Micromax Q301 Manuel utilisateur

Q301 L2 Service Manual

1：Technical Specifications

Particular

Remarks

Chipset

SC7731C

Android Version

N/A

Frequency

GSM 850/900/1800/1900 WCDMA900/2100

Rom

4GB

RAM

512MB

Factory mode code

*#629#

Q301 L2 Service Manual

2、service Details

1. Does not power on

S.NO

Possible Cause

Validation steps

Action

Shorting

Check shorting with Multi meter

Replace PCB if found

faulty

Battery

Check voltage with Multi meter Value must

be 3.7V DC or above

Replace if found faulty

Battery

Connector

Check battery connector

Re-solder/Replace if

found faulty

SW failure

Flashing with latest software

Flashing

Power on Key

Key failure

Re-solder/Replace if

found faulty

PCB

Suspected PCB faulty

Refer L3 repair

Q301 L2 Service Manual

2：Display issue/No display

S.NO

Possible Cause

Validation steps

Action

No display

SWissue

Flash the handset with latest SW

LCD issue

Re-assembly LCD/Replace it

PCBA issue

Re-assembly PCBA/Replace it

PCBA issue

Re-Solder the LCD connector or change it

Dark screen

LCD issue

Re-assembly LCD/Replace it

SWissue

Flash the handset with latest SW

Q301 L2 Service Manual

3：Touch panel

S.NO

Possible Cause

Validation steps

Action

TP not working

SW Issue

Flash the handset with latest SW

TP issue

Re-assembly TP/Replace it

PCBA issue

Refer to L3 repair

PCBA issue

Re-Solder the TP connector or change it

TP not working proper

TP issue

Re-assembly TP/Replace it

PCBA issue

Refer to L3 repair

4：Keys

S.NO

Possible Cause

Validation steps

Action

Key is not response

Key is fail

Change Key

SW Issue

Flash the handset with latest SW

The feeling of pressing

key is bad

Key soldering Quality

Solder Key again

Some dust with dome

Clean it

Key is not assembled well

Re-assemble

Q301 L2 Service Manual

5：Charging

S.NO

Possible Cause

Validation steps

Action

Cannot charge into

Adapter is fail

Change adapter

Cable is fail

Change Cable

Battery is issue

Charging or Change it

Main FPC issue

Re-assembly or Change it

I/O connector is fail

Re-Solder or Change it

Have charging icon, but

not charged

SW Issue

Flash the handset with latest SW

PCBA fail

Change PCBA

Battery fail

Change battery

Battery connector issue

Change battery connector

Q301 L2 Service Manual

6：USB

S.NO

Possible Cause

Validation steps

Action

Cannot connect to PC

USB cable is fail

Change USB cable

I/O connector fail

Re-Solder or Change it

Main FPC issue

Re-assembly or Change it

PCBA fail

Change PCBA

Q301 L2 Service Manual

7：Camera

S.NO

Possible Cause

Validation steps

Action

Colored screen when

open front camera

Camera is fail

Re-assembly or Change it

PCBA fail

Change PCBA

Cannot turn on Rear

camera

SW issue

Flash the handset with latest SW

Camera fail

Re-assembly or Change it

Camera issue

Re-Solder or Change Camera connector

PCBA fail

Change PCBA

Q301 L2 Service Manual

8：Playing Video

S.NO

Possible Cause

Validation steps

Action

Hang often

SW issue

Flash the handset with latest SW

Flash poor soldering

Refer L3 Repair

CPU poor soldering

Refer L3 Repair

9：Vibrator

S.NO

Possible Cause

Validation steps

Action

Vibrating is not properly

Vibrate assemble issue

Re assemble it

SW issue

Flash the handset with latest SW

NO vibrate

Soldering issue

Re soldering it

PCBA issue

Refer to L3 service

Vibrate weakly

Vibrate issue

Change it

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