Lenovo ThinkPad Edge E420s Manuel d'utilisateur télécharger pdf (Page 14)

Usingheadphonesorearphones

Ifyourcomputerhasbothaheadphoneconnectorandanaudioline-out

connector,alwaysusetheheadphoneconnectorforheadphones(alsocalleda

headset)orearphones.

CAUTION:

Excessivesoundpressurefromearphonesandheadphonescancause

hearingloss.Adjustmentoftheequalizertomaximumincreasesthe

earphonesandheadphonesoutputvoltageandthereforethesoundpressure

level.

Excessiveuseofheadphonesorearphonesforalongperiodoftimeathigh

volumecanbedangerousiftheoutputoftheheadphoneorearphoneconnectors

donotcomplywithspecicationsofEN50332-2.Theheadphoneoutput

connectorofyourcomputercomplieswithEN50332-2Subclause7.This

specicationlimitsthecomputer’smaximumwidebandtrueRMSoutputvoltage

to150mV.Tohelpprotectagainsthearingloss,ensurethattheheadphonesor

earphonesyouusealsocomplywithEN50332-2(Clause7Limits)forawideband

characteristicvoltageof75mV.UsingheadphonesthatdonotcomplywithEN

50332-2canbedangerousduetoexcessivesoundpressurelevels.

IfyourLenovocomputercamewithheadphonesorearphonesinthepackage,

asaset,thecombinationoftheheadphonesorearphonesandthecomputer

alreadycomplieswiththespecicationsofEN50332-1.Ifdifferentheadphones

orearphonesareused,ensurethattheycomplywithEN50332-1(Clause6.5

LimitationValues).UsingheadphonesthatdonotcomplywithEN50332-1canbe

dangerousduetoexcessivesoundpressurelevels.

Datasafety

Donotdeleteunknownlesorchangethenameoflesordirectoriesthatwere

notcreatedbyyou;otherwise,yourcomputersoftwaremightfailtowork.

Beawarethataccessingnetworkresourcescanleaveyourcomputervulnerable

tocomputerviruses,hackers,spyware,andothermaliciousactivitiesthatmight

damageyourcomputer,software,ordata.Itisyourresponsibilitytoensurethat

youhaveadequateprotectionintheformofrewalls,antivirussoftware,and

anti-spywaresoftwareandkeepthissoftwareuptodate.

Additionalsafetyinformation

DANGER

Plasticbagscanbedangerous.Keepplasticbagsawayfrombabiesand

childrentoavoiddangerofsuffocation.

xiiSafetyandWarrantyGuide

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Lenovo ThinkPad Edge E420s Manuel d'utilisateur Page 14