Polar 76EM Keyboard

Discussion in 'Cutters and Trimmers' started by Bradley Crawford, May 16, 2019.

  1. Bradley Crawford

    Bradley Crawford Member

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    None of the keys are working on the keyboard after what may have been static discharge from cutting synthetic stock. The display shows proper position but there is no way to program. There is 5V and 9V being supplied to the board.
     
  2. CHOCK

    CHOCK Senior Member

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    Hi
    is there the +5 and+9 in tolerance in 5% ??? example if you get +5.6Vdc out of tolerance, repair or replace, and similar.
    Lets check this, please, if there are try to clean the connectors very well, from oxide, and dust.
    2) Look for dry and cold joint solder, and reheating the boards.
    3) if everythings is o.k , time to replace the Keyboard board
     
  3. CHOCK

    CHOCK Senior Member

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    attached example for solders.
     

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  4. Bradley Crawford

    Bradley Crawford Member

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    Thanks you so much for the quick response. There is 4.95v and 9.1v at the test points. The display is functioning and I have reworked the solder joints for the ribbon cable and power supply connectors. I was suspecting either the KDI board or the keyboard board but was having a difficult time finding a replacement. Thanks again.
     

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  5. CHOCK

    CHOCK Senior Member

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    Hi.
    Great you must replace the Keyboard board.
    I can supply , let me know the 1) serial number machine 2) Model 3) Part number
     
  6. Bradley Crawford

    Bradley Crawford Member

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    Model: Polar 76 EM , Machine # 6061321, Board # 019970.
     
  7. CHOCK

    CHOCK Senior Member

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    ok i will send you by Monday the quotation.
     
  8. Print Service

    Print Service Member

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    Does the backgauge move to position when you enter a number?
     
  9. Godwill

    Godwill Member

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    Hello am having the same problem how much is keyboard and card KDI
     
  10. CHOCK

    CHOCK Senior Member

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    ok, will quotate

    Give me the delivery country address for calculate the freight to your country

    Let me know quickly.

    Blessing.
     
  11. Godwill

    Godwill Member

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  12. CHOCK

    CHOCK Senior Member

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    Let me know the 1) serial number machine 2) Model 3) Part number+4) delivery country address for calculate freight +5) email for to send you the complete quotation
     
  13. Godwill

    Godwill Member

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    And one of the IC in the card has a swollen part can it be the cause.....i can't even calibrated
     
  14. CHOCK

    CHOCK Senior Member

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    can be a good Possibility.

    Try it to replace, after first test the power supply, if is in good Tolerance. o.k??

    Measure the power supply to the input primary in the main transformer, maybe you need to install Regulator Voltage Transforme from Polar.!!
     
  15. Godwill

    Godwill Member

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    Also cardLS have an issue error led 25 is On
     
  16. Godwill

    Godwill Member

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    How can i go about that
     

  17. CHOCK

    CHOCK Senior Member

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    measure power supply in all CU unit, as i did indicate you , can be a problem with the Input voltage in the machine
    maybe you need to install Regulator Voltage Transformer from Polar, since that are affecting electronic boards.

    1)measure the voltage in LS +24vDC ??

    2) Test the connector CU4, can be some interruption or bad contacts, or dirty, or bent pins or corroded , clean it.very well, loo for dry +colder joint solder.

    3) is everything is o.k , the only way is replace the card LS.
     
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