Micromax L2 User manual

A069 L2 Service Manual

CAUTIONS

Please refer to the phone’s user’s guide for instructions relating to operation, care, and maintenance, which include

important safety information.

Servicing and alignment must be undertaken by qualified personnel only.

Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn.

Use only approved components as specified in the parts list.

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

Ensure all cables and wires are repositioned correctly

Electrostatic discharge can easily damage the sensitive components of electronic products. Therefore, every service

supplier must observe the precautions which mentioned above.

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A069 L2 Service Manual

SPEC：

Network：2G: 850MHz/900MHz/1800MHz/1900MHz

Size：145*73*9.7

Camera: Back camera 5 FF Mega, Front camera 0.3 Mega

Battery: 1850 MAH

BT:4.0

USB:Micro USB 2.0

Main Function

Dual Card Full Touch Smartphone

Android 4.2

CPU MT 6572 (1.3GHz Dual core)

5 " FWVGA480*854

Camera：Back camera 5 FF Mega, Front camera

0.3 Mega

WIFI: 802.11n, 802.11g, 802.11b

4GB+512MB

Dual SIM

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A069 L2 Service Manual

SERVICE TOOLS

Voltage regulator

Multimeter

Iron

Hot air gun

Solder wire, soldering paste

Computer and software download cable

Metal tweezers, Screw driver etc

Pick

Driver

Tweezers

Wrist

groun

ding

strap

Antistatic

gloves

upDownlo

ad cable

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A069 L2 Service Manual

CHAPTER 4.SYSTEM BLOCK DIAGRAM

4.1、PCBA A-Side

J1003 Earphone

connector. bug by

damaged.

Earphone no sound

J1203 I/O Connector

bug by damaged No charge

in, Cannot upgrade Software

U301 Flash Bug by

damaged

Cannot power on, cannot

upgrade software.

U101 CPU Bug by

damaged

Cannot power on. No RF

signal. No display or

display abnormality

U401 Power IC Buy by

damaged,Cannot power

on.

No charge in.

Speaker no sound.

U701

BT/WIFI/FM/GPS IC.

Buy by damaged.

BT/WIFI/FM/GPS Not

work

J1205 Battery connector

Bug by damaged.

Not power on.

Not charge in

U501 RF IC

Bug by damaged.

No signal

Can’t power on.

U605 GSM PA

Bug by damaged.

No signal. Large

current

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A069 L2 Service Manual

PCBA-B-Side

J1204 T-Flash

connector

Bug by damaged.

Can't Access T-Flash

Card.

J901 Camera

connector

Bug by damaged.

Can’t take photos.

J1201 J1202 SIM

connector

Bug by damaged.

Cannot the SIM card.

J802 TP Connector

Bug by damaged.

TP not work.

J801 LCD Connector

Bug by damaged.

LCD No display or

display abnormality

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A069 L2 Service Manual

4.2:Side A layout

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A069 L2 Service Manual

Side B layout

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A069 L2 Service Manual

CHAPTER 6 TROUBLESHOOTING

CANNOT POWER ON-CURRENT SWING INSTABILITY

Upgrade the

software is normal?

Cannot power on

Replace the

structural member.

Check the battery is

normal?

Check the battery

connector in normal?

Replace the PCBA is

normal?.

Replace the battery.

yes

Replace the battery

connector.

yes

Replace the PCBA.

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A069 L2 Service Manual

REPAIR FLOW FOR PHONE DEAD

Phone dead

Upgrade the software can

settle the defect issue?

Clean and reinstall

the keypad or replace

the touch panel.

Check battery connector

and battery touch point if

is dropped or dirty?

Check the keypad if stuck

or touch panel do not work

to make the phone “dead”?

Replace the PCBA

Clean or replace

the battery or

battery connector.

YES

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A069 L2 Service Manual

NO DISPLAY OR DISPLAY ABNORMALITY

No display or display

abnormality after power on

Check LCD connector

is OK or not

Resolder the LCD

connector can settle

the defect issue?

Replace the PCBA.

Check LCD if damage or

liquid flow out

Change LCD

Yes

Clean or reweld

the LCD connector

Yes

Change the LCD can

settle the defect

issue?

Upgrade software

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