Lenovo Y50-70 User Manual download pdf (Page 7)

Safety information

Electrical safety

Observethefollowingruleswhenworkingonelectricalequipments.

Important:

Use only approved tools and test equipments. Some hand tools have handles

covered with a soft material that does not insulate you when working with live

electrical currents.

Many customers have rubber floor mats near their machines that contain small

conductive bers to decrease electrostatic discharges. Do not use such kind of mat

to protect yourself from electrical shock.

• Findtheroomemergency power-off(EPO)switch,disconnectingswitchor

electricaloutlet.Ifanelectricalaccident occurs,you canthen operatethe

switchorunplugthepowercordquickly.

• Donotworkalone underhazardousconditionsornear theequipment that

hashazardousvoltages.

• Disconnectallpowerbefore:

– Performingamechanicalinspection

– Workingnearpowersupplies

– Removingorinstallingmainunits

• Beforeyoustarttoworkonthemachine,unplug thepower cord.Ifyou

cannotunplugit,askthecustomerto power-offthewall boxthatsupplies

powertothemachine,andtolockthewallboxintheoffposition.

• Ifyouneedtoworkonamachinethathasexposedelectricalcircuits,

observethefollowingprecautions:

– Ensurethatanotherperson,familiarwiththepower-offcontrols,isnear

you.

 Attention:

Anotherperson mustbe theretoswitchoffthepower,if

necessary.

– Useonlyonehandwhenworkingwithpowered-onelectricalequipment;

keeptheotherhandinyourpocketorbehindyourback.

 Attention:Anelectricalshockcanoccuronlywhenthereisacomplete

circuit.Byobservingtheaboverule,you maypreventacurrentfrom

passingthroughyourbody.

– Whenusingtesters,setthecontrolscorrectlyandusetheapproved

probeleadsandaccessoriesforthattester.

– Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulate

youfromgroundssuchasmetaloorstripsandmachineframes.

Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;

instructionsfortheseprecautionsareinthesafetysectionsofmaintenance

information.Beextremelycarefulwhenyoumeasurethehighvoltages.

• Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperational

condition.

• Donotusewornorbrokentoolsandtesters.

• Neverassumethatpowerhasbeendisconnectedfromacircuit.First,check

ittomakesurethatithasbeenpoweredoff.

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Lenovo Y50-70 User Manual Page 7

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