iPad mini拆解.docx
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- 上传时间:2023-05-26
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iPad mini拆解.docx
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iPadmini拆解
Step1—iPadMiniTeardown
∙WhatdoyougetwhenyoucramaniPadintoasmallerandlighterframe?
o7.9"1024x768pixel(163ppi)multi-touchdisplay
oDual-coreA5processor
o5megapixelrear-facingand1.2megapixelfront-facingcameras
oBluetooth4.0
oLightningconnector
o16,32,or64GBcapacity
Step2
∙Comparisontime!
WiththeintroductionoftheMini,ApplenowoffersiDevicesfitforanybudget.Let'stakealookathowtheystackup.
∙Frombottomtotop:
∙iPad(3rdGeneration)
∙iPadMini
∙SlightlysmalleriPadMini—akaiPodTouch
∙
TheiPadMinihasnotone,buttwospeakergrillestopumpoutminibeats.Don'tlettheiPhone5'sdualgrillesfoolyou;theMiniisthefirsthandheldiDevicetohousestereospeakers.
Step3
∙
FewthingsgetusmoreexcitedthanfindinganewmodelnumberonanAppledevice.ThoughthenewmodelnumberisonlytwoofffromthelastiPadwetoredown,wequiteliterallycouldnotbemorethrilled.
∙ModelNumber:
A1432.Funfact:
theyear1432wasaleapyear!
∙Apple'skerningonouriPad'sserialnumberseemsalittlequestionable.Didtheyhavetosqueezeinanextradigitatthelastminute?
Step4
∙No,it'snotaniPadHalloweencostume;it'stheiOpener!
∙TheiOpenerisournewiPadopeningtoolthatsoftenspeskyadhesive,allowingyoutogetinsidewithouthavingtoresorttoourotheriPadopeningtool.
∙ThankstoourtrustyiOpener,amicrowave,andhalfanhour'sworthoftime,theadhesiveiswarmedtotheperfecttemperatureforustofreetheglass/digitizerassemblytothespookytuneofouriFixitguitarpicks.
∙
TheiPadMinicontinuesApple'srepair-impedingpracticeofkeepingiPadstogetherwithcopiousamountsofadhesive.Thisisoneareainwhichthefriendly-to-openNexus7andKindleFireHDareclearwinners.
Step5
∙
ThetouchscreenstillfunctionswiththeglassseparatedfromtheLCD.
∙Wewerepleasantlysurprisedthatthisroundofglassremovalwaseasierthanpreviousones,requiringlesspatienceandanear-zerofear-factor.
∙Withtheglassremoved,wearereadytogetatthegutsofthispint-sizediPad(orgallon-sizediPod,dependingonhowyoulookatit.)
Step6
∙SofaritlookslikeApplehasmoretricksthantreatsforuswithahiddenscrewsecuringthedisplay.
∙Afterdispatchingtwohiddenscrewsandtwoexposedscrewswithour54BitDriverKit,weareabletolifttheLCD.
∙Pullingupthedisplayrevealsalargemetalplate,heldinwithnofewerthan16screws.
∙WefoundsimilarplatesintheiPodTouch5thGeneration,andtheiPhone5,sothisseemstobeanewiDevicedesignconvention.
Step7
∙Timetoremovesomemetal.Withtheinnerframeandtheconnectorcovers,thereisenoughmetalheretoforgeatleasttwo—maybethree—paperclips.
∙AllthispryinganddisconnectingisremindingusalotofourrecentiPodTouchteardown.Butremember,theMiniandtheTouchare,infact,differentdevices.
Step8
∙OurfirstexposedICisonewe'veseenbefore,intheiPhone5.
∙Infact,youmightsaywe'vegotaprettycloserelationshipwiththeMurata339S0171Wi-Fimodule.
∙Moretricks,fewertreats!
Withplasticopeningtoolinhand,wedisconnectthedisplayconnector,butthere'sstillsomethingholdingtheLCDin…
Step9
∙…andtheculpritisfound.InsulatingtapeholdsthedisplaytotherearcaseandprotectstheLightningconnectorcable.
∙Withthetapepeeledup,weremovethedisplayassemblyandcanturnourattentiontotheinterior.
∙
Badnews:
duetotheplacementofconnectors,you'llneedtoremovetheLCDpriortoremovingthedigitizer.Greatnews:
theLCDandfrontglassaretwoseparatecomponents.Thiscontraststhefusedglass-LCDassembliesinboththeKindleFireHDandNexus7.Thanksfortherepairability,Apple!
Step10
∙PeelingthetapeandEMIshieldoffthedisplayrevealstheICscontrollingthe1024x768unit:
∙SamsungW1235S6TNMR1X01DisplayDriver
∙SM4031DA1232SMCP043
∙416R8227
∙HDU2YC34
∙
ThoughthemarkingsonthebackoftheLCDdon'tturnupmuchinformation,theSamsungdisplaydriverICrevealsthatAppleonceagainwentwithSamsunginitsdisplaymanufacturing.
∙
ApplehasreportedlybeenworkingtomoveawayfromSamsungasaprimarysupplier,soit'ssomewhatsurprisingtoseeaSamsungLCDinside.Withthatsaid,Appleoftenreliesonmultiplesuppliersforasinglecomponent,meaningthere'squitelikelyotherLCDmanufacturerslurkinginsideotheriPadMinis.
Step11
∙Fortunately,theiPadMiniinheritedtheconnector-fastenedbatteryfromitslargersibling,notthesoldered-inbatteryfoundintheiPodTouch.
∙
Aplasticcardmakesanicetooltoprythebatteryupfromtherearpanel,butit'sstillaverydifficulttasktobreakthroughalloftheadhesivesecuringittotherearcasewithoutpuncturingthecells.
∙Aclose-upofthebatteryconnectorexposesthenumbers821-1564-04C3312.
EditStep12 ¶
∙Wegetagoodlookatthebattery,andfindourselvesscratchingourheadsabit.
∙Thisisa3.72V,16.5Whr,4440mAhbattery.
∙Ormaybeit'sa3.78V,16.9Whr,4400mAhbattery?
∙Ormaybeit'sa3.72V,4400mAhbattery?
∙Ormaybe,accordingtoApple'stechspecs,it'sonly16.3Whr.
∙Whateverthecapacity,it'sdecidedlyminiwhencomparedtothemassive43WhrbatteryintheiPad3.EventhevenerableiPad2sportsa25Whrpackage,50%morethantheiPadMini.
Step13 ¶
∙Nextoffisthedigitizer.
∙HidingontheconnectorareacoupleofBroadcomtouchcontrollerICsmarkedBCM5976C0KUB6G.
∙Thischiplooksfamiliar…ohyeah,wesawthemintheMacBookAir.
Step14
∙Anantennasitsontopofeachspeaker,presumablyWi-FiandBluetooth.
∙Applewasn'tjokingabout"mini";thesearesomeofthesmallestscrewswehaveeverseen!
∙
Forcomparison,thescrewontherightisfromthebottomofaniPhone5,wherethescrewontheleftisfromtheMini.
Step15
∙ThefolksatAmazondoubted,butwecanconfirmtheMinidoesindeedsportstereospeakers.Inthisoneregard,theMinioutdoesthestill-monoRetinaiPad.
∙Thereductionofconnectorsize(30-pintoLightning)hasleftjustenoughspacetosqueezeasecondspeakerintothedevice,allowingforsoundqualitythatisanythingbutmini.
∙
∙
Step16 ¶
∙TwohiddenscrewssecuretheLightningconnectortotherearcase.
∙They'vebeenaroundlessthantwomonths,butLightningportsarespreadinglikewildfireacrossnearlytheentireiOSlineup.However,theiPad2,iPhone4/4S,andiPodShufflearestillLightning-less…fornow.
∙AsbadlyaswewanttocompletelyremovetheLightningportribboncable,wewillhavetowait,asitappearstobesolderedtothelogicboard.
Step17 ¶
∙We'regettingreadytoexaminethebrainsofthisdevice,butnotbeforeclearingouttherestofthesurroundingperipherals.
∙Severalscrewssecurethepower/volumebuttonsribboncableassemblytotherearcase.
tep18
∙Theendlessbattlewithadhesiveragesonasweheatthebacksideoftherearcaseinhopesoflooseningtheadhesivesecuringthelogicboardtotherearcase.
∙Applyingheattoanaluminumframelikethismakesittoohottotouch—luckilywekeepasiliconepotholderonhandjustforthissortofthing.
∙Oncetheadhesiveisloose,wearmourselveswithaspudgertodislodgethelogicboardfromtherearcase.
Step19
∙
Nothingtoseehere.
∙UnliketheiPad3'sdockconnector,theMini'slightningportispermanentlysolderedtothelogicboard.Thatdesigndecisionwillmakecertainrepairsveryexpensive.
Step20
∙TheA5processorhas512MBRAM,justliketheprocessorinthelatestiPodTouch.
∙Howdoweknow?
ThepackagemarkingsE4064P3PM-8D-5indicatetheA5hastwo2Gb,LPDDR2RAMdiesinside,accordingtoChipworks.
∙ThesediephotosfromChipworksshowstheinnerworkingsoftheA5.Caretoseethedieinallitsgoryglory?
Checkoutthehigh-resversion.
∙Step21
∙ThetopsideofthelogicboardhousesalloftheICs:
∙HynixH2JTDG8UD2MBR16GBNANDFlash
∙Apple343S0593-A5
∙Apple338S1116CirrusLogicAudioCodec
∙FairchildPCHPSFDMC6676BZ
∙FairchildBC7BEF0MC6683
∙Apple338S1077,akaCirrusLogicClassDAmplifier(thanksChipworks!
)
Step22 ¶
∙Strongadhesivecontinuestoslowouradvance,soanotherhitwiththeheatgunisprescribedtoprytheheadphonejackandfrontfacingcameraassemblyoutoftherearcase.
∙
TheiPadMinidoeswellinthecameradepartment.WhilemosthardwarespecscloselymatchtheagingiPad2,itscamerasmatchthosefoundinthetheRetinaiPad.Itsfront-facingFaceTimeHDcameradelivers1.2MPphotos,andtherear-facingiSightcameradelivers5MPresolutionandHDvideo.
Step23
∙iPadMiniRepairability:
2outof10(10iseasiesttorepair).
∙TheLCDandglassarenotfusedtogetherandcanbereplacedindependently.
∙Thebatteryisnotsolderedtothelogicboardorothercomponents.
∙Teeny-tinyscrewscanbeeasilymisplacedifyou'renotcareful.Don'tsneezetoohardwhiletakingthemoff.
∙Copiousamountsofadhesiveholdmanycomponentsinplace--frontglass,logicboard,battery,frontcamera,backcamera,ribboncables--makingrepairextremelydifficult.
∙TheLightningconnectorissolderedtothelogicboard,sodon'tbenditspins.
∙Hiddenscrewsmeanyou'llneedtobeverydiligentwhentryingtoremoveinternalcomponents.
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