Speedo sensor circuit repair?

[fido-dido]

I have a losi brusless 1/10 speedo.

I have checked it out and also spoken to horizon and it's likely to be the sensor circuit in the speedo.

Has anyone had any experience on fixing the circuit.


The system is the speedo will only engage if the wheels are helped to spin manually.

It's got a similar fault as if it were a brushed motor and the brushes are sticking.


Any advise will help greatly, the speedo although 18 months old has hardly been used so will be a big waste to throw away

[Ema]

Reading your description, I'm quite sure that the problem is not the sensor circuit.

At 99% the problem is a broken mosfet; if the speedo needs to turn on that mosfet at startup the startup fails.
If you turn the motor slightly, then the speedo will start the motor using a different mosfet (different phase) and the motor start running.
Once that the motor is running it will continue running also if a mosfet is not working correctly.

Replacing a mosfet is a big problem in these kind of ESCs and cannot be done without some sophisticated soldering equipment (and also with that will be quite difficult).

Horizon will not offer a repair service because the xcelorin is actual some rebranded china stuff and the repair service will cost more than buying a new speedo .

Bye
Ema
P.S. Unfortunately I got a speedo like yours with the same problem .