative and retains a charge even whenyou are wearing a wrist strap.Use the black side of a grounded work mat to providea static-free work surface. The mat is especiallyuseful when handling ESD-sensitive devices.Select a grounding system, such as those listedbelow, to provide protection that meets the specificservice requirement.Note: The use of a grounding system is desirablebut not required to protect against ESDdamage.– Attach the ESD ground clip to any frame ground,ground braid, or green-wire ground.– Use an ESD common ground or reference pointwhen working on a double-insulated orbattery-operated system. You can use coax orconnector-outside shells on these systems.– Use the round ground-prong of the AC plug onAC-operated computers.Grounding RequirementsElectrical grounding of the computer is required foroperator safety and correct system function. Propergrounding of the electrical outlet can be verified by acertified electrician.Related Service Information 131