Advertisement
Quick Links
Advertisement
Related Manuals for Micromax A74 L1
Summary of Contents for Micromax A74 L1
- Page 1 A74 L1&L2 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 Product size：134*67*10.25 Platform：MTK6572，dual-core 1GHz Memory： 4GB+4Gb (Nand&sdram+RAM） System：Android 4.2 Frequency band: WCDMA：2100，GSM：900/1800MHz Battery： 1500mAh Travel charger charger: MICRO 5PIN USB cable: 3.5jack earphone： LCD&TP： 4.5 FWVGA, Capacitance TP Camera：0.3M and 5.0M CMOS Support：BT2.1，WIFI，FM。 Support：3D graphics accelerator，accelerator sensor, distance sensor, light feeling sensor。...
-
Page 5: Disassembly Guide
Disassembly guide 1. Tools list Tweezer /Cross screw driver/ Solder/Tommy bar/hot gun Tommy bar Tweezer Cross Screw driver Solder iron Hot gun... - Page 6 Disassembly guide 2. Battery caver disassembly ， as the Fig. 1 open the battery cover Battery cover Fig. 1...
- Page 7 Disassembly guide 3. Back caver disassembly ，as the Fig.2； 1） Unscrew 12 screws in back cover Fig. 2...
- Page 8 Disassembly guide ，as the Fig.3； 2） Disassemble back cover with Tommy bar Back cover Fig. 3...
- Page 9 Disassembly guide 4.Main board and front cover disassembly ，as the fig.4； 1） The main components of distribution Main PCBA LCD con. RF cable Battery con. Front CAM con. vibrator Back CAM. USB con. Sub PCBA Earphoe con. TP con. T card Main FPC SIM con.
- Page 10 Disassembly guide 2）remove two screws and open the LCD con.& TP con. ，and remove the volume key FPC & power key FPC as the fig.5； TPcon. LCDcon. 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 RF cable con. Main FPC con. Main board Fig.6...
- Page 12 Disassembly guide 5. Front and Back camera & light sensor disassembly remove the light sensor and camera，as the fig.7； Back cam. Light sensor&holder Light sensor con. Fig.7 Front...
- Page 13 Disassembly guide 7. Speaker & receiver disassembly remove the Speaker camera and receiver，as the FIG.9； receiver Fig.9...
- Page 14 Disassembly guide 8. RF cable and Main FPC disassembly Remove the RF cable and Main FPC ，as the fig.10 RF cable Main FPC Fig.10...
- Page 15 Disassembly guide 9. Sub PCBA disassembly remove the sub PCBA from the ，as the fig.11； vibrator Sub PCBA Fig.11...
- Page 16 Disassembly guide 10.MIC disassembly Remove the MIC，as the fig.12； MIC con. Fig.12...
-
Page 17: Structure Parts Diagram
Structure parts diagram Sensor receiver holder 0.3M camera Light Main sub PCBA 5M camera sensor PCBA RF cable Main FPC Back cover Battery cover 3in1 module (LCD, TP & front cover... - Page 18 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; e.
-
Page 19: Repairing Guide
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 ok; c. Checking the camera connector if is ok as below picture, otherwise to re-solder or change a new one;... - Page 20 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; e.
- Page 21 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 22 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 23 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. MIC con.
- Page 24 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. earphone...
- Page 25 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.; Power On...
- Page 26 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. USB Connector...
- Page 27 Repairing guide 10.No SIM card and No memory card a. Checking the connector of T –card and SIM card; Change the connector of T –card and SIM card; T-card connector Connector...
- Page 28 Repairing guide 11.Signal a. Checking RF line if that is broken; b. Checking RF line assemble if is ok; RF connector Sub-board RF connector...
- Page 29 Q&A...