User manual

5
Safety information
Safety inspection guide
Thepurpose ofthisinspection guideisto assistyouin identifyingpotential
unsafeconditions.Aseachmachinewasdesignedand built,requiredsafety
itemswereinstalledto protectusersand servicepersonnelfrominjury.This
guideaddressesonlythoseitems.You shouldusegoodjudgmenttoidentify
potentialsafetyhazardsaccordingtotheattachmentofnon-Lenovofeaturesor
optionsnotcoveredbythisinspectionguide.
Ifanyunsafeconditionsarepresent, youmustdeterminehowseriousthe
apparenthazardcouldbeandwhetheryoucancontinuewithoutrstcorrecting
theproblem.
Considertheseconditionsandthesafetyhazardstheypresent:
• Electricalhazards,especiallyprimarypower(primaryvoltageontheframe
cancauseseriousorfatalelectricalshock)
• Explosivehazards,suchasadamagedCRTfaceorabulgingcapacitor
• Mechanicalhazards,suchaslooseormissinghardware
Todeterminewhetherthereareanypotential unsafeconditions,usethe
followingchecklistatthebeginningofeveryservicetask.Beginthecheckswith
thepoweroff,andthepowercorddisconnected.
Checklist:
1. Checkexteriorcoversfordamage(loose,broken,orsharpedges).
2. Turnoffthecomputer.Disconnectthepowercord.
3. Checkthepowercordfor:
a. Athird-wiregroundconnectoringoodcondition.Useametertomeasure
third-wiregroundcontinuityfor 0.1ohmorlessbetweentheexternal
groundpinandtheframeground.
b. Thepowercordshouldbethetypespeciedinthepartslist.
c. Insulationmustnotbefrayedorworn.
4. Checkforcrackedorbulgingbatteries.
5. Removethecover.
6. Checkforanyobviousnon-Lenovoalterations.Usegoodjudgmentastothe
safetyofanynon-Lenovoalterations.
7. Checkinsidethe unitforany obviousunsafeconditions,suchasmetal
filings,contamination,wateror otherliquids,orsignsoffireorsmoke
damage.
8. Checkforworn,frayed,orpinchedcables.
9. Checkthat thepower-supplycover fasteners(screwsorrivets)havenot
beenremovedortamperedwith.