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A069 L2 Service Manual

CHAPTER 4.SYSTEM BLOCK DIAGRAM

4.1、PCBA A-Side

J1003 Earphone

connector. bug by

damaged.

Earphone no sound

J1203 I/O Connector

bug by damaged No charge

in, Cannot upgrade Software

U301 Flash Bug by

damaged

Cannot power on, cannot

upgrade software.

U101 CPU Bug by

damaged

Cannot power on. No RF

signal. No display or

display abnormality

U401 Power IC Buy by

damaged,Cannot power

on.

No charge in.

Speaker no sound.

U701

BT/WIFI/FM/GPS IC.

Buy by damaged.

BT/WIFI/FM/GPS Not

work

J1205 Battery connector

Bug by damaged.

Not power on.

Not charge in

U501 RF IC

Bug by damaged.

No signal

Can’t power on.

U605 GSM PA

Bug by damaged.

No signal. Large

current

Содержание A069

Страница 1: ...d out at an anti static workstation and that an anti static wrist strap is worn Use only approved components as specified in the parts list Ensure all components modules screws and insulators are correctly re fitted after servicing and alignment Ensure all cables and wires are repositioned correctly Electrostatic discharge can easily damage the sensitive components of electronic products Therefore...

Страница 2: ...era Back camera 5 FF Mega Front camera 0 3 Mega Battery 1850 MAH BT 4 0 USB Micro USB 2 0 Main Function Dual Card Full Touch Smartphone Android 4 2 CPU MT 6572 1 3GHz Dual core 5 FWVGA480 854 Camera Back camera 5 FF Mega Front camera 0 3 Mega WIFI 802 11n 802 11g 802 11b 4GB 512MB Dual SIM ...

Страница 3: ... TOOLS Voltage regulator Multimeter Iron Hot air gun Solder wire soldering paste Computer and software download cable Metal tweezers Screw driver etc Pick Driver Tweezers Wrist groun ding strap Antistatic gloves SW upDownlo ad cable ...

Страница 4: ...nnot power on cannot upgrade software U101 CPU Bug by damaged Cannot power on No RF signal No display or display abnormality U401 Power IC Buy by damaged Cannot power on No charge in Speaker no sound U701 BT WIFI FM GPS IC Buy by damaged BT WIFI FM GPS Not work J1205 Battery connector Bug by damaged Not power on Not charge in U501 RF IC Bug by damaged No signal Can t power on U605 GSM PA Bug by da...

Страница 5: ... damaged Can t Access T Flash Card J901 Camera connector Bug by damaged Can t take photos J1201 J1202 SIM connector Bug by damaged Cannot the SIM card J802 TP Connector Bug by damaged TP not work J801 LCD Connector Bug by damaged LCD No display or display abnormality ...

Страница 6: ...A069 L2 Service Manual 4 2 Side A layout ...

Страница 7: ...A069 L2 Service Manual Side B layout ...

Страница 8: ...ING INSTABILITY Upgrade the software is normal Cannot power on Replace the structural member Check the battery is normal Check the battery connector in normal Replace the PCBA is normal Replace the battery NO NO yes NO Replace the battery connector yes yes Replace the PCBA NO ...

Страница 9: ...efect issue Clean and reinstall the keypad or replace the touch panel Check battery connector and battery touch point if is dropped or dirty Check the keypad if stuck or touch panel do not work to make the phone dead Replace the PCBA Clean or replace the battery or battery connector YES YES No No No ...

Страница 10: ...rmality after power on Check LCD connector is OK or not Resolder the LCD connector can settle the defect issue Replace the PCBA Check LCD if damage or liquid flow out Change LCD Yes Clean or reweld the LCD connector Yes Change the LCD can settle the defect issue No Upgrade software No ...

Страница 11: ...eplace the PCBA Insert SIM Clean or replace SIM connector Clean or reweld the SIM connector Check SIM connector is OK or not OK Check if all the SIM pins are clean NO Check FPC on SIM connector is OK or not NO Replace FPC NO Upgrade software can settle the defect issue NO ...

Страница 12: ...a and antenna connector to see if there s any distortion Replace the defective components Check and replace RF connector to see if there s any signal Replace RF coaxial line Replace the PCBA YES YES Check and replace RF coaxial line to see if there s any signal YES Replace RF connector NO NO ...

Страница 13: ...AKER Set the phone as normal mode Replace the PCBA No sound or noise Remove the speaker and measure with multimeter to see if there s any sound Replace speaker The phone is in Silent mode Check and replace FPC is ok or not Replace FPC Yes NO yes ...

Страница 14: ... VOICE Measure the signal with oscillograph under calling mode Receiver is low Check if receiver connector is damaged Resolder or clean the receiver connector Check if the receiver is broken or damaged Yes NO NO Replace the receiver Replace the PCBA ...

Страница 15: ...No Low sound from MIC NO Yes YES Check if there s MIC cover Install the MIC cover Press power on and side button to test mode and activate echo loop Replace the MIC Replace FPC to check if the problem is solved Replace the FPC Replace the PCBA YES ...

Страница 16: ...ge good one Upgrade the software is normal No charge DOES NOT CHARGE NO CHARGE IN YES NO NO NO NO Change battery Check if I O connector works normal Check and replace FPC is normal YES Replace the PCBA Replace the charger or cable without Re solder or replace the I O connector Replace the FPC ...

Страница 17: ... t read T Flash card NO Check if T Flash slot appearance was ok Replaced the T Flash slot Check if T Flash FPC is normal Re solder or replace FPC NO Check if the T Flash connector is normal Re solder or replace the T Flash connector Replace the PCBA NO ...

Страница 18: ...T FM GPS DEFECT REPAIR FLOW CHART YES NO WIFI or BT or FM or GPS can t open Can t work normal Software update and check the function is OK or not Upgrade Software Check the WIFI or GPS antenna is normal Check WIFI or GPS RF connector is normal Replace the RF connector Replace the PCBA NO Replace the antenna ...

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