Android Mobile fake charging Solution NEW METHOD | mobile repairing course full video

Introduction

This tutorial provides a comprehensive guide on how to resolve the fake charging problem common in Android devices, particularly in brands like Tecno and Infinix. You will learn effective troubleshooting steps without the need for using a diode, enabling you to fix the issue efficiently.

Step 1: Change the Charging Port

• Begin by replacing the charging port of the device. This is a crucial initial step that has proven effective in many cases.
• Even if the phone appears to be charging, it may not be increasing the battery percentage due to a faulty charging port.

Step 2: Check Charging Voltage

• Connect the charger to the phone.
• Set your digital multimeter to the DC range, preferably at 20 volts.
• Using the multimeter:
  • Place the black probe on the ground.
  • Touch the red probe to the battery positive connector.
• Check the voltage reading:
  • A typical charging voltage should be around 4.2 volts.
  • If the voltage is below 3.5 volts, it indicates a problem with the charging circuit.

Step 3: Assess the Charging IC

• If the voltage is adequate but the phone is still not charging, you will need to remove the main board to locate the charging IC.
• Identify the charging regulator on the PCB. This component stabilizes voltage before it reaches the battery.
• Use a schematic diagram to understand the voltage requirements and connections.

Step 4: Test Voltage Through Components

• Check the output voltage from the charging regulator:
  • It should supply around 4.5 to 5 volts.
• Locate the filter resistor connected to the charging circuit. Measure the voltage on both sides:
  • The output should be between 2.3 to 3 volts on the side connected to the power IC.
  • If you receive a voltage similar to the input (around 4.5 to 5 volts), the resistor may be faulty and should be replaced.

Step 5: Examine Power IC Voltage

• Continue testing through the circuit:
  • Ensure that the power IC is receiving the necessary voltage (around 2.8 volts).
• If the power IC is not receiving sufficient voltage:
  • Consider reballing or replacing the power IC.

Step 6: Inspect Battery Connector Tracks

• Check the battery connector tracks for any damage or obstruction.
• Ensure there are no resistors or components that could hinder the charging current.

Step 7: Final Troubleshooting Steps

• If all previous steps do not resolve the issue:
  • Test with a different battery to rule out battery problems.
  • Re-evaluate the charging port and replace it if necessary.
  • Consider jumping or bypassing components as a last resort.

Conclusion

By following these detailed steps, you can effectively troubleshoot and resolve the fake charging problem in Android devices. Always start with the simplest solutions, like changing the charging port, before moving on to more complex diagnostics. For further learning, consider enrolling in mobile repairing courses to deepen your understanding of phone repair techniques.