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Micromax A310 Service Manual

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A310
1. Technical Specifications :
Particular
Key Matrix For Flashing
Chipset
Android Version
Frequency
Network Mode
ROM
RAM
Internal SD Card memory
Expandable Memory
Factory mode code
2. CAUTIONS
___________________________________________________________________________________________________________________________________________
Remarks
NA
MT6592
Android 4.4
GSM：900/1800/1900MHz UMTS：900/2100MHz
Dual SIM: WCDMA+GSM
8 GB
2 GB
5GB User available
32GB
*#9527*#
L3 Service Manual

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Summary of Contents for Micromax A310

  • Page 1 A310 L3 Service Manual 1. Technical Specifications : Particular Remarks Key Matrix For Flashing Chipset MT6592 Android Version Android 4.4 Frequency GSM：900/1800/1900MHz UMTS：900/2100MHz Network Mode Dual SIM: WCDMA+GSM 8 GB 2 GB Internal SD Card memory 5GB User available Expandable Memory...
  • Page 2 A310 L3 Service Manual Flashing & Servicing must be undertaken by qualified personnel only. Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn. III. Use only approved Tools & components as specified in the parts list.
  • Page 3 A310 L3 Service Manual Basic Structure of the Mobile Phone 1. PCBA Pictures of A310 Mainboard ___________________________________________________________________________________________________________________________________________...
  • Page 4 A310 L3 Service Manual ___________________________________________________________________________________________________________________________________________...
  • Page 5 A310 L3 Service Manual ___________________________________________________________________________________________________________________________________________...
  • Page 6 A310 L3 Service Manual 3. L3 Level trouble shooting 1) Doesn’t Power On Solution:  There is no current when the Power Key is pressed; check SW2001 and J2002 to see if there is false soldering, pseudo soldering or damage, if yes, Carry out resoldering or replacement;...
  • Page 7 A310 L3 Service Manual Power Key Battery Connector ___________________________________________________________________________________________________________________________________________...
  • Page 8 A310 L3 Service Manual 2) Restart / Hang Refer same to Power failure issue. 3) LCD Issues “Black screen and no display of LCD” Solution:  Exchange the front shell to judge if the LCD itself is abnormal , if yes, Replace the LCD;...
  • Page 9 A310 L3 Service Manual Black screen, white screen and blurred screen of LCD when the backlight is OK. Solution:  Exchange the front shell to judge if the LCD itself is abnormal, if yes, Replace the LCD;  Check if the LCD connector is damaged , if yes, Replace the LCD connector J1802;...
  • Page 10 A310 L3 Service Manual LCD Circuit ___________________________________________________________________________________________________________________________________________...

  • Page 11: Touchpad Failure

    A310 L3 Service Manual 4) Touchpad Failure Solution:  Exchange the front shell to judge if the TW itself is abnormal, if yes, Replace the front shell (with LCD)  Check if the TW connector is damaged, if yes, Replace the connector J1801 ...
  • Page 12 A310 L3 Service Manual 5) Proximity Sensor “Test failure of the light/proximity sensor” Solution:  First calibrate the sensor to see if it is OK and if the I2C pull-up resistors of the acceleration sensor are OK, if no, Carry out repair soldering of resistors R217 and R218;...
  • Page 13 A310 L3 Service Manual 6) Accelerometer “Failure to realize automatic screen rotation during image viewing” Solution:  Check if the IIC pull-up resistors R217 and R218 of the acceleration sensor have pseudo soldering, if yes, Carry out repair soldering of resistors R217 and R218;...
  • Page 14 A310 L3 Service Manual 7) Keypad Solution: Refer same with Power-on failure 8) Charging Failures “No indication during charging” Solution:  Replace the main FPC to check if the FPC is abnormal, if yes, Directly replace the main FPC;  Check if FB3000, R3002, C3001, C3002, D3001, LB3000, D3029 and D3030 have damage or pseudo soldering, if yes, Carry out repair soldering or replacement of FB3000, R3002, C3001, C3002, D3001, LB3000, D3029 or D3030;...
  • Page 15 A310 L3 Service Manual There is charging indication, but no charging current. Solution:  Check if the surface of the charging IC U602 has obvious damage, if yes, The charging IC is damaged, replace U602;  Replace PL605. Charging Management IC...
  • Page 16 A310 L3 Service Manual Main Camera/ Front Camera Photographing and Shooting Failures “ ” Solution:  Check if the camera is properly installed, if no, Reinstall it;  Exchange the camera to see if the problem is solved, if yes, The problem is caused by the camera itself;...
  • Page 17 A310 L3 Service Manual Rear-facing Camera Circuit Front-facing Camera Circuit ___________________________________________________________________________________________________________________________________________...
  • Page 18 A310 L3 Service Manual 10) Flash Light “Malfunction of Torch or Flashlight” Solution:  Check if the camera can be turned on, if no, The problem is caused by the rear-facing camera; see the analysis of camera failures;  Check if the light can turn on when battery voltage is supplied to its both ends, if yes, Replace the light U601;...

  • Page 19: Motor Circuit

    A310 L3 Service Manual 11) Vibrator Failures Solution:  Check if L1200 and MOTOR3000 are damaged or have pseudo soldering, if yes, Carry out replacement or repair soldering;  Replace the subboard. Motor Circuit ___________________________________________________________________________________________________________________________________________...
  • Page 20 A310 L3 Service Manual 12) Sim“ Failure to identify SIM card” Solution:  Check if the SIM card sockets J2301 and J2302 are obviously damaged, if yes, Replace the SIM card socket;  Check if the pins of the SIM card sockets J2301 and J2302 have pseudo soldering, if yes, Carry out repair soldering;...
  • Page 21 A310 L3 Service Manual 13) Network /GPS / WI-FI “Weak signals of GPS and WIFI antennas” Solution:  First, it is needed to check the matching parts of the GPS and WIFI antennas to see if there is pseudo soldering or missing part.
  • Page 22 A310 L3 Service Manual ③ Check if the RF cable between RF connection sockets J1200 and J3011 is normal. Method: Perform cross-over experiment with a good device or directly replace it with a cable of good performance; if the cable is confirmed as damaged, just replace it.
  • Page 23 A310 L3 Service Manual J200 RF Connector and J1202 RF Test Socket J2801 RF Connector ___________________________________________________________________________________________________________________________________________...
  • Page 24 A310 L3 Service Manual Abnormality of conduction transmission Solution:  Confirm whether calibration is abnormal, if no, Upgrade the software;  Confirm whether the RF test cable is in good condition and whether it is firmly connected, if no, Renew the RF test cable and connect it properly;...
  • Page 25 A310 L3 Service Manual Conduction Transmission Circuit ___________________________________________________________________________________________________________________________________________...
  • Page 26 A310 L3 Service Manual Abnormality of conduction reception Solution:  Confirm whether calibration is abnormal, if no, Upgrade the software;  Confirm whether the RF test cable is in good condition and whether it is firmly connected, if no, Renew the RF test cable and connect it properly;...
  • Page 27 A310 L3 Service Manual Conduction Reception Circuit Notes: There are many causes of abnormality of conduction transmission. The basic causes include: ① damage of component material in the RF circuit, which can be solved by replacing the material; ② pseudo soldering of components, which can be solved by repair soldering;...
  • Page 28 A310 L3 Service Manual BT/WIFI/FM Transceiver Bluetooth / FM / Radio - Please refer same with Wi-Fi Heating Issues - Please refer same with Power-On failure. ___________________________________________________________________________________________________________________________________________...
  • Page 29 A310 L3 Service Manual Phone“There is no sound from the earphone when an audio file is played” Solution:  Visually inspect the earphone jack to see if there is any abnormality, if yes, Replace the earphone jack J1701;  Check if FB1703, FB1704, R1715 and R1716 have pseudo soldering , if yes, Carry out repair soldering;...
  • Page 30 A310 L3 Service Manual Abnormality of the earphone found through inspection Solution:  Visually inspect the earphone jack to see if it is abnormal, if yes, Replace the earphone jack J1701  Check if FB1701, FB1703, R1702 and R1711 have pseudo soldering, if yes, Carry out repair soldering ...
  • Page 31 A310 L3 Service Manual Earphone Connector Circuit ___________________________________________________________________________________________________________________________________________...
  • Page 32 A310 L3 Service Manual Outgoing Audio / MIC“There is no voice transmitted by the local MIC via WCDMA/GSM network” Solution:  Exchange the main FPC to judge if the FPC itself is abnormal, if yes, Replace the main FPC;  Exchange the subboard to judge if the subboard itself is abnormal , if yes: ...
  • Page 33 A310 L3 Service Manual There is no voice transmitted by the earphone MIC via WCDMA/GSM network Solution:  Visually inspect the earphone jack to see if it is abnormal, if yes, Replace the earphone jack J1701;  Check if FB1701, R1709, R1710, R1711, R1712, R1713, C1712, C1715 and C1723 have pseudo soldering, if yes, Carry out repair soldering;...

  • Page 34: Gsm Network

    A310 L3 Service Manual There is no voice received from the speaker via WCDMA /GSM network Solution:  Exchange the back shell to judge if the speaker itself is abnormal, if yes, Replace the speaker;  Check if the speaker pad to ground impedance is lower than grade K, if yes, Replace R3079, R3080, C3043, C3040, C3041, D3012 or D3013 on the subboard;...
  • Page 35 A310 L3 Service Manual There is no voice received from the earphone via WCDMA /GSM network Solution:  Visually inspect the earphone jack to see if it is abnormal, if yes, Replace the earphone jack J1701;  Check if FB1703, FB1704, R1715 and R1716 have pseudo soldering, if yes, Carry out repair soldering;...
  • Page 36 A310 L3 Service Manual Incoming Audio / Earpiece “There is no voice received from the receiver via WCDMA/GSM network” Solution:  Exchange the front shell to judge if the receiver itself is abnormal, if yes, Replace the receiver;  Check if the receiver pad to ground impedance is lower than grade K, if yes, Replace C1702, C1703, C1701, D1701 and D1702 on the mainboard;...
  • Page 37 A310 L3 Service Manual Speaker “There is no sound from the speaker when an audio file is played” Solution:  Exchange the back shell to judge if the speaker itself is abnormal, if yes, Replace the speaker;  Check if the speaker pad to ground impedance is lower than grade K, if yes, Replace R3079, R3080, C3043, C3040, C3041, D3012 or D3013 on the subboard;...
  • Page 38 A310 L3 Service Manual There is no voice received from the speaker via WCDMA/GSM network. Solution:  Exchange the back shell to judge if the speaker itself is abnormal, if yes, Replace the speaker;  Check if the speaker pad to ground impedance is lower than grade K, if yes, Replace R3079, R3080, C3043, C3040, C3041, D3012 or D3013 on the subboard;...
  • Page 39 A310 L3 Service Manual Memory Card“Failure to identify TF card” Solution:  1, Check if the TF card socket J2304 is obviously damaged, if yes, Replace the TF card socket;  2, Check if the ground impedance of each pin of the TF card socket (except the ground pin) is low (lower than grade K) , if yes, Replace the varistor of the corresponding pin;...
  • Page 40 A310 L3 Service Manual 22) The keypad backlight does not turn on when touching the screen Solution:  Check if the backlight can turn on when 2.5-2.7V voltage is applied to the backlight monomers D3000, D3302 and D3003. If not, the monomers are damaged, if yes, Pseudo soldering or damage of the keypad backlight;...
  • Page 41 A310 L3 Service Manual 23) Problem of the charging and SMS signal indicator. Solution:  Check if LED2102 has damage or pseudo soldering, if yes, Carry out repair soldering or replacement of LED2102. Three-color Indicator Circuit Thanks For any Query or suggestion, Please write to tech.help@micromaxinfo.com...