Varying the voltage 0-5vdc with a potentiometer between WHITE+ and BLACK - varies the boards output. The small gauge red, black, red wires that were jumping across the 2 boards is the speed control wiring that will be connected to the potentiometer.ĥvdc will be control voltage that you will have to supply now that there is no controller RED+. The board will now need speed control provided by the potentiometer you're going to add. You will now have 115 VAC~ power to the board. Put the blue and white from the incoming power plug onto the right hand board blue and white terminals respectively. Just unplug the blue and white from the board on the right, remove the jumper wires to the board on the right. It's for the incline motor, which, by the drawing is an AC motor. The power board on the left side in the first picture is useless to you for DC drive.
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