My TPS320 can't use NFC

Question

I found that my device can't use NFC function. What should I do?

Answer 1

1. Check if the system can recognize the “Security OS version”.

Settings->about phone-> Security OS version;

2. Check if the welding of the CON2 small board and its peripheral components is normal;

3. Check if the NFC_5V voltage is normal;

4. Check if the 27.12m (Y3) crystal oscillator starts vibration;

5. Replacing the NFC antenna;

6. Replace U1