Oral B Toothbrush Charging Induction Voltage

Follow up video answering question about what the output voltage of the induction coil is in an Oral B Vitality toothbrush.

After closer inspection of the components under the microscope, and some basic probing, my best guess as to the failure is the timer/switching micro-controller IC (6683041) has failed from water ingress into the toothbrush. Lots of visible corrosion around the chip.

I'm no expert of course, but it's the only component I can see on the board that controls the gate trigger signal to the N channel MOSFET chip (TSM7401) which appears to be switching the motor on and off fine.

Original Oral B Vitality Destruction Video:    • How Not To Open An Oral B Vitality To...