FLY E185 Service Manual
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FLY E185 Service Manual

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FLY E185
Service Manual
SERVICE MANUAL
FLY E185
MOBILE TERMINAL
(V1.0)
COMPANY CONFIDENTIAL
All Rights Reserved
CKT Confidential
Page 1 of 47

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  • Page 1 FLY E185 Service Manual SERVICE MANUAL FLY E185 MOBILE TERMINAL (V1.0) COMPANY CONFIDENTIAL All Rights Reserved CKT Confidential Page 1 of 47...

  • Page 2: Table Of Contents

    FLY E185 Service Manual CONTENT CHAPTER 1: SUMMARY ........................4 CHAPTER 2: PCBA OVERVIEW .......................5 2.1 T ............................5 OP SIDE 2.2 B ..........................6 OTTOM SIDE CHAPTER 3: EXPLANATION OF SCHEMATIC................7 3.1 T MT6236....................7 YPICAL APPLICATION OF 3.2 P .......................8 RINCIPLE OF CIRCUIT 3.2.1 GSM RF AD6548 application ....................8...
  • Page 3 FLY E185 Service Manual 5.2 USB C .......................38 ABLE RIVER NSTALL 5.3 U ........................40 PGRADE ROCEDURE 5.4 FAQ ..............................45 6.1 D ....................45 ISASSEMBLING AND ASSEMBLING CKT Confidential Page 3 of 47...

  • Page 4: Chapter 1: Summary

    MP3/MIDI/WAV/AMR/AAC, MP4/3GP, FM, one Camera, Bluetooth, PC Sync, 3D G-sensor, BT, etc. E185 can support GSM 900/1800MHz, also GPRS. In order to support technicians to be familiar with E185 handset, please master the method of servicing. In addition, we provide corresponding technical data, including MTK BB (Baseband), RF and software.

  • Page 5: Chapter 2: Pcba Overview

    FLY E185 Service Manual Chapter 2: PCBA Overview 2.1 Top side CKT Confidential Page 5 of 47...

  • Page 6: Bottom Side

    FLY E185 Service Manual 2.2 Bottom side CKT Confidential Page 6 of 47...

  • Page 7: Chapter 3: Explanation Of Schematic

    FLY E185 Service Manual Chapter 3: Explanation of Schematic 3.1 Typical application of MT6236 Based on a multi-processor architecture, MT6236 integrates an ARM926EJ-S core, the main processor running high-level GSM/GPRS protocol software as well as multimedia applications, two digital signal processor core, which manages the low-level MODEM as well as advanced...

  • Page 8: Principle Of Rf Circuit

    FLY E185 Service Manual Microcontroller Coprocessors: runs computing-intensive processes in place of the Microcontroller; DSP Peripherals: hardware accelerators for GSM/GPRS channel codec; Multimedia Subsystem: integrates several advanced accelerators to support multimedia applications; Voice Front End: the data path for converting analog speech to and from digital speech;...

  • Page 9: Analog Front-End& Analog Blocks

    FLY E185 Service Manual Figure 3.2.1 GSM RF circuit From the chart we can see that the RF part is mainly composed of a highly integrated CMOS transceiver chip (AD6548), some RX Saw filters, reference crystal oscillator, power amplifier/antenna switch module (2in1), antenna and the matching components between each other.
  • Page 10 FLY E185 Service Manual uplink analog-to-digital (D/A) converters as well as I/Q Gain Mismatch for downlink digital-to-analog (A/D) converters in TX/RX mixed-signal modules. The timing of bit streaming through Baseband Front End is completely under control of TDMA timer. Usually only either of uplink and downlink paths is active at one moment.
  • Page 11 FLY E185 Service Manual 3.2.2.2 Downlink Path (RX Path) On the downlink path, the sub-block between RX mixed-signal module and Baseband Serial Ports is RX Path. It mainly consists of two parallel digital FIR filter with programmable tap number, two sets of multiplexing paths for loopback modes, interface for RX mixed-signal module, Interference Detection Circuit, I/Q Gain Mismatch compensation circuit, and interface for Baseband Serial Ports.
  • Page 12 FLY E185 Service Manual 3.2.2.3 Uplink Path (TX Path) The purpose of the uplink path inside Baseband Front End is to sink TX symbols, from DSP, then perform GMSK modulation or 8PSK Modulation on them, then perform offset cancellation on I/Q digital signals, and finally control TX mixed-signal module to make D/A conversion on I/Q signals out of GMSK Modulator or 8PSK Modulator with offset cancellation.
  • Page 13 FLY E185 Service Manual be input to TX mixed-signal module that contains two DAC for I/Q signal respectively. Auxiliary Calibration Circuit - 540 kHz Sine: By setting “1” to SGEN (Sine Tone Generation) in TX_CFG control register, the BBTX output will become 540 kHz single sine tone, which is used for Factory Calibration scheme for Mixed Signal Low Pass Filter Cut-off Frequency Accuracy.
  • Page 14 FLY E185 Service Manual I/Q Swap: By setting “1” to IQSWP in TX_CFG control register, phase on I/Q plane will rotate in inverse direction. This option is to meet the different requirement form RF chip regarding I/Q plane. This control signal is for GMSK Modulation only.
  • Page 15 FLY E185 Service Manual 3.2.2.4 Timing Generator Timing is the most critical issue in GSM/GPRS applications. The TDMA timer provides a simple interface for the MCU to program all the timing-related events for receive event control, transmit event control and the timing adjustment. Detailed descriptions are mentioned in below figure:...

  • Page 16: Principle Of Power Management Circuit

    FLY E185 Service Manual 3.3 Principle of Power Management circuit 3.3.1 Charger and protection logic Over-temperature Protection: If the die temperature of PMU exceeds 150°C, the PMU will automatically disable all the LDOs except the V . Once the over-temperature state is resolved, a new power on sequence is required to enable the LDOs.

  • Page 17: Battery Charging Circuit

    FLY E185 Service Manual sequence. In addition, when the battery voltage is getting lower and lower, it will enter UVLO state and the PMU will be turned-off by itself, except for V LDO, to prevent further discharging. Once the PMU enters UVLO state, it draws low quiescent current. The RTC LDO is still working until the DDLO disables it.
  • Page 18 FLY E185 Service Manual 1. Charge Detection The PMU charger block has a detection circuit that senses the charger plug-in/out and provides the correct information to the baseband. If CHRIN is over 4.3V, charger detection will be report to baseband and charger circuit will be enabled. If the CHRIN voltage is over 7V, charger will send an invalid signal to baseband for further indication.
  • Page 19 FLY E185 Service Manual 2. Pre-Charging mode When the battery voltage is below the CC threshold, the charging status is in the pre-charging mode. There are two steps in this mode. While the battery voltage is deeply discharged below 2.7V, a 50mA trickle current is used for charging the battery.
  • Page 20 FLY E185 Service Manual 55µA. Hence, the controlled charging current could be calculated as I = βx 55 µAx CSDAC_DATA\[7:0]. 8. Current Sense A current sense circuit measures the voltage difference between VSEN and VBAT, which could be used as a feedback signal for CSDAC driving control.

  • Page 21: Principle Of Baseband Circuit

    FLY E185 Service Manual Figure 3.3.3-2 Charging circuit 3.4 Principle of Baseband circuit 3.4.1 Whole introduction of baseband circuit MT6236 Function Block Diagram Figure 3.4.1 3.4.2 Memory Management To provide the greatest capacity for expansion and maximum bandwidth for data intensive applications such as multimedia features, MT6236 supports up to 3 external memory devices through 16-bit host interface.

  • Page 22: Sim Card Interface

    FLY E185 Service Manual Figure 3.4.2 Boot sequence 3.4.3 SIM Card interface The MT6236 contains two dedicated smart card interfaces to allow the MCU to access the two SIM cards. Each interface can operate via 5terminals. As shown is the Figure 22, SIMVCC, SIMSEL, SIMRST, SIMCLK and SIMDATA are for one SIM interface, while SIM2VCC, SIM2SEL, SIM2RST, SIM2CLK and SIM2DATA are for the other one.
  • Page 23 FLY E185 Service Manual The SIMVCC is used to control the external voltage supply to the SIM card and SIMSEL determines the regulated smart card supply voltage. SIMRST is used as the SIM card reset signal. Besides, SIMDATA and SIMCLK are used for data exchange purpose.

  • Page 24: Audio Frequency Circuit

    FLY E185 Service Manual 3.4.4 Audio frequency circuit The audio front-end essentially consists of voice and audio data paths. Figure 128shows the block diagram of the audio front-end. All voice band data paths comply with the GSM 03.50 specification. Mono hands-free audio or external FM radio playback paths are also provided. The audio stereo path facilitates CD-quality playback, external FM radio, and voice playback through a headset.
  • Page 25 FLY E185 Service Manual Block diagram of digital circuits of the audio front-end To communicate with the external Bluetooth module, the master-mode PCM interface and master-mode I2S/EIAJ interface are supported. The clock of PCM interface is 256 kHz while the frame sync is 8 kHz.
  • Page 26 FLY E185 Service Manual The Audio frequency circuit shows as below: Figure 3.4.4-1 Microphone circuit Figure 3.4.4-2 Speaker circuit CKT Confidential Page 26 of 47...
  • Page 27 FLY E185 Service Manual Figure 3.4.4-3 Receiver circuit Figure 3.4.4-4 Earphone circuit (MIC) Figure 3.4.4-5 Earphone circuit (Receiver) CKT Confidential Page 27 of 47...

  • Page 28: Lcd Display Circuit

    FLY E185 Service Manual Figure 3.4.4-6 3.5 mm Audio Jack circuit 3.4.5 LCD display circuit MT6236 contains a versatile LCD controller which is optimized for multimedia applications. This controller supports many types of LCD modules and contains a rich feature set to enhance the functionality.

  • Page 29: T-Flash Card Circuit

    Figure 3.4.6 T-Flash card interface circuit 3.4.7 5Pin System interface E185 use a 5Pin Micro USB as the system interface. Pin1 is for VCHG and USB_PWR. Pin2 and Pin3 are used for Data Transmit (TXD1) and Receive (RXD1), and also controlled by U551 to switch to UART port, which are used for code download and calibration.

  • Page 30: Fm Radio Circuit

    FLY E185 Service Manual 3.4.8 FM radio circuit AR1000 is FM receiving module. FM_ANT is used to receive the radio signal from the antenna, FM_VCC is the 2.8Vpower supply, GPIO83_FM_32K is the reference clock, GPIO54_FM_SDA and GPIO55_FM_SCL is control signal from the baseband CPU, FM_INR and FM_INL are the stereo audio output.
  • Page 31 FLY E185 Service Manual synchronization or external pixel clock synchronization. The main purpose of TG is to create data, and then generate grabbed area of Bayer data or YUV422/RGB565 data to the lens/sensor compensation unit. Lens/sensor compensation unit generates compensated raw data to the color process unit in Bayer raw data input mode.

  • Page 32: Bluetooth Circuit

    FLY E185 Service Manual 3.4.10 Bluetooth Circuit Figure 3.4.10 Bluetooth circuit 3.4.11 Vibrator circuit and G sensor Figure 3.4.11-1 Vibrator circuit CKT Confidential Page 32 of 47...

  • Page 33: Chapter 4: Failure Analysis

    FLY E185 Service Manual Figure 3.4.11-2 G sensor Chapter 4: Failure Analysis Actually, the handset’s main failure cases are: Power on problem (No power on, Auto-Power on/off, Phone totally dead, Restart automatically) Display problem (No display, LCD backlight malfunction, Segments missing, Black display,...

  • Page 34: Power On Problem

    FLY E185 Service Manual should diagnose the RX part first before TX. 4.1 Power on problem About the power on problem, first, we should confirm the current of the handset, because the current is very useful for us to analyze the failure. When we connect the handset to DC power supply, we can clearly read the current of this handset.

  • Page 35: Display Problem

    FLY E185 Service Manual 4.2 Display problem LCD is connected by Solder FPC on the PCB directly. A bad soldering can lead to display failure, so you can check it with your eyes firstly and then measure the Vcc Pin of LCD with digital multi-meter.

  • Page 36: No Voice In Speaker

    Speaker is 8ohm. If not, it means the speaker is broken. Otherwise you need to check the Audio PA circuit to find out the problem. After repaired, you can test it on engineering mode again. By the way, E185 speaker is solder on the main-board.

  • Page 37: Fm Radio Failure

    FLY E185 Service Manual 4.8 FM radio failure If the FM can not work well, please check whether the power supply, clock signal, audio output signal is working normally, then re-solder the FM chip AR1000. 4.9 Signal problem RF failure often occurs in calibration or capability test, the best diagnostic method is to use wireless universal tester, spectrum analyzer and signal source matched with META tool to test it.
  • Page 38 FLY E185 Service Manual Battery for VIVI It gives the power to Mobile phone. PL2303 Prolific Driver Driver version must be 2.0.5.111 or higher Upgrade cable “PL-2303 Driver Installer” must be installing. Recommended PC HW requirements: • Computer processor: Pentium 700 MHz or...
  • Page 39 FLY E185 Service Manual Figure 5.2-2: COM port Number of “Prolific USB-to-Serial” Step three: Connect the mobile phone with upload cable. (Attention: Do not power on the phone at this moment) Figure 5.2-3: Hardware Structure of Software Upgrade CKT Confidential...
  • Page 40 FLY E185 Service Manual 5.3 Upgrade Procedure Attention: For using the Flash tool to download software for handset, you must keep the battery have enough power to support the download process. Otherwise, maybe the handset’s memory will be broken by the suddenly interrupted. Or the RF parameter will be losing by the unfinished upgrade process.
  • Page 41 FLY E185 Service Manual Figure 5.3-2: Download Agent File Setting Figure 5.3-3: Scatter File Setting Step three: After select the “scatVIVI”, all of the files which need to be downloading are listed in the window. CKT Confidential Page 41 of 47...
  • Page 42 FLY E185 Service Manual Figure 5.3-4: Download *.bin File Setting Step four: Click “Options”: Firstly, select the right “COM port” in use. Secondly, select “Format FAT (Auto)…”. At last, click “Backup and Restore (No action)” and then select “Backup---> Download/Format---> Restore”.
  • Page 43 FLY E185 Service Manual Figure 5.3-6: “Format FAT(AUTO)” Setting Figure 5.3-7: “Backup and Restore” Setting Step five: Click “Download”, the phone. The progress bar will move and and then power on begin downloading. You need to wait for a few minutes.
  • Page 44 FLY E185 Service Manual Figure 5.3-9: Download process Step six: Downloading succeeds when the below picture occurs. Figure 5.3-10: Downloading succeed CKT Confidential Page 44 of 47...
  • Page 45 FLY E185 Service Manual 5.4 FAQ Case one: How to confirm the downloading already successful? Solution: When the below picture pop-up, it means the download process already successful. Case two: What should we do, when the download process is fail and mobile can’t power on? Solution: Firstly, using the same download tool “Flash_Tool”...
  • Page 46 FLY E185 Service Manual Step3: wheel the screws Step 4: disassembling the bottom cover Step 5: Disconnect the touch screen FPC Step6: Take out the main board Step7: Remove the speaker and vibrator Step7: Remove the camera CKT Confidential Page 46 of 47...
  • Page 47 FLY E185 Service Manual E185 Mainly components as following, TIP: 1. Reversing the disassembling procedure is the assembling process. 2. After modifying the power key, please pay attention to the “POWER KEY” board: CKT Confidential Page 47 of 47...

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