Sharp VL-E40S Technical Information PDF herunterladen (Seite 41)

Powersystemcheckout

Toverifyasymptom,dothefollowing:

1.Turnoffthecomputer.

2.Removethebatterypack.

3.Connecttheacadapter.

4.Checkthatpowerissuppliedwhenyouturnonthecomputer.

5.Turnoffthecomputer.

6.Disconnecttheacadapterandinstallthechargedbatterypack.

7.Checkthatthebatterypacksuppliespowerwhenyouturnonthecomputer.

Ifyoususpectapowerproblem,seetheappropriateoneofthefollowingpowersupplycheckouts:

•“Checkingtheacadapter”onpage35

•“Checkingoperationalcharging”onpage35

•“Checkingthebatterypack”onpage36

•“Checkingthebackupbattery”onpage36

Checkingtheacadapter

Youareherebecausethecomputerfailsonlywhentheacadapterisused.

•Ifthepower-onindicatordoesnotturnon,checkthepowercordoftheacadapterforcorrectcontinuity

andinstallation.

•Ifthecomputerdoesnotchargeduringoperation,goto“Checkingoperationalcharging”onpage35

Tochecktheacadapter,dothefollowing:

1.Unplugtheacadaptercablefromthecomputer.

2.Measuretheoutputvoltageattheplugoftheacadaptercable.Seethefollowinggure:

Voltage(Vdc)

1+20

Ground

(20V)

Note:Outputvoltageofpinno.2oftheacadaptermaydifferentfromtheoneyouareservicing.

3.Ifthevoltageisnotcorrect,replacetheacadapter.

4.Ifthevoltageisacceptable,dothefollowing:

•Replacethesystemboard.

•Iftheproblempersists,goto“FRUtests”onpage34.

Note:Noisefromtheacadapterdoesnotalwaysindicateadefect.

Checkingoperationalcharging

Tocheckwhetherthebatterychargesproperlyduringoperation,dothefollowing:

Note:Beforeyoubegin,installadischargedbatterypackorbatterypackthathaslessthan50%ofthe

totalpowerremaininginthecomputer.

1.Ifthestatusindicatordoesnotturnon,removethebatterypackandletitreturntoroomtemperature.

2.Reinstallthebatterypack.

Chapter3.Generalcheckout35

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Sharp VL-E40S Technical Information Seite 41