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Old 08-19-2018, 08:29 PM   #7
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Join Date: Jun 2012
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Default Re: Treadmill DC Circuit no motor start

What voltage do you have between LG3 and LG2, it should vary between 0 and 5 volts when the speed control is turned.
Also check the reed switch wire, that may need to be connected, it receives pulses from the flywheel and may be needed to run.

The mov should be ok, if it was shorted you would know it when you connected the 120v ac. Look at at it closely to make sure its not cracked or split. It should measure open or very high resistance. I see a couple marks on it but thats likely all it is.
The KA324 are quad op amps, digikey has them for under $1.00. I would install sockets for them. something like digikey ae10012-nd or ed3114-nd would be fine.

Last edited by R_J; 08-19-2018 at 09:05 PM..
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