Micromax A290 Service Manual
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Micromax A290 Service Manual

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A290

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
Good Earpiece volume
Good Loudspeaker volume
Good Mic volume
Good Vibrator volume
Remarks
NA
MT6592M
Android 4.4.2
1.4GHz
900MHz/1800MHz/1900MHz/850MHz
WCDMA 900MHZ/2100 MHz
8G
1G
5.64G (share with data memory)
32G
Press vol+/ Vol-/ power key at the same time
32Ω ± 15%
8Ω ± 5%
2.2kΩ ± 5%
30Ω ± 5%
L2 Service Manual

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Summary of Contents for Micromax A290

  • Page 1: Technical Specifications

    A290 L2 Service Manual 1. Technical Specifications Particular Remarks Key Matrix For Flashing Chipset MT6592M Android Version Android 4.4.2 Frequency 1.4GHz 900MHz/1800MHz/1900MHz/850MHz Network Mode WCDMA 900MHZ/2100 MHz Internal SD Card memory 5.64G (share with data memory) Expandable Memory Factory mode code...

  • Page 2: Main Components

    A290 L2 Service Manual 2： CAUTIONS 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 A290 L2 Service Manual 1. Does not power on S.NO Possible Cause Validation steps Action NO power on Power on key is fail Change keys Battery capacity Charging the tablet Battery capacity level is too low Sw issue Flash the handset with latest SW...
  • Page 4 A290 L2 Service Manual 2. Display issue/No display S.NO Possible Cause Validation steps Action Sw issue Flash the handset with latest SW No display LCD fail Change LCD PCBA fail Change PCBA Colored screen LCD fail Change LCD LCD fail...

  • Page 5: Touch Panel

    A290 L2 Service Manual 3. Touch panel S.NO Possible Cause Validation steps Action SW Issue Flash the handset with latest SW TP issue Charge TP TP not working TP connection issue Assemble TP again PCBA issue Refer to L3 repair...

  • Page 6: Proximity Sensor

    A290 L2 Service Manual 4. Proximity Sensor S.NO Possible Cause Validation steps Action SW Issue Flash the handset with latest SW Sensor holder is not Proximity sensor fail Re-assemble the sensor holder assembled well PCBA issue Change PCBA Sensor...
  • Page 7 A290 L2 Service Manual 5. G-sensor S.NO Possible Cause Validation steps Action SW Issue Flash the handset with latest SW G-sensor is not working Set problem Reset mobile PCBA issue Change PCBA 6. Keys S.NO Possible Cause Validation steps Action...
  • Page 8 A290 L2 Service Manual Charging S.NO Possible Cause Validation steps Action Cannot charge into Adapter is fail Change adapter SW Issue Flash the handset with latest SW Have charging icon, but PCBA fail Change PCBA not charged Battery fail Change battery...
  • Page 9 A290 L2 Service Manual S.NO Possible Cause Validation steps Action USB cable is fail Change USB cable Cannot connect to PC Main FPC fail Change Main FPC having I/O connector PCBA fail Change PCBA connector...

  • Page 10: Front Camera

    A290 L2 Service Manual Front Camera S.NO Possible Cause Validation steps Action Camera is fail Change camera Colored screen when open front camera PCBA fail Change PCBA Sw issue Flash the handset with latest SW Cannot turn on front Camera fail...

  • Page 11: Playing Video

    A290 L2 Service Manual 11. Playing Video S.NO Possible Cause Validation steps Action Sw issue Flash the handset with latest SW Hang often CPU poor soldering Refer L3 Repair DDR poor soldering Refer L3 Repair...
  • Page 12 A290 L2 Service Manual 12. Vibrator S.NO Possible Cause Validation steps Action Vibrate assemble issue Re assemble Vibrating is not properly Vibrate issue Change it Soldering issue Re soldering it NO vibrate Vibrate issue Change it PCBA issue Refer to L3 service...
  • Page 13 A290 L2 Service Manual 14. RF Network S.NO Possible Cause Validation steps Action RF antenna is fail Change RF antenna RF Network cannot SIM socket is fail Change SIM socket searchable PCBA fail Change PCBA Antenna RF PA connector 15. Bluetooth / FM S.NO...
  • Page 14 A290 L2 Service Manual 16. Receiver S.NO Possible Cause Validation steps Action Dust with receiver Clean it Noise/crack Receiver issue Change it Connection issue Assemble it Noise/volume low Receiver issue Change it 17. Earphone S.NO Possible Cause Validation steps Action...
  • Page 15 A290 L2 Service Manual S.NO Possible Cause Validation steps Action Some dust with mic Clean it Noise with uplink side MIC issue Change Main FPC PCBA issue Refer to L3 repair soldering issue Change Main FPC Volume low PCBA issue...
  • Page 16 A290 L2 Service Manual Speaker S.NO Possible Cause Validation steps Action Speaker with dust Change speaker Noise/crack Speaker foam issue Change speaker Speaker issue Change speaker Assemble issue Assemble again No volume Speaker issue Change it Audio PA issue Refer to L3 repair...
  • Page 17 A290 L2 Service Manual Battery S.NO Possible Cause Validation steps Action Battery issue Change battery Show charging but it is not charged Charging connector issue Change PCBA No charging Charging IC issue Change PCBA Battery issue Change battery Cannot charge fully...

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