More actions
| Redmi Note 13 4G Not Charging | |
|---|---|
| Device | Redmi Note 13 4G |
| Affects part(s) | Logic Board |
| Needs equipment | Soldering Iron, Hot Air Station, Microscope |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering, BGA |
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Problem description
The device works fine, turn on and its fully functional but does not achrge at all and the charging is not even detected.
Symptoms
- Phone works but does not charge.
- Turns on with new battery
- Diode value on main connector is ok
- Charging is not detected in on state or off state
- Draw on AMP meter is 0.000V
Solution
Mainly this issue occurs with a faulty charger aur cable, in the result of this the device blows its OVP(Over Voltage Protection) ic to keep the device safe.
Note: Replacement of charger and charging cable is recommended after the repair.
Diagnostic Steps
To check all the voltages you have to plugin only the charger, battery is not required to check the following voltages.
- Measure diode value on the charging FPC connector
- Check voltage on VBUS 5.0 volt
- If 5.0 volt is present on the VBUS line then proceed to check the following components
- Check if ovp ic is working:
- Check the VBUS IN if is providing 5.0v
- Check the VBUS OUT if its porviding the 5.0v output
- If the VBUS OUT 5.0v is missing then proceed to the repair steps below.
Repair Steps
- Remove the OVP IC
- Probe the pads to see there is no short to ground
- if everything is ok then proceed to make a jumper bypass the OVP IC from VBUS _ OVP _ INPUT to VBUS _ OVP _ OUTPUT (shown in the picture below)
- Test if everything is working
- Apply solder mask and your device should be ready
