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FLY EZZY Service Manual

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FLY EZZY
SERVICE MANUAL

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Summary of Contents for FLY EZZY

  • Page 1 FLY EZZY SERVICE MANUAL...

  • Page 2: Table Of Contents

    CONTEANT LIST Chapter 1: Summary Chapter 2: Exploding Diagram Chapter 3: Explanation of Schematic Chapter 4: Failure Analysis Chapter 5: Manual of tool software Chapter 6: Tools List...

  • Page 3: Chapter 1: Summary

    It also supports MMS and increment service which facilitate your work and entertainment. In order to support technicians to be familiar with FLY EZZY handset, please master the method of servicing. In addition, we provide corresponding technical data, including CKT base band, RF and software. There are also many base band and RF test reference points and description of circuit.

  • Page 4: Chapter 2: Exploding Diagram

    Chapter 2: Exploding Diagram The main board PCB...
  • Page 5 The main board placement...

  • Page 6: Chapter 3: Explanation Of Schematic

    Chapter 3: Explanation of Schematic MTK6223A AD6548 MTK6223A Picture 3.1 MT6223A principle picture 3.1 Principle of RF circuit 3.1.1 Principle of receiver circuit 3.1.1.1Rx signal flow chart: Picture 3.1.1 Receive signal flow frame 3.1.1.2 Main function of RF RF part generally means the analog RF and IF process system ,including Antenna system、 TX path、RX path、Analog modem and Frequency Synthesizer...
  • Page 7 RF Circuit deals with the RX and TX of wireless signal, with responsibility for the bidirectio Transmission of speech and data between the MS and BS through the air interface. In detail RX part Accomplishes the AGC amplifying, mix and demodulation of RF weak signal received from BS, The Final signal output from RX part is the analog baseband I/Q signal.
  • Page 8 RX Saw filter Circuit 3.1.3 Translation Loop Direct VCO Modulator –Integrated TX VCO and tank –External TX filters eliminated –Integrated Loop filter components –Transmit Path AD6548 uses only a single VCO source to derive the local oscillator signal for both the Feedback Down- Converting Mixer and the Quadraturemodulator TX PA: SKY77542...
  • Page 9 TX PATH: 3.14 26MHz Clock: –The entire system including V CO, tank, fractional N dividers, sigma delta compensation, charge pump and loop filters are fully integrated. – The only external component is the frequency reference. 26MHz Clock Reference circui 3.1.5 High performance multi ban d PLL system –Fast Fractional-N Synthesizer...
  • Page 10 – Integrated Local Oscillator VCO –Fully Integrated Loop fil ters –Crystal Reference Oscillator & Tuning System .1.6 Po wer Management – Integrated LDOsallow direct battery supply connection 3.1.7 Frequency ranges The frequency ranges of the synthesizer for RX mode: RX mode E-GSM 900 925.2MHz ~ 959.8MHz DCS 1800...
  • Page 11 3.1.3 AD6548 Function Block Diagram...
  • Page 12 3.2Principle of base band circuit 3.2.1 Whole introduction of base band circuit 3.2.2 Explanation of power circuit and in-and-out circuit Power source is provided by MTK MT6223A and periphery components, main function as below: 2.8V-5.5V Input Range Charger input up to 8V Seven LDOs optimized for specific GSM Sub-systems One LDO for RF transceiver High operation efficiency and Low stand-by current...
  • Page 13 ．7 channel power supply MT62 23A 7 channe l power supply: Power Function VCORE 1.8V/1 Digital core voltage LDO output 2.8V Digital I/O voltage LDO output AVDD Analog LDO output 2.8V VCTXO Crystal or VCTCXO LDO output 2.8V VMEM 1.8V/2.8V External memory LDO ou tput VSIM...
  • Page 14 After the handset power off, the pin PWRKEY is pulled high. The pull-up resistance is inside the chip .When the power key is pressed, the pin PWRKEY is pull low, then the MT6223A turn on all the Power supply high. At that time, the power function and the baseband chip enter working status.
  • Page 15 Needs power support when working. The MICBIASP/N port of the baseband chip supports bias Voltage for Mic. The EARPHONE port of the FLY EZZY is dual-used with the USB port. For more details Please refer to “communication ports” in later part.
  • Page 16 1、Receiver Figure 3.2.5 Circuit of receiver 2、Louder speaker Figure 3.2.6 Circuit of louder speaker...
  • Page 17 3、 Handset microphone Earphone igure 3.2.7 Circuit of MIC bias voltage circuit of mobile phone 、Hands-free microphone Figure 3.2.8 Circuit of Hands-free microphone 3.2.5 LCD circuit...
  • Page 18 Memo ry and all the periphery equipments used the same bus based on the 1 generation base band chip That made the system very slow. Considering that, MTK have altered the hardware structure to separate The periphery equipm ents (like LCD and NAND etc.) from memory bus a nd all of them use the 52M System clock simu ltaneously...
  • Page 19 3.2.8 T－Flash circuit T-Flash card interface: MT6233A VDD is supplied by 3.2.10 FM U600 is the FM chip to supply the function of FM radio.
  • Page 20 3.2.11 key interface When key is pressed down, the matrix KCOLX status is pulled down to low. Interrupt occur Then Baseband can judge the key’s location, so system implements corresponding function.

  • Page 21: Chapter 4: Failure Analysis

    4.1.2 Display failure FLY EZZY is a bar phone, LCM is soldering on the PCB directly. A bad soldering can lead to display Failure, you can check it with your eyes or measure the PIN with digital multimeter, if the soldering is OK, maybe it is the problem of LCM or MAINPCBA.
  • Page 22 4.1.4 Keys failure ey circuit is simple, check the net is short or not. If the issue is still there, you need to check The BB chip at last. 4.1.5 Voice cannot be sent or received This often occurs in a mobile phone. You can enter into engineering mode by inputting *#060905#, First you go to the test item “receiver”, and then you can hear “du du”...
  • Page 23 4.1.9 Cannot download software There are many reasons that can lead to download failure, but the problem of the analog switch IC, Which is used to control the dual-used port by headset and UART, is the most common? So you need to Pay more attention to it.

  • Page 24: Chapter 5: Manual Of Tool Software

    Chapter 5: Manual of tool software 5.2 Flash Tool 1) Run “flash tool”, then you can see the window as below. 2) Click File, first click” Open Download Agent …”, choose“CUSTOM_AllInOne_DA’’ in a Pop-up window; then click “Open Scatter—loading file…”，choose “scat”; At last, click “ROM”, Then you can select the software (usually saved as a .bin file) which you want to download...
  • Page 25 3) Connect the software download cable to the USB port of computer. 4) Click” Options”, choose right“COM port” in use, then click” Format FAT…”choose” Auto Format FAT” in a pop-up window. Other settings you can leave them as “software default 5) Download”.
  • Page 26 When need to download software · Upgrade software to higher version. Bugs of function and performance will appear during Using the handset. To improve the function and performance of the handset, the Manufacturer will improve the software and release new software version. Users can download new version to improve the function and performance of the handset.
  • Page 27 RF Tool PM 5.3.2 The features of META PM is used for measuring the receiver Rx level at a given RX channel:...
  • Page 28 Testing result of Power At first you should configure the Universal wireless communication tester such as Agilent 8960 or R&S CMU200 please follow the below picture for your configuration guide:...
  • Page 29 In META page PM, please click RX Path Loss Setting into AGC PATH LOSS setting page. Click Upload from flash button to read the RX path loss parameter form the mobile. If you have not loaded the correct database file yet, META will notice you to open a database. Please follow it and then you will see the target RX path loss parameters for different channels in the AGC path loss window.
  • Page 30 Follow below settings and press ‘start’ button to active RX measurement. Due to the System －70dbm,The Ant power reported from the mobile should simulator (8960) downlink Cell power be about －70dbm, tolerance+-5dB. Otherwise it means there is some defect with RX path. Please Check the GSM RX SAW and the surrounding circuit, like ASM and RF test connector.
  • Page 31 RF Tool TX level and profile TX level and profile is intended for checking the Transmitter’s output power, ramping profile at a given channel and power control level. TSC 为 5 TX level and profile Set the 8960 to non-signal mode...
  • Page 32 Set Expect burst TSC code of 8960 the same as META indicated. CONFIDENTIAL Set 8960 Traffic band for EGSM, Traffic Channel to 20,MS TX Level:5 and wait for receiving...
  • Page 33 the MS burst. Press GMSK level and ramp setting button into GMSK APC profile setting page：...
  • Page 34 Follow below setting page the set the corresponding TX parameters：ARFCN, TSC, PCL DAC etc. Then click Start button to start transmitting burst.
  • Page 35 If the Target MS’ TX function is OK you may see a TX PVT profile from the 8960 as follows:...
  • Page 36 If you can not see anything or it shows fail in the 8960’s PVT window, please follow below debug wizard to check and remove all the failure about TX path. 1. First of all we use oscilloscope to check PA TX enable control signal waveform：PA_EN, The normal case shows below;...

  • Page 37: Chapter 6: Tools List

    ：VAPC （GSM LEV5） 2. PA Vapc control signal waveform Tools List Chapter 6: 5.1 Downloading Operation Manual Reference: Flash_tool.exe 5.2 Write SN Operation Manual Reference: Maui META ver. 6.0952.0 5.3 Calibration Operation Manual Reference: Maui META ver. 6.0952.0...