Micromax A190 Manual

A190 Disassembly Procedure
1. Technical Specifications
Particular
Remarks
Key Matrix For Flashing
N/A
Chipset
MT6591
Android Version
KITKAT 4.4.2
Frequency
Quad 1.5GHz
Network Mode
GSM850/900/1800/1900
WCDMA 900/2100
ROM
8GB
RAM
1GB
Internal SD Card memory
NO
Expandable Memory
32GB
Factory mode code
*#510838#

A190 Disassembly Procedure
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. Disassembly Procedure
(1) Remove Battery Cover
Remove battery cover from the removal position as shown:
BATTERY COVER
REMOVAL POSITION

A190 Disassembly Procedure
(2) Remove Screws
After removing battery cover, remove the 11 screws circled in red by using screwdriveras shown:
(3) Remove Front Cover/Rear Cover
Remove rear cover by using disassembly piece along the side commissure of both covers as shown:

A190 Disassembly Procedure
(4) Remove Coaxial Cable
Loosen the buckling positions circled in red of coaxial cables either end and take down coaxial cable.
(5) Remove Mylar under Battery
Slowly lift one angle of the mylar by using tweezers, then slowly tear down it by hand (don’t take too much
force to protect keypad board’s arranging wires from being damaged).
SLOWLY TEAR DOWN MYLAR

A190 Disassembly Procedure
(6) Remove Keypad Board
First tear down the yellow mylar on the arranging wires’interface, then loosen ZIF arranging wires, motor; finally
slowly remove small panel from front cover as shown:
LOOSEN MOTOR
LOOSEN ARRANGING WIRES
KEYPAD BOARD
KB IS REMOVED FROM FRONT
COVER MODULE

A190 Disassembly Procedure
(7) Loosen Mainboard & Remove Camera
Loosen power key, volume key and arranging wire interfaces of TP/LCD/front & rear camera, and remove front
and rear cameras.
(8) Remove Mainboard
Slowly tear down KB arranging wires as shown and take out MB; loosen the interface connected KB arranging
wires and MB, and take down KB arranging wires.
VOLUME KEY
LOOSEN TP ARRANGING
WIRE INTERFACE
REAR CAMERAARRANGING WIRE INTERFACE
MB SCREW
FRONT CAMERA
ARRANGING WIRE
INTERFACE
POWER KEY
LOOSEN LCD
ARRANGING WIRE
INTERFACE
TEAR DOWN KB ARRANGING WIRES
INTERFACE

A190 Disassembly Procedure
(9) Weld and Take Down Power Key and Volume Key
Weld down power key and volume key by using soldering iron and take them down.
(10) Remove Speaker, Len andAntenna
Take out speaker from rear cover by using tweezers; use hot air gun to heat the len and use a cotton bud to
push it up. Use tweezers to lift GSM antenna and slowly remove it.
POWER KEY
VOLUME KEY
LEN
SPEAKER

A190 Disassembly Procedure
(11) Remove Receiver, Sense Rubber Sleeve, GPS Antenna and WIFI/BT Antenna Lift receiver from the removal
position by using tweezers, remove sensor rubber sleeve, and slowly lift antennas by using tweezers.
LIFT GSM ANTENNA FROM HERE
WIFI/BTANTENNA
REMOVAL POSITION
SENSOR RUBBER SLEEVE
GPS ANTENNA

A190 Disassembly Procedure
(12) Remove OGS Panel
Use hot air gun to heat the gum periphery of OGS Panel, then use sucking disc to suck up OGS panel, and
take it tout from front cover.
Thanks
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