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(Topic ID: 271820)

Brand new Stern whitestar missing battery diode.


By Loganpinball

4 months ago



Topic Stats

  • 18 posts
  • 9 Pinsiders participating
  • Latest reply 3 months ago by Pin_Guy
  • Topic is favorited by 1 Pinsider

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    #1 4 months ago

    I was forced to buy a new whitestar board as my board was unrepairable, which sucks and I bought a brand new one. The game would not retain any settings. I started diagnosing the keep alive memory circuit and to my suprise there was no diode from the battery source connecting to the chipset. Never saw this before. I put in a diode and fixed the issue. It has voltage now and retains settings. Figured I would share this for anyone that has a memory issue.

    57DFF622-9AF7-49F7-B2F9-E9441C418F64 (resized).jpeg7AA7C908-35DA-4707-9E01-632AD99E5B06 (resized).jpeg

    #2 4 months ago

    Diode installed and it works fine. Confused as it did not have one installed in circuit?

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    #3 4 months ago

    The first thing I would do is get rid of that battery holder and batteries. The diode wouldn't have been necessary then.
    Install an NVRAM in the RAM socket and never look back.
    --
    Chris Hibler - CARGPB #31
    http://www.ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    #4 4 months ago
    Quoted from ChrisHibler:

    The first thing I would do is get rid of that battery holder and batteries. The diode wouldn't have been necessary then.
    Install an NVRAM in the RAM socket and never look back.
    --
    Chris Hibler - CARGPB #31
    http://www.ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    Ditto. I've seen many whitestar boards ruined by leaking batteries, and as you've probably discovered, this board isn't quite as easy to find as in other game systems, nor for a reasonable price

    #5 4 months ago

    the missing diode is a sign to install NVRAM. Guessing the original board was killed by the batteries.

    #6 4 months ago

    Another vote for NVRAM as it is like a 30 second install replacing that old RAM at U212 and removing the batteries. Removing the battery holder to ensure no batteries ever get installed back into the game....priceless!!

    #7 4 months ago

    Nope original board was destroyed by a 70 plus year old man fiddling with his machine. I even sent it out to Eldorado games, he has been able to fix boards above my level. And this is the first one he said everything is fried and I have been with him since the nineties. I posted this for anyone that might not be tech savy enough that might buy a new Stern whitestar board that has same issue. I get the ram chip option. But I move the batteries off the boards or do button battery.

    #8 4 months ago
    337D712A-6A51-4B6B-8816-CCD826E63BD2 (resized).jpeg
    #9 4 months ago

    Done.

    9E04A3CB-BC5F-4CFA-8885-5606EC3AD198 (resized).jpeg
    #10 4 months ago

    With respect...any batteries in the backbox can and will damage the boards.
    If they are mounted above the board, they can "drip" onto the boards.
    I've also seen leaky batteries create a "fog" in the backbox and corrode every board in the backbox. It's weird...but I've seen it at least a few times.
    Just an FYI...not saying anything more.
    --
    Chris Hibler - CARGPB #31
    http://www.ChrisHiblerPinball.com/Contact ... for board repairs
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    #11 4 months ago

    My TSPP has battery damage 10+ inches from the battery holder. The remote is better than on board, but its not far enough away.

    #12 4 months ago

    If you insists on using AA batteries at least use lithium. But the next owner may not be as knowledgeable about battery issues. Getting rid of them makes it more likely the machine survives long term.

    #13 4 months ago

    Jay,
    Thanks for posting.
    Chris,
    Your contributions are always appreciated!
    Rich

    #14 4 months ago

    Thanks Rich. I have never lost a board to batteries on any machine that I owned. I change them every year. However, because of this missing diode I got to exchange emails with a game designer that I am a fan of. And he was nice enough to answer questions I had with game developement. I would have never bothered him otherwise so it worked out. I really posted this so if someone bought a new stern board with memory issues maybe this would help them see the problem right away. Diode is right below battery pack in picture. Some collectors are not tech savy, but the post has pictures and would be easy to understand.

    #15 4 months ago

    I use remote battery holders all the time for Williams games with soldered in RAM chips. Never had an issue and my games run 24/7 on location.

    #16 4 months ago

    I think most of the other pinball techs that posted here are questioning why any effort would be put forth to make it work on batteries in the first place since NVRAM is a drop in replacement in this board and can be done by anyone, even a collector with no skills and no soldering equipment.

    #17 4 months ago

    I can answer that. I do not have any nvram chips in my house. I do however have diodes. And I wanted to play the game that day with saved settings. Less than a buck to fix. And less than five minutes to install diode and remote battery pack. Enabling me to play the game with saved settings and scores over ordering a chip and waiting a few days to install it then play the game. No other reason. Its really simple. Not being weird or rude, just saying it was a post to help anyone in the future with a new whitestar board that does a search might have same issue. I was only trying to post a helpfull topic for someone. Not a debate on nvram over batteries which this turned into.

    #18 3 months ago

    I've never purchased a replacement Whitestar board and just out of curiosity, did the replacement board you purchased come with any of the socketed IC chips or did you have to provide these yourself?

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