To troubleshoot and repair charging issues on a Redmi 12C, follow these steps:
- Multimeter
- Soldering iron (if necessary)
- Screwdriver set
- Isopropyl alcohol and a brush (for cleaning)
Steps to Diagnose and Repair Charging Issues:
1. Inspect Charging Port
Check the USB port for dust, debris, or damage.
Clean it gently with isopropyl alcohol and a soft brush.
2. Test Charger and Cable
Use a different charging cable and adapter to rule out faulty accessories.
3. Check Battery
Power off the device and remove the back cover.
Disconnect the battery and measure its voltage with a multimeter. It should be around 3.7V.
If the battery voltage is low, consider replacing the battery.
4. Inspect Charging IC and Components
If the charging port is intact, check for damage
around the charging IC on the motherboard.
Look for burnt or damaged components.
5. Measure Voltage at Charging Port
With the device off, plug in the charger and measure the voltage at the charging port pins. You should see around 5V.
If no voltage is detected, the issue may lie with the charging IC or the motherboard.
6. Soldering Repairs
If there are any broken connections or a damaged charging port, use a soldering iron to make repairs.
Ensure you follow safety protocols and work in a static-free environment.
7. Reassemble and Test
After completing any repairs, reassemble the phone and test it with the charger.
8. Software Check
If hardware seems fine, check for software issues. Boot into recovery mode and consider performing a factory reset (after backing up data).
Conclusion:
If the charging issue persists after these steps, consult a professional technician for further diagnosis and repair