Computer Hardware User Manual

Chapter6.ReplacingFRUs

ThischapterprovidesdetailedinstructionsforreplacingFRUsintheserver.

Guidelinesfortrainedservicetechnicians

Thissectioncontainsinformationfortrainedservicetechnicians.

Inspectingforunsafeconditions

UsetheinformationinthissectiontohelpyouidentifypotentialunsafeconditionsinaLenovoproductthat

youareworkingon.EachLenovoproduct,asitwasdesignedandmanufactured,hasrequiredsafetyitems

toprotectusersandservicetechniciansfrominjury.Theinformationinthissectionaddressesonlythose

items.Usegoodjudgmenttoidentifypotentialunsafeconditionsthatmightbecausedbynon-Lenovo

alterationsorattachmentofnon-Lenovofeaturesoroptionsthatarenotaddressedinthissection.Ifyou

identifyanunsafecondition,youmustdeterminehowseriousthehazardisandwhetheryoumustcorrect

theproblembeforeyouworkontheproduct.

Considerthefollowingconditionsandthesafetyhazardsthattheypresent:

•Electricalhazards,especiallyprimarypower.Primaryvoltageontheframecancauseseriousorfatal

electricalshock.

•Explosivehazards,suchasadamagedCRTfaceorabulgingcapacitor.

•Mechanicalhazards,suchaslooseormissinghardware.

Toinspecttheproductforpotentialunsafeconditions,completethefollowingsteps:

1.Makesurethatthepowerisoffandthepowercordisdisconnected.

2.Makesurethattheexteriorcoverisnotdamaged,loose,orbroken,andobserveanysharpedges.

3.Checkthepowercord:

•Makesurethatthethird-wiregroundconnectorisingoodcondition.Useametertomeasurethird-wire

groundcontinuityfor0.1ohmorlessbetweentheexternalgroundpinandtheframeground.

•Makesurethatthepowercordisthecorrecttype.

•Makesurethattheinsulationisnotfrayedorworn.

4.Removethecover.

5.Checkforanyobviousnon-Lenovoalterations.Usegoodjudgmentastothesafetyofanynon-Lenovo

alterations.

6.Checkinsidetheserverforanyobviousunsafeconditions,suchasmetallings,contamination,wateror

otherliquid,orsignsofreorsmokedamage.

7.Checkforworn,frayed,orpinchedcables.

8.Makesurethatthepower-supplycoverfasteners(screwsorrivets)havenotbeenremovedortampered

with.

Guidelinesforservicingelectricalequipment

Observethefollowingguidelineswhenservicingelectricalequipment:

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