Model #MC-70 MAGNAVOX Tabletop Systems

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Question and Answers

Q:

Proform treadmill will not run

A:

I understand that your treadmill is not running. While you are waiting for an expert to respond, I have attached some helpful links below that may provide information to assist you with your question. Have a great day!

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Alina -
June 15, 2013
A:

I guess I didn't realize that there were error codes for treadmills.From reading the links provided I couldn't find what I was looking for.As it stands so far I don't currently receive any error codes either by beeping or by the display.The display reads normal other than display movement indicator is reading that the treadmill is moving but it is not,it is not moving at all.

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Jack -
June 16, 2013
A:

Jack, there is usually a tech sheet under the hood in a plastic sleeve. if it is there look on the diagnostic check list. I can't see the image very good but it looks like there is only one small led light on the motor controller and if that light is lit then you have the correct voltage coming from the wall outlet and the controller is ready and since the console is lit up the console is getting the proper voltage from the controller. when the motor controller gets a signal from the console for the belt to start at any speed it should start flashing from being on steady. if it is flashing the controller is getting the signal from the console but is probably not sending the power to the motor. if it is not flashing the controller is not getting the signal from the console. the other side of the tech sheet there is a wiring schematic with the proper voltages for each colored wire coming from the console to the controller. you would need to verify the correct voltages to find out if it is the controller or the console not sending the speed signal to the controller. I would guess that you have a bad controller from what you have posted but to be sure you need to check those voltages before ordering any parts that you may not need and still have the same problem.

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TC -
June 16, 2013
A:

Thank you for your question. When the MC-70 motor controller board fails, the walking belt does not move but the incline will still go up and down. You may also see the error code E2 or E21 on the console With the power cord unplugged remove the lower cover. There are 2 boards. One is the MC 70 Motor Controller the other is the Power Supply Board. The Power Supply Board has a total of 4 LED's. Plug in the treadmill and you will see 2-3 lit on the power supply board. If 2 are lit move the walking belt and a 3rd LED will go on and off. Next insert the safety key. While watching the power supply board press the the start key. The 4th LED labeled PWM should start flickering. This would mean the console is working correctly. The other possibility is the motor has failed. Very rare but possible. To test the motor. It is not necessary to remove the motor for this test. There are 2 tests to confirm if the motor is working properly. Unplug the treadmill first. Using a fully charged battery from any device that has a 9-24 volt battery such as a rechargeable power tool. Remove the wires from the MC 70 motor controller. Connect them to the battery A fully charged battery will drive the motor and walking belt @ 1-1.5 mph. You should be able to walk on the belt . Don't do this very long because it will overheat the battery. Alternate test. Using a digital meter (DMM) measure the resistance across the A- wires (motor leads) after they are disconnected from the board. The reading on the Rx1 scale should be 1-5 ohms. If the test confirms the motor is good, then the motor controller has failed. With the treadmill unplugged, disconnect 7 wires (white-blue) (red- black) and (red-black-white) groups and remove the 4 screws. Install new board same way you removed old board. The circuit that fails is "on" all the time the treadmill is plugged in. The safety key does not have to be inserted. The MC-70 fails because of aging and a heat related problem. Proper maintenance will prolong the life of the walking belt ,motor, motor controller and the surface below the belt referred to as the walking board.Use a clean cloth with a mild cleaner and pressurized air to periodically clean between the belt and board. If you have never lubricated the belt it needs to be done. To see if your belt needs lubricating slide your fingertips across the underside of the belt. If they look shiny then the belt is ok. If they are dry then an application of lube is needed. You can order the lube at www.SearsPartsDirect.com.  P/N 06.831.202557. If you need a technician go to www.SearsPartsDirect.com.

If you need additional information please reply to this post.

Thank you for choosing Manage My Life.

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dtova00 -
Sears Technician
June 17, 2013
A:

Thanks everyone for the help.I've getting closer to getting this thing fixed. I did as you suggested and I may have an older model treadmill because there is only one circuit board a MC 2100 motor controller with a single led.From all the info from everyone I believe it is the Motor controller board that I need replacing so I'll order it and install it.Thanks again for everyone's input.

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Jack -
June 18, 2013
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Q:

Proform treadmill motor drive replacement

A:

Treadmills are great for exercising. I did some research on the motor but was not able to find an answer to your question. Your expert will be able to help give you a detailed answer. It may take 24-48 hours. I do hope that all goes well.

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Marc H -
July 13, 2012
A:

Thank you for your question.

I am sorry you are having a problem with the treadmill. I looked up the model number you submitted. I do not think the motor you received is the correct motor. The wire connections should not be different and the size should not be that different. If you ordered the Part from Sears I recommend contacting them about this. They may have ordered this from a third party vendor and it can be reordered. I see that the part is no longer available through us. I search for the correct part online and was able to find a site that has it. If you would like to be taken to that site please click here . I looked it over and it looks like the motor you need.

I hope this is helpful. Please feel free to reply below with more details if you need further assistance.

Thank you for using Manage my life.

Mark

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Mark T -
Sears Technician
July 14, 2012
A:

Hi Mark, Thank you for your reply. The part number we received from Sears/ICON yesterday, number 145168 MC70A, ARPS is for the motor controller. I call these drives so sorry for the confusion. The motor controller originally in the treadmill which needs to be replaced is model number 117494 MC54. The number of lugs do not match up as well as there are two jumpers on the new controller board which do not appear on the original, number 117494 MC54. Per my description above, if I use the new controller, a lug label "black" will not have a wire. If the controller sent, # 145168 is correct for our treadmill # PFTL72561,could you please send me a wiring diagram for the new controller (including jumper setting)? Thank you for your help. John

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John -
July 14, 2012
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Q:

Installing M70 motor control

A:

Managemylife.com is a great place to find the answers to just about anything, especially on appliances. I would suggest that you provide a little more information such as the make and complete model number of your product so your expert will be able to provide you the best possible answer. Just click on reply below where you can provide the additional information.

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Priscilla V -
November 22, 2011
A:

MC70 motor control board #145168R, goes on ProForm treadmill

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Patrick -
November 22, 2011
A:

Yes, you may very well smell a burning smell for a short time on a new (or rebuilt) controller board. I will mention that if your treadmill has a "choke" on it (looks like a transformer) it could be getting hot and causing a smell. If you do have a choke and it smells burnt you will want to replace it.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
November 25, 2011
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