Micromax A94 Service Manual Download Page 7 | Manualshive

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Disassembly guide
• 3. Back caver disassembly

•

1

）

Unscrew 11 screws in back cover

，

as the Fig.2

；

Fig. 2

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Summary of Contents for 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...

Page 4: ...roid 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 Camera 5 0M front and...

Page 5: ...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 Fig 1 Battery cover...

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 Fig 3 Back cover SPK...

Page 9: ...d and front cover disassembly 1 The main components of distribution as the Fig 4 Fig 4 Main PCB Earphone con TP con 8M camera USB con 5M camera LCD con SIM2 card con SIM1 card con T card con BAT con R...

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 Fig 5 LCD con TP con...

Page 11: ...Disassembly guide 3 open the main board and remove the RF cable con And main FPC con as the Fig 6 Fig 6 RF part AP part accelerator sensor Main FPC con...

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 Fig 7 5M rear camera 5M front camera light distance sensor...

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 Fig 8 Volume key FPC Power key FPC...

Page 14: ...Disassembly guide 7 Speaker receiver disassembly remove the Speaker camera and receiver as the Fig 9 Fig 9 Speaker Receiver...

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...

Page 19: ...wise 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...

Page 20: ...k re assemble the camera and test b Using the good camera to do cross test it can check if the camera is ok c Checking the camera connector if is ok as below picture otherwise to re solder or change a...

Page 21: ...king 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 e Checking the circu...

Page 22: ...ide 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...

Page 23: ...cking 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 d Checki...

Page 24: ...g 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 vibr...

Page 25: ...ring 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 earp...

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 SIM2 card con SIM1 card con T 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: ...End Q A...

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