Your comments

Oh Yes, it's very similar to the state of my boards.

You will need desoldering smd tools to remove those 3 burned chips (PIC16F677, MCP2515, MCP2551). There are two more devices on the board, that you need to check. It's a 10k NTC and also a 3 pin (SOT-23) device. This last, it's also a thermal sensor. I can send you pictures of both later, ok?!

Ok Tommaso, as soon as you receive the scooter open the battery compartment and check for both front and rear temp sensor boards to see how damaged they are. Check also all the 12 sensors connected to the two battery's elements. You will need to disassemble the batteries to check all 12 sensors, these will most likely be burned as well.

Access also the charger and be ready to remove it. I will tell you later what are the pins on the 24 port interface to measure and check if the 5v regulator is shorted or not.

Do not hesitate to contact me.

Regards,

Carlos

Hello Tommaso and Azzuro.

Yes, I solved the problem buying the temp sensor frontal board and repairing the rear one with new components (PIC16F677, MCP2515, MCP2551, NTC-10K and a few more). I used the method referred by Azzuro, extracting (read) the hex file from the new frontal board and copying it to the new PIC16F677. This was done with a PicKit3 programmer, connected to the ICSP pins of the boards. The 5v regulator (7805) on the charger was also replaced because it was shorted.

Tommaso, if you decide to repair the boards, I can supply you the dump to program the PIC16F677, as Azzuro also offered, just let me know.

Good luck!

Hello Dave.

Did you find a solution for your charging problem?

I'm having a similar problem with my VX-1 and I couldn't find a solution yet. After some issues with the BMS (temp. sensors) the charger refuses to charge. It is most likely that the problem is only motivated by an incorrect battery temperature information but I'm not sure because I didn't receive yet the new BMS for replacement.

If you found a solution for your problem, please let me know. Thanks!