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FLY IQ458 Service Manual
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FLY IQ458 Service Manual

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SERVICE MANUAL
Date
Version
Maintenance Level
Author
V1.0
L1~L4
2014-02-26

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Summary of Contents for FLY IQ458

  • Page 1 SERVICE MANUAL Date Version Maintenance Level Author V1.0 L1~L4 2014-02-26...
  • Page 2 CAUTIONS Please refer to the phone’s user’s guide for instructions relating to operation, care, and maintenance, which include important safety information. 1. Servicing and alignment must be undertaken by qualified personnel only. 2. Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn.
  • Page 3 GENERAL REPAIR INFORMATION 1. Make sure your testing equipment is functioning properly before beginning repair work. 2. Before starting repairs you must observe ESD precautions such as being in your ESD protected area and connecting your wristband. 3. Use gloves to avoid corrosion and fingerprints. 4.

  • Page 4: Service Tools

    Chapter 1 Service tools 850 Rework station & Solder Iron Multimeter DC power supply...
  • Page 5 Digital Oscillograph Screw driver and tweezers Solder wire...
  • Page 6 Flux paste Wrist grounding strap, Antistatic gloves Chapter 2 Baseband Circuit Analysis...
  • Page 7 2.1 Mobile solution MT6582 is a highly integrated baseband platform incorporating both modem and application processing and connectivity subsystems to enable 3G smart phone applications. The chip integrates a Quad-core ARM Cortex-A7 MPCore operating up to 1.3GHz, an ARM Cortex-R4 MCU and a powerful multistandard viedo accelerator .
  • Page 8 Figure 2-1: Block diagram MT6572 is a highly integrated 3G system-on-chip (SOC) which incorporates advanced features e.g. HSPA R8 modem, Quad-Core ARM Cortex-A7MPCore operating at 1.3GHz, 3D graphics (OpenGL|ES 2.0), 8M camera ISP, LPDDR2/3 533 MHz and High-Definition 1080p video decoder. MT6582 helps phone...
  • Page 9 manufacturers build high-performance 3G smart phones with PC-like browser, 3D gaming and cinema class home entertainment experiences. 2.3 Baseband Chip Pin Description (U100 MT6582) 2.3.1 MCU Subsystem General  Smartphone two MCU subsystems architecture  S LC NAND flash OR EMMC flash bootloader AP MCU subsystem ...

  • Page 10: External Memory Interface

    Figure 2-2: CPU U100C MCU part 2.3.2 External Memory Interface control channel data Figure 2-3: CPU U100F External Memory part addres...
  • Page 11 External memory interface  SupportsLPDDR2/3up to 2GB  32-bit data bus width  Memory clock up to 533MHz  Supports self-refresh/partial self-refresh mode  Low-power operation  Programmable slew rate for memory controller’s IO pads  Supports dual rank memory devices ...
  • Page 12 Figure 2-4: Flash memory...
  • Page 13 2.3.3 Power Manage Unit Interface Power on key press input , Low active Figure 2-5: CPU U100D----- Power and Supply part A (Charger\PWR ON\SIM)

  • Page 14: Battery Charging

    Battery charging The charger controller senses the charger input voltage (CHRIN) from either a standard AC-DC adaptor or an USB charger. When the charger input voltage is within a pre-determined range, the charging process is activated. This detector can resist higher input voltages than other parts of the PMIC.
  • Page 15 (VBAT<3.2V, switched-off state), CC mode (constant current mode or fast charging mode at the range of 3.2V<VBAT<4.2V) and CV mode (constant voltage mode) to optimize the charging procedure for Li-ion battery. 2. Pre-Charging mode When the battery voltage is in the UV state, the charger operates in the pre-charge mode.
  • Page 16 No charging Charger detector (4~7V) Vbat>3.2V PRE-CHARGE CH_EN=1 Vbat>3.2V CONSTANT CURRENT MODE CH_EN=1 Vbat>4.2V NO-CHARGE CONSTANT VOLTAGE MODE Vbat>4.3V CHARGE OFF Vbat<4.3V...

  • Page 17: Power On Sequence

    Dual SIM Interface There are two SIM card interface modules to support two SIM cards simultaneously. The SIM card interface circuitry of PMU meets all ETSI and IMT-2000 SIM interface requirements. It provides level shifting needs for low voltage GSM controller to communicate with either 1.8V or 3V SIM cards. All SIM cards contain a clock input, a reset input, and a bi-directional data input/output.
  • Page 18 the main battery is below the 3.2V threshold. When the battery voltage is greater than 3.2V, the UVLO comparator switches and the threshold is reduced to 2.75V,which allows the handset to start smoothly unless the battery decays to 2.75v and below . Once the MT6582 enters UVLO state, it draws very low quiescent current.
  • Page 19 Figure 2-10: PMU LDO output voltage list...

  • Page 20: Camera Management

    2.3.4 Camera Management Camera ISP: 8MP MIPI/Parallel I/F, EIS, face detection Image Signal Processor − Integrated image signal processor supporting 13MP  Supports electronic image stabilization  Supports video stabilization  S upports noise reduction  Supports preference color adjustment ...
  • Page 22 2.3.5 LCM Management qHD(960*540) − Supports portrait panel resolution up to qHD (960x540)  MIPI DSI interface (4data lanes)  Embedded LCD gamma correction  Supports true colors  S upports color enhancement  S upports adaptive contrast enhancement  Support image/video/graphic sharpness enhancement...

  • Page 23: Audio Management

     4 overlay layers with per-pixel alpha channel and gamma table  Supports spatial and temporal dithering  Supports side-by-side format output to stereo 3D panel in both portrait and landscape modes  Supports dynamic backlight scaling Figure 2-13: LCM connector Figure 2-14: LCM Backlight Driver circuit 2.3.6 Audio Management...
  • Page 24 Figure 2-15 CPU U200-----Audio processor part Audio circuit description Figure 2-16: Audio output to Receiver...
  • Page 25 Figure 2-17: MIC circuit of Headset Figure 2-18: Audio circuit of Handset MIC...
  • Page 26 Figure 2-19: Ring tong circuit Download data / USB communicate channel 2.3.7 I/O interface circuit description (IO2090) Debug Channel Figure 2-21: I/O interface circuit...
  • Page 27 Bootrom USBDL Flow ▪ How to enter bootrom USB download mode? – Auto-Detect Mode (default setting) – GPIO Only Mode (key matrix KCOL0 tie to GND)
  • Page 28 2.3.8 4in1 combo module circuit Figure 2-25: Combo module circuit diagram Specification: WiFi/BT/GPS/FM Tx/Rx full-featured combo module WiFi self-calibration function embedded Supported WiFi 11b/g /n features Supported WiFi SDIO 2.0 (4-bits and 1-bit up to 50MHz) Bluetooth specification 3.0+HS (802.11 AMP) compliance Supported Bluetooth 4.0, BT Low Energy (LE) GPS/GALILEO/QZSS/SBAS(WAAS/MSAS/EGNOS/GAGAN) support Best GPS sensitivity: -165 dBm tracking sensitivity, -160 hot start sensitivity.
  • Page 30 WiFi / BT / GPS / FM combo ▪ Size : 6.3 x 5.4x1.0 mm ▪ Pad Pitch : 0.5mm ▪ Support Interface: – SDIO (WiFi) – UART (BT / GPS / FM) •Block Diagram – PCM / I2S (BT) –...
  • Page 31 Transceiver Description Figure 3-5: Receive Transceiver circuit...
  • Page 32 Mobile solution diagram----GGE(GSM/GPRS/EDGE) SDATA MT6166 MT6582 RF77593 Figure 3-1: RF Interface Block Diagram Figure 3-2: IQ Signal Process Block Diagram...
  • Page 33 RF receiver circuit description GSM850/900 SF Transceiver SKY77593 MT6166 MT6582 DCS1800/1900 SF Figure 3-3: PA switcher circuit Figure 3-4: Receive saw-filter circuit...
  • Page 34 RF transit circuit description Transceiver SKY77593 MT6166 MT6582 PA ENABLE Auto POWER CONTROL(L10) E-GSM IN ANTENNA POWER...
  • Page 35 Mobile solution diagram----WCDMA SAYFP1G95CA0B00 RF3232 MT6582 MT6166 RF3232 SKY77593 Figure 3-1: RF Interface Block Diagram...
  • Page 36 Figure 3-2: IQ Signal Process Block Diagram RF receiver circuit description Transceiver SAYFP1G95 RF3232 MT6166 MT6582 Figure 3-3: PA switcher circuit Figure 3-4: Receive saw-filter circuit...
  • Page 37 RF transit circuit description Transceiver SAYFP Sky775 1G95 SKY77593 MT6166 MT6582...
  • Page 38 Figure 3-4: RF transit circuit .pin outs...

  • Page 40: Troubleshooting

    TROUBLESHOOTIng YES  NO  Make the phone connect the power supply and find the current swing at 50-100mA Upgrade the software Check and NO  replace the I/O connector Check the power manage supply output： VCCRE 1.8V NO  VDD 2.8V NO  AVDD 2.8V Replace or VTCXO 2.8V reweld...
  • Page 41 Cannot power on-low or no current Make the phone connect the power Make the phone connect the power supply and find low or no current supply and find low or no current NO  Check battery Clean，reweld connector and power key or replace it YES ...
  • Page 42 Cannot Power on-large current Make the phone connect the power supply and then press power key find large current make the phone heat Check if the phone leakage (current 0mA is normal) Use the Check and touch YES  replace RF  ...
  • Page 43 Repair flow for phone dead Phone dead Upgrade the software can Upgrade the settle the defect issue? Software. Check battery connector Clean or replace the battery and battery touch point if or battery connector. is dropped or dirty? Check the keypad if stuck or Check and reinstall the keypad touch panel do not work to or replace the touch panel.
  • Page 44 No display or display abnormality No display or display abnormality after power on Check LCD if damage or Change LCD liquid flow out Check LCD connector Clean/re-solder is OK or not connector Change LCD FPC Problem solve Check if 10 PIN of LCM400 have signal or Upgrade software not, check 7...
  • Page 45 TP can’t work TP can’t work Do calibration first Problem solve Upgrade software Problem solve Re-solder Check the connect status or reassemble between TP and PCB Problem solve Change TP Check voltage of PCBA FPC connector is OK or not Check the working status of B420 Change chip bead is Ok or not...
  • Page 46 Insert SIM Repair Process...
  • Page 47 N0/weak signal trouble shooting...
  • Page 49 Receiver low voice or no voice...
  • Page 50 No/Low sound from MIC...
  • Page 51 Does not charge – remind error charge...
  • Page 52 Does not charge – no charge...
  • Page 53 Stand-by short time...
  • Page 54 Can’t read T-Flash card...
  • Page 55 WIFI、BT、FM 、GPS defect repair flow chart...

  • Page 56: Factory Test

    factory TEST...