POLAR 115EM - Monitor

Discussion in 'Cutters and Trimmers' started by Ahmed Mahrous, Feb 4, 2024.

  1. Ahmed Mahrous

    Ahmed Mahrous Member

    Joined:
    Nov 2023
    Messages:
    10
    Location:
    egypt
    Hi everybody,
    I have a problem with SK board, I found a damaged Transistor, so i replaced it with another one but after I run the machine it worked for half hour and the transistor damaged again. Have any idea ?
    WhatsApp Image 2024-02-04 at 4.51.15 PM.jpeg WhatsApp Image 2024-02-04 at 4.51.25 PM.jpeg
     
    Ahmed Mahrous, Feb 4, 2024
    #1
  2. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    597
    Location:
    Kolding-Denmark
    Hello Ahmed,
    This transistor controls Y315. Check the coil resistance first. It should be around 60-80ohms with no ground leakage. Also be aware that you are using the correct BU426A package, the back side should be fully isolated from the middle pin. Use silicone pad instead.

    Good luck
     
    Mathew, Feb 4, 2024
    #2
  3. Ahmed Mahrous

    Ahmed Mahrous Member

    Joined:
    Nov 2023
    Messages:
    10
    Location:
    egypt
    Hello Mathew,
    Thank you so much I found the coil and it's damaged.
     
    Ahmed Mahrous, Feb 5, 2024
    #3

  5. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    597
    Location:
    Kolding-Denmark
    You are welcome :)
     
    Mathew, Feb 5, 2024
    #4
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