User Guide

Powersystemcheckout

Toverifyasymptom,dothefollowing:

1.T urnoffthecomputer.

2.Removethebatterypack.

3.Connecttheacadapter.

4.Checkthatpowerissuppliedwhenyouturnonthecomputer.

5.T urnoffthecomputer.

6.Disconnecttheacadapterandinstallthechargedbatterypack.

7.Checkthatthebatterypacksuppliespowerwhenyouturnonthecomputer.

Ifyoususpectapowerproblem,seetheappropriateoneofthefollowingpowersupplycheckouts:

•“Checkingtheacadapter”onpage31

•“Checkingoperationalcharging”onpage31

•“Checkingthebatterypack”onpage32

•“Checkingthebackupbattery”onpage32

Checkingtheacadapter

Youareherebecausethecomputerfailsonlywhentheacadapterisused.

•Ifthepowerproblemoccursonlywhenthe

ThinkPadX200UltraBaseisused,replacetheUltraBase.

•Ifthepower-onindicatordoesnotturnon,checkthepowercordoftheacadapterforcorrectcontinuity

andinstallation.

•Ifthecomputerdoesnotchargeduringoperation,goto“Checkingoperationalcharging”onpage31

Tochecktheacadapter,dothefollowing:

1.Unplugtheacadaptercablefromthecomputer.

2.Measuretheoutputvoltageattheplugoftheacadaptercable.Seethefollowinggure:

Voltage(Vdc)

1+20

Ground

Note:Outputvoltageofpinno.2oftheacadaptermaydifferentfromtheoneyouareservicing.

3.Ifthevoltageisnotcorrect,replacetheacadapter.

4.Ifthevoltageisacceptable,dothefollowing:

•Replacethesystemboard.

•Iftheproblempersists,goto“FRUtests”onpage29.

Note:Noisefromtheacadapterdoesnotalwaysindicateadefect.

Checkingoperationalcharging

Tocheckwhetherthebatterychargesproperlyduringoperation,useadischargedbatterypackorabattery

packthathaslessthan50%ofthetotalpowerremainingwheninstalledinthecomputer.

Chapter3.Generalcheckout31