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Micromax A94 Service Manual
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Micromax A94 Service Manual

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A94 service manual

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Summary of Contents for Micromax A94

  • Page 1 A94 service manual...
  • Page 2 content •  1、 Product introduce..………..p3-p4 •  2、 Disassembly guide ……….p5-p17 •  3、Structure parts diagram…..p18 •  4、 Repairing guide …………...p19-p29...

  • Page 3: Product Introduce

    Product introduce...
  • Page 4 Product introduce • Model ：A94 • Product size：137*66.6*9.6mm • Platform：BCM23550，quad-core 1.2GHz • Memory： 4GB+4Gb (e-MMC&LPDDR2） • System：Android 4.2 • Frequency band: WCDMA：2100，GSM：900/1800MHz • Battery： 1800mAh • charger: Travel charger • USB cable: MICRO 5PIN • earphone： 3.5 jack • LCD&TP： 4.5 FWVGA, Capacitance TP， multi-point touch •...

  • Page 5: Disassembly Guide

    Disassembly guide • 1. Tools list Tweezer /Cross screw driver/Solder/Tommy bar/hot gun...
  • Page 6 Disassembly guide • 2. Battery caver disassembly • open the battery cover，as the Fig. 1 Battery cover Fig. 1...
  • Page 7 Disassembly guide • 3. Back caver disassembly • 1） Unscrew 11 screws in back cover ，as the Fig.2； Fig. 2...
  • Page 8 Disassembly guide • 2） Disassemble back cover with Tommy bar ，as the Fig.3； Back cover Fig.3...
  • Page 9 Disassembly guide • 4.Main board and front cover disassembly • 1）The main components of distribution，as the Fig.4； Earphone con RF cable T card con SIM1 card con ANT clip TP con Main PCB 8M camera USB con BAT con 5M camera LCD con vibrator SIM2 card con...
  • Page 10 Disassembly guide • 2）remove 1 screws and open the LCD con.& TP con. ，and remove the volume key FPC & power key FPC as the Fig.5； TP con LCD con Fig.5...
  • Page 11 Disassembly guide • 3）open the main board and remove the RF cable con. And main FPC con..as the Fig.6 accelerator sensor RF part AP part Main FPC con Fig.6...
  • Page 12 Disassembly guide • 5. 5M front and 5M rear camera & light sensor disassembly remove the light sensor and 5M front camera，as the Fig.7； 5M front camera 5M rear camera light & distance sensor Fig.7...
  • Page 13 Disassembly guide • 6.Power key FPC & volume key FPC disassembly remove the power key FPC and volume key FPC with the iron，as the Fig.8； Volume key FPC Power key FPC Fig.8...
  • Page 14 Disassembly guide • 7. Speaker & receiver disassembly remove the Speaker camera and receiver，as the Fig.9； Receiver Speaker Fig.9...
  • Page 15 Disassembly guide • 8. RF cable and Main FPC disassembly Remove the RF cable and Main FPC ，as the Fig.10 Fig.10...
  • Page 16 Disassembly guide • 9. Sub PCBA disassembly remove the sub PCBA from the ，as the Fig.11； Fig.11...
  • Page 17 Disassembly guide • 10.MIC disassembly Remove the MIC，as the Fig.12； Fig.12...

  • Page 18: Structure Parts Diagram

    Structure parts diagram...

  • Page 19: Repairing Guide

    Repairing guide 1. LCD a. Check if the SW is correct, otherwise to upgrade the SW; b. Check the LCD if is ok, otherwise change a new LCD; c. If that the LCD loose, re-assemble the LCD and test; d. Checking the LCD connector if is ok, otherwise re-solder it or change a new one;...
  • Page 20 Repairing guide 2. Camera a. Checking the camera is assemble ok, re-assemble the camera and test; b. Using the good camera to do cross test, it can check if the camera is c. Checking the camera connector if is ok as below picture, otherwise to re-solder or change a new one;...
  • Page 21 Repairing guide 3. TP a. Checking the SW and upgrade the SW; b. Checking the FPC of TP and re-assemble it; c. Using the good TP to do cross test; d. Checking the TP connector, otherwise re-solder or change a new one;...
  • Page 22 Repairing guide 4.Ring a. Checking the shrapnel of speaker if is ok; b. Checking the resistance of speaker if is ok, otherwise to change a new one; c. Checking the FPC if is ok; d. Checking SPK-FPC if connector with sub-board is ok.
  • Page 23 Repairing guide 5.receiver a. Checking the shrapnel of receiver if is ok; b. Checking the resistance of receiver if is ok, otherwise to change a new one; c. Checking the connector point on the main board if is ok, as below picture;...
  • Page 24 Repairing guide 6.MIC and Vibrator a. Checking the MIC and Vibrator is cold soldering, re-solder it; b. Change the MIC and Vibrator; c. Checking the circuit of MIC and Vibrator; d. Checking the FPC if connect ok. vibrator...
  • Page 25 Repairing guide 7. Earphone a. Checking the shrapnel of earphone if is ok; b. Checking the connector point on the main board if is ok, as below picture; c. Change earphone connector; c. Checking the circuit of earphone.
  • Page 26 Repairing guide 8.No Power On a. Checking the voltage of battery if is 3.8-4.2V and connect ok; b. Upgrade the SW; b. Checking the power on key and circuit around it.;...
  • Page 27 Repairing guide 9.No charging a. Checking the voltage of battery if is over 3.4V; b. Checking the charger and USB cable if is ok; c. Checking the USB connector and circuit if is ok.
  • Page 28 Repairing guide 10.No SIM card and No memory card a. Checking the connector of T –card and SIM card; b. Change the connector of T –card and SIM card; T card con SIM1 card con SIM2 card con...
  • Page 29 Repairing guide 11.Signal a. Checking RF line if that is broken; b. Checking RF line assemble if is ok; RF con RF con...
  • Page 30 Q&A...