Micromax A310 User manual

A310 L2 Service Manual

1. Technical Specifications :

Particular

Remarks

Key Matrix For Flashing

Chipset

MT6592

Android Version

Android 4.4

Frequency

GSM：900/1800/1900MHz UMTS：900/2100MHz

Network Mode

Dual SIM: WCDMA+GSM

ROM

8 GB

RAM

2 GB

Internal SD Card memory

No less than 5GB

Expandable Memory

32GB

Factory mode code

*#9527*#

A310 L2 Service Manual

2. CAUTIONS

I. Flashing & Servicing must be undertaken by qualified personnel only.

II. 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.

IV. Ensure all components, modules, screws, and insulators are correctly re-fitted after servicing and

alignment

V. Ensure all cables and wires are repositioned correctly if Handset disassembled

VI. Electrostatic discharge can easily damage the sensitive components of electronic products.

Therefore, Service Centre must adhere the precautions which mentioned above.

3. L2 Level trouble shooting

1) Doesn’t Power On

NO.

Description

Reason

Solution

Doesn’t Power On

Side Key is badly soldered

Re-solder side key.

Side Key is broken

Change a new Side Key

Check battery Connector

Clean & Change If required

MB is broken

Refer to L3 service manual

Check weather Side Key is broken

A310 L2 Service Manual

2) Restart / Hang

NO.

Description

Reason

Solution

Restart / Hang

Battery malfunction

Replace battery & check

Software corrupt

Update Software

Check battery Connector

Clean & Change If required

MB issue

Refer to L3 service manual

Replace battery

A310 L2 Service Manual

3) LCD Issue

Description of Fault

Reason

Solution

Black screen and no

display of LCD

Problem of the LCD

Exchange the front shell

module to judge if the LCD is

Damage of the LCD connector

Replace the LCD connector

Soldering abnormality or damage of

the diode D1803 in the backlight

circuit

Refer to the service guide L3

Soldering abnormality or damage of

the power inductor L1800 in the

backlight circuit

Refer to the service guide L3

Abnormality or damage of the

backlight driver IC

Refer to the service guide L3

Black screen, white

screen and blurred

screen when the

backlight is OK

Soldering abnormality or damage of

the EMI devices (LB1800, LB1801,

LB1802, LB1803, LB1804) connected

in series on the LCD MIPI signal line

Refer to the service guide L3

LCD connector

Front shell

assembly

A310 L2 Service Manual

4) Touchpad Issue

Description

Reason

Solution

Malfunction of touch

screen

Problem of the TP

Exchange the front shell module to

judge if the TP is OK

Damage of the TP connector

Replace the TP connector

Pseudo soldering or damage of

R1835 and R1836 at the TP

connection

Refer to the service guide L3

CPU

Refer to the service guide L3

TP connector

Front shell

assembly

A310 L2 Service Manual

5) Proximity Sensor

NO.

Description

Reason

Solution

Proximity Sensor is

not well

MB is broken

Refer to L3 service manual

Proximity Sensor is not

well

Change the Sensor

TP is broken

Change the LCM

6) Accelerometer

NO.

Description

Reason

Solution

G-sensor

doesn't work

MBis

broken

Refer to

service

manual

7) Keypad

NO.

Description

Reason

Solution

Keys

doesn't work

MBis

broken

Refer to

service

manual

A310 L2 Service Manual

8) Charging

Description

Reason

Solution

No charging

Data cable issue

Change the data cable

I/O connector

Change the I/O connector

Charger issue

Change the charger

PMU

Refer to the service guide L3

Charging slow

Data cable issue

Change the data cable

I/O connector

Change the I/O connector

PMU

Refer to the service guide L3

CHARGER

A310 L2 Service Manual

9) USB

Description

Reason

Solution

NO CHARGING

CABLE ISSUE

Change it

CHARGER ISSUE

Change it

The I/O connector of PCBA is

with issue

Change the I/O connector

CPU

Refer to the service guide L3

Cannot use DATA

D+ or D- is broken

Change the data cable

DATA CABLE

A310 L2 Service Manual

10) Rear / Front Camera

Description

Reason

Solution

Bad image

Soldering issue

Re-solder it

Camera issue

Change it

CPU

Refer to the service guide L3

Camera not ready

Soldering issue

Re-solder it

Camera issue

Change it

CPU

Refer to the service guide L3

DEAD, No

functionality

Soldering issue

Camera issue

Change camera

CPU

Cannot turn to front

camera

Camera issue

Change front camera

Cannot turn to back

camera

Camera issue

Change back camera

Back camera with

flashlight

Front camera

Back camera

A310 L2 Service Manual

11) Flash Light

NO.

Description

Reason

Solution

G-sensor

doesn't work

MBis

broken

Refer to

service

manual

12) Vibrator

Description

Reason

Solution

Vibrating is not

properly

Vibrator assembly issue

Assembly it again

Vibrator issue

Change it

No vibrating

Vibrator soldering issue

Soldering it again

Vibrator issue

Change it

PMU

Refer to the service guide L3

VIBRATOR

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