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Align starters

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Does anyone here know how the switch works?


MY align turns as soon as it is connected to the battery. I have taken one side off and the micro switch seems to work OK - at least it clicks when I press the actuator. I can’t properly check it without taking off the wires which seem to be soldered on.


Obviously the switching mechanism is more sophisticated as the micro switch connects to a little electronic board.


Has anyone got any suggestions 

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These starters have undervoltage protection for the LiPo battery, and operation is therefore more complicated than just the switch. I think the switch will be turning on a power MOSFET on the circuit board, quite likely this has failed short-circuit.

If electronic fault-finding fails to pinpoint the cause, you can buy a replacement board from AT here:




Obviously make sure that the microswitch is indeed working first.



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