COMPONENTS OF A CHECK HOW TO
COMPONENTS OF A CHECK SOFTWARE
COMPONENTS OF A CHECK TRIAL

COMPONENTS OF A CHECK TRIAL

The problem is either solved by jumper or by trial and error ( check by replacement). There is no good sure test for these parts.

All other parts including SMD electronic components and ICs are generally not checked for fault.

Most mobile phone repair people and technician check only above parts to solve mobile phone hardware problems.

PS: When checking a faulty mobile phone with DC Power supply, connect the Red Probe to вЂњ +вЂќ and Black Probe to вЂњ вЂ“вЂќ of the Battery Connector of the Mobile Phone.

If there is beep sound from the DC Power Supply then there is problem with вЂњ +вЂќ and вЂњ вЂ“вЂќ or the mobile handset is short.

If the Ampere needle stands at some fixed point then there is problem with the Flash IC.

COMPONENTS OF A CHECK SOFTWARE

If the Ampere Needle fluctuates below 2 ten there could be problem with software or RTC ( Real Time Clock).If the problem is not solved then check by replacing them one by one. Give heat to these components using hot air blower. If there is no movement of the Ampere Needle of the Power Supply then the Battery connector, On / OFF Switch Track, RTC or Network Crystal is damaged.Check by replacing Power IC and the CPU one by one. If DC Ampere is over 6 then Power IC or CPU is damaged.Place the Red Probe / Test Lead of the DC Power Power Supply to the вЂњ +вЂќ of the Battery Connector of the mobile phone and the Black Probe / Test Lead to вЂњ вЂ“вЂњ: Power IC and CPUДЄdjust voltage of the DC Power Supply to 4.2. This shows that the Network IC is OK and not fault. The Needle of the DC Ampere will start moving. Switch ON DC Power Supply and call any number from your mobile phone. Use a Analog DC Power Supply to check Network IC. If there is continuity then the coil or the Boost Coil is good otherwise it is faulty. Coil and Boosting CoilД¬heck for continuity. If the LED is good then they will glow otherwise not. Keep the multimeter in Buzzer mode and check the LED. If there is sound then the diode is faulty. If it is good then the multimeter will NOT give any Beep or Buzz sound. DiodeД¬heck it with a multimeter on Buzzer Mode.

If there is sound then the capacitor is faulty. To check SMD Capacitor with a multimeter on Buzzer Mode. If there is no sound then the SMD resistor is faulty.

If it is good then the multimeter will give a Beep or Buzz sound. Resistor or ResistanceД¬heck it with a multimeter on Buzzer Mode. If there is no sound then the coil is faulty. If it is good then it the multimeter will give a Beep or Buzz sound.

COMPONENTS OF A CHECK HOW TO

How to Check Electronic Components CoilД¬heck the SMD coil with a multimeter on Buzzer Mode.

If we check by reversing the Red and Black Probes / Test Leads of the multimeter and check the microphone then there will be no value. NOTE: Please note that only one side of the microphone will show value. ON / OFF SwitchД¬heck voltage with a multimeter. Mobile Phone Keypad Track Row Column Battery Connector

Components of a check