Apple iPhone 4S A1431 Spécifications

 Apple Technician GuideiPhone 4 iPhone 4 and iPhone 4SADN 070-2840-CUpdated: 2012-02-21

iPhone 4 — Updates 10 2012-02-21• Changed “Internal Liquid Contact Indicators” text to “If the LCI is activated (red), it indicates contact with liq

iPhone 4 (GSM model) Take Apart — Main Camera 100 2012-02-21First Steps• Back CoverNote: A replacement camera kit (661-5692 black, or 661-5693 white

iPhone 4 (GSM model) Take Apart — Main Camera 101 2012-02-21Removal1 Remove (5) cross-head screws from camera cowling using iPhone Torque Driver and

iPhone 4 (GSM model) Take Apart — Main Camera 102 2012-02-213 Grasp camera cowling with tweezers as shown and gently pull towards battery to free ho

iPhone 4 (GSM model) Take Apart — Main Camera 103 2012-02-21Reassembly1 Using ESD-safe tweezers, apply 3 pieces of foam (included in camera kit) onto

iPhone 4 (GSM model) Take Apart — Main Camera 104 2012-02-214 Make sure grounding clip is installed at the top center of camera cowling. The clip s

iPhone 4 (GSM model) Take Apart — Main Camera 105 2012-02-216 Install (5) new cross-head screws using iPhone Torque Driver and JCIS #00 Bit. Each

iPhone 4 (GSM model) Take Apart — Vibe Motor 106 2012-02-21First Steps• Back CoverNote: A replacement vibe motor kit includes new screws.Important:

iPhone 4 (GSM model) Take Apart — Vibe Motor 107 2012-02-21Removal1 Remove (2) cross-head screws from vibe motor using iPhone Torque Driver and JCIS

iPhone 4 (GSM model) Take Apart — Vibe Motor 108 2012-02-21Reassembly1 Position vibe motor in iPhone.2 Install (2) new cross-head screws in the orde

iPhone 4 (GSM model) Take Apart — Battery 109 2012-02-21First Steps• Back CoverWARNING: If battery is dented, punctured or otherwise damaged, STOP!

iPhone 4 — Feedback 11 2012-02-21FeedbackWe want your feedback to help improve this and future Technician Guides! Please email any comments to: sm

iPhone 4 (GSM model) Take Apart — Battery 110 2012-02-21Removal1 Remove (1) cross-head screw from battery connector using iPhone Torque Driver and JC

iPhone 4 (GSM model) Take Apart — Battery 111 2012-02-215 Secure unit in iPhone 4 Battery Fixture tray. 6 Holding tray down with one hand, pull bat

iPhone 4 (GSM model) Take Apart — Battery 112 2012-02-217 Remove old adhesive from mid-plate. Caution: Be careful of ex cables and other component

iPhone 4 (GSM model) Take Apart — Battery 113 2012-02-213 Position new adhesive so the holes align with landmarks on mid-plate. Note: Using a piece

iPhone 4 (GSM model) Take Apart — Battery 114 2012-02-216 Press battery connector down onto logic board.7 Position battery against main board.8 Ca

iPhone 4 (GSM model) Take Apart — Battery 115 2012-02-2110 Put tray into iPhone 4 Battery Fixture, aligning white marks on tray with front edge of ve

iPhone 4 (GSM model) Take Apart — Battery 116 2012-02-2112 Slide tray through vertical tower. This will cause the roller to press the battery down

iPhone 4 (GSM model) Take Apart — Battery 117 2012-02-2113 Slide tray back through vertical tower to original position. Important: Only slide the tr

iPhone 4 (GSM model) Take Apart — Battery 118 2012-02-2116 Make sure coax cable connector is securely attached to logic board, then install new batte

© 2011 Apple Inc. All rights reserved. Apple Technician GuideTake Apart – iPhone 4 (CDMA model)

© 2011 Apple Inc. All rights reserved. Apple Technician GuideBasicsiPhone 4

iPhone 4 (CDMA model) Take Apart — Internal View 120 2012-02-21Internal ViewInternal view of the iPhone 4 (CDMA model), Model A1349:

iPhone 4 (CDMA model) Take Apart — Service Parts 121 2012-02-21Service PartsService Parts for iPhone 4 (CDMA model)Description Part Number Kit Conten

iPhone 4 (CDMA model) Take Apart — Service Parts 122 2012-02-21Back Cover IdenticationThe back cover of iPhone 4 includes glass that is very similar

iPhone 4 (CDMA model) Take Apart — Back Cover 123 2012-02-21First Steps• Refer to the Visual Mechanical Inspection guidelines to determine any acci

iPhone 4 (CDMA model) Take Apart — Back Cover 124 2012-02-21Removal1 Remove (2) dock screws on bottom of phone using iPhone Torque Driver and iPhone

iPhone 4 (CDMA model) Take Apart — Back Cover 125 2012-02-21Reassembly1 If installing a new replacement back cover, remove 2 pieces of clear protecti

iPhone 4 (CDMA model) Take Apart — Back Cover 126 2012-02-213 Slide back cover down and into the locked position.4 Insert (2) new dock screws (452-

iPhone 4 (CDMA model) Take Apart — Internal Checks 127 2012-02-21Internal ChecksInternal Liquid Contact IndicatorThe iPhone 4 (CDMA model) contains o

iPhone 4 (CDMA model) Take Apart — Internal Checks 128 2012-02-21Serial Number BarcodeWith the back cover removed, the serial number is printed in bo

iPhone 4 (CDMA model) Take Apart — Main Camera 129 2012-02-21First Steps• Back CoverNote: A replacement camera kit includes a new camera cowling and

iPhone Basics — Overview 13 2012-02-21OverviewScope of this DocumentThis Apple Technician Guide provides troubleshooting steps, take apart procedures

iPhone 4 (CDMA model) Take Apart — Main Camera 130 2012-02-21Removal1 Remove (5) cross-head screws from camera cowling using iPhone Torque Driver and

iPhone 4 (CDMA model) Take Apart — Main Camera 131 2012-02-213 Grasp camera cowling with tweezers as shown and gently pull towards battery to free h

iPhone 4 (CDMA model) Take Apart — Main Camera 132 2012-02-217 Remove and save the small black rubber camera pan from rear of camera. This part will

iPhone 4 (CDMA model) Take Apart — Main Camera 133 2012-02-212 Place camera into iPhone, sliding tab under ex cable. Important: Be sure camera pan

iPhone 4 (CDMA model) Take Apart — Main Camera 134 2012-02-214 Place camera cowling into position as shown, using tweezers to hook underneath logic

iPhone 4 (CDMA model) Take Apart — Battery 135 2012-02-21First Steps• Back CoverWARNING: If battery is dented, punctured or otherwise damaged, STOP!

iPhone 4 (CDMA model) Take Apart — Battery 136 2012-02-21Removal1 Remove (1) cross-head screw from battery connector using iPhone Torque Driver and J

iPhone 4 (CDMA model) Take Apart — Battery 137 2012-02-213 Secure unit in iPhone 4 Battery Fixture tray. 4 Holding tray down with one hand, pull ba

iPhone 4 (CDMA model) Take Apart — Battery 138 2012-02-215 Remove old adhesive from mid-plate. Caution: Be careful of ex cables and other componen

iPhone 4 (CDMA model) Take Apart — Battery 139 2012-02-213 Position new adhesive so it aligns with landmarks on mid-plate. Note: Using a piece of t

iPhone Basics — Overview 14 2012-02-21System RequirementsMac• Mac computer with USB 2.0 port• Mac OS X v10.5.8 or later• The latest version of iTu

iPhone 4 (CDMA model) Take Apart — Battery 140 2012-02-216 Press battery connector down onto logic board.7 Position battery against main board.8 C

iPhone 4 (CDMA model) Take Apart — Battery 141 2012-02-2110 Put tray into iPhone 4 Battery Fixture, aligning white marks on tray with front edge of v

iPhone 4 (CDMA model) Take Apart — Battery 142 2012-02-2112 Slide tray through vertical tower. This will cause the roller to press the battery down

iPhone 4 (CDMA model) Take Apart — Battery 143 2012-02-2113 Slide tray back through vertical tower to original position. Important: Only slide the t

iPhone 4 (CDMA model) Take Apart — Battery 144 2012-02-2116 Press battery connector down onto logic board.17 Install (1) new cross-head screw (452-20

© 2011 Apple Inc. All rights reserved. Apple Technician GuideTake Apart – iPhone 4S

iPhone 4S Take Apart — Internal View 146 2012-02-21Internal ViewInternal view of the iPhone 4S, Models A1387 and A1431 (China only):

iPhone 4S Take Apart — Service Parts 147 2012-02-21Service PartsService Parts for iPhone 4SDescription Part Number Kit ContentsSIM Tray 922-9602 (1)

iPhone 4S Take Apart — Service Parts 148 2012-02-21Back Cover Service PartsBlack iPhone 4S 923-0049 Americas, EMEA, Japan, Australia, APAC BZ923-

iPhone 4S Take Apart — SIM Tray 149 2012-02-21First Steps• Power o iPhoneRemoval1 Insert the end of a SIM Removal Tool (922-8417) or a small thin

iPhone Basics — Identifying iPhones 15 2012-02-21Identifying iPhonesModel DierencesiPhone models can be identied by model number, which is printed

iPhone 4S Take Apart — Back Cover 150 2012-02-21First Steps• Refer to the Visual Mechanical Inspection guidelines to determine any accidental damag

iPhone 4S Take Apart — Back Cover 151 2012-02-21Removal1 Remove (2) dock screws on bottom of phone using iPhone Torque Driver and iPhone Torx Securit

iPhone 4S Take Apart — Back Cover 152 2012-02-21Reassembly1 If installing a new replacement back cover, remove 2 pieces of clear protective lm cover

iPhone 4S Take Apart — Back Cover 153 2012-02-213 Slide back cover down and into the locked position.4 Insert (2) new dock screws (923-0053) on bot

iPhone 4S Take Apart — Internal Checks 154 2012-02-21Internal ChecksInternal Liquid Contact IndicatorThe iPhone 4S contains one internal liquid conta

iPhone 4S Take Apart — Internal Checks 155 2012-02-21Serial Number BarcodeWith the back cover removed, the serial number is printed in both human-rea

iPhone 4S Take Apart — Volume Button Shim 156 2012-02-21First Steps• Back CoverFor iPhone 4S volume buttons issues, follow this procedure to install

iPhone 4S Take Apart — Volume Button Shim 157 2012-02-21Procedure1 There are 3 screw pins that hold Flex to band around volume buttons. A Spring pro

iPhone 4S Take Apart — Volume Button Shim 158 2012-02-213 Grasp shim (923-0072) with tweezers.4 Angle shim towards battery slightly and lower into

iPhone 4S Take Apart — Main Camera 159 2012-02-21First Steps• Back CoverNote: A replacement camera kit includes a new camera pan and new screws.Impo

iPhone Basics — Identifying iPhones 16 2012-02-21Serial Number and IMEI/MEID LocationiPhones that use GSM technology have an IMEI, or International M

iPhone 4S Take Apart — Main Camera 160 2012-02-21Removal1 Remove (4) cross-head screws from camera cowling using iPhone Torque Driver and JCIS #00 Bi

iPhone 4S Take Apart — Main Camera 161 2012-02-213 Grasp camera cowling with tweezers as shown and gently pull towards battery to free hook from und

iPhone 4S Take Apart — Main Camera 162 2012-02-217 Ensure that you have removed the small black rubber camera pan along with the camera. Pan may ha

iPhone 4S Take Apart — Main Camera 163 2012-02-212 Place camera into iPhone. Important: Be sure camera pan stays correctly oriented on bottom of ca

iPhone 4S Take Apart — Main Camera 164 2012-02-216 Install (4) new cross-head screws using iPhone Torque Driver and JCIS #00 Bit:• Screw #1, 923-00

iPhone 4S Take Apart — Battery 165 2012-02-21First Steps• Back CoverWARNING: If battery is dented, punctured or otherwise damaged, STOP! Reinstall b

iPhone 4S Take Apart — Battery 166 2012-02-21Removal1 Remove (2) cross-head screw from battery connector using iPhone Torque Driver and JCIS #00 Bit.

iPhone 4S Take Apart — Battery 167 2012-02-214 Secure unit in iPhone 4 Battery Fixture tray. 5 Holding tray down with one hand, pull battery remova

iPhone 4S Take Apart — Battery 168 2012-02-216 Remove old adhesive from mid-plate. Caution: Be careful of ex cables and other components while rem

iPhone 4S Take Apart — Battery 169 2012-02-213 Position new adhesive so it aligns with landmarks on mid-plate. Note: Using a piece of tape folded i

iPhone Basics — Identifying iPhones 17 2012-02-213. If iPhone is displaying the “Connect to iTunes” screen, tap the ‘i” in a circle at the lower rig

iPhone 4S Take Apart — Battery 170 2012-02-216 Press battery connector down onto logic board.7 Position battery against main board.8 Carefully lay

iPhone 4S Take Apart — Battery 171 2012-02-2110 Put tray into iPhone 4 Battery Fixture, aligning white marks on tray with front edge of vertical towe

iPhone 4S Take Apart — Battery 172 2012-02-2112 Slide tray through vertical tower. This will cause the roller to press the battery down onto the ad

iPhone 4S Take Apart — Battery 173 2012-02-2113 Slide tray back through vertical tower to original position. Important: Only slide the tray back to

iPhone 4S Take Apart — Battery 174 2012-02-2116 Press battery connector down onto logic board.17 Place battery cowling underneath battery connector a

© 2011 Apple Inc. All rights reserved. Apple Technician GuideVerication TestingiPhone 4

iPhone 4 Verication Testing — Completing a Repair 176 2012-02-21Completing a RepairTest FunctionalityTest the device according to the procedures out

iPhone 4 Verication Testing — Carrier Screening 177 2012-02-21Carrier ScreeningThis section provides comprehensive instructions to carriers for test

iPhone 4 Verication Testing — Carrier Screening 178 2012-02-21Computer Setup for Restoration ProcessThis should be a blank install and not contain p

iPhone 4 Verication Testing — Carrier Screening 179 2012-02-21Cosmetic ProtectionPrior to the start of testing a generic Mylar cling wrap should be

iPhone Basics — Identifying iPhones 18 2012-02-21Conguration CodesAll iPhone models have a unique conguration code (the last 3-4 characters of the

iPhone 4 Verication Testing — Carrier Screening 180 2012-02-21Insert Test SIM (GSM networks only)1. Remove the SIM tray from iPhone.2. Place the T

iPhone 4 Verication Testing — Carrier Screening 181 2012-02-21Test Radio Frequency (GSM networks)There are two ways to test radio frequency (R/F) fu

iPhone 4 Verication Testing — Functional Testing 182 2012-02-21Functional TestingThis section may be used by all channels to verify functionality of

iPhone 4 Verication Testing — Functional Testing 183 2012-02-21Test Buttons and Switches1. From the Home screen, open any app, then press the Home

iPhone 4 Verication Testing — Functional Testing 184 2012-02-21Test Wi-Fi1. Go to Settings > Wi-Fi and connect to a known-good Wi-Fi network.2.

iPhone 4 Verication Testing — Functional Testing 185 2012-02-21Test GPSiPhone uses signals from GPS satellites, Wi-Fi hot spots, and cellular towers

iPhone 4 Verication Testing — Functional Testing 186 2012-02-21Test Audio Playback1. Launch the Music (or iPod) app, choose and play a song. Adjust

iPhone 4 Verication Testing — Functional Testing 187 2012-02-21Test Video Playback1. Launch the Videos app (iOS 5) or iPod app (iOS 4).2. Select a

iPhone 4 Verication Testing — Functional Testing 188 2012-02-213. Change the focus area and set exposure: A rectangle on the screen shows the area

iPhone 4 Verication Testing — Functional Testing 189 2012-02-21

iPhone Basics — Apple ID 19 2012-02-21Apple IDMany iOS 5 features require an Apple ID, including:• Home Sharing• iCloud• iMessage• iTunes and App

 Apple Inc.© 2011-2012 Apple Inc. All rights reserved.Under the copyright laws, this document may not be copied, in whole or in part, without the wri

iPhone Basics — Additional Resources 20 2012-02-21Additional ResourcesiPhone Product PageiPhone features and technology. www.apple.com/iphone/ iPhone

© 2011 Apple Inc. All rights reserved. Apple Technician GuideTroubleshootingiPhone 4

iPhone 4 Troubleshooting — Cleaning Procedures 22 2012-02-21Cleaning ProceduresRequired Tools• Lighted otoscope (or lighted magnifying glass)• ESD-

iPhone 4 Troubleshooting — Cleaning Procedures 23 2012-02-21Headphone JackForeign material in the headphone jack can cause audio or functional issues

iPhone 4 Troubleshooting — Cleaning Procedures 24 2012-02-21Receiver1. Inspect the receiver for loose debris.2. Use an anti-static brush to gently

iPhone 4 Troubleshooting — General Troubleshooting 25 2012-02-21General TroubleshootingBackup User DataBefore troubleshooting a user’s device, verify

iPhone 4 Troubleshooting — General Troubleshooting 26 2012-02-21Common Troubleshooting ProceduresWhen troubleshooting, attempt the quick xes in the

iPhone 4 Troubleshooting — General Troubleshooting 27 2012-02-21Charge BatteryThe device must have a sucient battery charge to proceed with troubles

iPhone 4 Troubleshooting — General Troubleshooting 28 2012-02-21RestartA restart safely closes active apps and processes, preserving any data in the

iPhone 4 Troubleshooting — General Troubleshooting 29 2012-02-21Force Quit an AppThis procedure forces an app to quit that is not responding to input

iPhone 4 ContentsAbout This GuideUpdates 9Updated 21 February 2012 9Updated 16 November 2011 9Introduced 14 October 2011 10Note About Images In Th

iPhone 4 Troubleshooting — General Troubleshooting 30 2012-02-21Erase All Content and SettingsErase is a quick way to get back to factory settings. I

iPhone 4 Troubleshooting — General Troubleshooting 31 2012-02-21RestoreA restore completely erases the device and reinstalls a fresh copy of iOS.WARN

iPhone 4 Troubleshooting — General Troubleshooting 32 2012-02-21Procedure:Use the following steps to place a device into recovery mode. If the device

iPhone 4 Troubleshooting — General Troubleshooting 33 2012-02-21DFU RestoreDevice Firmware Update (DFU) Restore allows you to perform a restore when

iPhone 4 Symptom Charts — Power Issues 34 2012-02-21Symptom ChartsPower IssuesNo PowerKnown-Good Parts & Materials Required: USB Power Adapter, D

iPhone 4 Symptom Charts — Power Issues 35 2012-02-214. Verify device status.Identify if device woke up to the “battery trap” image (at left) or to a

iPhone 4 Symptom Charts — Power Issues 36 2012-02-21Battery Will Not ChargeKnown-Good Parts & Materials Required: USB Power Adapter, Dock Connect

iPhone 4 Symptom Charts — Power Issues 37 2012-02-213. Verify charge status.Check battery icon in the upper right-hand corner of the screen.Is the d

iPhone 4 Symptom Charts — Power Issues 38 2012-02-21Battery Life Too ShortKnown-Good Parts & Materials Required: USB Power Adapter, Dock Connecto

iPhone 4 Symptom Charts — Power Issues 39 2012-02-214. Diagnose unresponsive apps.Use diagnostics to determine any apps that are unresponsive runnin

Symptom Charts 34Power Issues 34No Power 34Battery Will Not Charge 36Battery Life Too Short 38Other Power Issue 39Display Issues 40No Video / P

iPhone 4 Symptom Charts — Display Issues 40 2012-02-21Display IssuesNo Video / Poor ImageKnown-Good Parts & Materials Required: Dock Connector to

iPhone 4 Symptom Charts — Display Issues 41 2012-02-21Display AnomaliesKnown-Good Parts & Materials Required: noneQuick CheckSymptoms Quick Check

iPhone 4 Symptom Charts — Display Issues 42 2012-02-21Multi-Touch IssuesKnown-Good Parts & Materials Required: noneQuick CheckSymptoms Quick Chec

iPhone 4 Symptom Charts — Display Issues 43 2012-02-21Display Rotation IssuesKnown-Good Parts & Materials Required: Dock Connector to USB Cable,

iPhone 4 Symptom Charts — Display Issues 44 2012-02-21Cracked GlassKnown-Good Parts & Materials Required: noneQuick CheckSymptoms Quick Check• C

iPhone 4 Symptom Charts — Display Issues 45 2012-02-21Other Display IssueDeep DiveCheck Result Action1. Verify whether any of the troubleshooting o

iPhone 4 Symptom Charts — Mechanical Issues 46 2012-02-21Mechanical IssuesButton IssuesKnown-Good Parts & Materials Required: Dock Connector to U

iPhone 4 Symptom Charts — Mechanical Issues 47 2012-02-212. Check software response.For volume up/down buttons, test volume up and down. For on/o b

iPhone 4 Symptom Charts — Mechanical Issues 48 2012-02-21Camera IssuesKnown-Good Parts & Materials Required: Dock Connector to USB Cable, compute

iPhone 4 Symptom Charts — Mechanical Issues 49 2012-02-213. Clean glass over camera lens.If main camera is aected, remove back cover and clean both

Take ApartGeneral Information 85Before You Begin 85Electrostatic Discharge Precautions 85Required Tools 85Safety 86Battery Handling 86Broken Gla

iPhone 4 Symptom Charts — Mechanical Issues 50 2012-02-21Temperature AlertKnown-Good Parts & Materials Required: Dock Connector to USB Cable, com

iPhone 4 Symptom Charts — Mechanical Issues 51 2012-02-213. Restore with iTunes.Restore the device using the latest version of iTunes. If restore fa

iPhone 4 Symptom Charts — Mechanical Issues 52 2012-02-21Band Split/OsetDeep DiveCheck Result Action1. Check for safety issue.Determine whether the

iPhone 4 Symptom Charts — Software Issues 53 2012-02-21Software IssuesUnexpected Freeze/Restart/Power O, “Connect to iTunes”Known-Good Parts & M

iPhone 4 Symptom Charts — Software Issues 54 2012-02-213. Identify iOS screen.Identify if the device woke to “slide to unlock” rather than the Apple

iPhone 4 Symptom Charts — Software Issues 55 2012-02-21Alert Messages on Device or in iTunesKnown-Good Parts & Materials Required: Dock Connector

iPhone 4 Symptom Charts — Software Issues 56 2012-02-21App IssuesKnown-Good Parts & Materials Required: Dock Connector to USB Cable, iOS diagnost

iPhone 4 Symptom Charts — Software Issues 57 2012-02-214. Restore with iTunes.Restore the device using the latest version of iTunes. If restore fail

iPhone 4 Symptom Charts — Software Issues 58 2012-02-212. Erase all content and settings.Go to Settings > General > Reset > Erase All Conte

iPhone 4 Symptom Charts — Connectivity Issues 59 2012-02-21Connectivity IssuesiTunes Sync IssuesKnown-Good Parts & Materials Required: USB Power

Take Apart – iPhone 4 (CDMA model)Internal View 120Service Parts 121Back Cover Identication 122Back Cover 123Removal 124Reassembly 125Internal

iPhone 4 Symptom Charts — Connectivity Issues 60 2012-02-212. Verify device presence in iTunes.Connect the device to user’s computer (if available)

iPhone 4 Symptom Charts — Connectivity Issues 61 2012-02-217. Recovery mode restore.Restore the device in recovery mode using the latest version of

iPhone 4 Symptom Charts — Connectivity Issues 62 2012-02-21Deep DiveCheck Result Action1. Forget the current network.Go to Settings > Wi-Fi and t

iPhone 4 Symptom Charts — Connectivity Issues 63 2012-02-21Bluetooth IssuesKnown-Good Parts & Materials Required: Bluetooth accessory, Dock Conne

iPhone 4 Symptom Charts — Connectivity Issues 64 2012-02-213. Test known-good Bluetooth accessory.Attempt to pair device with a known-good Bluetooth

iPhone 4 Symptom Charts — Connectivity Issues 65 2012-02-21Deep DiveCheck Result Action1. Identify carrier type.Identify whether the carrier uses CD

iPhone 4 Symptom Charts — Connectivity Issues 66 2012-02-217. Restore with iTunes.Restore the device using the latest version of iTunes. If restore

iPhone 4 Symptom Charts — Connectivity Issues 67 2012-02-21Deep DiveCheck Result Action1. Identify carrier type.Identify whether the carrier uses CD

iPhone 4 Symptom Charts — Connectivity Issues 68 2012-02-217. Reset network settings.Go to Settings > General > Reset > Reset Network Setti

iPhone 4 Symptom Charts — Connectivity Issues 69 2012-02-21Deep DiveCheck Result Action1. Inspect SIM card and tray.Using the SIM removal tool, ejec

Verication TestingCompleting a Repair 176Test Functionality 176Verify Cellular Account 176Clean Device 176Handle Defective Parts 176Carrier Scre

iPhone 4 Symptom Charts — Sound Issues 70 2012-02-21Sound IssuesNo Ringer SoundKnown-Good Parts & Materials Required: Dock Connector to USB Cable

iPhone 4 Symptom Charts — Sound Issues 71 2012-02-213. Restore with iTunes.Restore the device using the latest version of iTunes. If restore fails,

iPhone 4 Symptom Charts — Sound Issues 72 2012-02-212. Restore with iTunes.Restore the device using the latest version of iTunes. If restore fails,

iPhone 4 Symptom Charts — Sound Issues 73 2012-02-21Deep DiveCheck Result Action1. Clean the device.Check that speaker or receiver mesh are not obst

iPhone 4 Symptom Charts — Sound Issues 74 2012-02-21Microphone IssuesKnown-Good Parts & Materials Required: Dock Connector to USB Cable, computer

iPhone 4 Symptom Charts — Sound Issues 75 2012-02-213. Erase all content and settings.Go to Settings > General > Reset > Erase All Content

iPhone 4 Symptom Charts — Sound Issues 76 2012-02-21Headphone IssuesKnown-Good Parts & Materials Required: Apple Earphones, Dock Connector to USB

iPhone 4 Symptom Charts — Sound Issues 77 2012-02-213. Test with known-good headphones.Substitute known-good Apple Earphones. Play known-good media

iPhone 4 Symptom Charts — Sound Issues 78 2012-02-21Headphone Microphone IssuesKnown-Good Parts & Materials Required: Apple Earphones with Remote

iPhone 4 Symptom Charts — Sound Issues 79 2012-02-213. Test with known-good headphones.Substitute known-good Apple Earphones with Remote and Mic. Op

© 2011 Apple Inc. All rights reserved. Apple Technician GuideAbout This GuideiPhone 4

iPhone 4 Symptom Charts — Sound Issues 80 2012-02-21Other Sound IssueDeep DiveCheck Result Action1. Verify whether any of the troubleshooting ows a

iPhone 4 Symptom Charts — Accessories Issues 81 2012-02-21Accessories Issues“Accessory not made to work”Known-Good Parts & Materials Required: iP

iPhone 4 Symptom Charts — Accessories Issues 82 2012-02-21TV/Video Out IssuesKnown-Good Parts & Materials Required: Display and compatible cables

iPhone 4 Symptom Charts — Accessories Issues 83 2012-02-21Other Accessories IssueDeep DiveCheck Result Action1. Verify whether any of the troublesho

© 2011 Apple Inc. All rights reserved. Apple Technician GuideTake ApartiPhone 4

iPhone 4 Take Apart — General Information 85 2012-02-21General InformationBefore You Begin• IMPORTANT: Refer to the Visual Mechanical Inspection gui

iPhone 4 Take Apart — Safety 86 2012-02-21SafetyBattery HandlingiPhone 4 includes a lithium-polymer rechargeable battery. Avoid exposure to heat and

iPhone 4 Take Apart — Safety 87 2012-02-21First Aid MeasuresUnder normal conditions the battery is hermetically sealed.Inhalation Contents of an open

© 2011 Apple Inc. All rights reserved. Apple Technician GuideTake Apart – iPhone 4 (GSM model)

iPhone 4 (GSM model) Take Apart — Internal View 89 2012-02-21Internal ViewInternal view of the iPhone 4 (GSM model), Model A1332:

iPhone 4 — Updates 9 2012-02-21UpdatesUpdated 21 February 2012Cover Page: Changed document number to version 070-2840-C.Troubleshooting:• Removed Vi

iPhone 4 (GSM model) Take Apart — Service Parts 90 2012-02-21Service PartsService Parts for iPhone 4 (GSM model)Description Part Number Kit ContentsS

iPhone 4 (GSM model) Take Apart — Service Parts 91 2012-02-21Back Cover IdenticationThe back cover of iPhone 4 includes glass that is very similar t

iPhone 4 (GSM model) Take Apart — Service Parts 92 2012-02-21The following tables will help you identify the correct back cover for the model being r

iPhone 4 (GSM model) Take Apart — SIM Tray 93 2012-02-21First Steps• Power o iPhoneRemoval1 Insert the end of a SIM Removal Tool (922-8417) or a s

iPhone 4 (GSM model) Take Apart — Back Cover 94 2012-02-21First Steps• Refer to the Visual Mechanical Inspection guidelines to determine any accide

iPhone 4 (GSM model) Take Apart — Back Cover 95 2012-02-21Removal1 Remove (2) dock screws on bottom of phone using iPhone Torque Driver and iPhone To

iPhone 4 (GSM model) Take Apart — Back Cover 96 2012-02-21Reassembly1 If installing a new replacement back cover, remove 2 pieces of clear protective

iPhone 4 (GSM model) Take Apart — Back Cover 97 2012-02-213 Slide back cover down and into the locked position.4 Insert (2) new dock screws on bott

iPhone 4 (GSM model) Take Apart — Internal Checks 98 2012-02-21Internal ChecksInternal Liquid Contact IndicatorsThe iPhone 4 (GSM model) contains two

iPhone 4 (GSM model) Take Apart — Internal Checks 99 2012-02-21Serial Number BarcodeWith the back cover removed, the serial number is printed in barc