If mobile doesn't switch on then
1.Check battery.
2.Try with the charger.
3.Check Battery Connector.
4.Check Shorting in FEM, UEM, Backlignt IC, Audio Amplifier IC.
5.Check power on/off button.
6.26 MHZ crystal, CPU, Memory, Power IC
7.While flashing Ist boot error and IInd boot error shows then UEM is faulty.
Low Netowork
1. Check PFO, Antina Switch and FEM IC
2. Check Antina and its contact points.
--------------------------------------
Network Provoiders List Doesn't show while manual search
Check PFO, Antina Switch and FEM IC
--------------------------------------
Network is ok but can't call
Check CPU and RF IC
---------------------------------------
In Manual Network Search, NO Access Fault
Check/Change Antina Switch or FEM IC
-------------------------------------
No charging
Check Charger, Charging Socket, Charging Fuse, Charging Coil, Diode, Charging IC
-----------------------------------------------
Not Charging, Charger is plugged
Check charging protection register, charging IC
------------------------------------
No Display
Display, Display IC, Display Connector
-----------------------------------
Buttons of the keypad are automatically working
Clearn the keypad, Check/Change keypad IC
-----------------------------------------------
Insert SIM Fault
Check SIM Socket, SIM IC, Clean Battery point carbon, Change/Check the battery, SIM socket, Battery Connector
-----------------------------------------------
Ringer is not working
For this check ringer and it's jumper, also check logic IC and Audio Amplifier IC
-----------------------------------------------
Vibrator is continuous on
For this check /change UEM IC
-----------------------------------------------
There is no backlight on
For this check LEDs, Display connector, Display cable & Backlight IC.
---------------------------------------------
Hands free is not working
Check handsfree socket and UEM IC
Tags
Tutorial
Post a Comment