1. Check the charging pin connector, clean it, including the terminal pads on the PCB board. Replace the charging pin connector if already damaged.
2. Check also the battery terminal connectors, clean it if necessary.
3. Get your multimeter then check the fuse, coil, doide and capacitors for possible shorted and open circuit. Replace if found damaged.
3. Trace and check the Charge IN voltage line paths from the pin connector down to the capacitor near the PEARL IC.
If the above procedures doesn't work and fix the problem, the possible faulty id the PEARL IC, reworking it might only help fix the not charging problem on your Nokia X3-02 repair.