(Topic ID: 263727)

Addams: weird behavior on startup - seen this before?


By Bospins

4 months ago



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  • 17 posts
  • 5 Pinsiders participating
  • Latest reply 4 months ago by mbwalker
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    #1 4 months ago

    I was finishing up my led conversion and installation of color dmd and led ocd boards.

    Machine was working great, then I noticed the color dmd went out. Strange...looked and saw the 12v secondary fuse blew. (F116)

    Replaced it, then I got this wacky behavior on startup...see video:

    I did the basic stuff, visually checking fuses, reseating connectors...all fuses seemed ok (although I didn’t check continuity with my dmm). No change.

    I have done zero board work. I replaced U18 with a fresh ROM from Matt because it was causing an error on startup, which cleared once it was replaced. The replaced chip was an EEPROM.

    U6 is also an EEPROM. I have a replacement from Matt. Could it be this would fix it?

    Just checking here first for any bright ideas because I don’t want to fry any chips.

    A basic shot of the backbox inside is below...its busy at the bottom because of the 2 Ocd boards. Game was playing great for a dozen games or more with this configuration.
    E394A65D-CC09-4FA7-B04B-8D4F0C5CA6CF (resized).jpeg

    #2 4 months ago

    Your going to have to recheck all your work, and meter your fuses...check 12VUR fuse first. I'm thinking you already knew this would be the first response.

    #3 4 months ago

    Looks little your CPU isn’t booting, check that U6 is inserted correctly for orientation and that all pins are in properly.

    #4 4 months ago

    pin_guy of course I made one mod at a time and played multiple games after each mod, and didn’t have any issues until this one. I’m hoping I don’t have to undo that work but of course I will if it comes to that.

    jchristian11 i suspect the cpu as well, especially since the other replacement chip went bad. But I don’t want to fry the replacement so wanted to check here if that was the likely cause first before blindly replacing parts.

    The cpu board itself is a rotten dog and looks in great shape.

    #5 4 months ago

    This rings a bell, at least with regards to the fuse blowing, not so much with the odd behavior. Make sure you don't have any extra accessories attached to the 12V line. I had a JD with a bunch of extra lights and the fuse also blew on mine after installing the colorDMD (LCD). I also ran the eeproms from Matt (btw, great seller) without issues, albeit a JD not AF.

    Got a meter to start checking power supply voltages?

    #6 4 months ago

    Hm...I have 2 led strips on that 12v line. Guess I’ll remove those

    ...and replace U6 and hope for the best

    #7 4 months ago
    Quoted from Bospins:

    I made one mod at a time and played multiple games after each mod, and didn’t have any issues until this one.

    ahhh good call.

    DO you have a Khar board on your CPU?

    #8 4 months ago

    No khar board.

    Replaced U6, removed light strips from 12v...no change.

    I am out of my depth but sure to learn something!

    #9 4 months ago
    Quoted from Bospins:

    I am out of my depth but sure to learn something!

    Cool, I love that kind of attitude!

    Would you mind taking a video of the backbox boards when you power on the machine so I can see what its doing?

    #10 4 months ago
    Quoted from Bospins:

    No khar board.
    Replaced U6, removed light strips from 12v...no change.
    I am out of my depth but sure to learn something!

    Just fix one thing at a time (i.e. the 12V load)! You'll get there, lots of good help around these neck of the woods.

    #11 4 months ago

    A little progress...removing j601 has the machine *almost* go into attract mode...the dmd is still scrambled (as it should be I think) but the controlled and GI lamps come to life, and the thing / bookcase cycle as expected.

    #12 4 months ago

    Well, are you all ready for a supremely unsatisfying conclusion?

    After my j601 discovery I decided to clean the pins with deoxit and reseat the cable a few times. In fact I did that with all the cables.

    Machine is working as expected now.

    My bookcase optos are not registering but I know that is an issue with the wiring harness because when I unplug and replug it works for awhile.

    Well that was a fun 2 hours!

    #13 4 months ago

    What's an OCD board?

    Obviously, I'd focus on anything you touched during the install if it was working prior.

    Edit: Oops, you just fixed it!

    #14 4 months ago

    You get to play with all your new toys now

    #16 4 months ago
    Quoted from Pin_Guy:

    You get to play with all your new toys now

    This is what life is all about isn’t it?

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