Horizon threadmill control pcb.

Discussion in 'The Projects Forum' started by JAMESSPARKS, Jun 2, 2014.

  1. JAMESSPARKS

    Thread Starter New Member

    Jun 2, 2014
    3
    0
    I need to repair this DC Motor speed control board. I probably need to replace the power components (Mosfet , Mospec diode, SCR etc ).
    Two resistors on this board are burned ( bands not visible)
    R.3 which is positioned opposite the S6025L
    R.17 which is near the red led "down".

    What is ic U.1 . Looks like opto but has 5 pins (more like 6 with 1 snipped out) ?

    Thank you .
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
    Most likely Mosfet as SCR control is rarely used on a T.M.
    Any more without further info is pure speculation?
    Max.
     
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