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Lenovo 3000 Series Laptop User Manual

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Lenovo Notebook Computer User Guide

computer.Usingthewrongadaptormightdamageyour

computer.



Caution:TheACadaptorcanautomaticallyadjusttoany

voltagefrom100to240volts,aswellasafrequencyof

either50or60hertz,thusenablingyoutousethecomputer

inalmostanyregion.ThePowerJackandpowercordjack

mightvaryindifferentcountriesand/orregions.Makesure

thattheACadaptoriscorrectlyconnectedtothepower

source.Awrongconnectioncan damageyourcomputerand

resultinafireaccident.

1.1.3Fanlouvers

TheinternalFanLouversenableairtocirculateinthecomputerand

cooltheCentralProcessor.



Hint:Yournotebookswitchesonthefanwhenthe

CentralProcessorbecomeshot.Theoperationofthefan

mightcausesomenoises,whichisanormalsituation.



Caution:Toavoidcompromisingventilation,donotplace

anyobstacleinfrontofthefan.

1.1.4LANport,Modemjack 

1.1.4.1LANport

TheRJ‐45networkjackallows you toconnectyourcomputerto a

localareanetwork(LAN).

5

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