Polar 76 EM problem

Discussion in 'Cutters and Trimmers' started by saso, Dec 8, 2021.

  1. saso

    saso New Member

    Joined:
    Mar 2021
    Messages:
    4
    Location:
    Slovenia
    HI
    i have a problem with my 76 em. Machine turns on, motor working. No error on display. Allso the backgauge working and gets to the calibrating point.
    When i press both cut buttons, nothing hapens. Just the digital dot starts blinking. no error. Allso no sound from any relay like it was before..
    The clamp does not move when i press the buttons, but it moves when i press the foot pedal.

    LED STATE WHEN I TURN ON THE MACHINE:
    HK
    V 1, 3, 4, 6, 7, 12 ON

    KK
    V 1 ON

    IAR
    V 3, 5 ON

    WHEN I PRESS BOTH BUTTONS
    HK
    V 1, 4, 8, 9, 12 ON (the V3 goes off after all other has blinked)
    V14, 17, 18 BLINKS ONCE

    KK
    V 1 ON
    V 2, 3 BLINKS ONCE

    IAR
    V 3, 5 ON
    V 1, 2, 23 BLINK ONCE
     
    Adane Forsim likes this.
  2. Gintaris L

    Gintaris L Member

    Joined:
    Mar 2022
    Messages:
    10
    Location:
    Lithuania
    Hello, what you have found out about this problem ?
     
  3. saso

    saso New Member

    Joined:
    Mar 2021
    Messages:
    4
    Location:
    Slovenia
    HI, it was a bad MHY board.
    You have to check the V4 led on the IAR board. If it is not lit up, then you have a faulty MHY board.
     
  4. Gintaris L

    Gintaris L Member

    Joined:
    Mar 2022
    Messages:
    10
    Location:
    Lithuania
    You mean MHS board with K22b and K22a ?
     
  5. saso

    saso New Member

    Joined:
    Mar 2021
    Messages:
    4
    Location:
    Slovenia
    yes. Correct is MHY board, but some sax MHS... I have one if you need.
    But first check the V4 on iar.
     

  6. Gintaris L

    Gintaris L Member

    Joined:
    Mar 2022
    Messages:
    10
    Location:
    Lithuania
    Thank you, I'll try to test it.
     
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