2. Overview iPhone is created by two parts: AP and RF The structure of AP The AP part is divided into three main units a. Power Unit » There are two functions Address: 1114 February 3th Street, Ward 12, District 11, HCMC 2 Phone: 1900.5555.34 Website: www.chamsocdidong.com o Supply voltages for the system of AP. This Block is composed of three components: Battery, power IC, IC Supply Voltage to support for Power IC, called Sub Power IC) o Recharge voltage for battery : Charging IC (from iPhone 3Gs or higher, Charging IC is integrated in Power IC) b. Processing Unit » 2layers IC (CPU of AP part): Controls the all operation of iPhone (AP and RF). This is IC stores SHSH of iPhone » Rom o This is IC stores Serial Number (from iPhone 4 or higher, Rom is integrated in Hard Drive Disk) » Hard Drive Disk (HDD) o This is IC shows capacity of iPhone (such as: 4GB, 16GB, 32GB…) o Read the Hard Drive Disk’s capacity SanDisk16 32 64 128 Toshiba7 8 9 0 HyannisD E F G c. External Interface Unit » Most of peripheral devices of iPhone is connected to the Board through the Socket. In which, the Proximitysocket, Headphonesocket and Chargersocket are the Sockets contain many devices and frequently cause strangePans on the iPhone. » It can be said, whenever the iPhone has the strange ways: Display the offlinemode, safemode, hanging, auto reset.. These 3Sockets are the first cause must be test.
A INTRODUCTON Block Diagram Overview - iPhone is created by two parts: AP and RF The structure of AP The AP part is divided into three main units a Power Unit » There are two functions Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com o Supply voltages for the system of AP This Block is composed of three components: Battery, power IC, IC Supply Voltage to support for Power IC, called Sub Power IC) o Recharge voltage for battery : Charging IC (from iPhone 3Gs or higher, Charging IC is integrated in Power IC) b Processing Unit » 2-layers IC (CPU of AP part): Controls the all operation of iPhone (AP and RF) This is IC stores SHSH of iPhone » Rom o This is IC stores Serial Number (from iPhone or higher, Rom is integrated in Hard Drive Disk) » Hard Drive Disk (HDD) o This is IC shows capacity of iPhone (such as: 4GB, 16GB, 32GB…) Read the Hard Drive Disk’s capacity SanDisk 16 32 64 128 Toshiba Hyannis D E F G c External Interface Unit o » Most of peripheral devices of iPhone is connected to the Board through the Socket In which, the Proximity-socket, Headphone-socket and Charger-socket are the Sockets contain many devices and frequently cause strange-Pans on the iPhone » It can be said, whenever the iPhone has the strange ways: Display the offline-mode, safe-mode, hanging, auto reset These 3-Sockets are the first cause must be test Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com The structure of RF RF can be called the 4th block of the mobile phone (basic wave block) However, in the iPhone, the RF is a complex structure, it manages the basic wave block, Wi-Fi/BT and Global Positioning System-GPS From Iphone4s or higher, the Wi-Fi/BT managed by the AP part To operate the RF part , the iPhone is designed to have more the processing unit and the Power unit The RF part is controlled by 2layers IC via CPU of RF a Power Unit » Supply voltages for the system of RF It includes Battery, power IC, Sub Power IC » It Affects to the charging process of iPhone b Processing Unit » CPU controls the Baseband and stores IMEI » Flash stores Baseband and IMEI o iPhone 4s, iPhone 5/ 5s: Flash is replaced by Rom o iPhone 6/ Plus: Processing Unit of RF part only has CPU c RF Unit » Basic wave Block (2G - 3G - 4G), includes: o Ant, Sw-Ant, Saw, Coupler o IF Ic , PA, Cobba (CPU, Audio) o Carrier and 13Mhz Oscillation » Wi-Fi/BT » Global Positioning System – GPS Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com Essential components on iPhone (3Gs) - The AP Power unit a Supply voltages for AP » Battery Connector: J7_RF - BATTERY_CON » Power Ic : U18_AP » Sub Power IC: U26_AP, U20_AP… b Recharge voltage for Battery » Q4, Q5, U18_AP (Charging IC is intergrated in Power IC) Processing unit a 2-layers IC: U2_AP b Memory: Stores and exports data » Hard Drive Disk: U1_AP » ROM: U12_AP Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com External Interface unit a Headphones_Socket: J1_AP » Mute Button (used to on/off the Silent mode): RINGER_A » Power Button: PWR_KEY’ » Volume Button: VOL_UP/ VOL_DOWN » Headphones: HP_DETECT b Charger_Socket: J3_AP » Home Button: MENU_KEY’ » Speaker out (Ring): SPKR_CONN » Microphone: Mic » Charger: USB _PWR_NO_PROTECT c Proximity/ Ear_ Socket: J7_AP » Ear (Speaker in):RCVR » Proximity: ALS/ OPTICAL d Screen Socket: J4_AP ( LCD/DISPLAY) » LED driver IC (Light IC) : Q3_AP » Sub Power Ic for LCD: U20_AP e Touchscreen_Socket : J5_AP (PANEL/ TOUCHSCREEN) » Touchscreen Ic : U22_AP » Sub power IC for touchscreen : U26_AP f Camera Socket: J6_AP g Compass Ic: U4_AP, U5_AP - COMPASS h Rotation Sensor Ic : U13_AP - ACCELEROMETER i Audio IC: U15_AP (Manages: speaker, ear, mic, HP…) j Motor: MTR1 - MOTOR/ VIBE k Gyrocope: GYRO l Ambient Light sensor/ proximity: ALS/ Optical m Signal controls the light (LED_LCD): SW_BOOT/ WLED1_OUT Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com - The RF Power unit a Supply voltages for RF » Battery Connector: J7_RF » Power Ic: U25_RF » Sub Power IC : U2_RF, U23_RF… Processing unit a CPU: U22_RF » CPU manages SIM - SIM Connector: J2_AP b FLASH: U1_RF RF unit a Basic wave Block: 2G, 3G » Ant Connector : J4_RF (Receives and transmits 2G, 3G) » SW-Ant: U4_RF - 2G, 3G (select bandwidth) » Saw receive 3G: U3_RF (Filter) Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com » Saw transmit 3G: U410_RF (Filter) » Mid-Frequency: U16_RF » PA 2G: U14_RF - 900 (BAND8/ LO_BAND); 1800 (HB_BAND) » PA 3G: U5_RF - 850 (BAND 5/ TX_3G_LB and transmit GPRS/EDGE) » PA 3G: U37_RF - 1900 (BAND 2/ TX_3G_MB) » PA 3G: U19_RF - 2100 (BAND 1/ TX_3G_HB) b Wi-Fi/ BT: U6_RF (WLAN) c Global Positioning System: U31_RF (GPS) Notes - Block diagram of Pwr_key’ and Charging curcuit - IC Audio Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com - Block diagram of Base Wave Unit (iPhone 4) COUPLER ANT 1800 GSM_1800_in SAW HB_band_Tx LO_band_Tx band2_RF 1800 1900 900 2100 U37 PA U19 PA U20 PA U5 PA band2_RX band1_RF GPRS band1_RX band8_RF 900 band8_RX EDGE band5_RF 0850 band5_RX CDMA U1 GPRS EDGE PA U6 U7 TX_3G_MB_IN TX_3G_HB_IN TX_3G_LB_IN U8 U21 U8 - Block diagram of Wi-Fi/BT and GPS (iPhone 4) BATT_VCC L18_RF WLAN_FEM_ANT J11_RF FL12_RF WL_BT_VDDIO SP2_RF SP1_RF U33_RF FL1_RF L20_RF GPS_CHIP_MATH U2_RF WL_BT_VDDIO VRF1_GPS G3_RF OSC U14_RF Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com B COLLECT THE ERRORS WHEN RESTORE IPHONE BY ITUNES April -2015 Version (iOS 7.xx - 8.xx) Require the connection between the computer and iPhone is really good Usually iPhone can be cable or apple or sticked-on DFU mode Sequencing restore iPhone by iTunes: …… …………….…………… 2…………… Step 1: Begin to write software (write AP part) Step 2: Write AP part for iPhone has finshed Step 3: Write RF part for iPhone has finshed Explain the Errors when restore iPhone by iTunes: The stage before step 1, iTunes reports - Error: 2003 or 2005 → cause: can be the cable runs program - Error: 4004 or 4005 → cause: can be the computer - Error: 3004 → cause: can be the internet - Error: 3194 → cause: can be the last version The Screen don't appear the apple yet, iTunes reports error 4013 or 4014 → cause: The AP part can be crossed down GND or 2-layers IC or HDD Error Usually when iPhone is processed iCloud, 2-layers IC or HDD will be easy crossed down GND Solution 1: Solution 2: replaced a other frame after restore iPhone to check removed proximity cable (ALS) after restore iPhone to check Solution 3: processed Compass IC (measured after remove/ replace IC), Next restore iPhone to check Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com Solution 4: Processed Wi-Fi IC (iP4s) (measured after remove/ replace IC), Next restore iPhone to check - The Screen had appeared the apple but can’t appear the bar to see the program is running → cause: can’t enough voltage for AP part or low Voltage (Check! The voltages supply for 2-layers IC) Step 1, iTunes reports - Error: 4013 or 4014 → cause: 2-layers IC (often is Flash) or HDD die - Error: 9, 40, 21… → cause: can be HDD HDD can fix by external Tool - Error: → cause: can be HDD - Broken the circuit from HDD to 2-layers IC as iP4s With iP5/ 5S broken the circuit from SEMI EEFROM to 2-layer IC Broken the line B1 The stage between step and step - Error: 14 → cause: can be HDD - Broken the circuit from HDD to 2layers IC as iP4s With iP5/5S broken the circuit from SEMI EEFROM to 2layer IC Broken the line B2 - Error: 53 → cause: can be Touch ID as iP 6/ 6+ and iPad Air 2, measure voltages or Touch ID can’t synchronize (SYNC) with mainboard The stage between step and step - Error Baseband: 1, 3, 16, 27, 29, 3194 → cause: can’t enough voltage or passed to down GND or the components of Baseband error - Error: 1, 3, → cause: can be CPU or crossed down GND or no enough voltage - Error: 27 → cause: can be CPU and Flash of Baseband no SYNC - Error: 29 → cause: can be Battery or Board (broken the circuits at the pins of Battery) Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 10 No-all, lost IMEI a Cause: often opened the pins of CPU b Solution: closed CPU Note! Can affcet to Flash and IF IC No network a Cause: opened the pins or lost 2G PA b Solution: closed or replace 2G PA Error touchscreen a Cause: opened the pins of touchscreen IC b Solution: closed or replace IC before need to check the pins of J5 socket Note! Can affect to Wi-Fi IC at behind Was fallen in the water Often damaged at socket of LCD, the components around Wi-Fi IC, LED _Flash IC If the water had gone into more, can affect to socket of the main camera in behind, affect to the power part, Audio and RF part a Doesn’t emit the light or doesn’t display the screen » Solution: check the curcuits at socket of LCD relate to FL3, FL4 (the LED line), FL7 (the line supply voltage for LCD), replace socket of LCD b lost Wi-Fi (the function switches-on Wi-Fi in iPhone is opaque), signal of Wi-Fi is low » Solution: measure the voltages supply for Wi-Fi part (check XW29_RF, L21 _RF), remake or replace Wi-Fi IC, or check the small components around Wi-Fi IC c Lost the LED _Flash or lights weakly, the machine doesn’t act but if plugged charger, it can act (this case also can meet, If the Vbatt line in the RF part was crossed down GND) » Solution: replace L9_RF, LED_Flash IC (U17) Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 17 - iP4s Damaged after the process used Error: Wi-Fi, the Battery was the quick loss and the hot machine, No-all (no IMEI), power-on failure due the voltages was crossed down GND a lost Wi-Fi (the function switch-on Wi-Fi in iPhone is opaque), signal of Wi-Fi is low » Solution: measure the voltages supply for Wi-Fi part (check XW6_RF), replace Wi-Fi IC, or check the small components around Wi-Fi IC (R46, R47, R106 R108_RF) Note! The process can affect to other functions as: toucscreen or LCD b The Battery was the quick loss and the hot machine, add with the network was lambent (often the line VCC2_PA was crossed down GND) » Solution: isolate U5_RF c No-all (no IMEI) When meet this error doesn’t restore If restore the iTunes will report error “ -1” » Solution: remove U1001_RF, connect by copper wire from A1 pin to A2 pin of this IC d Power-on failure due the voltages was crossed down GND » Solution: often was crossed down GND in the voltage lines: Vcc_main, PP1V8, PP1V2_CPU/ SOC, PP3V0_USB Searched the voltage line was crossed down GND after isolate the capacitors and ICs in this line e Sticked_on iCloud » To see the solution for iCloud Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 18 Has been fallen and shocked Error Touchscreen: often opened the pins of touchscreen Ic, the mainboard was flexed a Shows: touchscreen was lambent, doesn’t act a row or a colume b Solution: receive touchscreen doesn’t act Replace or connect from touchscreen IC to Socket by the copper wire No network, No all, don’t act Mic and Ear while calling, doesn’t receive SIM a Cause: opened the pins of CPU b Solution: the machine doesn’t have the network, check IMEI and reports for customer Remake CPU or give to other mainboard Was fallen in the water Error Wi-Fi a Shows: lost Wi-Fi (the function switches-on Wi-Fi in iPhone is opaque), signal of Wi-Fi is low b Solution: measure the voltages supply for Wi-Fi part (check XW6_RF) check and replace L65 _RF, replace Wi-Fi IC, or check the small components around Wi-Fi IC The Vbatt line was crossed down GND a Cause: C7_RF , C8_RF, U9_RF (supply voltage for RF Part) b Solution: isolate or replace them No -all a Cause: often is due the capacitors was crossed down GND or the inductors around U6_RF b Solution: cut the shield after search and isolate the capacitors in the line was crossed down GND or replace the inductors Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 19 - iP5 Damaged after the process used Error: plugged charger/ USB make for the hot machine, charging is slow The low battery was quick, doesn’t display LCD, power-on failure Observe if saw this cases add with auto power-off a Cause: the line E-DETECT was crossed down GND b Soluiton: measure TP21, 22, 23, 24 Replace U2 Note! Backup date before the process Power button doesn’t act or press hardly Replace the power cable No-all a Cause: CPU and Rom Error When restore, iTunes reports error (1, 3, 16, 1669) b Soluiton: replace 3-suites Has been fallen and shocked No network, No all, don’t act Mic and Ear while calling, doesn’t receive SIM a Cause: opened the pins of CPU (this is a problem often meet at iPhone 5) b Solution: the machine doesn’t have the network, check IMEI and reports for customer Remake CPU or give to other mainboard Lost the LED _Flash, often is L5 Doen’t emit the speaker, often is L4 No Accelerometer: opened the pins of U18, replace this IC The touchsreen doesn’t act: broken or opened U12, U14 Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 20 Was fallen in the water Error Wi-Fi a Shows: lost Wi-Fi (the function switch-on Wi-Fi in iPhone is opaque), signal of Wi-Fi is low b Solution: measure the voltages supply for Wi-Fi part (check XW1802_RF The Vbatt line was crossed down GND a Cause: often is due the capacitors around Power IC of AP b Solution: cut the shield, to search the capacitors was rusted to isolate Usually the capacitors in the lines as Vccmain or Batt-Vcc Power-on hanging the apple, appear more charter, auto reset, restore hanging the cable… a Cause: often touch the front-camera part (the proximity part), or touch compass IC b Solution: replace the related components Touch LED-Flash IC, Oxidation socket of LCD, touchsreen, front-camera and main camera - iP5s Damaged after the process used Error USB: similar as iP5, but IP5s have U3 (IC display), USB IC shared with 5C Charging is lambent, the cause opened the pins of Q2 Connect from A2 to B1 pins Error power-on hanging the apple, Boot the screen is green, red, hanging the apple (Note: auto reset; restore by iTunes reports Error Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 21 9: broken the line B1 or HDD; error 14: broken the line B2; due opened the pins of Semi eeprom Error IMEI cause No all, no netwwork, the process similar as iP5 Error hanging cable Restored by iTunes to see error after process Error the screen doesn’t display Check and replace U3 Has been fallen and shocked Don’t act Mic and Ear while calling, does’t receive SIM Error CPU Process similar as iP5 Main-Camera doesn’t open: opened the pins of U210 Camera không bung: hở Ic U210 (4 chân gần bên trái Onsemi EEFROM)(cấp áp 4V đến 2V8 - câu tắt 4V) Xử lý:Câu dây thẳng Boot appear the apple but the screen is green and auto reset Opened or broken the lines at the pins of U6 Restore by iTunes reports error: 14 or Boot lên táo xanh hình khởi động lại: hở đứt đường U6, (Reset báo lỗi 14 9) Xử lý:Xem bệnh thường gặp Sometimes doesn’t act the Ear, broken the line from J1 to U21 Remove IC to measure, remake or connect by the copper wire Thỉnh thoảng không loa trong: đứt đường từ J1 đến U21 Xử lý:Tháo Ic đo đạt, đóng lại câu dây Sometimes doesn’t act touchscreen, check the cuicuits between U12 and U15 The circuit is lambent, the process is very hard Thỉnh thoảng liệt cảm ứng: kiểm tra đường mạch U12 U15 Xử lý: Mạch chập chờn khó xử lý Was fallen in the water Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 22 Often damaged sub power IC (U3) for the screen Shows: often was passed down GND cause power-on failure or doesn’t display the screen, doesn’t act the touchscreen, Thường bị cấp áp U3 cho phần hiển thị hình (bị chạm gây nguồn khơng hiển thị hình, liệt cảm ứng; -> thay thế) Damaged the socket of the front-camera (affect to the proximity - check the voltages of this part, check inductors and resistors in socket J1) The socket the main-camera, or socket of touchscreen Máy rớt - ẩm nước thường bị socket camera trước (liên quan cảm biến áp tai, thường bị có nhiều đường áp, kiểm tra cuộn dây điện trở bị đứt socket J1), socket camera sau, socket hình cảm ứng - IP6/ 6+ Damaged in using process Hanging the cable error 53: check the cuicuits relate Touch ID Often happen with iPhone Plus and iPad Air (chip A8) Error Camera: check the votlage supply for DFU mode or Power IC of AP part Camera: kiểm tra cấp áp DFU: kiểm tra IC nguồn D ICLOUD SOLUTION FOR IPHONE - The steps to Remove iCloud for iPhone Step 1: Restore the computer Testing the running of the phone Test 3G: in deactive mode, iPhone 4s or higher when finished restore will automatically turn on 3G iPhone doesn’t have automatically turn on 3G Step 2: Process IMEI number (iPhone 4s or higher) Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 23 On the mainboard is damaged a Remove the CPU (wheezing to protect CPU) b Read Rom through the Pins of CPU on mainboard by Tool » If not, remove and read Rom at outside by Tool other o » If not, taken the suite other If read Rom ok (has File Rom), Check IMEI ok, process next On the mainboard iCloud a Remove the CPU (wheezing or grinding by CNC or manual labor) Often, grinding by CNC to protect mainboard b Write Rom form File Rom had have » If not, check processing » If ok, process next c Close CPU into motherboard (doesn’t have IMEI yet) d Restore iPhone » » If not, itunes will report error: o “27” CPU and Rom don’t have jointly machine o Or a error other is due CPU such as “1”, “3”… If ok, Test 3G o No 3G, is due CPU o Have word E, replace OSC 26 Mhz at RF o Have 3G, process next Step 3: Process Serial number On the mainboard is damaged a Remove HDD (wheezing to protect CPU) » 4s and iP5 can replace HDD other by repair serial number by Tool » iP5s, If HDD is damaged, must take the suite other On the mainboard iCloud Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 24 a Close HDD into motherboard (auto stick-on DFU) b Restore » » If not o 4s and iP5 replace HDD other o iP5s must take the suite other If ok o Done! Notice For iPhone a With CPU 8824 (sometimes with pair of a machine ) maybe will get an error 3194 For iphone 4s, a Required good CPU and Rom » Rom Read/ Write by Tool b HDD write Serial number from the IMEI number For iPhone 5s a Required good CPU Rom and Hard Drive Disk » Rom Read/ Write by software For iPhone 6, iPhone Plus a Current security : 2-layers Ic, HDD, CPU » 2-layers Ic security with Touch ID IC on the Home button, If damaged, Restore Error 53 » Replace the CPU and HDD when Restore Error 53 Notice Write serial number for HDD and test HDD by restoring is two different problems Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 25 E SOLUTION ICLOUD FOR IPAD 3G and Wi-Fi iPad stick-on iCloud : - Unassemble iPad and switch-on Wi-Fi mode Next restore iPad by firmwave of Wi-Fi iPad The methods switch-on Wi-Fi mode for iPad: iPad -3: removed R1205 after restore iPad (with firmwave of Wi-Fi iPad) iPad 4: removed R1205 after restore iPad If mainboard doesn’t have R1205, remove R1204 iPad mini: removed R1204 after restore iPad But if remove R1204 that iPad go-in Apple TV mode, must connect R1205 (bypass R1205) to restore iPad mini 2: Connected R1205 after restore But if don’t success, removed R1204 after restore iPad air: Removed R1506 after restore iPad air2: Remove iCloud ok but the Wi-Fi function don’t use - Replace 3-suites IC (CPU, Rom, HDD) as iPhone, this solution still has 3G Wi-Fi iPad stick-on icloud: - Solution 1: repair HDD Removed HDD after repair serial number (S/N) by external tool to can active But this solution may be affected to other Ic and sometimes damaged mainboard Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 26 - Solution 2: repalce HDD Abraded HDD by CNC after replace other HDD no iCloud and restore Notes: - iPad 2: HDD only used for itself - iPad 3: HDD used for itself and shared with 4S - iPad 4: HDD used for itself and shared with IP5 - iPad mini: HDD only used for itself - iPad Air mini 2: HDD used for itself and shared with 5S Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 27 F TERMS OF MOBLIE PHONE The pins of Battery - Vbatt is the positive electrode of the battery - Mass/ GND is the negative electrode of the battery In Board, the mass is metallic shield or the lines bordered yellow - BSI (Battery Size Indicator): The pin checks the electric current (A) of Battery - Temp (Temperature): The pins to check Temperature of Battery Observe the motherboard of common mobile phone: - It can be said, the hard part of mobile phone is created from three components Basic Electronic Components: In Board, they are the components have from to pins In Figure below, it is showed by number one (1) Such as: Resistor, Capacitor, Inductor, Fuse, Diode, Diode Zenner, LED, Transistor, Mosfet… Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 28 Devices: They are known as the components to communicate with users Such as: LCD, Touchscreen, Socket, Connector, Camera, SIM… IC (Integrated Circuit): in Board, they are the components have from pins or more or are the cubes In Figure above, it is showed by number two (2) The structure of a mobile phone is divided into four main blocks - Power Unit There are two functions Supply voltages for the system of AP This Block is composed of three components: Battery, power IC, IC Supply Voltages support for Power IC, called Sub Power IC) Recharge voltage for battery: Charging IC (from iPhone 3Gs or higher, Charging IC is integrated in Power IC) Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 29 - Processing Unit CPU: Controls the all operation of the system Memory: store and access data for CPU Memory has two types: Rom, Ram In the phone, memory is often called Flash - Basic Wave Block (RF Block) Basic Wave Block (2G - 3G - 4G), includes: Ant, Sw-Ant, Saw, Coupler IF Ic , PA, Cobba (CPU, Audio) Carrier and 13Mhz Oscillation Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 30 Basic Wave Block of iPhone 3Gs - External Interface Unit Distribution Upgrade Integrate additional functions Mobile phone has two important diagrams - The circuit diagrams (schematic) or is called the princible diagram It shows the operating princible of a machine or simpler it shows the components relate to a problem and the connector between them Address: 1114 February 3th Street, Ward 12, District 11, HCMC Phone: 1900.5555.34 Website: www.chamsocdidong.com 31 ... charging process of iPhone b Processing Unit » CPU controls the Baseband and stores IMEI » Flash stores Baseband and IMEI o iPhone 4s, iPhone 5/ 5s: Flash is replaced by Rom o iPhone 6/ Plus: Processing... (from iPhone 3Gs or higher, Charging IC is integrated in Power IC) b Processing Unit » 2-layers IC (CPU of AP part): Controls the all operation of iPhone (AP and RF) This is IC stores SHSH of iPhone. .. COLLECT THE ERRORS WHEN RESTORE IPHONE BY ITUNES April -2015 Version (iOS 7.xx - 8.xx) Require the connection between the computer and iPhone is really good Usually iPhone can be cable or apple