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(Topic ID: 234457)

Cheap Power for Bally/Stern Displays - Will this work


By Cheddar

1 year ago



Topic Stats

  • 76 posts
  • 17 Pinsiders participating
  • Latest reply 1 year ago by Pbpins
  • Topic is favorited by 6 Pinsiders

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    There are 76 posts in this topic. You are on page 2 of 2.
    #51 1 year ago

    First time posting pics.... Has all schematics for the display tester and displays a home made glass tester, and some personal notes about what to do if...

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    #52 1 year ago

    That is super cool. Thanks for posting it

    2 months later
    #53 1 year ago

    Finally started using my tester. Works amazing on LEDs, but on my high voltage I'm having something weird happen on the displays.
    Using a Nixon clock power supply putting out 200 v DC.
    Keep getting a voltage jump? On the far left digit on all 5 displays I tested.

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    #54 1 year ago

    I have seen that too. I keep my power around 180VDC so I don't see it as often

    #55 1 year ago

    Cool I'll try a little lower voltage will have to wait a few weeks. I fried my power supply hooking up my 12v dc backward.

    #56 1 year ago

    Hi guys,

    I would avoid using 200VDC as they are normally working with 170-180VDC

    I think also che some glasses are getting old enough and this could also indicate that they are getting tired and cause those effects.

    Thanks anyway for feedback.
    Gianfri

    #57 1 year ago
    Quoted from gianfri:

    Hi guys,
    I would avoid using 200VDC as they are normally working with 170-180VDC
    I think also che some glasses are getting old enough and this could also indicate that they are getting tired and cause those effects.
    Thanks anyway for feedback.
    Gianfri

    Cool definitely try that. Loving the tester. Great work.

    #58 1 year ago

    Not sure I get why a tester is needed for these plasma displays. For a sound board or SDB I get it. Why not just plug into a working game and run the display test? I have done it this way for hundreds of displays. Never needed another tester.

    #59 1 year ago
    Quoted from jj44114:

    Not sure I get why a tester is needed for these plasma displays. For a sound board or SDB I get it. Why not just plug into a working game and run the display test? I have done it this way for hundreds of displays. Never needed another tester.

    I don't currently have a Bally or stern at my house to test them. I've still repaired a bunch with it.

    #60 1 year ago
    Quoted from jj44114:

    Not sure I get why a tester is needed for these plasma displays. For a sound board or SDB I get it. Why not just plug into a working game and run the display test? I have done it this way for hundreds of displays. Never needed another tester.

    Options are a good thing and you get full access to the display board on the bench for probing.
    I haven't got a tester set up as yet but for anyone repairing lots of displays I'd think reducing female display connector wear in their machines is a good idea.

    #61 1 year ago
    Quoted from jj44114:

    Not sure I get why a tester is needed for these plasma displays. For a sound board or SDB I get it. Why not just plug into a working game and run the display test? I have done it this way for hundreds of displays. Never needed another tester.

    I think you have already got the answers but in general, with any kind of tester like this one:

    - you don't need to have an alive machine to test one or more displays;
    - you can confortably sit in front of your test bench and do test + repair without standing up and down to go back to the machine;
    - in case of nasty short or damages you avoid killing you working machine;
    - when reparing a display you need to switch it on several times before having it good, this means connectiong it to the pinball machine as many times as;
    - this tester runs a series of tests which are intended to confirm that all digits and segments are ok, in a normal machine you have to power on, wait, move to tests program, etc etc.;
    - this tester goes straight to the point.

    Now, before having it, I was doing exactly like you said, but I was tired of using my machines as test benches, keeping them constantly open and looking hugly.

    Getting your feedbacks and positive comments makes me really proud because it looks like I produced something really useful not only for myself.

    #62 1 year ago

    just been tinkering with the NCH6100HV high voltage module i bought from ebay. Great value for little money to the UK from China
    Set it to 170V and now just waiting for Gianfri display tester to fall through my letter box!
    Cheers Bob

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    #63 1 year ago

    Hi Bob,

    I'm assembling the new testers after my Easter holidays, I'll ship it to you in the next days.

    Regards
    Gianfri

    1 week later
    #64 1 year ago
    Quoted from gianfri:

    Hi Bob,
    I'm assembling the new testers after my Easter holidays, I'll ship it to you in the next days.
    Regards
    Gianfri

    thanks Gianfri
    turned up the other day, thank you

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    #66 1 year ago

    Thinking about getting gianfri 's display tester and looking into a stepper to drive HV (ebay.com link). What do you use/connect into the stepper for the 12-24V DC In? I haven't been able to find any pictures showing how that part connects.

    #67 1 year ago
    Quoted from Mathazar:

    Thinking about getting gianfri 's display tester and looking into a stepper to drive HV (ebay.com link). What do you use/connect into the stepper for the 12-24V DC In? I haven't been able to find any pictures showing how that part connects.

    I use one of these: https://www.mouser.com/ProductDetail/MEAN-WELL/RQ-50B?qs=V9a8iPeg90yfVL7CjCrVgQ%3D%3D

    and just stripped some wire of the end of a jumper and put it in the connectors on the nixie board.

    #68 1 year ago
    Quoted from Cheddar:

    I use one of these: https://www.mouser.com/ProductDetail/MEAN-WELL/RQ-50B?qs=V9a8iPeg90yfVL7CjCrVgQ%3D%3D
    and just stripped some wire of the end of a jumper and put it in the connectors on the nixie board.

    Interesting....mouser is out of stock (7 weeks) but it's on Amazon for $20. Did yours come with the wall plug cable or did you have to fashion your own? Amazon doesn't list any "accessories" that get packaged with it.

    #69 1 year ago
    Quoted from Mathazar:

    Interesting....mouser is out of stock (7 weeks) but it's on Amazon for $20. Did yours come with the wall plug cable or did you have to fashion your own? Amazon doesn't list any "accessories" that get packaged with it.

    I used an old pc power cord. Yeah it didn't come with anything

    #70 1 year ago

    Hello all,

    I think you can find several models with several budgets.

    this is working in my bench and it's quite cheap:
    http://www.aliexpress.com/item/DC-DC-8-32V-To-45-390V-High-Voltage-Boost-Converter-ZVS-Step-up-Booster-Module/32900346733.html

    2 weeks later
    #71 1 year ago

    Got my display tester board the other day - thanx very much, gianfri. I had a chance to play with it tonight and it's going to be very useful to me. Nice product.

    #72 1 year ago

    Thanks man!

    Having people happy makes me happy.
    It's a nice feeling when you realize that something you have produced is finally helpful for the others.

    Thanks for your feedback and have fun!
    Gianfri

    2 weeks later
    #73 1 year ago
    Quoted from Mathazar:

    Got my display tester board the other day - thanx very much, gianfri. I had a chance to play with it tonight and it's going to be very useful to me. Nice product.

    On your video it mentions the driver or level shifter transistors as likely suspect when a digit fails. FWIW in working on hundreds (maybe thousands?) of these display boards about 90% of the time it's the 300k Ohm resistor opening up. Just letting anyone reading this know there are a couple of known causes when a digit fails on these early Bally and Stern displays.

    #74 1 year ago
    Quoted from pinfixer:

    On your video it mentions the driver or level shifter transistors as likely suspect when a digit fails. FWIW in working on hundreds (maybe thousands?) of these display boards about 90% of the time it's the 300k Ohm resistor opening up. Just letting anyone reading this know there are a couple of known causes when a digit fails on these early Bally and Stern displays.

    Indeed - thanks for that pinfixer. I've repaired 23 displays since getting that display tester (so much easier!) and out of those 23, 8 got fixed by replacing resistors. All I had to do was follow the guide:

    http://stevekulpa.net/pinball/bally_disp6r.htm?fbclid=IwAR1bAGVVyt-YPDiuSx3rtf66OJOZ0XOv16wFBMp1ZqhsZF-7Cbr9F2yHxkA

    #75 1 year ago
    Quoted from pinfixer:

    90% of the time it's the 300k Ohm resistor opening up.

    I think you meant the 100k ohm resistors. They're the ones that fail.

    #76 1 year ago

    Love those old Bally brown box testers, had several years ago!

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