Micromax Selfie 3 E460 Bedienungsanleitung

E460 L2 Service Manual

1: Technical Specifications

Particular

Remarks

Key Matrix For Flashing

Chipset

Qualcomm 8940

Android Version

Android M

Frequency

1.4G OCTA

Network Mode

850MHz/900MHz/1800MHz/1900MHz

WCDMA Band

B1/B2/B5/B8

4G Band

B1/B3/B7/B8/B20/B40/B38/41/B28A/B5

Rom

16G

RAM

Internal SD Card memory

8.79G

Expandable Memory

128G

Factory mode code

Press Volume- & power key at the same time

Good Earpiece volume

32Ω± 15%

Good Loudspeaker volume

8Ω± 5%

Good MIC volume

2.2kΩ± 5%

Good Vibrator volume

30Ω± 5%

2: CAUTIONS

I. Upgrading & 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: service Details

Main

Camera

LCD&TP

connector

SPK box

connector

Front

camera

Battery

connector

RF cable

Vibrator

I/O

SPK slot

RFANT

WIFI/GPS/BT

Antenna

Earphone

Connector

Key FPC

Connector

Main FPC

RFANT

Slot

RFANT

Fingerprint

Connector

1. Does not power on

SN.

Possible Cause

Validation steps

Action

Battery

a) Check battery PIN if it is damage or

oxidation

b) Check voltage with Multi meter Value

must be 3.7V DC or above

a) Clean battery PIN

b) Charge the battery or

replace for a new

battery

Power Key

Power key FPC fail

a) Clean power key FPC

b) Replace for a new FPC

SW failure

Upgrading with latest software

Upgrading

Battery

Connector

Check battery connector if it is broken or

oxidation

Clean the battery

connector or change for a

new one.

PCB

Check shorting with Multi meter

Suspected PCB faulty

Change PCBA

Power- Key

Battery

connector

2. Display issue/No display

SN.

Possible Cause

Validation steps

Action

No display

SW issue

Flash the handset with latest SW

LCD issue

Clean LCD connector/Re-assemble

LCD/Replace it

LCD issue

Re solder LCD connector/ change a new

LCD （NA）

PCBA issue

Clean LCD connector）/Re-assemble to

PCBA

Colored screen

LCD issue

Re-assemble LCD/Replace it

Dark screen

LCD issue

Re-assemble LCD/Replace it

LCD backlight circuit issue

Change PCBA

LCD

connector

LCD/TP

3. Touch panel

SN.

Possible Cause

Validation steps

Action

TP not working

SW Issue

Flash the handset with latest SW

TP issue

Clean TP connector/Re-assemble TP

TP issue

Re-solder TP FPC/ change TP（NA）

PCBA issue

a) Clean TP connector/ Re-assemble

b) Change PCBA

4. Fingerprint

SN.

Possible Cause

Validation steps

Action

Finger print Failure

SW Issue

Flash the handset with latest SW

Finger print Failure

Re-assemble / Change Finger print

SUB PCBA Failure

Re-assemble / Change SUB PCBA

Main FPC Failure

Re-assemble / Change Main FPC

PCBA issue

Re-assemble / Change PCBA

TP/LCD

connector

5. Proximity Sensor

SN.

Possible Cause

Validation steps

Action

Proximity sensor fail

SW Issue

Flash the handset with latest SW

Sensor holder is not

assembled well

Clean it and Re-assemble the sensor

holder

PCBA issue

Change PCBA

２

Front housing assay fail

Front housing issue

Change for a new front housing assay

Proximity

sensor

P-Sensor silicone gel

sleeve

Fingerprint module

PCBA

Fingerprint module

connector

6. Gyroscope sensor

SN.

Possible Cause

Validation steps

Action

Gyroscope fail

SW Issue

Flash the handset with latest SW

PCBA issue

Change PCBA

7. Hall

SN.

Possible Cause

Validation steps

Action

Hall fail

SW Issue

Flash the handset with latest SW

PCBA issue

Change PCBA

Gyroscope

sensor

HALL

8. Keys

SN.

Possible Cause

Validation steps

Action

Key is not response

Key is fail

Change Key

Re-solder Key FPC（NA）

The feeling of pressing

key is bad

Key is fail

Change Key

Some dust with dome

Clean it

Key is not assembled well

Re-assemble it

Power -Key

Power- Key

Connector

9. Charging

SN.

Possible Cause

Validation steps

Action

Cannot charge

Adapter is fail

Change adapter

Cable is fail

Change Cable

Battery is issue

Charging / Change it

Main FPC issue

Re-assembly or Change it

SUB PCBA issue

Change SUB PCBA

USB socket

Clean the socket

Have charging icon, but

not charged

SW Issue

Flash the handset with latest SW

Battery connector issue

Change PCBA

Battery fail

Change battery

PCBA fail

Change PCBA

Main FPC

Battery

connector

Adapter

SUB

PCBA

USB

Cable

10. Cannot connect to PC

SN.

Possible Cause

Validation steps

Action

Cannot connect to PC

USB cable is fail

Change USB cable

SUB PCBA fail

Change SUB PCBA

Main FPC issue

Re-assembly or Change it

Systems driver issue

Update systems driver.

PCBA fail

Change PCBA

USB

Cable

I/O

connect

Main

FPC

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