Treadmill controll problems

Discussion in 'Technical Repair' started by Chaarles, Jun 23, 2016.

  1. Chaarles

    Thread Starter New Member

    Jun 22, 2016
    Goo day
    i have a problem with my wife's treadmill.
    the problem is that when u start the machine up it count's down 3 2 1 and then throws a spark at the motor brush
    then trips at the protection switch.
    I had the motor tested and it is 100 %.
    disconnected the motor and tested the output voltage. it kicks out 310 v and slowly going down to o and then 0 v.
    i did found a current limiter was blown and replaced it but still no luck.
    Any help would be much appreciated.
    the info on the part is a QQ 2067 pulse power
  2. MaxHeadRoom


    Jul 18, 2013
    I would suspect the switching devices under the heat sink, QT1 and the one adjacent.
    It looks as though you are getting a full on condition instead of a ramp up, which will blow the fuse.