How to troubleshoot cellphones???

by barkkathulla 2012-09-20 16:53:25

CELL PHONE SERVICING FAULTS AND TROUBLESHOOTING


ANTENNA PROBLEM

No network coverage, no access

SOLUTION:

A.USING MOBILE MENU OPTIONS
1.settings
2.network selection
3.automatic default
4. change into manual
now you get the home tower

B.USING MOBILE RESET OR RESTORE FACTORY OPTION

it is used to reset our mobile,if any virus is there thatâs also clear.but that time our sim&memory card remove from your mobile.

C.USING SOLUTIONS(IPA/CTC)

1.remove the body cover
2.apply ipa solution on the board in antenna section
3. after few seconds clean the area
now the problem is solve.

D.JUMPER SECTIONS

1.remove the body cover
2.find the antenna switch ic(placed near the antenna ic)
3. using micro tip soldering iron solder the jumper.as the following












ANTENNA CONNECTOR PROBLEM

Signal weak and one point tower

SOLUTIONS:

When u donât get the tower in all sim that time you follow this.

Remove the antenna connector and clean the connector area using eraser.1100,1620,2600 inthis model antenna connector fixed in top of the board.

SPEAKER PROBLEM

voice not clear and ringer volume is very low.

SOLUTIONS:

Remove the cover and check the speaker.if its failure remove thwe speaker and fix the new speaker.

DISPLAY PROBLEMS

(display connector,display card,display unit problem)

SOLUTIONS:

1. remove the cover and check the display
2. if failure remove the lcd and fix new lcd.
3. If u see any vertical lines in display change the strip or horizontal line change the display.

BATTERY CONNECTOR PROBLEM

(not charge,battery full,no back up)

SOLUTIONS

1.check battery connector
2.check it correctly fix in board.
3.check the battery
if battery connector failure change the connector.

SIM CARD CONNECTER PROBLEM(SIM REJECT,INSERT SIM)

SOLUTIONS

1.using blade clean the sim tray
2.apply mobile paste on sim ic then heat the area using blower
3.check the battery is fixed correctly.

KEYPAD CONTACT PROBLEM

numbers are not working

SOLUTIONS

1.clean the number pad using eraser in the board
2.clean the keypad area usinds ipa solution
3.change the carbon sheet
4.light problem using jumper connect the led.

HEAD SET CONNECTOR PROBLEM

voice not clear

SOLUTIONS

1.clean the connecter pin using blade.
2. adjust the pin to correctly fixed in board.
3.change the head set connector

CHARGE CONNECTER PROBLEM

mobile not charge

SOLUTIONS:

clean the connecter pin using blade.
2.adjust the pin to correctly fixed in board.
3.change the charge connecter.

MIKE&MIKE CONNECTER PROBLEM

voice not hear to receiver side

SOLUTION

change the mike unit

RINGER AND VIBRATOR PROBLEM

1.vibrator not woking
2.ring volume low

SOLUTION

1.change the vibrator motor

ON/OFF SWITCH PROBLEM

1.on/off not working

SOLUTION

1.change the carbon in old model
2. check the switch and replace it


DISPLAY AND KEYPAD LIGHT

1.keypad light is not working

SOLUTION

(follow display problems)

CAMERA UNIT PROBLEMS

camera not working

SOLUTION

1.chance the lence
2.change the camera unit.

MEMORY CARD CONNECTOR PROBLEM

memory card not accepted

SOLUTION

1.change the memory card
2.change the memory card connecter

WATER LOCK

mobile fall in water

SOLUTION



1.check the battery
2.check the battery connecter
3.check the r22 or r220 and power supply ic
4.45 min keep the board in ipa solutions and then clean the board
5.using blower heat the board
6.insert the new battery

PHONE DEAD

Mobile Donât Turn On

SOLUTIONS

1.check the battery
2.check the battery connecter
3.check the r22 or r220 and power supply ic
4.45 min keep the board in ipa solutions and then clean the board
5.using blower heat the board
6.insert the new battery
7.check the onn/of switch
8.check the resister and capacitor.

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