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Thread: Amiga 4000 from scratch

  1. #1
    Amibayer! riri's Avatar
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    Default Amiga 4000 from scratch ... Update

    Hi
    This weekend I started the arduous task of transplanting the components of a motherboard from my A4000 to a new replica motherboard.
    Being a hobbyist and not a professional, but so far things are going well.
    I have to keep thinking positive and think I can do it.
    So far I have already completed the bottom of the plate and started the top.
    The biggest difficulty was the connectors, with so many pins to unsolder.
    In the end, maybe it works ...

    Some photos:

    https://www.imgpaste.net/image/Uofoe
    https://www.imgpaste.net/image/UoyTX
    https://www.imgpaste.net/image/UoMg2
    https://www.imgpaste.net/image/Uo4eb
    https://www.imgpaste.net/image/UovFw
    https://www.imgpaste.net/image/UoZS7
    https://www.imgpaste.net/image/Uo1l3

    Regards
    Last edited by riri; 27th January 2021 at 20:56.
    - Amiga A500 Rev 8a1 (not the plus) 1MB + EXT Gotek Drive
    - Amiga CD32 + TF330 + CDTV Keyboard
    - 2x Raspberry Pi 3 with UAE emulator

  2. #2
    Amibayer! timtheloon's Avatar
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    Default

    Good luck riri you are a braver man than most.

    I was lucky enough to have John "Chucky" Hertell transplant a busted A4K motherboard to a red Acill PCB like yours. maybe contact him if you run into any issues
    Last edited by timtheloon; 11th January 2021 at 21:24.
    Got too many Amigas, Think I gotta problem


  3. #3
    Amibayer! riri's Avatar
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    Hi , thanks .
    I hope I don't need to contact "Chucky" , that will be sign of a working motherboard at the end...
    - Amiga A500 Rev 8a1 (not the plus) 1MB + EXT Gotek Drive
    - Amiga CD32 + TF330 + CDTV Keyboard
    - 2x Raspberry Pi 3 with UAE emulator

  4. #4
    Amibayer! riri's Avatar
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    Hi
    Now in the final stretch, I'm waiting for the socket of the super buster and some resistors.
    It has not been very easy, but not impossible to achieve.
    Next week will be the result test...

    https://www.imgpaste.net/image/jSkRS
    https://www.imgpaste.net/image/jS6QN
    https://www.imgpaste.net/image/jSB3F
    Last edited by riri; 17th January 2021 at 23:11.
    - Amiga A500 Rev 8a1 (not the plus) 1MB + EXT Gotek Drive
    - Amiga CD32 + TF330 + CDTV Keyboard
    - 2x Raspberry Pi 3 with UAE emulator

  5. #5
    Amibayer! timtheloon's Avatar
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    Looks good well done so far how have you found it soldering the IC's? so many pins so close together arghhh
    Got too many Amigas, Think I gotta problem


  6. #6
    Amibayer! riri's Avatar
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    Thanks!
    With a lot of patience and a lot of flux...and many bad words...
    at least I practiced a lot ...
    Last edited by riri; 17th January 2021 at 23:30.
    - Amiga A500 Rev 8a1 (not the plus) 1MB + EXT Gotek Drive
    - Amiga CD32 + TF330 + CDTV Keyboard
    - 2x Raspberry Pi 3 with UAE emulator

  7. #7
    Amibayer! riri's Avatar
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    Default Update

    Hi

    After the missing parts arrived, I finished the motherboard, but I still can't celebrate, because everything seems to be working except the image.
    The black image appears and I can see shadows if I look in a lower angle.
    Last edited by riri; 27th January 2021 at 20:55.
    - Amiga A500 Rev 8a1 (not the plus) 1MB + EXT Gotek Drive
    - Amiga CD32 + TF330 + CDTV Keyboard
    - 2x Raspberry Pi 3 with UAE emulator

  8. #8
    ori1a's Avatar
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    It is PCB issue, L500 is not connected.
    Fix:

    https://photos.app.goo.gl/VG5G7AbTXeMmTZpr6


    Wysłane z mojego SM-A715F przy użyciu Tapatalka

  9. #9
    Amibayer! riri's Avatar
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    HI
    Thanks for the information, but I already found the solution, as shown in this other topic of mine:
    Amiga 4000 Replica Motherboard from "ACILL" finished and black screen . (amibay.com)


    If you placed 1ohm resistor on r465 that wiring work was not needed.
    - Amiga A500 Rev 8a1 (not the plus) 1MB + EXT Gotek Drive
    - Amiga CD32 + TF330 + CDTV Keyboard
    - 2x Raspberry Pi 3 with UAE emulator

  10. #10
    ori1a's Avatar
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    Regarless the resistor I decided to use wiring to L500 to make L500 do its job of power stabilization even if not really needed

    Wysłane z mojego SM-A715F przy użyciu Tapatalka

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