•Iftheproblempersists,gotoChapter5“LenovoB470andB470e”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
followinggure:
Terminal
Voltage(Vdc)
1+0to+14
7
Ground(-)
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
Kommentare zu diesen Handbüchern