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Faulty treadmill control board

Discussion in 'Troubleshooting and Repair' started by sgtlard, Jun 24, 2020.

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  1. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    FBEC0B2D-501A-4E7E-9EF1-CB4C4040EE19.jpeg

    Treadmill developed E1fault mid run.

    After googling and testing :
    Motor is ok - using a battery as per google
    Bushes ok - 2.5cm remaining
    All cleaned

    All features work except when starting the treadmill. Makes a partial turn and stops. Counts 6s and shows E1

    red led comes on, stays on.

    move safety off/on - same outcomes

    assuming it’s the control board - can’t see any obvious damage

    any ideas where to start?
     

    Attached Files:

    Last edited by a moderator: Jun 26, 2020
  2. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    Better board photo
     

    Attached Files:

  3. Bluejets

    Bluejets

    4,833
    1,017
    Oct 5, 2014
    Has that chip (U3) in photo 1 got a lump out of it..?
     
  4. sgtlard

    sgtlard

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    Jun 24, 2020
    Hi. I thought so but on closer inspection, it’s a thin line of the ‘glue’ that seems to be deposited all over the board supporting components.
     
  5. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    The operational issue has the feeling of Something attempting to start and blowing a fuse instantly so failing. Putting it under any load, fails.

    the fuse hasn’t blown.
    I tried taking the tension of the running belt as a precursor to replace/lubricate but it’s not even trying to move anything.

    Motor runs fine on the drill battery
     
  6. Alec_t

    Alec_t

    2,955
    803
    Jul 7, 2015
    Are any electrolytic capacitors bulging/leaking?
     
  7. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    Nothing I can see. All look intact.
     

    Attached Files:

  8. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
     
  9. pharaon

    pharaon

    380
    6
    Oct 28, 2014
    that caused of overload on the motor due to heavy running belt, i suggest you to lubricate the belt very well" between the belt and the underneath piece of wood " before assuming the fault in the circuit
     
  10. sgtlard

    sgtlard

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    Jun 24, 2020
    I’ll give that a try.
     
  11. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    Ok

    waiting on lubricant - so removed the belt and tried without any load ( except front roller )

    same result. Turns further but stops in seconds ( feels the same duration as before ) and E1 at 6s
    Power off/on and repeat - same result.

    the red led comes on each time - power off/on resolves it until test
     
  12. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    It’s like the starting of the motor pulls too much current, tripping out the control board and stopping

    I have to switch off power and back on to try again each time

    what would trip out on the drain and reset - is that the mofset ?
     
  13. pharaon

    pharaon

    380
    6
    Oct 28, 2014
    ok the M+ and M- for the motor try to measure the output voltage with DMM and see if it's constant or it disconnect after while
     
  14. WHONOES

    WHONOES

    1,133
    312
    May 20, 2017
    See if you can measure the current demand for the motor as well.

    Edit: Do you have any documentation that describes what the fault code means.
     
  15. sgtlard

    sgtlard

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    Jun 24, 2020
    I’ll have to pop out and get a multiM
     
  16. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    Documentation says it’s a speed sensor issue. But the motor cuts out before any speed - so no speed to measure

    it’s an endex dcmd57 board
     
  17. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    Ok

    not sure I’m doing this right. Dmm set time dc 200v. No reading Without motor connected. Pressing start - I hear a click noise from the board and a red led get lit up

    with motor, reading jumps to about 20v, and falls back to zero


    Tried to read the pull ( change dmm mode to amp, move the connector and set to amp ) no reading.
     
  18. pharaon

    pharaon

    380
    6
    Oct 28, 2014
    To measure amp the dmm need to connected in series
     
  19. sgtlard

    sgtlard

    17
    0
    Jun 24, 2020
    Hi

    It was connected between the neg out onthe motor and the neg pin on the board.
     
  20. WHONOES

    WHONOES

    1,133
    312
    May 20, 2017
    Can you disconnect the motor and measure the resistance on its terminals. It is likely to be quite low so, you should proceed by turning on the DMM. Switch it to the lowest resistance range available. Connect the DMM leads together making sure you have very good contact. Make a note of the reading calling it "A".
    Now disconnect meter leads from each other and connect them to the motor. Wait a few seconds for the DMM reading to settle. Make a note of the reading, calling it "B".
    Now subtract reading "A" from reading "B" to give you the true value of motor resistance.
    Of course, it might be quite high rather than low.
     
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