Polar em won’t turn on

Discussion in '4-Color Offset Presses +' started by Mouzdahir, Feb 23, 2021 at 5:15 AM.

  1. Mouzdahir

    Mouzdahir New Member

    Joined:
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    Location:
    Morocco
    Hi everyone pls help
    I have a problem with polar 76 em ,first when i switch the key on the motor turn normally then i press the green button everything it light up all the boards in the machine are successfully operated (when i switch any button i see led light up)
    I measured in the keyboard 9v and 5v but the keyboard no longer displayed !!
     
  2. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    1,781
    Location:
    Managua,Nicaragua
    Hi sir:

    Please make this measure:
    1)Key-board and
    display BT: + 9 Volt D.C.
    Tolerance: 8,4 - 9,6 Volt D.C.

    2)
    Key board BR: + 5 Volt D.C.
    Tolerance: 5,08 - 5,12 Volt DC.


    If the tolerance is out of Order you must repair the +9vdc or +5vdc.

    If the tolerance is o.k the Display board, is faulty, Replace or repair.

     
  3. Mouzdahir

    Mouzdahir New Member

    Joined:
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    Messages:
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    Location:
    Morocco
    Yes sir after measurement i get 8,94 in 9v
    And 5,03 in 5v
    So what should I repair
     
  4. CHOCK

    CHOCK Senior Member

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    Location:
    Managua,Nicaragua
    The dry+ colder joint Solder.

    Blessing.
     
  5. Mouzdahir

    Mouzdahir New Member

    Joined:
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    Messages:
    3
    Location:
    Morocco
    Thank you sir
    I tried this but still not working !
     

  6. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    1,781
    Location:
    Managua,Nicaragua
    Replace Display please.

    Blessing
     
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