Micromax A190 Manuel

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

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

For any Query or suggestion, Please write to tech.help@micromaxinfo.com

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