Micromax Selfie 3 E460 User manual

E460 L2 Service Manual
1: Technical Specifications
Particular
Remarks
Key Matrix For Flashing
NA
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
3G
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
TP
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
t

1. Does not power on
SN.
Possible Cause
Validation steps
Action
1
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
2
Power Key
Power key FPC fail
a) Clean power key FPC
b) Replace for a new FPC
3
SW failure
Upgrading with latest software
Upgrading
4
Battery
Connector
Check battery connector if it is broken or
oxidation
Clean the battery
connector or change for a
new one.
5
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
1
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
2
Colored screen
LCD issue
Re-assemble LCD/Replace it
3
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
1
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
TP
b) Change PCBA
4. Fingerprint
SN.
Possible Cause
Validation steps
Action
1
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
TP
connector

5. Proximity Sensor
SN.
Possible Cause
Validation steps
Action
1
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
Fingerprint module
PCBA
Fingerprint module
connector

6. Gyroscope sensor
SN.
Possible Cause
Validation steps
Action
1
Gyroscope fail
SW Issue
Flash the handset with latest SW
PCBA issue
Change PCBA
7. Hall
SN.
Possible Cause
Validation steps
Action
1
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
1
Key is not response
Key is fail
Change Key
Re-solder Key FPC（NA）
2
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
1
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
2
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
1
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
or
Main
FPC