Micromax A092 Building instructions

A092 L2 Service Manual

A092 L2 Service Manual
Product introduce
Model ：A092
Product size：125.5*65*11.5mm
Platform：Qualcomm MSM8212，Quad 1.2GHz
Memory：4GB+512MB (Nand&sdram+RAM）
System：Android 4.3
Frequency band: Dual-SIM WCDMA 900/2100MHz，GSM 900/1800 MHZ
Battery：1500mAh
Charger: Travel charger
USB cable: MICRO 5PIN
Earphone：3.5jack
LCD&TP：4.0WVGA, resolution: 800*480，Capacitance TP
Camera：5.0M+0.3M FF CMOS
Support：FM,GPS，BT4.0，WIFI
Support：Distance sensor, light feeling sensor

A092 L2 Service Manual
1. Tools list
I. Tweezer Cross
II. Screw driver
III. Solder
IV. Tommy bar
V. Hot gun

A092 L2 Service Manual
2. Battery caver disassembly
Open the battery cover，as the Fig. 1

A092 L2 Service Manual
3. Back caver disassembly
Unscrew 7 screws in back cover，as the Fig.2

A092 L2 Service Manual
4. Disassemble back cover with Tommy bar，as the Fig.3

A092 L2 Service Manual
5. Main board and front cover disassembly
The main components of distribution，as the fig.4

A092 L2 Service Manual
6. Remove four screws and open the LCD con. & TP con. & Speaker &
Vibrator, as the fig.5

A092 L2 Service Manual
7. Take out the main board，as the FIG.6

A092 L2 Service Manual
8. Remove the Back Camera and Front camera，as the FIG.7

A092 L2 Service Manual
9. Receiver and Light sensor rubber sleeve disassembly, as the fig.8

A092 L2 Service Manual
10. Exploded view

A092 L2 Service Manual
L1 & L2 Repairing guide
1. LCD
Check if the SW is correct, otherwise to upgrade the SW;
Check the LCD if is ok, otherwise change a new LCD;
If that the LCD loose, re-assemble the LCD and test;
Checking the LCD connector if is ok, otherwise re-solder it or change a new
one;
Checking the circuit around the LCD connector.

A092 L2 Service Manual
2. Camera
Checking the camera is assemble ok, re-assemble the camera and test;
Using the good camera to do cross test, it can check if the camera is ok;
Checking the camera connector if is ok as below picture, otherwise to
re-solder or change a new one;
Checking the circuit around the camera connector.

A092 L2 Service Manual
3. Touch Pannel
Checking the SW and upgrade the SW;
Checking the FPC of TP and re-assemble it;
Using the good TP to do cross test;
Checking the TP connector, otherwise re-solder or change a new one;
Checking the circuit around the TP connector.

A092 L2 Service Manual
4. Ringer
Checking the shrapnel of speaker if is ok;
Checking the resistance of speaker if is ok, otherwise to change a new one;
Checking the FPC if is ok;
Checking SPK-FPC if connector with sub-board is ok.

A092 L2 Service Manual
5. Receiver
Checking the shrapnel of receiver if is ok;
Checking the resistance of receiver if is ok, otherwise to change a new one;
Checking the connector point on the main board if is ok, as below picture;
Checking the receiver circuit if is ok.

A092 L2 Service Manual
6. MIC and Vibrator
Checking the MIC and Vibrator is cold soldering, re-solder it;
Change the MIC and Vibrator;
Checking the circuit of MIC and Vibrator;
Checking the FPC if connect ok.

A092 L2 Service Manual
7. Earphone
Checking the shrapnel of earphone if is ok;
Checking the connector point on the main board if is ok, as below picture;
Change earphone connector;
Checking the circuit of earphone.

A092 L2 Service Manual
8. No Power On / Dead
Checking the voltage of battery if is 3.8-4.2V and connect ok;
Upgrade the SW;
Checking the power on key and circuit around it.