Fixing Treadmill Control Board

Discussion in 'General Electronics Chat' started by Touchstone57, May 11, 2014.

  1. Touchstone57

    Thread Starter New Member

    May 11, 2014
    4
    0
    Hello,

    Midway through a run my treadmill stopped working - however the power was still on as was the LED display, but the motor stopped turning.

    I took the front off where the motor sits and it was incredibly hot. I assumed it must have overheated or burnt out due to too much stress. I unplugged the treadmill and left it for a few hours but with no difference.

    If I turn it on it seems fine, and if I start the treadmill the counter will even increase as if I am running, however the motor will not turn.

    I took out the motor and cleaned the treadmill, and then put in a new motor. However I still could not get it to work, even though everything appeared to be on. I also noticed the heart rate monitor was spazzing out and saying my heart rate was over 150BPM, even when I wasn't running, which led me to believe it is an electrical malfunction.

    I had a further look on line and read something about burnt resistors. Sure enough it looks as if one of the resistors is burnt and there is a blackish stain on the control board.

    This is a Chinese branded treadmill without any information supplied. I cannot find any information about it on line either.

    Would be grateful for some advice on this as to what people would do next - I don't have much knowledge of small electronics or any specialist tools.
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,510
    2,369
    That makes it a bit hard to help remotely!

    If the you replaced the motor, we can assume that is not the problem.
    Is the resistor burnt open?
    There is not much else to go on, if you can at least post a picture it may help?
    Max.
     
  3. Touchstone57

    Thread Starter New Member

    May 11, 2014
    4
    0
    Well, I have a little experience, but I haven't done much soldering etc. I could probably replace the whole board if I had to...!

    Here are the pictures:

    [​IMG]

    [​IMG]
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,093
    3,033
    Wow, is that puddle of goo still a fluid? It looks to me like that cap has ruptured.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,510
    2,369
    Some put epoxy on the large objects when mounting to help retain it to the board.
    Max.
     
  6. Touchstone57

    Thread Starter New Member

    May 11, 2014
    4
    0
    So what do you suggest?
     
  7. Touchstone57

    Thread Starter New Member

    May 11, 2014
    4
    0
    Do you think I would need to replace the board here?

    The main worry is that I cannot find the exact replacement for this board from the manufacturer. Would a different type of board work if it was connected up the same?

    I'm aware of course that each treadmill will be wired up differently with different things going in the display so it seems doubtful.
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,510
    2,369
    If the motor had overheated you may have blown one of the power heat sinked devices, you could check them with a meter preferably out of circuit.
    Try a lamp across the motor terminals to see if there is power when you start the T.M. it will most likely error out shortly after as there will be no feedback tach.
    You cannot use other boards due to the different input controls.
    Max.
     
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