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nba fastbreak motor


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hi does anyone know how the motor works on this game that turns the goal defence from side to side.i replaced a tip 107 on the small board that was rs and put 12v on the motor and it spins.what i cant work out is how it reverses.i tried reversing the polarity but it will only go one way.only played a couple of games as i iron out the bugs but seems to be very playable.
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hi does anyone know how the motor works on this game that turns the goal defence from side to side.i replaced a tip 107 on the small board that was rs and put 12v on the motor and it spins.what i cant work out is how it reverses.i tried reversing the polarity but it will only go one way.only played a couple of games as i iron out the bugs but seems to be very playable.

 

it uses optos and a motor controller that reverses the motor direction

 

i would check the switches

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