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Your Problem: jazfit-750 Treadmill motor will not turn on

I have a Spirit model 774P Cushion Flex treadmill. Has been running fine. today when i turned it on the tread would not run. Motor appears to be fine, not frozen and it does not smell as if it were burnt. I can turn it by hand it turns smoothly and the tread moves fine and the belt from the motor to the tread is good. All other functions of the treadmill appear to be working fine. When primary power is turned on a light on the primry power pc board comes on but doesn't appear to be getting to the motor. There is another pc board involved. not sure where to go from here. I noticed there is no Sporting equipment expert so I am just taking a shot. PS couldn't find my model listed so I just picked one. treadmill does not work, power is on but won;t start and after 10 second the light come off

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DEAR
AT FIRST YOUR MOTOR CONTROL BOARD IS DAMAGE
I can turn it by hand it turns smoothly and the tread moves fine and the belt from the motor to the tread is good

Posted on Apr 10, 2017

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Posted on Jan 02, 2017

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SOURCE: Your Problem: Spirit Treadmill motor will not turn on

I'd start by attaching a voltmeter across the motor contacts to see if you get any voltage when the unit is turned on. It's probably an AC motor but I'd check the label to be sure. If you get voltage but no turning either the motor or a startup capacitor is bad. If this is the case try moving the tread by hand with the unit turned on. If it moves on it's own after you start it moving then the start up cap needs to be replaced. Otherwise it may be time to replace the motor. If you don't have voltage across the motor contacts when the machine is turned on, I'd unplug the unit and trace the lines back from the motor to somewhere on the PC board. I'm guessing there's probably a relay on the PC board that controls the motor. I'd use an ohm meter to make sure the relay coil hasn't turned into an open circuit. Next I'd put a voltmeter across the relay coil, plug the unit back in, and turn the treadmill on and off several times. Ideally you should see the voltage across the relay coil go up and down as you turn the treadmill on and off. This voltage could be AC or DC depending on the type of relay used. If you get the proper voltage across the coil but the relay contacts aren’t' opening and closing to provide power to the motor then you need to replace the relay. If you don't get the proper voltage across the relay coil the problem is further back on the PC board.

Posted on May 15, 2009

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I'd start by attaching a voltmeter across the motor contacts to see if you get any voltage when the unit is turned on. It's probably an AC motor but I'd check the label to be sure. If you get voltage but no turning either the motor or a startup capacitor is bad. If this is the case try moving the tread by hand with the unit turned on. If it moves on it's own after you start it moving then the start up cap needs to be replaced. Otherwise it may be time to replace the motor. If you don't have voltage across the motor contacts when the machine is turned on, I'd unplug the unit and trace the lines back from the motor to somewhere on the PC board. I'm guessing there's probably a relay on the PC board that controls the motor. I'd use an ohm meter to make sure the relay coil hasn't turned into an open circuit. Next I'd put a voltmeter across the relay coil, plug the unit back in, and turn the treadmill on and off several times. Ideally you should see the voltage across the relay coil go up and down as you turn the treadmill on and off. This voltage could be AC or DC depending on the type of relay used. If you get the proper voltage across the coil but the relay contacts aren’t' opening and closing to provide power to the motor then you need to replace the relay. If you don't get the proper voltage across the relay coil the problem is further back on the PC board.

May 15, 2009 | Spirit Esprit ET4 Treadmill

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