Heidelberg M600 drop 5VDC after 10...20 seconds after boot

Discussion in 'Heidelberg Printing Presses' started by DmitryKhn, Feb 12, 2024.

  1. DmitryKhn

    DmitryKhn New Member

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    After turning on the M600, everything starts as usual. After a couple of seconds, the green LEDs on all EAK boards begin to blink. But later everything goes out - all EAK boards stop blinking. At this moment I check the DC voltage on the screws located on the back of both EAE boards, REE board, etc., and see, that there is no 5VDC voltage (24VDC exists).

    I was switch off/on M600 couple times and noticed that 5V is present immediately after switching on, but disappears after the green LED on the SEK-boards blinks once.
     
  2. DmitryKhn

    DmitryKhn New Member

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    One of EAK-boards was detected as faulty (using the “push/pull” method). M600 start and don't lost 5VDC, when this board is out of machine. Other side, fault repeat when this board inserted in any acceptable position (EAK1-XX, EAK2-XX)
     
  3. Beguin

    Beguin Senior Member

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    Good evening dear sir, what machine did you have and what is the problem?
     
  4. DmitryKhn

    DmitryKhn New Member

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    Machine - Heidelberg M600-4M (like this)
    Problem - machine stop response for any actions (buttons, etc.) after 20...30 seconds after switching on main power. (the check showed that the supply voltage of 5 Volts disappears in the cabinet with the cptronic circuit boards)
     
  5. PWInc

    PWInc Member

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    You have already identified the defective EAK as far as I understand then you should replace the defective EAK.

    Presswares Inc
     

  6. DmitryKhn

    DmitryKhn New Member

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    my boss asked me: "did you test this EAK at each ever slot? don't? so go and test exactly every slot!" when i set this EAK to (about) 14 to 16 position, machine no more lost 5 Volt supply. And after that i put this EAK in exactly same slot from which it was removed first time! machine start, don't lost 5 Volt and works till now. and i don't know, what it was...
     
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