POLAR MOHR 78 ES Control panel and display problem

Discussion in 'Cutters and Trimmers' started by Elwasila, Aug 28, 2014.

  1. Elwasila

    Elwasila Member

    Joined:
    Aug 2014
    Messages:
    5
    Location:
    Khartoum, Sudan
    Dears
    I hope that you are doing fine. would to ask for a support for a problem in display of polar Mohr 78 es
    After open the main Program of Data Display. then The machine start automatically change the windows without of my order. I can not control the machine because the windows are moving steadily and fast. In some cases, moving the back guage
    i checked the keypad and display they are ok(No button compressed)
    Best regards
     
  2. Coloured paper

    Coloured paper Senior Member

    Joined:
    Oct 2012
    Messages:
    258
    Location:
    Germany
    Hi Elwasila!

    Are you really sure the keyboard is okay? There is a test possible. On the electronic board behind the keyboard is a little push button. This switch will activate the button test.
    You open the key board, switch the machine on and push the little black push button. Another LED will be active to show the button test is activated. If you push a keyboard button you get a beep. In some software version a get second result in the moment you release the button. In this way you can check all buttons. To deactivate the button test you have to switch off the machine.

    Otherwise I can only think of a wrong power supply. At the electronic board behind the keyboard you have some green plugs. The biggest green plug (500) is for the power supply. You between pin 1 and 4 (the first and the last pin) 5V d. c. The tolerance is 5.00 V d. c. to 5.10 V d. c. Everything lowered than 5.00 V d. c. may give trouble. But in this case you normally get a reset for the keyboard computer and not a malfunction. In other words I believe in a broken push button of the keyboard.

    Coloured paper
     
  3. Elwasila

    Elwasila Member

    Joined:
    Aug 2014
    Messages:
    5
    Location:
    Khartoum, Sudan
    hello C p

    When i pushed the little black push button, the test led is activated and turned into a non-active at the same time, also it Emitting a beep not stop When you press the little black push button.(So I can not press the a keyboard button )
    the power supply is 5.12 v dc


    Best regards
     

  4. Coloured paper

    Coloured paper Senior Member

    Joined:
    Oct 2012
    Messages:
    258
    Location:
    Germany
    Hi Elwasila!
    This means the keyboard is broken.
    Either one button is already activated before you start the test or the electronic of the keyboard itself is broken.
    Before changing the keyboard I would dismantle the electronic board. In other words you take the front plate off. Afterwards you do the test again.
    If all this fails it is time to buy a keyboard.

    Coloured paper
     
Loading...