Mobile Phone Fault Finding for Mobile Cell Phone Repairing

Mobile Phone Fault Finding for Mobile Cell Phone Repairing

To repair any mobile cell phone through the circuit, we should know the section in which the fault exists and in that particular section, there are different parts and components. If we know different parts and components in different sections inside a mobile cell phone, then we can easily repair the fault by checking the ingredient.

While repairing the mobile phone, we know the different sections within the mobile cell phone so we can do a mistaken search. For example - if the mobile phone has a network problem then we know the different parts, components and their function in the network section, so we can easily repair the phone.

Within a mobile cell phone, following the various electronic parts and components in different sections are:

Network Folt:

 Antenna Switch, PFO, Fem, RF IC, VCO, Rx-Filter, TC-Filter, RF Antenna, RF Crystal, External Antenna Socket, Network Signal, and Supply Control and Interface Section. If we know about the parts and components in the network section and their work, then we can easily repair the mistake by looking at the circuit number and code number of the faulty component in the PCB layout diagram. In this way, we can easily make good use of the circuit diagram for mobile cell phone repairs.

Power On Fault:

 Battery (3.7 V), Battery Connector Jack, Power IC, CPU, Flash IC, S-RAM IC, RF Crystal, RF Clock Section Component, RF IC, Power On / Off Trigger Component.

Charging Fault: 

Charger (5-6 V), Battery (3.7 V), Charger Connector, Charger Voltage Fuse, Coil, Charger Over Voltage Protector, Charging IC, Power IC, Charging Regulator, Charging Voltage Output Component, Charger and Charger Voltage Detector Component.

SIM Folt:

 SIM card, SIM socket, SIM signal and supply interface component, resistance, coil, power IC, CPU   etc.

Ringer Folt:

 Ringer, Ringer Signal Input and Output Component, Audio Amplifier IC, Power IC, CPU etc.

Ear Speaker Fault: 

Ear Speaker, Ear Speaker Signal Component, Audio Amplifier IC, CPU, Power IC etc.

Micro SD Card Fault / MMC Fault: 

Micro SD Card, Micro Card Connector, Micro Card Detector Switch, Micro Card Detector, Signal Component, CPU etc.

USB and connector fault below: 

USB and down connector, USB and signal interface connector component, USB signal interface IC, USB driver IC, CPU etc.

Keypad Fault:

 The key device, keypad dot sheet, key signal filter, key signal variant, a keyboard for a key connector,   CPU etc.

Display Defects:

 LCD, LCD Connector, LCD Supply Component, LCD Signal Interface Filter IC, CPU, LCD Signal Interface Resistance etc.

MIC Sound Fault: 

MIC, MIC Interface Connection, MIC Signal, and Supply Component, Power IC, CPU etc.

Backlight (LED) Defects:

 LED, backlight driver IC, backlight driver section component, power IC, CPU etc.

Bluetooth Fault:

 Bluetooth Antenna, Bluetooth Driver IC, Bluetooth Section Crystal, CPU etc.

FM Radio Folt:

 Fands Free Lead, Hands-Free Connector, FM and Bluetooth IC, FM Driver IC, CPU etc.

Vibrator Fault: 

Vibrator Motor, Vibration Supply Component, Power IC, Vibrator Driver IC etc.

Touch panel (PDA) defects:

touch panel / PDA panel, touch panel control IC, CPU, signal interface parts etc.