Hi,
I've got a Sears treadmill that has abruptly stopped working. Neither the carpet motor turns nor does the elevation motor. The control panel lights up, but pressing any of the buttons does not do anything. ie: trying to select a program doesn't work, pressing OK doesn't do anything, pressing speed controls don't do anything, nor does pressing the buttons for elevation.
The control board that seems fairly simple, but I'm not sure how/where to start debugging this. I presume that most treadmills follow similar logic board designs so I'm hoping that someone might recognize the symptoms and have some ideas.
The elevation motor is a 120VAC motor, which I've checked and confirmed works properly. The carpet motor is a 110VDC motor which I have been unable to test (where do I get a 110VDC source from?!), but would be surprised to see not working.
When I first turn the treadmill on by the master power switch, I hear a "click" - the primary relay engaging (it's an 832A-1A-C relay). However, that's about it. I'm not sure what to check next.
Most importantly, I don't understand the symptoms. If the panel doesn't respond to a user pressing a button - might I be looking in the wrong place? Might it be something flaky in the panel instead of the controller board? Is there a way I can validate that the controller board works?
I'm attaching a picture of the controller board, and of the overall circuit diagram. I'm also interested in the nomenclature of the panel's connector (JK1). I do not recognize what VR1 means.
I realize that this is a very open ended question, so I would appreciate any thoughts/suggestions/advice as to how to tackle this. I contemplated replacing the controller board, but Sears wants over 400$ for the board, so that is out of the question.
Thanks!
Eric
I've got a Sears treadmill that has abruptly stopped working. Neither the carpet motor turns nor does the elevation motor. The control panel lights up, but pressing any of the buttons does not do anything. ie: trying to select a program doesn't work, pressing OK doesn't do anything, pressing speed controls don't do anything, nor does pressing the buttons for elevation.
The control board that seems fairly simple, but I'm not sure how/where to start debugging this. I presume that most treadmills follow similar logic board designs so I'm hoping that someone might recognize the symptoms and have some ideas.
The elevation motor is a 120VAC motor, which I've checked and confirmed works properly. The carpet motor is a 110VDC motor which I have been unable to test (where do I get a 110VDC source from?!), but would be surprised to see not working.
When I first turn the treadmill on by the master power switch, I hear a "click" - the primary relay engaging (it's an 832A-1A-C relay). However, that's about it. I'm not sure what to check next.
Most importantly, I don't understand the symptoms. If the panel doesn't respond to a user pressing a button - might I be looking in the wrong place? Might it be something flaky in the panel instead of the controller board? Is there a way I can validate that the controller board works?
I'm attaching a picture of the controller board, and of the overall circuit diagram. I'm also interested in the nomenclature of the panel's connector (JK1). I do not recognize what VR1 means.
I realize that this is a very open ended question, so I would appreciate any thoughts/suggestions/advice as to how to tackle this. I contemplated replacing the controller board, but Sears wants over 400$ for the board, so that is out of the question.
Thanks!
Eric
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