Lenovo E49 Manuale Utente Scaricare il pdf (Pagina 37)

•Iftheproblempersists,gotoChapter5“LenovoE49andZhaoYangE49”onpage37.

Note:Noisefromtheacpoweradapterdoesnotalwaysindicateadefect.

Checkingoperationalcharging

Tocheckwhetherthebatterychargesproperlyduringoperation,useadischargedbatterypackorabattery

packthathaslessthan50%ofthetotalpowerremainingwheninstalledinthecomputer.

Performoperationalcharging.Ifthebatterystatusindicatororicondoesnotturnon,removethebattery

packandletitreturntoroomtemperature.Reinstallthebatterypack.Ifthechargeindicatororiconstilldoes

notturnon,replacethebatterypack.

Ifthechargeindicatorstilldoesnotturnon,replacethesystemboard.Thenreinstallthebatterypack.Ifitis

stillnotcharged,gotothenextsection.

Checkingthebatterypack

Batterychargingdoesnotstartuntilthepowermetershowsthatlessthan95%ofthetotalpowerremains;

underthisconditionthebatterypackcanchargeto100%ofitscapacity.Thisprotectsthebatterypackfrom

beingoverchargedorfromhavingashortenedlife.

Tocheckyourbattery,moveyourcursortothepowermetericonintheicontrayoftheWindows

taskbar

andwaitforamoment(butdonotclickit),andthepercentageofbatterypowerremainingisdisplayed.To

getdetailedinformationaboutthebattery,double-clickthepowermetericon.

Note:Ifthebatterypackbecomeshot,itmaynotbeabletobecharged.Removeitfromthecomputerand

leaveitatroomtemperatureforawhile.Afteritcoolsdown,reinstallandrechargeit.

Tocheckthebatterypack,dothefollowing:

1.Poweroffthecomputer.

2.Removethebatterypackandmeasurethevoltagebetweenbatteryterminals1(+)and7(-).Seethe

followinggure:

Terminal

Voltage(Vdc)

1+0to+14

Ground(-)

1(+)

2(+)

6(-)

7(-)

3.Ifthevoltageislessthan+11.0Vdc,thebatterypackhasbeendischarged.

Note:Rechargingwilltakeatleast3hours,eveniftheindicatordoesnotturnon.

Ifthevoltageisstilllessthan+11.0Vdcafterrecharging,replacethebattery.

4.Ifthevoltageismorethan+11.0Vdc,measuretheresistancebetweenbatteryterminals5and7.

Theresistancemustbe4to30KΩ.

Iftheresistanceisnotcorrect,replacethebatterypack.Iftheresistanceiscorrect,replacethesystem

board.

Chapter3.Generalcheckout31

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Lenovo E49 Manuale Utente Pagina 37