Sega Universal Upright conversion

Discussion in 'Retro & Arcade' started by mR_CaESaR, Feb 16, 2019.

  1. Vanne

    Vanne Member

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    Wow !! This is amazing, thanks for documenting the whole thing. :)
    AMAZING stuff.
     
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  2. MUTMAN

    MUTMAN Member

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    great work there mR_CaESaR
    I dont know how much work the pi has to do, but that case (i have two) has zero airflow.
    grab a $2 heatsink for the pi and pop off one or both of the side covers (or the top if not concerned about dust settling)
     
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  3. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    The pi doesn't do much.. it's just used to load the game onto the DIMM.

    That said, I'll remove the side covers
     
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  4. elvis

    elvis Old school old fool

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    Bugger all. Pushes a file via a network protocol, goes to sleep.

    Could be done on much lower end hardware, but ironically enough a Pi is a simpler/cheaper way to do it due to mass production.
     
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  5. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    I could've used an original pi or even the 2, but I wanted the in built wifi just because I didn't want to be scrolling through on an adafruit 16x2 LCD :) (just doesn't make sense to buy a pi1 then adafruit lcd)
     
  6. Vanne

    Vanne Member

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    Awesome, one day you guys should do a proper complete write up on the Naomi, I love how close it is to the DC and the quality of the games. Very, very awesome!!!
     
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  7. MUTMAN

    MUTMAN Member

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    in that case you should be able to get away with it closed up on all sides :thumbup:
     
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  8. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    I don't play games! I just tinker and make stuff in a workable state then I move on :D :D

    That said, this project has been the longest and has had the most work involved. I was luck in that the whole internal wiring was still intact and operational (except the monitor)
     
  9. elvis

    elvis Old school old fool

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    This made me laugh, then cry, because I do it too.
     
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  10. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    Story of my life.. My Mrs always says "are you actually going to play?" haha
     
  11. Vanne

    Vanne Member

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    Lol I guess we all do this to a certain extent. Lol. either way, I really like the progress and the write up you compiled together.
     
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  12. FIREWIRE1394

    FIREWIRE1394 Member

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    Yeah, massive Kudos for this project.

    Can’t wait to see it finished and the final picture next to the first, and of course the next project.

    Have a virtual hi five and beer!!
     
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  13. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    And... The restoration has taken another dive! :(

    As I was trying to sort out the piforce, I noticed the image go funny - it became large and then the image pinch and became like an hour glass (not that bad, but concaved)

    Shortly after when the Naomi rebooted, the signal wasn't present (but the sound was) and it sound like the monitor was trying to turn on.

    And then the smell.... There was an electrical smell that was very present in the air..

    Back to square 1 looking for a 31khz monitor. I'll disassemble the chassis and try and find some sort of identifier to see if I can get a replacement as I know Jomac doesn't really fix 31khz chassis.

    Hopefully I can also find the "burnt" section and see what the damage is.

    I'd love to know how this happened, the monitor and chassis was secured, no wires touched (that I could tell anyway) and the input voltage was coming out of the transformer - if it was going to fail due to incorrect input voltage, I would've thought this would have occurred earlier.
     
  14. qwertylesh

    qwertylesh Member

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    Damn dude.

    I hope u find the root cause
     
  15. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    Doubt I ever will... :(
     
  16. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    In light of issue that occurred, on a good note, I fixed the my piforce issue I was having - no idea how, but loading bins is now possible on a web browser!

     
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  17. OP
    OP
    mR_CaESaR

    mR_CaESaR Member

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    Chassis pics

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    Some impedance readings (hopefully this is correct)

    [​IMG]

    [​IMG]
     
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  18. ShaggyMoose

    ShaggyMoose Member

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    Isn't it likely to be a single component?
     
  19. qwertylesh

    qwertylesh Member

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    Also how old was the tube, are you sure the smell is definite component failure? Isnt it possible the issue and smell are unrelated, when i got my arcade unit it was unused for a long time and upon powering it up a lot of dust burnt off the back of the electron gun, it smoked and smelt but the hardware was fine
     
  20. breech

    breech Member

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    An hourglass / vertical line fault is called horizontal collapse. If you're ok with a soldering iron try refresh any crusty solder joints. Start with the 4 in the middle, reflow the circle of flyback pins and concentrate around the flyback where the transistors are mounted to the heatsink. Look for burnt components around there. Check on aussiearcade etc for similar faults.
     
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