(Topic ID: 242158)

DumbAss test and reproduction PCBs

By DumbAss

4 years ago


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  • 1,538 posts
  • 230 Pinsiders participating
  • Latest reply 12 hours ago by ChrisHibler
  • Topic is favorited by 432 Pinsiders

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    #595 2 years ago

    Hey everyone

    Victor squeezed me into his busy sxhedule & hooked me up w/ a new System 11b board for my Police Force. I gently pulled processors (U15/U24) & ROMs (U21/U22/U26/U27) from the original board & got them in the new board. once I stuck it into the machine & turned it on, adjust error, unplayable, & wired sounds. I quickly turned it off w/o trying to go through the menu.

    how can I tell if I put the processors or roms in upside down? they fit either way so maybe I have 1 of them flipped around.

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    20211127_215208-labled (resized).png20211127_215208-labled (resized).png

    #597 2 years ago
    Quoted from Juicerc51:

    There is a half circle on one end of the picture on the board you are supposed to match the round indent on the chip to that same side. I cant see the board picture in the pics you provided so I cant say they are backward or not as I am not familiar with that board set.

    thanks! I hadn't even noticed those marks. going thru my before & after pics I can see 5 out of 6 are good. I'll have to look closer at U24 to make sure but based on all the others, I'm going to guess it's good too.

    ----------

    just checked U24 too & thankfully it's not upside down either. thanks again

    #603 2 years ago
    Quoted from Robotworkshop:

    The windows on the EPROM chips should really be covered. If they are exposed to light for too long it can start erasing bits. Even if one bit flips and reverts to a 1 it can cause issues. Would help to verify the contents of the ROM chips and if corrupt then erase and reprogram.

    good to know. I found the stickers & will reattach them. as for the EPROMs, I don't own a programer. searching the site I see lots of olds posts about the GQ-4X4. is this still the go to unit or are the cheaper ones fine? I'll almost never use it. this may be the 1 time.

    3 months later
    #715 2 years ago

    I wanted to drop in & say thank you to Victor for my System11B board for Police Force. He got it to me quickly, really quick. I didn't "need" it for christmas but it sure was nice of him to make sure I got it in the short time available at a very busy time of year. (above & beyond) as you can see by all the pics in this thread, the board is beautiful. mine had a small issue & for all I know I caused it (I am a bit of a bull in a china shop) but victor helped thru numerous emails & asked me to mail it back so he could see for himself. i got it back ASAP in perfect working order.

    then I should also say thanks to the pinsiders. even w/ the new board fixing my battery acid damage, I still had audio issues. more that 1 person pointed out missing stickers leaving exposed sound / speech roms which could be an issue or become one. I replaced them but it didn't fix my speech issue. after searching the forum for people w/ similar issues I replaced the 2 CPUs (only 1 needed to be replaced but I was done fucking around) & she's 100% now. clean displays, speech, & music all working properly again!

    so long story short, pinside saved the day & I can't recommend working w/ DumbAss enough. it was a pleasure. thanks

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