nemo wrote:fechter wrote:That's a 16v zener. Its the reference for the voltage regulator.
Thank You, that explains a failure on 36V and not on 24V then!
A 5v reg. was burned and also some caps.!
fechter wrote:I measured 16v across the one in my controller when it was powered up. You lose about a volt in the transistor.
Perhaps they figured out that was too high at some point and changed the value of it.
The feed to the hall sensors is through a resistor, so the actual voltage at the sensors drops when they are connected. Still, if the supplied voltage is really close to the failure point of the sensors, that could explain a lot of failures.
If the zener goes open or the transistor shorts, it would be real ugly for the rest of the controller.
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