SM 102 Electrical Fault

Discussion in 'Heidelberg Printing Presses' started by youngBOSS, Nov 13, 2019.

  1. youngBOSS

    youngBOSS Member

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    Hello Seniors,
    I am having a challenge with a 1992 SM102-5P and needs your inputs.
    Whiles working, it developed a fault causing the machine not to boot past the HIEDELBERG logo. After diagnosis, I disconnected the SUM2 which is the signal amplifier for the front lay sensor before the machine could boot and be ready for running.

    Yet, it’s not working smoothly. Inching both forward and backward are intermittent and sometimes will only move after several pressing of the nub.
    When starting to run, the bell may sound for a second time before it moves.
    I recorded the following errors as well. Please help me rectify this fault.
     

    Attached Files:

  2. CHOCK

    CHOCK Senior Member

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    Hi sir:
    Here your failure:
    1) EAK: FDFF: Failure to production testing in I / O- HF.
    2)DSK :7FFC: Error data transmission. State error in reception.
    3)NTK-BRX:7FFE ;Lack of power DC 5V ( on secondary side of NTK ). Replace the electronic board or repair.
     
  3. youngBOSS

    youngBOSS Member

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    Thank you sir for you interpreting these errors for me. I think the missing 5volts could be key in resolving the fault. I will work on that.
     
  4. CHOCK

    CHOCK Senior Member

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    ok
     
    Last edited by a moderator: Nov 14, 2019
  5. youngBOSS

    youngBOSS Member

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    As per your suggestion and the errors recorded, I have tested all the dc voltages from the NTK Power boards and all seems to be present: three dc24v voltages and three dc5v voltages. I have also changed all the NTK boards after checking the voltages, yet the errors still remain the same.
    I’m still working on finding the fault. Any further suggestions please?
     
    Last edited: Nov 16, 2019
  6. CHOCK

    CHOCK Senior Member

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    Please send me the Pics for any voltages in Vdc, need to be sure if there are Voltages are in Tolerance.

    Since if there are NOT, you can exchange all Electronic Board, and nothing will work properly.

    Remember the power supply is the blood in electronic= like the blood in the human being.

    However look for: a) cold solder joint b) dry colder joint in all electronic board c) edge connector, clean very well with special contact spray , d) loose connector e) loose wire d) broken wires e) oxide wires terminals.
     
  7. Waqas_zahid

    Waqas_zahid Senior Member

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    Can the machine run? Once it runs after trying for several times does it stop on its own?
     
  8. youngBOSS

    youngBOSS Member

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    Yes. It runs when I exchange EAK on unit 1 and doesn’t stop on it’s own.
    But with the SUMs 1 connected. It wouldn’t boot past Hiedelberg logo. I tested SUMs on a different machine and it’s working fine.
    However, when original EAK on unit 1 is in position, machine flashes an error as one Safety nub is being pressed and sounds as if being inched.
     
  9. youngBOSS

    youngBOSS Member

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    Many thanks Sir.
    I will provide you with the exact dc voltages: 5v and 24v.
    I will clean all connected plugs as well.
     

  10. CHOCK

    CHOCK Senior Member

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    Ok Sir.

    Tomorrow Tuesday 19 , i am flying to come back to my country Managua, Nicaragua Central America.

    After visiting to my daughter and my descendy living in USA, by 4 weeks.

    Will until Thursday.
     
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