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N501 C t S i N501 Customer Service Manual

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Mediacom G501 Service Manual for repair - Riparazione Mediacom G501

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  • N501 C t S iN501 Customer Service Manual

  • .MobilephoneIntroduction1. Features Android4.4 Capacitive Touch screen

    / / / / FM radio /Bluetooth/WIFI/GPS/

    2. Product CharacteristicsPl f MTK6582M Platform :MTK6582M

    MCP:4GB ROM512MB RAM (Option:8GB+1GB) Operate Frequency: GSM 850/900/1800/1900MHZ & WCDMA 900/2100MHZ or

    850/1900/2100 or 850/1700/1900850/1900/2100 or 850/1700/1900 Dual SIM :Dual SIM dual standby Display: 5.0 inch FWVGA IPS 480*854 Camera : Back 5.0MP +Front 2.0MPCamera : Back 5.0MP Front 2.0MP Extend T-Flash Card support

  • 3 Specification3. Specification Size: 142.9*72.6*9mm (L*W*H) Color: Black Keypad :NO Side Key:2 keys (volume key/ power key) Antenna: Internal RF&BT,WIF&GPS; External FM, ; Earphone:3.5mm jack Battery:2200mAh USB t Mi 5 i USB USB port: Micro 5pin USB Electroacoustic part:1 mic.,1 spk., 1 vib. 1 Receiver (option: Piezo)

  • Examination function.Examinationfunction1IMEI examination order Inputs the *#06# instruction to check the IMEI NO. inside mobile phone

    2Testing order Inputs the *983*0# to test all normal functions

    3Download cable Just use the usb cable to download sw

  • .Testing and Repair Tools.TestingandRepairTools CMU200 or 8960 DC POWER SUPPLYDC POWER SUPPLY Oscillograph Hot gun Electric iron Stroboscope

    Screwdriver(electromotion) Screwdriver(electromotion) UP-1024 super speed universal programmer Disassemble toolsDisassemble tools Multimeter

  • CMU200 or 8960 DC Power Supply OscillographCMU200 or 8960 DC Power Supply Oscillograph

    Hot gun Electric iron Stroboscope

  • Screwdriver(electromotion) UP-1024 super speed universal programmer

    MultimeterDisassemble tools Disassemble tools MultimeterDisassemble tools Disassemble tools

  • Glove Soldering tin Fabric Alcohol bottle

    Brush fixed clampBrush

  • .CircuitChipset/Instructions

    CPU:MT6582M (Four Cortex : 1.3Ghz)MCP:4GB ROM+512MB RAM(option:8GB 1GB )Power management: MT6323Power management: MT6323Multimedia:MT6627WLAN+GPS+BT+FM 4 in 1 IC

    /RF:3G/2G quad-band transceiver MT6166+Power Amplifier SKY77590+SAW +SMD Crystal

  • TOPGSM PA U401

    Battery connector XJ703

    Earphone connector

    USB connector XJ701

    Back camera connector XJ903

    CPU U501 MT6582

    P U601

    Front camera connector XJ908

    XJ711

    MCP U602

    Power manage U601 MT6323

  • BOT

    SIM 1 connector XJ707

    SIM 2

    TP connector XJ1006

    connector XJ708

    TF connector XJ706

    LCD connector XJ902XJ902

  • MT6323managementdiagramcircuit:

  • Charger circuit:Charger circuit:

  • SIM card circuitSIM card circuit

  • TF-Flash card circuitTF-Flash card circuit

  • MIC circuit

  • Earphone connector circuit

  • Speaker circuitSpeaker circuit

  • Battery connector

  • Camera connector circuit

  • LCD connector circuit

  • TP circuit

  • G-SENSOR circuit

  • MT6627 circuit(WLAN+GPS+BT+FM 4 in 1 IC)

  • Troubleshootingoftheproblem:Troubleshootingoftheproblem:1.Cannt download software repair guidance2 No power on repair guidance2. No power on repair guidance3. Display Problem (blank display ,white display) repair guidance4. No ring repair guidance5 Audio problem repair guidance5. Audio problem repair guidance6. Camera problem repair guidance7. TF card problem repair guidance8 SIM d bl i id8. SIM card problem repair guidance9. Cant charge repair guidance10. No vibration repair guidance11 TP bl i id11. TP problem repair guidance12. MT6627 (WIFI\GPS) repair guidance13. FM Can not search signal14 N i l14. No signal

  • Cannt download software repair guidance

    Cannt download

    YES

    Check the files to select from software package Re-download

    NO

    Y

    NO

    Check VBATVCHG voltage Solder or replace Power management MT6323

    NO

    Y

    NO

    Check USB connector if have short circuit or open

    circuitSolder or replace usb connector

    Y

    NOCheck clock frequency32.768kHz (700mV )or

    system clock 26MHz(600mV)

    Solder or replaceY

    NO

    Check CPU(MT6582) and circuits round Solder or replaceY

  • No power on repair guidance

    No power on repair guidance

    Y

    Check the power button,Re-download software

    NN

    Check if have any creepage,If VBATVCHG is short circuit,

    If have ESD was damageSolder or replace

    N

    Y

    N

    Check if have KEYON signal after press power

    key

    Solder or replace Power management MT6323Y

    yN

    Check clock frequency32.768kHz( 700mV)

    System clock 26MHz (600mV)Solder or replace

    Y

    NN

    Check CPU( MT6582)Or circuit round Solder or replace

    Y

  • Display Problem (blank display ,white display) repair guidance

    Display Problem (blank display ,white display)

    Y

    Check LCD is ok or not Replace LCD to test

    N

    Y

    N

    Check LCD Connector if have any short solder etc Solder or replace XJ902

    N

    Y

    N

    Check Backlight circuit U901 Solder or replace U901Y

    N

    check MT6582 Solder or replaceY

  • No ring repair guidance

    No ring or voice

    Y

    Check speaker if have assemble ok Repeat fixed

    N

    Y

    N

    Check speaker if have damage Replace to test

    N

    Y

    N

    Check speaker round circuit Solder or replace Y

    N

    Solder/replace

    YCheck power IC MT6323

    Check CPU MT6582 Solder or replace

    NY

  • receiver problem repair guidance

    Audio problem (Cannt got voice when making call)

    Y

    Check Receiver FPC if have connect ok Repeat fixed

    N

    Y

    N

    Check Receiver damage or not ReplaceN

    NN

    Check receiver round circuit Solder or replaceY

    Check CPU MT6582 Solder or replace

    N

    Y

  • Camera problem repair guidance

    Cannt take picture or mistiness

    Y

    Check camera if have damage Replace to test

    N

    Y

    N

    Check camera connector XJ903/XJ908 Solder or replaceY

    NN

    Check CPU MT6582 Solder or replaceY

  • TF card problem repair guidance

    TF card not be identify

    Y

    Check TF connector is damage or not Solder or replace XJ706

    N

    Y

    N

    Check data \clock\power to TF connector Solder or replaceY

    NN

    Check CPU MT6582 Solder or replaceY

  • SIM card problem repair guidance

    SIM card not be identify

    Check Sim connector if have damage Solder or replace XJ707/XJ708

    YY

    Check Sim connector if have damage Solder or replace XJ707/XJ708

    N

    Ch k SIM d i i if h l MT6323 S ld lY

    Check SIM card circuit,if have power supply MT6323 Solder or replace

    N

    Check and replace MT6582

  • Cant charge repair guidance

    Cant charge

    Y

    Check battery connector and USB connector Solder or replace

    N

    Y

    N

    Check charge circuit Solder or replaceY

    Solder or replaceY

    Check circuit: Power supply MT6323

    Solder or replaceCheck CPU MT6582

    NY

    p

  • No vibration repair guidance

    No vibration

    Y

    Check assembly are in good condition Solder or replace

    N

    Y

    N

    Check whether the motor cable ifdisconnection or not Solder or replace

    Y

    NN

    Check power supply MT6323 Solder or replaceY

  • TP problem repair guidance

    No TP function

    Y

    Check TP FPC if have connecting Repeat fixed

    N

    Y

    N

    Check TP if have damage ReplaceY

    NN

    Solder or replaceY

    Check connector circuit XJ1006

    Check CPU MT6582 Solder or replaceY

    N

  • MT6627 (WIFI\GPS) repair guidance

    MT6627 Chi i i WIFI\BT\FM i iMT6627 Chip inteqration WIFI\BT\FM circuit

    GPS/WIFI cant work

    Check BT and WIFI address Write the address

    YY

    N

    Check the antenna contacts are in good condition replaceY

    N

    Check chip(MT6627) Solder or replaceY

  • FM Can not search signal

    Y

    Check antenna connect circuit Solder

    N

    Y

    N

    Check earphone or earphone connector Solder or replaceY

    N

    Check MT6627 Solder or replaceY

  • 2.RF circuit

  • No signal

    Check whether the antenna connection is good replaceY

    Check RF PA Solder or replace

    NO TX

    Y

    N

    Check circuit round Solder or replaceY

    N

    Check Filter circuit,26M OSC circuit Solder or replaceY

    Solder or replace

    N

    Y

    Check RF transceiver MT6166 Solder or replace

    N

    Check CPU MT6582

  • Di bl.Disassembly1 Open the battery cover as below1.Open the battery cover as below

    Camera lens

    Battery cover

  • 2. Take out cover of bottom as below2. Take out cover of bottom as below

    Battery cover

  • 3. Take out 12 screws with Screwdriver as below

  • 4 S t f t d b l4. Separate front case and rear case as below:

    Rear caseVolume key

    Power key

  • 5 T k t M i PCBA f f t5. Take out Main PCBA from front case

    1) Remove the fixed 4PCS screws

  • 2)Disassembly components from main PCBA) y p

    Speaker

    Motor

    TP FPC

    Keypad FPC

    LCD FPC

    MicrophoneMicrophone

  • 3).Take out Main PCBA from front case

    Main PCBA

    Front case

  • 6. Remove those components(speaker, motor, microphone, keypad FPC) from main PCBA

    speaker

    motorKeypad FPC

    microphone

  • Remove front camera ,back camera from main PCBA

    Back camera Front camera

  • 7. Disassembly components distribution as below

    i

    Rear caseFront case

    receiver

    Main PCBA

    Touch panel

    Mic

    Battery cover Back camera

    Front camera Power key FPC

    motor

    speakerVolume keyPower key

  • 8. Disassemly TP&LCDDisassembly the mobile phone to front housing subassembly only (just have LCD/touch lens/front housing) then along the round(black area) on Touch lenshousing), then along the round(black area) on Touch lens to heat even about 20seconds with Hot Gun as below pic

  • 9.once finished to heat up by Gun. take the Guitar p yplectrum insert the gap between Touch lens and front housing (take care :the Guitar plectrum didnt be insert too deep ,or will hurt the LCD). then prize the touch lens along the round as below picg p

    1 2

    3 4

  • THE ENDTHE END