Lenovo U31 70 Hmm 201601 User Manual Hardware Maintenance Laptop (Lenovo) Type 80M6

User Manual: Lenovo Lenovo U31-70 Hmm 201601 Hardware Maintenance Manual - Lenovo U31-70 U31-70 Laptop (Lenovo) - Type 80M6 80M6

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Lenovo U31-70

Hardware

Maintenance

Manual

Note:

• Before using this information and the product it supports, be sure to read the general information under

“Notices” on page 75.

First Edition (April 2015)

© Copyright Lenovo 2015. All rights reserved.

LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuantaGeneral

ServicesAdministration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionsset

forthinContractNo.GS-35F-05925.

©2015Lenovo

iii

Contents

About this manual ....................................... iv

Safety information ........................................ 1

Generalsafety................................................ 2

Electricalsafety.............................................. 3

Safetyinspectionguide.................................. 5

Handlingdevicesthataresensitiveto

electrostaticdischarge.................................... 6

Groundingrequirements................................. 6

Safetynotices:multilingualtranslations.......... 7

Lasercompliancestatement......................... 14

Important service information ................... 16

StrategyforreplacingFRUs......................... 16

Strategyforreplacingaharddiskdrive............17

Importantnoticeforreplacingasystem

board................................................................17

Importantinformationaboutreplacing

RoHScompliantFRUs................................. 18

General checkout ...................................... 19

Whattodorst............................................. 20

Powersystemcheckout................................ 21

CheckingtheACadapter.................................21

Checkingoperationalcharging.........................21

Checkingthebatterypack................................22

Related service information ...................... 23

Restoringthefactorycontentsbyusing

OneKeyRecovery........................................ 23

Restoreoffactorydefault.................................23

Passwords.................................................... 24

Power-onpassword..........................................24

Hard-diskpassword..........................................24

Administratorpassword....................................24

Powermanagement..................................... 25

Screenblankstate............................................25

Puttingthecomputertosleeporshutting

itdown..............................................................25

Puttingyourcomputertosleep.........................25

Shuttingdownthecomputer.............................25

Lenovo U31-70 ............................................ 26

Specications............................................... 26

Statusindicators........................................... 28

Hotkeys......................................................... 29

FRUreplacementnotices............................. 30

Screwnotices..................................................30

RemovingandreplacinganFRU................. 31

1010Basecover...............................................32

1020Batterypack.............................................34

1030PCIExpressMiniCardforwireless

LAN...................................................................36

1040DIMM.......................................................38

1050Speakers.................................................39

1060Harddiskdrive.........................................40

1070FanassemblyandHeatSink

assembly...........................................................42

1080IOboard,DC-incable..............................46

1090

Systemboard............................................ 48

1100Uppercase...............................................51

1110LCDunit...................................................54

1120Integratedcamera,antenna

assemblyandLCDhinges................................57

Locations...................................................... 60

Frontviewandright-sideview..........................60

BottomandLeft-sideview...............................61

Partslist........................................................ 62

Overall..............................................................63

LCDFRUs........................................................69

Miscellaneousparts..........................................71

ACadapters......................................................71

Screws..............................................................71

Powercords......................................................72

Notices......................................................... 75

Trademarks.................................................. 76

iv

About this manual

Thismanualcontainsserviceandreferenceinformationforthefollowing

Lenovoproduct:

Lenovo U31-70

Usethismanualtotroubleshootproblems.

Themanualisdividedintothefollowingsections:

• Thecommonsectionsprovidegeneralinformation,guidelines,andsafety

informationrequiredforservicingcomputers.

• Theproduct-specicsectionincludesservice,reference,andproduct-specic

partsinformation.

Important:

This manual is intended only for trained servicers who are familiar with Lenovo

products. Use this manual to troubleshoot problems effectively.

Before servicing a Lenovo product, make sure to read all the information under

“Safety information” on page 1 and “Important service information” on page 16.

1

Safety information

Safety information

Thischapterpresentsthefollowingsafetyinformationthatyouneedtoget

familiarwithbeforeyouserviceaLenovoU31-70computer:

• “Generalsafety”onpage2

• “Electricalsafety”onpage3

• “Safetyinspectionguide”onpage5

• “Handlingdevicesthataresensitivetoelectrostaticdischarge”onpage6

• “Groundingrequirements”onpage6

• “Safetynotices:multilingualtranslations”onpage7

• “Lasercompliancestatement”onpage14

2

U31-70 Hardware Maintenance Manual

General safety

Followtheserulesbelowtoensuregeneralsafety:

• Observeagoodhousekeeping inthe areawherethemachinesareput

duringandafterthemaintenance.

• Whenliftinganyheavyobject:

1. Makesurethatyoucanstandsafelywithoutslipping.

2. Distributetheweightoftheobjectequallybetweenyourfeet.

3. Useaslowliftingforce.Nevermovesuddenlyortwistwhenyouattempt

toliftit.

4. Liftitbystandingorpushingupwithyourlegmuscles;thisactioncould

avoidthestrainfromthemusclesinyourback.Donotattempttoliftany

objectthatweighsmorethan16kg(35lb)orthatyouthinkistooheavy

foryou.

• Donotperformany actionthatcauseshazardstothecustomer,or that

makesthemachineunsafe.

• Beforeyou startthe machine,makesurethatotherservicerepresentatives

andthecustomerarenotinahazardousposition.

• Pleaseremovecoversand otherparts ina safeplace,awayfromall

personnel,whileyouareservicingthemachine.

• Keepyourtoolcaseawayfromwalkareassothatotherpeoplewillnot trip

overit.

• Donotwearlooseclothingthatcanbetrappedinthemovingparts ofthe

machine.Makesurethatyoursleevesarefastenedorrolledupaboveyour

elbows.Ifyourhairislong,fastenit.

• Inserttheendsofyournecktieorscarfinsideclothingor fastenit withthe

nonconductiveclip,about8centimeters(3inches)fromtheend.

• Donotwearjewelry,chains,metal-frameeyeglasses,ormetalfastenersfor

yourclothing.

Attention:Metalobjectsaregoodelectricalconductors.

• Wearsafetyglasses whenyouarehammering,drilling,soldering,cutting

wire,attachingsprings,usingsolvents,orworkinginanyotherconditions

thatmaybehazardoustoyoureyes.

• Afterservice, reinstallall safetyshields,guards,labels,and groundwires.

Replaceanysafetydevicethatiswornordefective.

• Reinstallallcoverscorrectlybeforereturningthemachinetothecustomer.

• Fanlouversonthemachinehelp toprevent theoverheating ofinternal

components.Donotobstructfanlouvers orcover themwith labelsor

stickers.

3

Safety information

Electrical safety

Observethefollowingruleswhenworkingonelectricalequipments.

Important:

Use only approved tools and test equipments. Some hand tools have handles

covered with a soft material that does not insulate you when working with live

electrical currents.

Many customers have rubber floor mats near their machines that contain small

conductive bers to decrease electrostatic discharges. Do not use such kind of mat

to protect yourself from electrical shock.

• Findtheroomemergency power-off(EPO)switch,disconnectingswitchor

electricaloutlet.Ifanelectricalaccident occurs,you canthen operatethe

switchorunplugthepowercordquickly.

• Donotworkalone underhazardousconditionsornear theequipment that

hashazardousvoltages.

• Disconnectallpowerbefore:

– Performingamechanicalinspection

– Workingnearpowersupplies

– Removingorinstallingmainunits

• Beforeyoustarttoworkonthemachine,unplug thepower cord.Ifyou

cannotunplugit,askthecustomerto power-offthewall boxthatsupplies

powertothemachine,andtolockthewallboxintheoffposition.

• Ifyouneedtoworkonamachinethathasexposedelectricalcircuits,

observethefollowingprecautions:

– Ensurethatanotherperson,familiarwiththepower-offcontrols,isnear

you.

Attention:Anotherperson mustbetheretoswitchoffthepower,if

necessary.

– Useonlyonehandwhenworkingwithpowered-onelectricalequipment;

keeptheotherhandinyourpocketorbehindyourback.

Attention:Anelectricalshockcanoccuronlywhenthereisacomplete

circuit.Byobservingtheaboverule,you maypreventacurrentfrom

passingthroughyourbody.

– Whenusingtesters,setthecontrolscorrectlyandusetheapproved

probeleadsandaccessoriesforthattester.

– Standonsuitablerubbermats(obtainedlocally,ifnecessary)toinsulate

youfromgroundssuchasmetaloorstripsandmachineframes.

Observethespecialsafetyprecautionswhenyouworkwithveryhighvoltages;

instructionsfortheseprecautionsareinthesafetysectionsofmaintenance

information.Beextremelycarefulwhenyoumeasurethehighvoltages.

• Regularlyinspectandmaintainyourelectricalhandtoolsforsafeoperational

condition.

• Donotusewornorbrokentoolsandtesters.

• Neverassumethatpowerhasbeendisconnectedfromacircuit.First,check

ittomakesurethatithasbeenpoweredoff.

4

U31-70 Hardware Maintenance Manual

• Alwayslookcarefullyforpossiblehazardsinyourworkarea.Examplesof

thesehazardsaremoistoors,nongroundedpowerextensioncables,power

surges,andmissingsafetygrounds.

• Donottouchliveelectricalcircuits withthe reflectivesurface ofaplastic

dentalmirror.Thesurfaceisconductive;suchtouchingcancausepersonal

injuryandmachinedamage.

• Donotservicethefollowingpartswiththepoweronwhentheyareremoved

fromtheirnormaloperatingplacesinamachine:

– Powersupplyunits

– Pumps

– Blowersandfans

– Motorgenerators

andsimilarunits.(Thispracticeensurescorrectgroundingoftheunits.)

• Ifanelectricalaccidentoccurs:

– Caution:donotbecomeavictimyourself.

– Switchoffthepower.

– Sendthevictimtogetmedicalaid.

5

Safety information

Safety inspection guide

Thepurpose ofthis inspectionguideistoassistyouinidentifyingpotential

unsafeconditions.Aseachmachine wasdesigned andbuilt, requiredsafety

itemswereinstalledtoprotectusersandservicepersonnelfrominjury.This

guideaddressesonlythoseitems.You shoulduse goodjudgment toidentify

potentialsafetyhazardsaccordingtotheattachmentofnon-Lenovofeaturesor

optionsnotcoveredbythisinspectionguide.

Ifanyunsafeconditionsarepresent,youmustdetermine howserious the

apparenthazardcouldbeandwhetheryoucancontinuewithoutrstcorrecting

theproblem.

Considertheseconditionsandthesafetyhazardstheypresent:

• Electricalhazards,especiallyprimarypower(primaryvoltageontheframe

cancauseseriousorfatalelectricalshock)

• Explosivehazards,suchasadamagedCRTfaceorabulgingcapacitor

• Mechanicalhazards,suchaslooseormissinghardware

Todeterminewhetherthereareanypotentialunsafeconditions, usethe

followingchecklistatthebeginningofeveryservicetask.Beginthecheckswith

thepoweroff,andthepowercorddisconnected.

Checklist:

1. Checkexteriorcoversfordamage(loose,broken,orsharpedges).

2. Turnoffthecomputer.Disconnectthepowercord.

3. Checkthepowercordfor:

a. Athird-wiregroundconnectoringoodcondition.Useametertomeasure

third-wiregroundcontinuityfor0.1ohmorlessbetweentheexternal

groundpinandtheframeground.

b. Thepowercordshouldbethetypespeciedinthepartslist.

c. Insulationmustnotbefrayedorworn.

4. Checkforcrackedorbulgingbatteries.

5. Removethecover.

6. Checkforanyobviousnon-Lenovoalterations.Usegoodjudgmentastothe

safetyofanynon-Lenovoalterations.

7. Check insidethe unitfor anyobviousunsafeconditions,suchasmetal

filings,contamination,waterorotherliquids,orsignsoffireorsmoke

damage.

8. Checkforworn,frayed,orpinchedcables.

9. Checkthatthepower-supplycover fasteners(screwsorrivets)havenot

beenremovedortamperedwith.

6

U31-70 Hardware Maintenance Manual

Handling devices that are sensitive to electrostatic discharge

Anycomputerpartcontainingtransistorsorintegratedcircuits(ICs)shouldbe

consideredsensitivetoelectrostaticdischarge(ESD).ESDdamagecanoccur

whenthere isa differenceinchargebetween objects.Protect againstESD

damagebyequalizingthechargesothatthemachine,thepart,theworkmat,

andthepersonhandlingthepartareallatthesamecharge.

Notes:

1. Use product-specific ESD procedures when they exceed the requirements

noted here.

2. Make sure that the ESD protective devices you use have been certied (ISO

9000) as fully effective.

WhenhandlingESD-sensitiveparts:

• Keepthepartsinprotectivepackagesuntiltheyareinsertedintotheproduct.

• Avoidcontactwithotherpeople.

• Wearagroundedwriststrapagainstyourskintoeliminate staticonyour

body.

• Preventthepartfromtouchingyourclothing.Mostclothingisinsulativeand

retainsachargeevenwhenyouarewearingawriststrap.

• Usetheblacksideofagroundedworkmattoprovideastatic-freework

surface.ThematisespeciallyusefulwhenhandlingESD-sensitivedevices.

• Selectagroundingsystem,suchasthoselistedbelow,toprovideprotection

thatmeetsthespecicservicerequirement.

Note:

The use of a grounding system to guard against ESD damage is desirable but not

necessary.

– AttachtheESDgroundcliptoanyframeground,groundbraid,orgreen-

wireground.

– Whenworkingonadouble-insulatedorbattery-operatedsystem,usean

ESDcommongroundorreferencepoint.Youcanusecoaxorconnector-

outsideshellsonthesesystems.

– Usetheroundgroundprongoftheacplugonac-operatedcomputers.

Grounding requirements

Electricalgroundingofthecomputerisrequiredforoperatorsafetyandcorrect

systemfunction.Propergroundingoftheelectricaloutletcanbeveriedbya

certiedelectrician.

7

Safety information

Safety notices: multilingual translations

Thesafetynoticesin thissection areprovidedinEnglish,French,German,

Hebrew,Italian,Japanese,andSpanish.

Safety notice 1

Before the computer is powered on after FRU replacement, make sure all screws,

springs, and other small parts are in place and are not left loose inside the

computer. Verify this by shaking the computer and listening for rattling sounds.

Metallic parts or metal akes can cause electrical shorts.

Avant de remettre l’ordinateur sous tension après remplacement d’une unité en

clientèle, vériez que tous les ressorts, vis et autres pièces sont bien en place et

bien xées. Pour ce faire, secouez l’unité et assurez-vous qu’aucun bruit suspect

ne se produit. Des pièces métalliques ou des copeaux de métal pourraient causer

un court-circuit.

Bevor nach einem FRU-Austausch der Computer wieder angeschlossen wird,

muß sichergestellt werden, daß keine Schrauben, Federn oder andere Kleinteile

fehlen oder im Gehäuse vergessen wurden. Der Computer muß geschüttelt und auf

Klappergeräusche geprüft werden. Metallteile oder-splitter können Kurzschlüsse

erzeugen.

Prima di accendere l’elaboratore dopo che é stata effettuata la sostituzione di una

FRU, accertarsi che tutte le viti, le molle e tutte le altri parti di piccole dimensioni

siano nella corretta posizione e non siano sparse all’interno dell’elaboratore.

Vericare ciò scuotendo l’elaboratore e prestando attenzione ad eventuali rumori;

eventuali parti o pezzetti metallici possono provocare cortocircuiti pericolosi.

Antes de encender el sistema despues de sustituir una FRU, compruebe que

todos los tornillos, muelles y demás piezas pequeñas se encuentran en su sitio

y no se encuentran sueltas dentro del sistema. Compruébelo agitando el sistema

y escuchando los posibles ruidos que provocarían. Las piezas metálicas pueden

causar cortocircuitos eléctricos.

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U31-70 Hardware Maintenance Manual

Safety notice 2

DANGER

Some standby batteries contain a small amount of nickel and cadmium. Do not

disassemble a standby battery, recharge it, throw it into fire or water, or short-

circuit it. Dispose of the battery as required by local ordinances or regulations.

Use only the battery in the appropriate parts listing. Use of an incorrect battery can

result in ignition or explosion of the battery.

Certaines batteries de secours contiennent du nickel et du cadmium. Ne les

démontez pas, ne les rechargez pas, ne les exposez ni au feu ni à l’eau. Ne

les mettez pas en court-circuit. Pour les mettre au rebut, conformez-vous à la

réglementation en vigueur. Lorsque vous remplacez la pile de sauvegarde ou celle

de l’horloge temps réel, veillez à n’utiliser que les modèles cités dans la liste de

pièces détachées adéquate. Une batterie ou une pile inappropriée risque de prendre

feu ou d’exploser.

Die Bereitschaftsbatterie, die sich unter dem Diskettenlaufwerk befindet,

kann geringe Mengen Nickel und Cadmium enthalten. Sie darf nicht zerlegt,

wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden.

Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim

Ersetzen der Bereitschafts-oder Systembatterie nur Batterien des Typs verwenden,

der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu

Entzündung oder Explosion führen.

Alcune batterie di riserva contengono una piccola quantità di nichel e cadmio.

Non smontarle, ricaricarle, gettarle nel fuoco o nell’acqua né cortocircuitarle.

Smaltirle secondo la normativa in vigore (DPR 915/82, successive disposizioni e

disposizioni locali). Quando si sostituisce la batteria dell’RTC (real time clock) o

la batteria di supporto, utilizzare soltanto i tipi inseriti nell’appropriato Catalogo

parti. L’impiego di una batteria non adatta potrebbe determinare l’incendio o

l’esplosione della batteria stessa.

Algunas baterías de reserva contienen una pequeña cantidad de níquel y cadmio.

No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite.

Deséchelas tal como dispone la normativa local. Utilice sólo baterías que se

encuentren en la lista de piezas. La utilización de una batería no apropiada puede

provocar la ignición o explosión de la misma.

9

Safety information

Safety notice 3

DANGER

The battery pack contains small amounts of nickel. Do not disassemble it, throw

it into re or water, or short-circuit it. Dispose of the battery pack as required by

local ordinances or regulations. Use only the battery in the appropriate parts listing

when replacing the battery pack. Use of an incorrect battery can result in ignition

or explosion of the battery.

La batterie contient du nickel. Ne la démontez pas, ne l’exposez ni au feu ni à l’eau.

Ne la mettez pas en court-circuit. Pour la mettre au rebut, conformez-vous à la

réglementation en vigueur. Lorsque vous remplacez la batterie, veillez à n’utiliser

que les modèles cités dans la liste de pièces détachées adéquate. En effet, une

batterie inappropriée risque de prendre feu ou d’exploser.

Akkus enthalten geringe Mengen von Nickel. Sie dürfen nicht zerlegt,

wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden.

Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim

Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste

aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion

führen.

La batteria contiene piccole quantità di nichel. Non smontarla, gettarla nel fuoco

o nell’acqua né cortocircuitarla. Smaltirla secondo la normativa in vigore (DPR

915/82, successive disposizioni e disposizioni locali). Quando si sostituisce la

batteria, utilizzare soltanto i tipi inseriti nell’appropriato Catalogo parti. L’impiego

di una batteria non adatta potrebbe determinare l’incendio o l’esplosione della

batteria stessa.

Las baterías contienen pequeñas cantidades de níquel. No las desmonte, ni

recargue, ni las eche al fuego o al agua ni las cortocircuite. Deséchelas tal como

dispone la normativa local. Utilice sólo baterías que se encuentren en la lista de

piezas al sustituir la batería. La utilización de una batería no apropiada puede

provocar la ignición o explosión de la misma.

10

U31-70 Hardware Maintenance Manual

Safety notice 4

DANGER

The lithium battery can cause a fire, an explosion, or a severe burn. Do not

recharge it, remove its polarized connector, disassemble it, heat it above 100°C

(212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as

required by local ordinances or regulations. Use only the battery in the appropriate

parts listing. Use of an incorrect battery can result in ignition or explosion of the

battery.

La pile de sauvegarde contient du lithium. Elle présente des risques d’incendie,

d’explosion ou de brûlures graves. Ne la rechargez pas, ne retirez pas son

connecteur polarisé et ne la démontez pas. Ne l’exposez pas à une temperature

supérieure à 100°C, ne la faites pas brûler et n’en exposez pas le contenu à l’eau.

Mettez la pile au rebut conformément à la réglementation en vigueur. Une pile

inappropriée risque de prendre feu ou d’exploser.

Die Systembatterie ist eine Lithiumbatterie. Sie kann sich entzünden, explodieren

oder schwere Verbrennungen hervorrufen. Batterien dieses Typs dürfen nicht

aufgeladen, zerlegt, über 100 C erhitzt oder verbrannt werden. Auch darf ihr

Inhalt nicht mit Wasser in Verbindung gebracht oder der zur richtigen Polung

angebrachte Verbindungsstecker entfernt werden. Bei der Entsorgung die örtlichen

Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien

des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher

Batterien kann zu Entzündung oder Explosion führen.

La batteria di supporto e una batteria al litio e puo incendiarsi, esplodere o

procurare gravi ustioni. Evitare di ricaricarla, smontarne il connettore polarizzato,

smontarla, riscaldarla ad una temperatura superiore ai 100 gradi centigradi,

incendiarla o gettarla in acqua. Smaltirla secondo la normativa in vigore (DPR

915/82, successive disposizioni e disposizioni locali). L’impiego di una batteria

non adatta potrebbe determinare l’incendio o l’esplosione della batteria stessa.

La batería de repuesto es una batería de litio y puede provocar incendios,

explosiones o quemaduras graves. No la recargue, ni quite el conector polarizado,

ni la desmonte, ni caliente por encima de los 100°C (212°F), ni la incinere ni

exponga el contenido de sus celdas al agua. Deséchela tal como dispone la

normativa local.

11

Safety information

Safety notice 5

If the LCD breaks and the uid from inside the LCD gets into your eyes or on your

hands, immediately wash the affected areas with water at least for 15 minutes.

Seek medical care if any symptoms caused by the uid are present after washing.

Si le panneau d’afchage à cristaux liquides se brise et que vous recevez dans les

yeux ou sur les mains une partie du uide, rincez-les abondamment pendant au

moins quinze minutes. Consultez un médecin si des symptômes persistent après le

lavage.

Die Leuchtstoffröhre im LCD-Bildschirm enthält Quecksilber. Bei der Entsorgung

die örtlichen Bestimmungen für Sondermüll beachten. Der LCD-Bildschirm

besteht aus Glas und kann zerbrechen, wenn er unsachgemäß behandelt wird

oder der Computer auf den Boden fällt. Wenn der Bildschirm beschädigt ist und

die darin befindliche Flüssigkeit in Kontakt mit Haut und Augen gerät, sollten

die betroffenen Stellen mindestens 15 Minuten mit Wasser abgespült und bei

Beschwerden anschließend ein Arzt aufgesucht werden.

Nel caso che caso l’LCD si dovesse rompere ed il liquido in esso contenuto

entrasse in contatto con gli occhi o le mani, lavare immediatamente le parti

interessate con acqua corrente per almeno 15 minuti; poi consultare un medico se i

sintomi dovessero permanere.

Si la LCD se rompe y el uido de su interior entra en contacto con sus ojos o sus

manos, lave inmediatamente las áreas afectadas con agua durante 15 minutos

como mínimo. Obtenga atención medica si se presenta algún síntoma del uido

despues de lavarse.

12

U31-70 Hardware Maintenance Manual

Safety notice 6

DANGER

To avoid shock, do not remove the plastic cover that protects the lower part of the

inverter card.

An d’éviter tout risque de choc électrique, ne retirez pas le cache en plastique

protégeant la partie inférieure de la carte d’alimentation.

Aus Sicherheitsgründen die Kunststoffabdeckung, die den unteren Teil der

Spannungswandlerplatine umgibt, nicht entfernen.

Per evitare scosse elettriche, non rimuovere la copertura in plastica che avvolge la

parte inferiore della scheda invertitore.

Para evitar descargas, no quite la cubierta de plástico que rodea la parte baja de la

tarjeta invertida.

Safety notice 7

DANGER

Though the main batteries have low voltage, a shorted or grounded battery can

produce enough current to burn personnel or combustible materials.

Bien que le voltage des batteries principales soit peu élevé, le court-circuit ou la

mise à la masse d’une batterie peut produire sufsamment de courant pour brûler

des matériaux combustibles ou causer des brûlures corporelles graves.

Obwohl Hauptbatterien eine niedrige Spannung haben, können sie doch bei

Kurzschluß oder Erdung genug Strom abgeben, um brennbare Materialien zu

entzünden oder Verletzungen bei Personen hervorzurufen.

Sebbene le batterie di alimentazione siano a basso voltaggio, una batteria in

corto circuito o a massa può fornire corrente sufficiente da bruciare materiali

combustibili o provocare ustioni ai tecnici di manutenzione.

Aunque las baterías principales tienen un voltaje bajo, una batería cortocircuitada

o con contacto a tierra puede producir la corriente suciente como para quemar

material combustible o provocar quemaduras en el personal.

13

Safety information

Safety notice 8

DANGER

Before removing any FRU, turn off the computer, unplug all power cords from

electrical outlets, remove the battery pack, and then disconnect any interconnecting

cables.

Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension,

débranchez tous les cordons d’alimentation des socles de prise de courant, retirez

la batterie et déconnectez tous les cordons d’interface.

Die Stromzufuhr muß abgeschaltet, alle Stromkabel aus der Steckdose gezogen,

der Akku entfernt und alle Verbindungskabel abgenommen sein, bevor eine FRU

entfernt wird.

Prima di rimuovere qualsiasi FRU, spegnere il sistema, scollegare dalle prese

elettriche tutti i cavi di alimentazione, rimuovere la batteria e poi scollegare i cavi

di interconnessione.

Antes de quitar una FRU, apague el sistema, desenchufe todos los cables de

las tomas de corriente eléctrica, quite la batería y, a continuación, desconecte

cualquier cable de conexión entre dispositivos.

14

U31-70 Hardware Maintenance Manual

Laser compliance statement

SomemodelsofLenovocomputerareequippedfromthefactorywithan

opticalstorage devicesuchasaCD-ROMdriveor aDVD-ROM drive.Such

devicesarealsosoldseparatelyasoptions.Ifoneofthesedrivesisinstalled,

itiscertiedintheU.S.toconformto therequirementsoftheDepartmentof

HealthandHumanServices21CodeofFederalRegulations(DHHS21CFR)

SubchapterJforClass1laserproducts.Elsewhere,the driveis certifiedto

conformtotherequirements ofthe InternationalElectrotechnicalCommission

(IEC)825andCENELECEN60825forClass1laserproducts.

IfaCD-ROMdrive,aDVD-ROMdrive,oranotherlaserdeviceisinstalled,note

thefollowing:

CAUTION

Use of controls or adjustments or performance of procedures other than those

specied herein might result in hazardous radiation exposure.

O uso de controles, ajustes ou desempenho de procedimentos diferentes daqueles

aqui especicados pode resultar em perigosa exposição à radiação.

Pour éviter tout risque d’exposition au rayon laser, respectez les consignes de

réglage et d’utilisation des commandes, ainsi que les procédures décrites.

Werden Steuer- und Einstellelemente anders als hier festgesetzt verwendet, kann

gefährliche Laserstrahlung auftreten.

L’utilizzo di controlli, regolazioni o l’esecuzione di procedure diverse da quelle

specicate possono provocare l’esposizione a.

El uso de controles o ajustes o la ejecución de procedimientos distintos de los aquí

especicados puede provocar la exposición a radiaciones peligrosas.

OpeningtheCD-ROMdrive,theDVD-ROMdrive,oranyotheropticalstorage

devicecouldresultinexposuretohazardouslaser radiation.Thereareno

serviceablepartsinsidethosedrives.Do not open.

15

Safety information

ACD-ROMdrive,aDVD-ROMdrive,oranyotherstoragedeviceinstalledmay

containanembeddedClass3AorClass3Blaserdiode.Notethefollowing:

DANGER

Emits visible and invisible laser radiation when open. Do not stare into the beam,

do not view directly with optical instruments, and avoid direct exposure to the

beam.

Radiação por raio laser ao abrir. Não olhe fixo no feixe de luz, não olhe

diretamente por meio de instrumentos óticos e evite exposição direta com o feixe

de luz.

Rayonnement laser si carter ouvert. Évitez de fixer le faisceau, de le regarder

directement avec des instruments optiques, ou de vous exposer au rayon.

Laserstrahlung bei geöffnetem Gerät. Nicht direkt oder über optische Instrumente

in den Laserstrahl sehen und den Strahlungsbereich meiden.

Kinyitáskor lézersugár ! Ne nézzen bele se szabad szemmel, se optikai

eszközökkel. Kerülje a sugárnyalábbal való érintkezést!

Aprendo l’unità vengono emesse radiazioni laser. Non fissare il fascio, non

guardarlo direttamente con strumenti ottici e evitare l’esposizione diretta al fascio.

Radiación láser al abrir. No mire jamente ni examine con instrumental óptico el

haz de luz. Evite la exposición directa al haz.

16

U31-70 Hardware Maintenance Manual

Important service information

Thischapterpresentsthefollowingimportantserviceinformation:

• “StrategyforreplacingFRUs”onpage16

– “Strategyforreplacingaharddiskdrive”onpage17

– “Importantnoticeforreplacingasystemboard”onpage17

• “ImportantinformationaboutreplacingRoHScompliantFRUs”onpage18

Important:

BIOS and device driver xes are customer-installable. The BIOS and device drivers

are posted on the customer support site:

http://support.lenovo.com.



Strategy for replacing FRUs

Before replacing parts:

Makesurethatall softwarexes, drivers,andBIOSdownloadsareinstalled

beforereplacinganyFRUslistedinthismanual.

Afterasystemboardisreplaced,ensurethatthelatestBIOSisloadedtothe

systemboardbeforecompletingtheserviceaction.

Todownloadsoftwarexes,drivers,andBIOS,followthestepsbelow:

1. Gotohttp://support.lenovo.com.

2. Enterthe serialnumber orselect aproduct oruseLenovosmart

downloading.

3. SelecttheBIOS/Driver/Applicationsanddownload.

4. Followthedirectionsonthescreenandinstallthenecessarysoftware.

17

Important service information

Usethefollowingstrategytopreventunnecessaryexpenseforreplacingand

servicingFRUs:

• IfyouareinstructedtoreplaceanFRU,butthereplacementdoesnotsolve

theproblem,reinstalltheoriginalFRUbeforeyoucontinue.

• Somecomputers havebothaprocessorboardand asystem board.Ifyou

areinstructedtoreplaceeitherofthem,andreplacingoneofthemdoesnot

solvetheproblem,reinstallthatboard,andthenreplacetheotherone.

• IfanadapteroradeviceconsistsofmorethanoneFRU,anyoftheFRUs

maybethecauseofthe error.Beforereplacingtheadapter ordevice,

removetheFRUsonebyonetoseeifthesymptomschange.Replaceonly

theFRUthatchangedthesymptoms.

Attention:Thesetup configurationonthecomputeryouareservicingmay

havebeencustomized.RunningAutomaticConfiguration mayalter the

settings.Notethecurrentcongurationsettings(usingtheViewConguration

option);then,whenservice hasbeen completed,verifythatthosesettings

remainineffect.

Strategy for replacing a hard disk drive

Alwaystrytorun alow-level formatbeforereplacingaharddiskdrive.This

willcauseallcustomerdataontheharddisk tobe lost.Make surethatthe

customerhasacurrentbackupofthedatabeforeperformingthisaction.

Attention:Thedrivestartupsequenceinthecomputeryouareservicingmay

havebeenchanged.Beextremelycareful duringwrite operationssuch as

copying,saving,orformatting.Ifyouselectanincorrectdrive,dataorprograms

canbeoverwritten.

Important notice for replacing a system board

Somecomponentsmountedon asystem boardare verysensitive. Improper

handlingcancausedamagetothosecomponents,andmaycauseasystem

malfunction.

Attention:Whenhandlingasystemboard:

• Donotdropthesystemboardorapplyanyexcessiveforcetoit.

• Avoidroughhandlingofanykind.

• Avoidbendingthe systemboardandhardpushingtopreventcrackingat

eachBGA(BallGridArray)chipset.

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U31-70 Hardware Maintenance Manual

Important information about replacing RoHS compliant FRUs

RoHS, The Restriction of Hazardous Substances in Electrical and

Electronic Equipment Directive (2002/95/EC) is a European Union legal

requirement affecting the global electronics industry. RoHS requirements

must be implemented on Lenovo products placed on the market after

June 2006. Products on the market before June 2006 are not required to

have RoHS compliant parts. If the original FRU parts are non-compliant,

replacement parts can also be non-compliant. In all cases if the original

FRU parts are RoHS compliant, the replacement part must also be RoHS

compliant.

Note:RoHSandnon-RoHSFRUpartnumberswiththesametandfunction

areidentiedwithuniqueFRUpartnumbers.

Lenovoplans totransit toRoHScompliancewellbefore theimplementation

dateandexpectsits supplierstobereadytosupportLenovo’srequirements

andscheduleintheEU.Productssoldin2005and2006will containsome

RoHScompliantFRUs.Thefollowingstatementpertainstotheseproductsand

anyproductLenovoproducescontainingRoHScompliantFRUs.

RoHScompliant FRUshaveuniqueFRUpartnumbers.Before orafterthe

RoHSimplementationdate,failedRoHScompliantpartsmustalwaysbe

replacedwithRoHScompliantones,soonlytheFRUsidentiedascompliant

inthesystemHMMordirectsubstitutionsforthoseFRUsmaybeused.

Products marketed before June 2006 Products marketed after June 2006

Current or

original part

Replacement FRU Current or

original part

Replacement FRU

Non-RoHS CanbeNon-RoHS

MustbeRoHS MustbeRoHS

Non-RoHS CanbeRoHS

Non-RoHS CansubtoRoHS

RoHS MustbeRoHS

Note:AdirectsubstitutionisapartwithadifferentFRUpartnumberthatis

automaticallyshippedbythedistributioncenteratthetimeoftheorder.

19

General checkout

General checkout

Thischapterpresentsthefollowinginformation:

• “Whattodorst”onpage20

• “Powersystemcheckout”onpage21

Beforeyougotothecheckout,makesuretoreadthefollowingimportantnotes:

Important notes:

• Onlycertiedtrainedpersonnelcanservicethecomputer.

• BeforereplacinganyFRU, readthe entirepageonremovingandreplacing

FRUs.

• CarefullyremovescrewsforreusewhenreplacingFRUs.

• Beextremelycarefulduringsuchwriteoperationsascopying,saving,or

formatting. Drives in the computer that you are servicing sequence might

have been altered. If you select an incorrect drive, data or programs might be

overwritten.

• ReplaceanFRUonlywithanotherFRUofthecorrectmodel. When you

replace an FRU, make sure that the machine model and the FRU part number are

correct by referring to the FRU parts list.

• AnFRUshouldnotbereplacedjustbecauseofasingle,unreproduciblefailure.

Single failures can occur for a variety of reasons that have nothing to do with a

hardware defect, such as cosmic radiation, electrostatic discharge, or software

errors. Consider replacing an FRU only when a problem recurs. If you suspect that

an FRU is defective, clear the error logs and run the test again. If the error does

not recur, do not replace the FRU.

• BecarefulnottoreplaceanondefectiveFRU.

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U31-70 Hardware Maintenance Manual

What to do rst

WhenyoudoreturnanFRU,youmustincludethefollowinginformationinthe

partsexchangeformorpartsreturnformthatyouattachtoit:

1. Nameandphonenumberofservicer

2. Dateofservice

3. Dateonwhichthemachinefailed

4. Dateofpurchase

5. ProcedureindexandpagenumberinwhichthefailingFRUwasdetected

6. FailingFRUnameandpartnumber

7. Machinetype,modelnumber,andserialnumber

8. Customer’snameandaddress

Note for warranty:During thewarrantyperiod,thecustomer maybe

responsiblefor repaircosts ifthe computerdamagewascausedbymisuse,

accident,modification,unsuitablephysicaloroperatingenvironment,or

impropermaintenancebythecustomer.

Thefollowingisa listof somecommon itemsthatarenotcoveredunder

warrantyandsomesymptoms thatmight indicatethat thesystemwas

subjectedtostressbeyondnormaluse.

Beforecheckingproblemswiththecomputer,determinewhetherthedamageis

coveredunderthewarrantybyreferringtothefollowinglist:

The following are not covered under warranty:

• LCDpanelcrackedfromtheapplicationofexcessive forceor frombeing

dropped

• Scratched(cosmetic)parts

• Distortion,deformation,ordiscolorationofthecosmeticparts

• Plasticparts,latches,pins,orconnectorsthathavebeencrackedorbroken

byexcessiveforce

• Damagecausedbyliquidspilledintothesystem

• DamagecausedbytheimproperinsertionofaPCCardortheinstallationof

anincompatiblecard

• Improperdiskinsertionoruseofanopticaldrive

• Diskettedrivedamagecausedbypressure onthe diskettedrive cover,

foreignmaterialinthedrive,ortheinsertionofadiskettewithmultiplelabels

• Damagedorbentdisketteejectbutton

• Fusesblownbyattachmentofanonsupporteddevice

• Forgottencomputerpassword(makingthecomputerunusable)

• Stickykeyscausedbyspillingaliquidontothekeyboard

• UseofanincorrectACadapteronlaptopproducts

The following symptoms might indicate damage caused by nonwarranted

activities:

• Missingpartsmightbeasymptomofunauthorizedserviceormodication.

• Ifthespindleofaharddiskdrivebecomesnoisy,itmayhavebeensubjected

toexcessiveforce,ordropped.

21

General checkout

Power system checkout

Toverifyasymptom,followthestepsbelow:

1. Turnoffthecomputer.

2. Removethebatterypack.

3. ConnecttheACadapter.

4. Makesurethatpowerissuppliedwhenyouturnonthecomputer.

5. Turnoffthecomputer.

6. DisconnecttheACadapterandinstallthechargedbatterypack.

7. Makesurethatthebatterypacksuppliespowerwhenyouturnonthe

computer.

Ifyoususpectapowerproblem,seetheappropriateoneofthefollowingpower

supplycheckouts:

• “CheckingtheACadapter”onpage21

• “Checkingoperationalcharging”onpage21

• “Checkingthebatterypack”onpage22

Checking the AC adapter

YouareherebecausethecomputerfailsonlywhentheACadapterisused.

• Ifthepower-onindicatordoesnotturnon,checkthepowercordoftheAC

adapterforcorrectcontinuityandinstallation.

• Ifthecomputerdoes notcharge duringoperation,goto“Checking

operationalcharging”.

TochecktheACadapter,followthestepsbelow:

1. UnplugtheACadaptercablefromthecomputer.

2. MeasuretheoutputvoltageattheplugoftheACadaptercable.See the

followinggure:

1

2

Voltage (V DC)

+20

0

Pin

1

2

Note:OutputvoltagefortheACadapterpinNo.2maydifferfromtheoneyou

areservicing.

3. Ifthevoltageisnotcorrect,replacetheACadapter.

4. Ifthevoltageisacceptable,dothefollowing:

• Replacethesystemboard.

• Iftheproblempersists,goto“LenovoU31-70”onpage26.

Note:NoisefromtheACadapterdoesnotalwaysindicateadefect.

Checking operational charging

Tocheckwhetherthebatterychargesproperly duringoperation,usea

dischargedbatterypackorabatterypackthathaslessthan50%ofthetotal

powerremainingwheninstalledinthecomputer.

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U31-70 Hardware Maintenance Manual

Performoperationalcharging.Ifthebatterystatus indicatoror icondoesnot

lighton,removethebatterypackandletitreturntoroomtemperature.Reinstall

thebatterypack.Ifthechargeindicatororicon isstilloff,replacethebattery

pack.

Ifthechargeindicator stilldoesnotlighton,replacethesystemboard.Then

reinstallthebatterypack.Ifitisstillnotcharged,gotothenextsection.

Checking the battery pack

BatterychargingdoesnotstartuntilthePowerMetershowsthatlessthan95%

ofthetotalpowerremains;underthisconditionthebatterypackcanchargeto

100%ofitscapacity.Thisprotectsthebatterypackfrombeingoverchargedor

fromhavingashortenedlife.

Tocheckyourbattery,moveyourcursortothe PowerMeter iconintheicon

trayoftheWindows®taskbarandwaitforamoment(butdonotclickit),andthe

percentageofbatterypowerremainingisdisplayed.Togetdetailedinformation

aboutthebattery,double-clickthePowerMetericon.

Note:Ifthebatterypackbecomeshot,itmaynotbe ableto becharged.

Removeitfromthecomputerandleaveitatroomtemperatureforawhile.After

itcoolsdown,reinstallandrechargeit.

23

Related service information

Related service information

Thischapterpresentsthefollowinginformation:

• “RestoringthefactorycontentsbyusingOneKeyRecovery”onpage23

• “Passwords”onpage24

• “Powermanagement”onpage25

Restoring the factory contents by using OneKey Recovery

Restore of factory default

TheLenovo U31-70computers comewithpre-installed OneKeyRecovery

System.Inordertosaveapplicationfilesandtheinitialbackedupfiles

ofthesystem,theharddiskinaLenovocomputerincludes ahidden

partitionwhenitis shipped.If youneed torestore thesystemtothe

pointofyourfirstbootup,justenterLenovoOneKeyRecoverySystem

andrunSystem Recovery.FordetailsofOneKeyRecoverySystem,

seethe User Guide for Lenovo OneKey Recovery system.

Note: This will delete all the new data on the system partition (C drive), which

is not recoverable. Make sure to back up your critical data before you perform this

action.

Whenyouusetherecoverydiscstobootyourcomputer,thesystemwillenter

theuserinterfaceforsystem recoveryautomatically.Pleasefollowtheprompt

toinsertthebackupdiscstocompletethewholerecoveryprocess.

Note:The recovery process might take up to 2 hours.

24

U31-70 Hardware Maintenance Manual

Passwords

Asmany asthree passwordsmaybeneededforanyLenovo computer:

thepower-onpassword(POP), thehard diskpassword(HDP),andthe

administratorpassword.

Ifanyofthesepasswordshasbeenset,apromptforitappearsonthescreen

wheneverthecomputeristurnedon.Thecomputerdoesnotstartuntilthe

passwordisentered.

Power-on password

Apower-onpassword(POP)protectsthesystemfrombeingpoweredonby

anunauthorized person.Thepasswordmust beenteredbefore anoperating

systemcanbebooted.

Hard-disk password

Therearetwohard-diskpasswords(HDPs):

+UserHDP-fortheuser

+MasterHDP-for thesystemadministrator, whocanuseittogetaccessto

theharddiskdriveeveniftheuserhaschangedtheuserHDP

Attention:IftheuserHDPhasbeen forgotten,check whethera masterHDP

hasbeenset.Ifithas,itcanbeusedforaccesstotheharddiskdrive.If

nomasterHDPisavailable, neitherLenovo norLenovoauthorizedservice

techniciansprovideanyservicestoreseteithertheuserorthemasterHDP,or

torecoverdatafromtheharddiskdrive.Thehard diskdrive canbereplaced

forascheduledfee.

Administrator password

Administratorpasswordcontrolstheaccessofthewholesetuputility.Only

aftertheAdministratorpasswordhasbeensetcantheUserpasswordbeset.If

Administratorpasswordwascleared,theUserpasswordwasclearedtoo.

25

Related service information

Power management

Note:PowermanagementmodesarenotsupportedforAPMoperatingsystem.

Toreduce powerconsumption, thecomputerhasthreepower management

modes:screenblank,sleep(standby),andhibernation.

Screen blank state

Ifthetimesetonthe“Turnoffmonitor”timerinthe operatingsystem expires,

theLCDbacklightturns off.Youcan alsoturnofftheLCDbacklightby

pressing .

Toendscreenblankstateandresumenormaloperation,pressanykeyonthe

keyboard.

Putting the computer to sleep or shutting it down

Whenyouhavenishedworkingwithyourcomputer,youcanputittosleepor

shutitdown.

Putting your computer to sleep

Ifyouwillbeawayfromyourcomputerforonlyashorttime,putthecomputerto

sleep.Whenthecomputerisinsleepmode,youcanquicklywakeittoresume

use,bypassingthestartupprocess.Toputthecomputertosleep,dooneofthe

following:

• Closethedisplaypanel.

• Pressthepowerbutton.

• OpentheCharmsandthenselectSettings → Power → Sleep.

Attention:Waituntilthe powerindicatorlightstartsblinking(indicatingthat

thecomputerisinsleepmode)before youmoveyourcomputer.Movingyour

computerwhile thehard diskisspinningcandamagetheharddisk,causing

lossofdata.

Towakethecomputer,dooneofthefollowing:

• Pressanykeyonthekeyboard.

• Pressthepowerbutton.

Shutting down the computer

Ifyouarenotgoingtouseyourcomputerforalongtime,shutitdown.Toshut

downyourcomputer:

• Openthecharmsbar,thenselectSettings → Power → Shut down.

• Right-clicktheStartbuttoninthelower-leftcornerandselectShut down or

sign out→Shut down.

• Select → Shut downintheupper-rightcorneroftheStartscreen.

Note:TheoperationdependsontheBIOSsetup.Pleaserefertotheactualproduct.

26

U31-70 Hardware Maintenance Manual

Lenovo U31-70

Thischapter presentsthefollowingproduct-specificservice referencesand

product-specicpartsinformation:

• “Specications”onpage26

• “Statusindicators”onpage28

• “Hotkeys”onpage29

• “FRUreplacementnotices”onpage30

• “RemovingandreplacinganFRU”onpage31

• “Locations”onpage60

• “Partslist”onpage62

Specications

ThefollowingtableliststhespecificationsoftheLenovoU31-70:

Table 1. Specications

Feature Description

Processor • Seethesystempropertiesofyourcomputer,youcandothisas

follows:

 OpentheControl Panel,andthenselectSystem and

Security→System.

Busarchitecture

• 1600MhzDDR3LSDRAM

• PCIExpressbus2.0

• SerialATA6GB/s

• USB3.0

• USB2.0

• HDMI1.4

• eDP1.3

Graphicmemory

chip

• IntegratedGraphics:GT2,ReservedforGT3

• DiscreteGraphics:Integrated/NvidiaN16v-GM

Display • 13.3-inch16:9,1,366×768pixelsHD/1,920×1,080pixels

FHD

Standard

memory • DDR3L-1600MHz,SODIMM×1(max8GB)

CMOSRAM • 8MByte

Harddiskdrive • 2.5-inch,5mm/7mm,SATAIII

• 256SSD

• 500GB,5400rpm

• HYBRID500GB/1TB5400rpmSSHD(8GB)

I/Oport • Comboaudiojack×1

• RJ-45×1

• HDMIport×1

• USB2.0port×1,USB3.0port×2

• 4in1slot×1(SD/SDHC/SDXC/MMC)

Audio • 1/8"Comboaudiojack

• 1.5Wspeakers×2

• Single/ArrayDigitalMIC

27

Lenovo U31-70

Table 1. Specications (continued)

Feature Description

Ethernet(onthe

systemboard) • 1,000Mbps

Bluetooth

wireless • Combinedincombocard

Keyboard • 6-rowLenovoKeyboard

Touchpad • Multi-touchtype

Integrated

camera • HD

Battery • 2cells,35Wh

ACadapter • 20V,DiscreteGraphics65W,IntegratedGraphics45W

Pre-installed

operating

system

• DOS

• Windows8.1/10(orsimilarupdatein12months)

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U31-70 Hardware Maintenance Manual

Status indicators

Thesystemstatusindicatorsbelowshowthecomputerstatus:

12

Table 2. Status indicators

Indicator Indicator

status Meaning

1

Batterystatus

indicator

On(solidwhite) Thebatteryhasmorethan20%charge.

On(solidamber) Thebatteryhasbetween5%and20%

charge.

Blinkingquickly(amber) Thebatteryhaslessthan5%charge.

Blinkingslowly(amber)

Thebatteryisbeingcharged.When

thebatterychargereaches20%,the

blinkingcolorwillchangetowhite.

Blinkingslowly(white)

Thebatteryhasbetween20%and80%

chargeandisstillcharging.Whenthe

batteryreaches80%chargethelightwill

stopblinking,butchargingwillcontinue

untilthebatteryisfullycharged.

2

Powerstatus

indicator

On(solidwhite) Thecomputerispoweredon.

Blinking Thecomputerisinsleepmode.

Off Thecomputerispoweredoff.

29

Lenovo U31-70

Hotkeys

Youcanaccesscertainsystemsettingsquicklybypressingtheappropriate

hotkeys.

Table 3. Hotkeys

: Mutes/unmutesthesound.

: Decreasesthevolumelevel.

: Increasesthevolumelevel.

: Closesthecurrentlyactivewindow.

: Refreshesthedesktoporthecurrentlyactivewindow.

: Enables/disablesthetouchpad.

: Enables/disablesAirplanemode.

: Displaysallcurrentlyactiveapps.

: Turnson/offthebacklightoftheLCDscreen.

: Togglesthedisplaybetweenthecomputerandanexternaldevice.

: Decreasesthedisplaybrightness.

: Increasesthedisplaybrightness.

30

U31-70 Hardware Maintenance Manual

FRU replacement notices

Thissection presentsnoticesrelatedtoremoving andreplacingparts. Read

thissectioncarefullybeforereplacinganyFRU.

Screw notices

Loosescrewscancause areliability problem.IntheLenovocomputer,this

problemisaddressedwithspecialnylon-coatedscrewsthathavethefollowing

characteristics:

• Theymaintaintightconnections.

• Theydonoteasilycomeloose,evenwithshockorvibration.

• Theyarehardertotighten.

• Eachoneshouldbeusedonlyonce.

Dothefollowingwhenyouservicethismachine:

• Keepthescrewkitinyourtoolbag.

• CarefullyremovescrewsforreusewhenreplacingFRUs.

• Useatorquescrewdriverifyouhaveone.

Tightenscrewsasfollows:

• Plastic to plastic

 Turnanadditional90° afterthe screwhead touchesthe surfaceof the

plasticpart:

more than 90°

(Cross-section)

• Logic card to plastic

 Turnanadditional180°afterthescrewheadtouchesthesurfaceofthe

logiccard:

more than 180°

(Cross-section)

• Torque driver

 Ifyouhaveatorquescrewdriver,refertothe“Torque”columnforeachstep.

• Makesurethatyouusethecorrectscrews.Ifyouhaveatorquescrewdriver,

tightenallscrewsrmlytothetorqueshowninthetable.Carefully remove

screws for reuse when replacing FRUs. Make sure that all screws are

tightened rmly.

• Ensuretorque screwdriversarecalibratedcorrectlyfollowing country

specications.

31

Lenovo U31-70

Removing and replacing an FRU

Thissectionpresentsexplodedgures withtheinstructionstoindicatehowto

removeandreplacetheFRU.Makesuretoobservethefollowinggeneralrules:

1. Donotattempttoserviceanycomputerunlessyouhavebeentrainedand

certied.Anuntrainedpersonrunstheriskofdamagingparts.

2. BeforereplacinganyFRU,review“FRUreplacementnotices”onpage30.

3. Beginby removingany FRUsthat haveto beremoved beforethe failing

FRU.AnyofsuchFRUsarelistedatthetopofthepage.Removethemin

theorderinwhichtheyarelisted.

4. FollowthecorrectsequenceinthestepstoremovetheFRU,asgiveninthe

guresbythenumbersinsquarecallouts.

5. WhenturningascrewtoreplaceanFRU,turnitinthedirectionasgivenby

thearrowinthegure.

6. WhenremovingtheFRU,move itinthedirectionasgivenbythearrow in

thegure.

7. Toputthe newFRUinplace,reversetheremovalproceduresandfollow

anyofthenotesthatpertain toreplacement. Forinformation about

connectingandarranginginternalcables,see“Locations”onpage60.

8. WhenreplacinganFRU,usethecorrectscrewasshownintheprocedures.

DANGER

Before removing any FRU, turn off the computer, unplug all power cords from

electrical outlets, remove the battery pack, and then disconnect any of the

interconnecting cables.

Attention:AfterreplacinganFRU,donotturnonthecomputeruntilyouhave

madesurethatallscrews,springs,andothersmallpartsareinplaceandnone

areloose insidethe computer. Verify thisbyshakingthecomputer gentlyand

listeningforrattlingsounds.Metallic partsormetalakescancauseelectrical

shortcircuits.

Attention:Thesystem boardissensitiveto,andcanbe damagedby,

electrostaticdischarge. Beforetouchingit,establishpersonal groundingby

touchingagroundpointwithonehandorusinganelectrostaticdischarge(ESD)

strap(P/N6405959)toremovepotentialshockreasons.

32

U31-70 Hardware Maintenance Manual

1010 Base cover

Figure 1. Removal steps of base cover

Removethescrews1.

1

1

1

1

1

1

1

1

1

1

Step Screw (quantity) Color Torque

1M2×6mm,Phillips-head,nylok-coated(10)

loglow---logup&loglow---ioboard---logup

&loglow---mb---logup&loglow---rightside

hinge---logup&loglow---leftsidehinge---

klockbracket---logup

Black/

Silver

1.0~1.5kgf*cm

Removethebasecoverinthedirectionsshownbyarrows2and3.

2

2

3

33

Lenovo U31-70

Note: Applying labels to the base cover

ThenewbasecoverFRUis shippedwith akit containinglabels ofseveral

kinds.Whenyoureplace thebase cover, youneed toapply thefollowing

labels:

Thefollowinglabelsneedtobepeeledofffromtheoldbasecoverandputon

thenewbasecover.

a Ratinglabel

b Ratinglabel

c Ratinglabel

d GMLlabel

e KCClabel

f BISlabel

g Wlan/BTlabelforMalaysia/Indonesia

h Wlan/BTlabelforSouthAfrica

i Wlan/BTlabelforIsrael/US/CA/TW

j Wlan/BTlabelforBrazil

k IndonesiaDsidelabel

Forsomemodels,youalsoneedtoapplyoneortwoFCClabels.Checkthe

oldbasecover;ifithasoneortwoFCClabels,ndduplicatesoftheminthe

labelkitandapplythemtothenewbasecover.

Forthelocationofeachlabel,refertothefollowinggures:

ab

h

d

h

g g

c

e

ii

f

jj

k

34

U31-70 Hardware Maintenance Manual

1020 Battery pack

DANGER

Only use the battery specied in the parts list for your computer. Any other battery

could ignite or explode.

Foraccess,removethisFRU:

• “1010Basecover”onpage32

Figure 2. Removal steps of battery pack

Releasethespeakerscables fromthe cableguidesinthedirectionshownby

arrows1.

11

Detachthebatterypackconnectorinthedirectionshownbyarrow2,remove

thescrews3.

3

3

3

32

Step Screw (quantity) Color Torque

3M2×4mm,Phillips-head,nylok-coated(4)

battery---logup

Black 1.0~1.5kgf*cm

35

Lenovo U31-70

Figure 2. Removal steps of battery pack (continued)

Removethebatterypackinthedirectionshownbyarrow4.

4

36

U31-70 Hardware Maintenance Manual

1030 PCI Express Mini Card for wireless LAN

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

Figure 3. Removal steps of PCI Express Mini Card for wireless LAN

DisconnectthetwowirelessLANcables(black,white)1,andthenremovethe

screw2.

2

11

Instep1,unplugthejacksbyusingthe removaltoolantennaRFconnector

(P/N:08K7159),orpickuptheconnectorswithyourngersandgentlyunplug

theminthedirectionshownbythearrows.

Notes:ThewirelessLANcardhas2cablesinstep1.

 ThewirelessLANcardinsomemodelsmighthave3cablesinstep1.

Step Screw (quantity) Color Torque

2M2×2.5mm,Phillips-head,nylok-coated(1)

wirelesscard---logup

Silver 1.0~1.5kgf*cm

37

Lenovo U31-70

Figure 3. Removal steps of PCI Express Mini Card for wireless LAN (continued)

Removethecardinthedirectionshownbyarrow3.

3

When installing:

• Inmodelswitha wirelessLAN cardthathastwoantennaconnectors,plug

theblackcable(1st)(MAIN)intothejacklabeledMAIN,andthegreycable

(2nd)(AUX)intothejacklabeledAUXonthecard.

• InmodelswithawirelessLANcardthathasthreeantennaconnectors,plug

theblackcable(1st)(MAIN)intothejacklabeled1,thegreycable(3rd)into

thejacklabeled3,andthewhitecable(2nd)(AUX)intothejacklabeled2on

thecard.

38

U31-70 Hardware Maintenance Manual

1040 DIMM

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

Figure 4. Removal steps of DIMM

Releasethe twolatchesonbothedges ofthesocketatthesametime inthe

directionsshown byarrows 1,andthenunplugtheDIMMin thedirection

shownbyarrow2.

1 1

2

When installing:InsertthenotchedendoftheDIMMintothesocket.Pushthe

DIMMrmly,andpivotituntilitsnapsintoplace.Makesurethatitisrmlyxed

intheslotandisdifculttomove.

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Lenovo U31-70

1050 Speakers

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

Figure 5. Removal steps of speakers

Detachthespeakersconnectorinthedirectionshownbyarrow1.Removethe

screws2.Thenremovethespeakers3.

2

2

2

21

3

3

Step Screw (quantity) Color Torque

2M2×2mm,Phillips-head,nylok-coated(4)

speaker_l---logup&speaker_r---logup

Black 1.0~1.5kgf*cm

40

U31-70 Hardware Maintenance Manual

1060 Hard disk drive

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

• “1050Speakers”onpage39

Attention:

• Donotdropthehard diskdriveorapplyanyphysicalshockto it. The hard

disk drive is sensitive to physical shock. Improper handling can cause damage and

permanent loss of data.

• Before removing the drive, suggest the customer to backup all the information on

it if possible.

• Never remove the drive while the system is operating or in suspend mode.

Figure 6. Removal steps of hard disk drive

Removethescrews1.

1

1

1

1

Step Screw (quantity) Color Torque

1M2×4 mm,Phillips-head,nylok-coated(4)

hddbracket---logup

Black 1.0~1.5kgf*cm

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Lenovo U31-70

Figure 6. Removal steps of hard disk drive (continued)

DetachtheHDDconnectorinthedirectionshownbyarrow2.Removethe

harddiskdrivefromtheslotinthedirectionshownbyarrow3.

2

3

When installing:MakesurethattheHDDconnectorisattachedrmly.

Removethescrews4anddetachthemetalframefromtheharddiskdrive.

4

4

4

4

Step Screw (quantity) Color Torque

4M3×3mm,Phillips-head,nylok-coated(4)

hddbracket---hddmodule

Silver 1.5~2.0kgf*cm

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U31-70 Hardware Maintenance Manual

1070 Fan assembly and Heat Sink assembly

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

Figure 7. Removal steps of fan assembly and Heat Sink assembly

Releasethecablesfromthecableguidesinthedirectionshownbyarrows1.

1

1

When installing:Route theantenna cablesalongthecableguides.As you

routethecables,makesurethattheyarenotsubjectedtoanytension.Tension

couldcausethecablestobedamagedbythecableguides,orawiretobe

broken.

43

Lenovo U31-70

Figure 7. Removal steps of fan assembly and Heat Sink assembly (continued)

Unplugthefanconnectorinthedirectionshownbyarrow2. Removethe

screws3.

33

3

2

Step Screw (quantity) Color Torque

3M2×4mm,Phillipshead,nylok-coated(3)

fan---mb---logup&fan---logup

Black 1.0~1.5kgf*cm

When installing:Makesurethattheconnectorisattachedrmly.

Removethefaninthedirectionshownbyarrow4.Becarefulnottodamage

theconnector.

4

44

U31-70 Hardware Maintenance Manual

Figure 7. Removal steps of fan assembly and Heat Sink assembly (continued)

Removethescrews5.

555

5

5

Step Screw (quantity) Color Torque

5M2×4mm,Phillipshead,nylok-coated(5)

cputhermalmodule---cpuplate&vgathermal

module---MB

Black 1.0~1.5kgf*cm

Lifttheheatsinkinthedirectionshownbyarrows6.

6

6

45

Lenovo U31-70

Figure 7. Removal steps of fan assembly and Heat Sink assembly (continued)

ab

When installing: Before you attach the fan assembly to the computer, apply

thermal grease, at an amount of 0.2 grams, to the part shown in the gure

above. Either too much or too little grease application can cause a thermal

problem due to imperfect contact with a component.

Note:

• A new thermal module FRU is shipped with several gaskets. When you

replace the thermal module, you need to stick these gaskets on it.

• For the gaskets location, please refer to the following gures:

For discrete graphics (with 3 gaskets)

For integrated graphics (with 4 gaskets)

46

U31-70 Hardware Maintenance Manual

1080 IO board, DC-in cable

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

• “1070FanassemblyandHeatSinkassembly”onpage42

Figure 8. Removal steps of IO board, DC-in cable

DetachtheIOboardconnectorinthedirectionsshownbyarrows1and2.

Removethescrew3.

3

1

2

Step Screw (quantity) Color Torque

3M2×2.5mm,Phillips-head,nylok-coated(1)

ioboard---logup

Silver 1.0~1.5kgf*cm

When installing:Makesurethattheconnectorisattachedrmly.

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Lenovo U31-70

Figure 8. Removal steps of IO board, DC-in cable (continued)

RemovetheIOboardinthedirectionshownbyarrow4.

4

UnplugtheDC-incable connectorin thedirections shownby arrow5.Then

removetheDC-incableinthedirectionshownbyarrow6.

5

6

When installing:Makesurethattheconnectorisattachedrmly.

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U31-70 Hardware Maintenance Manual

1090

System board

Important notices for handling the system board:

When handling the system board, bear the following in mind.

• Be careful not to drop the system board on a bench top that has a hard surface,

such as metal, wood, or composite.

• Avoid rough handling of any kind.

• During the whole process, make sure not to drop or stack the system board.

• If you put a system board down, make sure to put it only on a padded surface such

as an ESD mat or conductive corrugated material.

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

• “1030PCIExpressMiniCardforwirelessLAN”onpage36

• “1050Speakers”onpage39

• “1060Harddiskdrive”onpage40

• “1070FanassemblyandHeatSinkassembly”onpage42

• “1080IOboard,DC-incable”onpage46

Figure 9. Removal steps of system board

Disconnectthe threeconnectors inthedirectionsshownbyarrows1,2

and3.Thenremovethescrews4and5.

4

5

5

5

1

2

3

2

3

Step Screw (quantity) Color Torque

4M2×4mm,Phillips-head,nylok-coated(1)

M/B---logup

Black 1.0~1.5kgf*cm

5M2×2.5mm,Phillips-head,nylok-coated(3)

M/B---logup

Silver 1.0~1.5kgf*cm

49

Lenovo U31-70

Figure 9. Removal steps of system board (continued)

Removethesystemboardinthedirectionshownbyarrow6.

6

Removethescrews7.

7

7

Step Screw (quantity) Color Torque

7M2×2.5mm,Phillips-head,nylok-coated(2)

RJ45cover---M/B

Silver 1.0~1.5kgf*cm

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U31-70 Hardware Maintenance Manual

Figure 9. Removal steps of system board (continued)

Remove the RJ-45 door in the direction shown by arrow 8.

8

Note:

• A new system board FRU is shipped with two absorbers. When you replace

the system board, you need to stick these absorbers on it.

• Fortheabsorberslocation,pleaserefertothefollowinggures:

Bottom side of system board

Top side of system board

Attention: The absorber may degrade the WLAN signal quality.

51

Lenovo U31-70

1100 Upper case

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

• “1030PCIExpressMiniCardforwirelessLAN”onpage36

• “1050Speakers”onpage39

• “1060Harddiskdrive”onpage40

• “1070FanassemblyandHeatSinkassembly”onpage42

• “1080IOboard,DC-incable”onpage46

• “1090Systemboard”onpage48

Figure 10. Removal steps of upper case

Removethescrews1.

1

1

1

1

Step Screw (quantity) Color Torque

1M2.5×5mm,Phillips-head,nylok-coated(4)

leftsidehinge---logup&rightsidehinge---logup

Black 1.5~2.0kgf*cm

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U31-70 Hardware Maintenance Manual

Figure 10. Removal steps of upper case (continued)

Openthehingeinthedirectionshownbyarrows2.

2

2

RemovetheuppercasefromtheLCDmoduleinthedirectionsshownby

arrow3.

3

53

Lenovo U31-70

Figure 10. Removal steps of upper case (continued)

Removethescrews4.Thenremovethetouchpadmodule5.

4444

5

Step Screw (quantity) Color Torque

4M2×2mm,Phillips-head,nylok-coated(4)

tpbracket---logup

Black 1.0~1.5kgf*cm

54

U31-70 Hardware Maintenance Manual

1110 LCD unit

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

• “1030PCIExpressMiniCardforwirelessLAN”onpage36

• “1050Speakers”onpage39

• “1060Harddiskdrive”onpage40

• “1070FanassemblyandHeatSinkassembly”onpage42

• “1080IOboard,DC-incable”onpage46

• “1090Systemboard”onpage48

• “1100Uppercase”onpage51

Figure 11. Removal steps of LCD unit

Removethescrewpads1,thenremovethescrews2.

2

1

2

1

Step Screw (quantity) Color Torque

2M2×3mm,Phillips-head,nylok-coated(2)

lcdbezel---lcdbrk---lcdcover

Silver 1.0~1.5kgf*cm

55

Lenovo U31-70

Figure 11. Removal steps of LCD unit (continued)

RemovetheLCDfrontbezelinthedirectionshownbyarrows3.

3

33

3

Removethescrews4.LifttheLCDmoduleslightly5.Disconnecttheconnectorin

thedirectionshownbyarrow6.ThenremovetheLCDmodule.

4

4

4

4

5

6

Step Screw (quantity) Color Torque

4M2×2.5mm,Phillips-head,nylok-coated(4)

lcdpanel---lcdcover

Silver 1.0~1.5kgf*cm

56

U31-70 Hardware Maintenance Manual

Figure 11. Removal steps of LCD unit (continued)

Detachthecameraconnectorinthedirectionshownbyarrow7.

7

RemovetheLCDcableinthedirectionshownbyarrows8.

8

8

When installing:Makesurethattheconnectorisattachedrmlyandthatyou

donotpinchtheantennacableswhenyouattachtheLCDassembly.Routethe

LCDcablealongthecableguides.

57

Lenovo U31-70

1120 Integrated camera, antenna assembly and LCD hinges

Foraccess,removetheseFRUsinorder:

• “1010Basecover”onpage32

• “1020Batterypack”onpage34

• “1030PCIExpressMiniCardforwirelessLAN”onpage36

• “1050Speakers”onpage39

• “1060Harddiskdrive”onpage40

• “1070FanassemblyandHeatSinkassembly”onpage42

• “1080IOboard,DC-incable”onpage46

• “1090Systemboard”onpage48

• “1100Uppercase”onpage51

• “1110LCDunit”onpage54

Figure 12. Removal steps of integrated camera, antenna assembly and

LCD hinges

Note:TheintegratedcameraisstuckonthetopcenteroftheLCDcover.

Removetheintegratedcamerainthedirectionshownbyarrow1.

1

When installing:SticktheintegratedcameratothetopcenteroftheLCD

coverandadjustitsplacementtomakesuretheconnectorisattachedrmly.

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U31-70 Hardware Maintenance Manual

Figure 12. Removal steps of integrated camera, antenna assembly and LCD

hinges (continued)

Peeloffthe adhesivetape securingthe antennaboards, releasethecables

fromthecableguide,andthenremovetheantennaassemblyinthedirection

shownbyarrows2.

2

2

Removethescrews3.

3

3

3

3

3

3

Step Screw (quantity) Color Torque

3M2×6mm,Phillips-head,nylok-coated(6)

lcdbrk---lcdcover

Black 1.0~1.5kgf*cm

59

Lenovo U31-70

Figure 12. Removal steps of integrated camera, antenna assembly and LCD

hinges (continued)

RemovetheLCDhingesinthedirectionshownbyarrows4.

4

4

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U31-70 Hardware Maintenance Manual

Locations

Front view and right-side view

1 Integratedcamera

2 Built-inmicrophone

3 Computerdisplay

4 WirelessLANantennas

5 Ventilationslots

6 Touchpad

7 Novobutton

8 USB3.0port

9 RJ-45port

J HDMIport

K Powerbutton

12

2

3

5

6

4

7

8

9

10

11

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Lenovo U31-70

Bottom and Left-side view

1 Speakers

2 System status indicators

Note: For the description of each indicator, see “Status indicators” on page 28.

3 Combo audio jack

4 Memory card slot

5 USB 2.0 port

6 AC power adapter jack

7 Kensington mini security slot

8 Louvers

1

1

3

2

4

5

6

7

8

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U31-70 Hardware Maintenance Manual

Parts list

Thissectionpresentsthefollowingserviceparts:

• “Overall”onpage63

• “LCDFRUs”onpage69

• “Miscellaneousparts”onpage71

• “ACadapters”onpage71

• “Screws”onpage71

• “Powercords”onpage72

Note:

Each FRU is available for all types or models, unless specic types or models are

specied.

Attention:

DonotattempttoreplaceanFRUonyourown.IfanFRUisdamaged,contact

aLenovoauthorizedserviceroramarketing representativeforreplacement

orrepair.Onlyqualiedtechnicianscaninspectorrepairthisproduct.

63

Lenovo U31-70

Overall

1

3

4

c

6

10

11

13

2

5

a

b

7

8

9

12

64

U31-70 Hardware Maintenance Manual

Table 4. Parts list—Overall

No. FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

a-c See“Miscellaneousparts”onpage71.

1 LCDunit(see“LCDFRUs”onpage69).

2 UpperCaseCU31-70BKLWhiteUS 5CB0J30905

N

● ●

2 UpperCaseCU31-70BKLWhiteGK 5CB0J30982 ● ●

2 UpperCaseCU31-70BKLWhiteINT'E 5CB0J30906 ● ●

2 UpperCaseCU31-70BKLWhiteKR 5CB0J30983 ● ●

2 UpperCaseCU31-70BKLWhiteCH 5CB0J30928 ● ●

2 UpperCaseCU31-70BKLWhiteRU 5CB0J31001 ● ●

2 UpperCaseCU31-70BKLWhiteAR 5CB0J30927 ● ●

2 UpperCaseCU31-70BKLWhiteHE 5CB0J31000 ● ●

2 UpperCaseCU31-70BKLWhiteTH 5CB0J30942 ● ●

2 UpperCaseCU31-70BKLWhiteINDIA 5CB0J30871 ● ●

2 UpperCaseCU31-70BKLWhiteUK 5CB0J30944 ● ●

2 UpperCaseCU31-70BKLWhiteIT 5CB0J30898 ● ●

2 UpperCaseCU31-70BKLWhiteSP 5CB0J30976 ● ●

2 UpperCaseCU31-70BKLWhiteTR 5CB0J30900 ● ●

2 UpperCaseCU31-70BKLWhitePO 5CB0J30975 ● ●

2 UpperCaseCU31-70BKLWhiteLA 5CB0J30899 ● ●

2 UpperCaseCU31-70BKLWhiteCF-E 5CB0J30978 ● ●

2 UpperCaseCU31-70BKLWhiteND 5CB0J30902 ● ●

2 UpperCaseCU31-70BKLWhiteFR 5CB0J30977 ● ●

2 UpperCaseCU31-70BKLWhiteGR 5CB0J30901 ● ●

2 UpperCaseCU31-70BKLWhiteBZ 5CB0J30979 ● ●

2 UpperCaseCU31-70BKLWhiteDUTCH 5CB0J30903 ● ●

2 UpperCaseCU31-70BKLWhiteHG 5CB0J30980 ● ●

2 UpperCaseCU31-70BKLWhiteBE 5CB0J30919 ● ●

2 UpperCaseCU31-70BKLWhiteICE 5CB0J30995 ● ●

2 UpperCaseCU31-70BKLWhiteSA 5CB0J30921 ● ●

2 UpperCaseCU31-70BKLWhiteSW 5CB0J30996 ● ●

2 UpperCaseCU31-70BKLWhiteBU 5CB0J30922 ● ●

2 UpperCaseCU31-70BKLWhiteCZ-SK 5CB0J30999 ● ●

2 UpperCaseCU31-70BKLWhiteUSA 5CB0J30971 ● ●

2 UpperCaseCU31-70BKLRedUS 5CB0J30893 ● ●

2 UpperCaseCU31-70BKLRedGK 5CB0J30967 ● ●

2 UpperCaseCU31-70BKLRedINT'E 5CB0J30892 ● ●

2 UpperCaseCU31-70BKLRedKR 5CB0J30968 ● ●

2 UpperCaseCU31-70BKLRedCH 5CB0J30889 ● ●

2 UpperCaseCU31-70BKLRedRU 5CB0J30969 ● ●

2 UpperCaseCU31-70BKLRedAR 5CB0J30890 ● ●

2 UpperCaseCU31-70BKLRedHE 5CB0J30964 ● ●

2 UpperCaseCU31-70BKLRedTH 5CB0J30883 ● ●

2 UpperCaseCU31-70BKLRedINDIA 5CB0J30974 ● ●

2 UpperCaseCU31-70BKLRedUK 5CB0J30896 ● ●

2 UpperCaseCU31-70BKLRedIT 5CB0J30972 ● ●

2 UpperCaseCU31-70BKLRedSP 5CB0J30894 ● ●

2 UpperCaseCU31-70BKLRedTR 5CB0J30973 ● ●

2 UpperCaseCU31-70BKLRedPO 5CB0J30895 ● ●

65

Lenovo U31-70

Table 4. Parts list—Overall (continued)

No. FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

2 UpperCaseCU31-70BKLRedLA 5CB0J30970

N

● ●

2 UpperCaseCU31-70BKLRedCF-E 5CB0J30891 ● ●

2 UpperCaseCU31-70BKLRedND 5CB0J30966 ● ●

2 UpperCaseCU31-70BKLRedFR 5CB0J30887 ● ●

2 UpperCaseCU31-70BKLRedGR 5CB0J30959 ● ●

2 UpperCaseCU31-70BKLRedBZ 5CB0J30882 ● ●

2 UpperCaseCU31-70BKLRedDUTCH 5CB0J30960 ● ●

2 UpperCaseCU31-70BKLRedHG 5CB0J30884 ● ●

2 UpperCaseCU31-70BKLRedBE 5CB0J30956 ● ●

2 UpperCaseCU31-70BKLRedICE 5CB0J30878 ● ●

2 UpperCaseCU31-70BKLRedSA 5CB0J30958 ● ●

2 UpperCaseCU31-70BKLRedSW 5CB0J30914 ● ●

2 UpperCaseCU31-70BKLRedBU 5CB0J30988 ● ●

2 UpperCaseCU31-70BKLRedCZ-SK 5CB0J30912 ● ●

2 UpperCaseCU31-70BKLRedUSA 5CB0J30989 ● ●

2 UpperCaseCU31-70NBKLWhiteUS 5CB0J30913 ● ●

2 UpperCaseCU31-70NBKLWhiteGK 5CB0J30990 ● ●

2 UpperCaseCU31-70NBKLWhiteINT'E 5CB0J30915 ● ●

2 UpperCaseCU31-70NBKLWhiteKR 5CB0J30991 ● ●

2 UpperCaseCU31-70NBKLWhiteCH 5CB0J30917 ● ●

2 UpperCaseCU31-70NBKLWhiteRU 5CB0J30992 ● ●

2 UpperCaseCU31-70NBKLWhiteAR 5CB0J30929 ● ●

2 UpperCaseCU31-70NBKLWhiteHE 5CB0J31002 ● ●

2 UpperCaseCU31-70NBKLWhiteTH 5CB0J30930 ● ●

2 UpperCaseCU31-70NBKLWhiteINDIA 5CB0J31004 ● ●

2 UpperCaseCU31-70NBKLWhiteUK 5CB0J30943 ● ●

2 UpperCaseCU31-70NBKLWhiteIT 5CB0J30946 ● ●

2 UpperCaseCU31-70NBKLWhiteSP 5CB0J30872 ● ●

2 UpperCaseCU31-70NBKLWhiteTR 5CB0J30945 ● ●

2 UpperCaseCU31-70NBKLWhitePO 5CB0J30873 ● ●

2 UpperCaseCU31-70NBKLWhiteLA 5CB0J30947 ● ●

2 UpperCaseCU31-70NBKLWhiteCF-E 5CB0J30874 ● ●

2 UpperCaseCU31-70NBKLWhiteND 5CB0J30948 ● ●

2 UpperCaseCU31-70NBKLWhiteFR 5CB0J30876 ● ●

2 UpperCaseCU31-70NBKLWhiteGR 5CB0J30949 ● ●

2 UpperCaseCU31-70NBKLWhiteBZ 5CB0J30875 ● ●

2 UpperCaseCU31-70NBKLWhiteDUTCH 5CB0J30950 ● ●

2 UpperCaseCU31-70NBKLWhiteHG 5CB0J30877 ● ●

2 UpperCaseCU31-70NBKLWhiteBE 5CB0J30952 ● ●

2 UpperCaseCU31-70NBKLWhiteICE 5CB0J30880 ● ●

2 UpperCaseCU31-70NBKLWhiteSA 5CB0J30954 ● ●

2 UpperCaseCU31-70NBKLWhiteSW 5CB0J30879 ● ●

2 UpperCaseCU31-70NBKLWhiteBU 5CB0J30953 ● ●

2 UpperCaseCU31-70NBKLWhiteCZ-SK 5CB0J30881 ● ●

2 UpperCaseCU31-70NBKLRedUS 5CB0J30957 ● ●

2 UpperCaseCU31-70NBKLRedGK 5CB0J30886 ● ●

2 UpperCaseCU31-70NBKLRedINT'E 5CB0J30962 ● ●

66

U31-70 Hardware Maintenance Manual

Table 4. Parts list—Overall (continued)

No. FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

2 UpperCaseCU31-70NBKLRedKR 5CB0J30885

N

● ●

2 UpperCaseCU31-70NBKLRedCH 5CB0J30961 ● ●

2 UpperCaseCU31-70NBKLRedRU 5CB0J30888 ● ●

2 UpperCaseCU31-70NBKLRedAR 5CB0J30965 ● ●

2 UpperCaseCU31-70NBKLRedHE 5CB0J30926 ● ●

2 UpperCaseCU31-70NBKLRedTH 5CB0J31010 ● ●

2 UpperCaseCU31-70NBKLRedINDIA 5CB0J30937 ● ●

2 UpperCaseCU31-70NBKLRedUK 5CB0J31009 ● ●

2 UpperCaseCU31-70NBKLRedIT 5CB0J30936 ● ●

2 UpperCaseCU31-70NBKLRedSP 5CB0J31008 ● ●

2 UpperCaseCU31-70NBKLRedTR 5CB0J30935 ● ●

2 UpperCaseCU31-70NBKLRedPO 5CB0J31007 ● ●

2 UpperCaseCU31-70NBKLRedLA 5CB0J30934 ● ●

2 UpperCaseCU31-70NBKLRedCF-E 5CB0J31006 ● ●

2 UpperCaseCU31-70NBKLRedND 5CB0J30933 ● ●

2 UpperCaseCU31-70NBKLRedFR 5CB0J31005 ● ●

2 UpperCaseCU31-70NBKLRedGR 5CB0J30932 ● ●

2 UpperCaseCU31-70NBKLRedBZ 5CB0J30866 ● ●

2 UpperCaseCU31-70NBKLRedDUTCH 5CB0J30939 ● ●

2 UpperCaseCU31-70NBKLRedHG 5CB0J30865 ● ●

2 UpperCaseCU31-70NBKLRedBE 5CB0J30938 ● ●

2 UpperCaseCU31-70NBKLRedICE 5CB0J30869 ● ●

2 UpperCaseCU31-70NBKLRedSA 5CB0J30941 ● ●

2 UpperCaseCU31-70NBKLRedSW 5CB0J30868 ● ●

2 UpperCaseCU31-70NBKLRedBU 5CB0J30940 ● ●

2 UpperCaseCU31-70NBKLRedCZ-SK 5CB0J30870 ● ●

3 Touchpad,synaTM-02334-00169x104x10.5I2C+ 73042414 ● ●

3 Touchpad,ElanSA469D-22H169x104x10.5I2C+ 73048465 ● ●

3 Touchpad,KGDFF0118A69x04x1.00.5PS 5T60G97154 ● ●

4 IOBoardCU31-70W/Cable 5C50J30997 ● ●

5 MBCU31-70NOK50052GNBKL 5B20J30908 ●

5 MBCU31-70WIN50052GNBKL 5B20J30981 ●

5 MBCU31-70NOKI7-5500DISBKL 5B20J33176 ●

5 MBCU31-70WINI7-5500DISBKL 5B20J33167 ●

5 MBCU31-70NOKI5-5200DISBKL 5B20J33187 ●

5 MBCU31-70WINI5-5200DISBKL 5B20J33182 ●

5 MBCU31-70NOKI5-5200DISNBKL 5B20J33179 ●

5 MBCU31-70WINI5-5200DISNBKL 5B20J33173 ●

5 MBCU31-70NOKI5-5200UMABKL 5B20J33169 ●

5 MBCU31-70WINI5-5200UMABKL 5B20J33163 ●

5 MBCU31-70NOKI5-5200UMANBKL 5B20J33184 ●

5 MBCU31-70WINI5-5200UMANBKL 5B20J33180 ●

5 MBCU31-70NOKI3-5010DISBKL 5B20J33175 ●

5 MBCU31-70WINI3-5010DISBKL 5B20J33171 ●

5 MBCU31-70NOKI3-5010DISNBKL 5B20J33166 ●

5 MBCU31-70WINI3-5010DISNBKL 5B20J33174 ●

5 MBCU31-70NOKI3-5010UMABKL 5B20J33170 ●

67

Lenovo U31-70

No. FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

5 MBCU31-70WINI3-5010UMABKL 5B20J33164

N

●

5 MBCU31-70NOKI3-5010UMANBKL 5B20J33186 ●

5 MBCU31-70WINI3-5010UMANBKL 5B20J33181 ●

5 MBCU31-70NOKI3-5005DISBKL 5B20J33177 ●

5 MBCU31-70WINI3-5005DISBKL 5B20J33172 ●

5 MBCU31-70NOK5005UMABKLNGC 5B20J33168 ●

5 MBCU31-70WIN5005UMABKLNGC 5B20J33162 ●

5 MBCU31-70NOKI3-5005UMANBKL 5B20J33183 ●

5 MBCU31-70WINI3-5005UMANBKL 5B20J33165 ●

5 MBCU31-70NOK3805UMANNGC 5B20J33185 ●

5 MBCU31-70WIN3805UMANNGC 5B20J33178 ●

5 MBCU31-70NOK40052GBKL 5B20J30925 ●

5 MBCU31-70WIN40052GBKL 5B20J30994 ●

5 MBCU31-704030NOK2GBKL 5B20J33425 ●

5 MBCU31-704030WIN2GBKL 5B20J33424 ●

5 MBCU31-70I3-4030NOKDISNBKL 5B20J33416 ●

5 MBCU31-70I3-4030WINDISNBKL 5B20J33422 ●

5 MBCU31-70I3-4030NOKUMABKL 5B20J33413 ●

5 MBCU31-70I3-4030WINUMABKL 5B20J33419 ●

5 MBCU31-70I3-4030NOKUMANBKL 5B20J33423 ●

5 MBCU31-70I3-4030WINUMANBKL 5B20J33415 ●

5 MBCU31-70I3-4005NOKDISNBKL 5B20J33420 ●

5 MBCU31-70I3-4005WINDISNBKL 5B20J33426 ●

5 MBCU31-704005NOKBKLNGC 5B20J33417 ●

5 MBCU31-704005WINBKLNGC 5B20J33421 ●

5 MBCU31-70I3-4005NOKUMANBKL 5B20J33414 ●

5 MBCU31-70I3-4005WINUMANBKL 5B20J33418 ●

6FanCU31-70 5F10J31003 ● ●

7HeatsinkCU31-70DIS 5H40J30993 ● ●

7HeatsinkCU31-70UMA 5H40J30910 ● ●

8 WLAN,Intel31601x1AC+BTPCIEM.2ROMWLAN SW10A11511 ● ●

8 WLAN,CbtBCM431621x1AC+BT4.0PCIEM.2WLANV2 SW10A11586 ● ●

8 WLAN,LtnNFA3451x1AC+BT4.0PCIEM.2WLANV2 SW10A11628 ● ●

8 WLAN,CbtRTL8821AE1x1AC+BT4.0PCIEM.2WLAN SW10A11648 ● ●

9 SpeakerCU31-70 5SB0J30923 ● ●

10 RAM,M471B5173EB0-YK04GBDDR3L1600 5M30G18425 ● ●

10 RAM,HMT451S6BFR8A-PB/RD4GBDDR3L1600 11202706 ● ●

10 RAM,RMT3170MN68F9F-16004GBDDR3L1600 5M30G75129 ● ●

10 RAM,M471B1G73EB0-YK08GBDDR3L1600 5M30G18424 ● ●

10 RAM,HMT41GS6BFR8A-PB/RD8GBDDR3L1600 11202707 ● ●

10 RAM,RMT3160ME68FAF-16008GBDDR3L1600 11202450 ● ●

11 Battery,U31SP/AL14M2P247.6V35Wh2cell 5B10H13092 ● ●

11 Battery,U31SP/CL14M2P247.6V35Wh2cell 5B10H13096 ● ●

11 Battery,U31SYL14S2P227.6V35Wh2cell 5B10H17229 ● ●

11 Battery,U31LGL14L2P227.6V35Wh2cell 5B10H17230 ● ●

12 Harddiskdrive,ST500LT0126G7mm5.4K500GHDD 16200383 ● ●

Table 4. Parts list—Overall (continued)

68

U31-70 Hardware Maintenance Manual

Table 4. Parts list—Overall (continued)

No. FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

12 Harddiskdrive,WD5000LPCX-24C6HT06G7mm5.4K

500GHDD 16200395

N

● ●

12 Harddiskdrive,MQ01ABF0506G7mm5.4K500GHDD 16200433 ● ●

12 Harddiskdrive,ST500LM0006G7mm500G+8GSSHD 16200391 ● ●

12 Harddiskdrive,ST500LM0007mm500G+8G(forSIT) 5H20H24608 ● ●

12 Harddiskdrive,WDMN500Mh-2(6G)7mm1TB+(H)8G

5400rpm 16200681 ● ●

13 LowerCaseCU31-70White 5CB0J30951 ● ●

13 LowerCaseCU31-70Red 5CB0J30909 ● ●

— ACadapter(see“ACadapters”onpage71).

69

Lenovo U31-70

LCD FRUs

InLenovoU31-70,thereisfollowingtypeofLCD.

• “13.3-in.HDLED”

1

2

3

4

5

6

7

70

U31-70 Hardware Maintenance Manual

Table 5. Parts list—LCD FRUs

No. FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

1 LCDBezelCU31-70Black 5B30J30986

N

● ●

1 LCDBezelCU31-70White 5B30J30920 ● ●

2 Panel,AUOB133XTN01.60AHDAGSNB 5D10H11004 ● ●

2 Panel,IVOM133NWN1R4HDAGSNB 5D10H33278 ● ●

2 Panel,BOEHB133WX1-402HDAGSLED1NBLCD 18201050 ● ●

2 Panel,LGDLP133WF2-SPL1FHDAGSNB 5D10H11579 ● ●

2 Panel,SDCLTN133HL05-401FHDAGSNB 5D10H30488 ● ●

3 EDPCableCU31-70 5C10J30955 ● ●

4 AntennaCU31-70 5A30J30911 ● ●

5 CameraCU31-70 5C20J30907 ● ●

6HingeCU31-70 5H50J30904 ● ●

7LCDCoverCU31-70White 5CB0J30867 ● ●

7LCDCoverCU31-70Red 5CB0J30984 ● ●

71

Lenovo U31-70

Miscellaneous parts

Table 6. Parts list—Miscellaneous parts

FRU FRU no. CRU

ID.

U31-70

BDW

U31-70

HSW

Systemmiscellaneousparts:

N

• (

a

)RJ45DoorCU31-70White 5D30J30998 ● ●

• (

a

)RJ45DoorCU31-70Red 5D30J30924 ● ●

• (

b

)HDDBracketCU31-70 5B40J30985 ● ●

Cablemiscellaneousparts:

• (

c

)DC-INCableCU31-70 5C10J30918 ● ●

Note:Italicized lettersinparenthesesarereferences tothe

explodedviewin“Overall”onpage63.

AC adapters

Table 7. Parts list—3-pin AC adapters

FRU P/N CRU

ID.

U31-70

BDW

U31-70

HSW

ChiconyADLX45NCC3A20V2.25Aadap(CMN) 36200610

*

● ●

LiteonADLX45NLC3A20V2.25Aadap(CMN) 36200606 ● ●

DeltaADLX45NDC3A20V2.25Aadap(CMN) 36200602 ● ●

ChiconyADLX65NCC3A20V3.25Aadapter(CMN) 36200611 ● ●

LiteonADLX65NLC3A20V3.25Aadapter(CMN) 36200607 ● ●

DeltaADLX65NDC3A20V3.25Aadapter 36200249 ● ●

Screws

Table 8. Parts list—screws

FRU P/N CRU

ID.

U31-70

BDW

U31-70

HSW

ScrewPackCU31-70 5S10J30931 N ● ●

72

U31-70 Hardware Maintenance Manual

Power cords

ALenovopowercordforaspeciccountryorregionisusuallyavailableonlyinthatcountryorregion:

Table 9. Parts list—power cords

Region P/N CRU

ID.

U31-70

BDW

U31-70

HSW

UK3PIN

• lux0031+H03VV-F0.75/3C+00111m 145500000

*● ●

Europe3PIN

• lux0033+H03VV-F0.75/3C+00111m 145500001

US3PINlux

• 0014+SPT-260°C18/3C+00161m 145500002

China3PIN

• lux0036+RVV300/3000.75/3C+00021m 145500003

Indian3PIN

• lux0046+IS6940.75/3C+00111m 145500004

Japan3PIN

• lux0018(E)+VCTF0.75/3C+00211m 145500005

Australia3PIN

• lux0038+H03VV-F0.75/3C+00111m 145500006

Taiwan3PIN

• lux0019+VCTF0.75/3C+00211m 145500007

Korea3PIN

• lux0033+H03VV-F0.75/3C+00111m 145500008

Italy3PIN

• lux0029+H03VV-F0.75/3C+00111m 145500009

SouthAfrica3PIN

• lux0044+H03VV-F0.75/3C+00111m 145500010

Brazil3PIN

• lux0034+H03VV-F0.75/3C+00111m 145500011

Israel3PIN

• lux0041+H03VV-F0.75/3C+00111m 145500012

Switzerland3PIN

• lux0027+H03VV-F0.75/3C+00111m 145500013

Denmark3PIN

• lux0048+H03VV-F0.75/3C+00111m 145500014

Argentina3PIN

• lux0040+H03VV-F0.75/3C+00111m 145500015

CCC3PIN

• LongwellLSG-31+RVV300/300+LS-181m 145000568

Argentina3PIN

• LongwellLP-24+H03VV-F+LS-181m 145000567

Danmark3PIN

• LongwellLP-40+H03VV-F+LS-181m 145000566

Switzerland3PIN

• LongwellLP-37+H03VV-F+LS-181m 145000565

Brazil3PIN

• LongwellLP-46+H03VV-F+LS-181m 145000564

73

Lenovo U31-70

Region P/N CRU

ID.

U31-70

BDW

U31-70

HSW

Israel3PIN

• LongwellLP-41+H03VV-F+LS-181m 145000563

*● ●

UL3PIN

• LongwellLP-30B+SPT-218AWG+LS-181m 145000562

UK3PIN

• LongwellLP-61L+H03VV-F+LS-181m 145000561

Indian3PIN

• LongwellLP-67+BIS+LS-181m 145000560

Italy3PIN

• LongwellLP-22+H03VV-F+LS-181m 145000559

Korea3PIN

• LongwellLP-486+KTLH03VV-F+LS-51m 145000558

Australia3PIN

• LongwellLP-23A+LFC-3R+LS-181m 145000557

Taiwan3PIN

• LongwellLP-71+VCTF+LS-331m 145000556

Japan3PIN

• LongwellLP-54+VCTF+LS-181m 145000555

Africa3PIN

• LongwellLP-39+H03VV-F+LS-181m 145000554

CE3PIN

• LongwellLP-34A+H03VV-F+LS-181m 145000553

CCC3PIN

• VOLEXGB10S3+RVV300/500+VAC5S1m 145000538

UL3PIN

• VolexUS15S3+SPT-2+VAC5S1m 145000537

UK3PIN

• VOLEXMP5004+H03VV-F+VAC5S1m 145000605

Switzerland3PIN

• VOLEXMP232+H03VV-F+VAC5S1m 145000524

Italy3PIN

• VOLEXIT10S3+HO3VV-F+VAC5S1m 145000535

Denmark3PIN

• VOLEXMP233D+H03VV-F+VAC5S1m 145000534

Korea3PIN

• VOLEXM2511+KETIIEC+VAC5S1m 145000533

Australia3PIN

• VOLEXAU10S3+H03VV-F+VAC5S1m 145000532

Taiwan3PIN

• VOLEXTW15CS3+VCTF+VAC5S1m 145000531

Japan3PIN

• VOLEXVAC5S+VCTF+M7551m 145000530

Argentina3PIN

• VOLEXVA2073+H03VV-F+VAC5S1m 145000528

Table 9. Parts list—power cords (continued)

74

U31-70 Hardware Maintenance Manual

Region P/N CRU

ID.

U31-70

BDW

U31-70

HSW

Brazil3PIN

• VOLEXCH10S3+H03VV-F+VAC5S1m 145000527

*● ●

Israel3PIN

• VOLEXSI16S3+H03VV-F+VAC5S1m 145000526

CE3PIN

• VOLEXM2511+HO3VV-F+VAC5S1m 145000525

CCC3PIN

• LINETEKPC323+RVV300/300+LS151m 145000600

Argentina3PIN

• LINETEKLS15+H03VV-F+LP391m 145000599

Danmark3PIN

• LINETEKLS15+H03VV-F+LP-381m 145000598

Switzerland3PIN

• LINETEKLS15+H03VV-F+LP-371m 145000597

Brazil3PIN

• LINETEKLS15H03VV-FLP26A1m 145000596

Israel3PIN

• LINETEKLS15+H03VV-F+LP-411m 145000595

UL3PIN

• LINETEKLP-30B+SPT-2+LS151m 145000594

UK3PIN

• LINETEKLP-61L+H03VV-F+LS151m 145000593

Indian3PIN

• LINETEKPE-361+H05VV-F+LS151m 145000592

Italy3PIN

• LINETEKLS15+H03VV-F+PE-3361m 145000591

Korea3PIN

• LINETEKLS15+H05VV-F+LP-E04A1m 145000590

Australia3PIN

• LINETEKLS15+H03VV-F+LP-23A1m 145000589

Taiwan3PIN

• LINETEKLS15+VCTF+LP-531m 145000588

Japan3PIN

• LINETEKLS15+VCTF+LP-541m 145000587

Africa3PIN

• LINETEKLS15+H03VV-F+PE-3641m 145000586

CE3PIN

• LINETEKLP-34+H03VV-F+LS151m 145000585

Table 9. Parts list—power cords (continued)

75

Notices

Notices

Lenovomaynotoffertheproducts,services,orfeaturesdiscussedinthis

documentinallcountries.ConsultyourlocalLenovorepresentativefor

informationontheproducts andservices currentlyavailableinyourarea.Any

referencetoaLenovoproduct,program,orserviceisnot intendedtostateor

implythatonlythatLenovoproduct,program,orservicemaybeused.Any

functionallyequivalent product,program, orservicethatdoesnotinfringe

anyLenovo intellectualpropertyrightmaybeusedinstead. However, itisthe

user’sresponsibilitytoevaluateandverifytheoperationofanyotherproduct,

program,orservice.

Lenovomayhavepatentsorpendingpatentapplicationscoveringsubjectmatter

describedinthisdocument.The furnishingofthisdocumentdoesnotgiveyou

anylicensetothesepatents.

LENOVOGROUPLTD.PROVIDESTHISPUBLICATION“ASIS”

WITHOUTWARRANTY OFANYKIND,EITHEREXPRESSORIMPLIED,

INCLUDING,BUTNOTLIMITEDTO,THEIMPLIEDWARRANTIESOFNON-

INFRINGEMENT,MERCHANTABILITYORFITNESSFORAPARTICULAR

PURPOSE.Somejurisdictionsdonotallowdisclaimerofexpressorimplied

warrantiesincertaintransactions,therefore,thisstatementmaynotapplytoyou.

Thisinformation couldinclude technicalinaccuraciesor typographicalerrors.

Changesareperiodicallymade tothe informationherein; thesechanges

willbeincorporatedin neweditions ofthe publication.Lenovomaymake

improvementsand/or changesin theproduct(s)and/ortheprogram(s)

describedinthispublicationatanytimewithoutnotice.

Theproductsdescribedin thisdocument arenotintendedforusein

implantationorotherlifesupportapplicationswheremalfunctionmay resultin

injuryordeathtopersons.Theinformationcontainedinthisdocumentdoesnot

affectorchange Lenovoproduct specicationsor warranties.Nothinginthis

documentshalloperateasanexpressorimpliedlicenseorindemnityunderthe

intellectualpropertyrightsofLenovoorthird parties.Allinformationcontained

inthisdocumentwasobtainedinspecicenvironmentsandispresentedasan

illustration.Theresultobtainedinotheroperatingenvironmentsmayvary.

Lenovomayuseordistributeanyoftheinformationyousupplyinanywayit

believesappropriatewithoutincurringanyobligationtoyou.

Anyreferencesinthispublicationtonon-LenovoWebsitesareprovidedfor

convenienceonlyanddonotinanymannerserveasanendorsementofthose

Websites.Thematerials atthoseWebsitesarenotpartofthematerials for

thisLenovoproduct,anduseofthoseWebsitesisatyourownrisk.

76

U31-70 Hardware Maintenance Manual

Anyperformance datacontainedherein wasdetermined inacontrolled

environment.Therefore,theresultobtainedin otheroperating environments

mayvarysignificantly.Some measurementsmayhavebeenmadeon

development-levelsystemsandthereisnoguaranteethatthesemeasurements

willbethesameongenerallyavailablesystems.Furthermore,some

measurementsmayhavebeenestimatedthroughextrapolation.Actualresults

mayvary.Usersofthisdocumentshouldverify theapplicable datafor their

specicenvironment.

Trademarks

ThefollowingtermsaretrademarksorregisteredtrademarksofLenovointhe

UnitedStates,othercountries,orboth.

Lenovo

OneKey

MicrosoftandWindowsaretrademarksofMicrosoftCorporationin theUnited

States,othercountries,orboth.

Othercompany,products,or servicenames maybetrademarksorservice

marksofothers.