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Thread: New to Restoring - 1970's Nishijin "Circuit"

  1. #1
    Tokie Owens CarCynic's Avatar
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    Default New to Restoring - 1970's Nishijin "Circuit"

    For a time in my youth, I lived in Japan. I remember that a number of the stores in the town I lived in had Pachinko machines out front. As I remember, I would play for candy or gum.


    It was one of my fondest memories of Japan, and less creepy than sitting on King Kong's lap out side the department stores in Tokyo.


    I have always planned to buy a Pachinko machine, and last Sunday, that plan was realized.


    I bought a Nishijin Circuit Racer from a local Flea Market.


    It's in "OK" condition over all -- mostly complete, very faded, and the wood has some obvious age.


    It's playable, but not all parts work as I will detail below.


    My understanding is that there were different versions of this machine -- at least an "A" and "B". I'll post some pictures, and perhaps readers can help with identifying it.


    Interestingly, it was the early '70's when I was over there, so it may be that I actually played one of these. The race car theme is also appropriate (reference my username/website)


    As I mentioned, it is missing some parts.


    The cover over the jack pot ball chute is missing, and someone glued on plexiglass covers.


    The long vertical ball chute is missing. I think I have seen these on eBay, or I may just continue the use of plexiglass, and hand-cut my own.


    The worst situation is that someone has taken it's brain.


    The solenoid/switch assembly that controls the opening of the tire and sequencing of the lights on the "race track" is missing. The switches and the actual solenoid that opens the tire are present, but someone cut the wires short.


    I found a partial wiring diagram out here on the internet someplace (here?), and some videos on YouTube of gameplay, but the description on the wiring diagram and the videos do not agree.


    I suspect the unit shown on YouTube may have had a substituted control unit, or have been repaired incorrectly. I also think the notation on the wiring diagram may be partially incorrect.


    I have designed my own electronic sequencer based on a CD4017 counter chip, and I am now building that. Game play may not be exactly as it was, but the lights and tire will at least work, and be fully playable. Exactly how it will effect game odds is beyond my ability to compute.


    I am currently running it from a 9V wall-wart. I am not building a power supply. I intend to continue to use the same 9 - 10 V external power supply.


    One reason I am posting this is to get feedback on how much demand there is for my circuit.


    I would also like to hear from someone that has one of these that is known to be authentic, and working correctly.


    I am willing to share a schematic and parts list, and I may investigate having some actual circuit boards made if there is a demand.

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  3. #2
    Kungishi Spyder138's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    I think CarlW is your man. I believe he has done a couple of these and customized sequences, lights, etc. He is fairly active on the site and will likely see you post within a day or two. I have a working model, as I am sure many members here do, although it's a little hard to get to right now. I wouldn't call it rare, but it is less common than some other machines and tends to be one that collectors of vintage machines like to have in their collection because of the tire feature.

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    Kungishi CarlW's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Indeed, I have had a few. Pictures of the back would be great.

    Mr. Al recreated the circuit board.

    http://www.pachitalk.com/forums/show...255#post538255

    http://www.pachitalk.com/forums/vint...-complete.html
    Last edited by CarlW; 02-03-2016 at 11:31 PM.

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    Pachi Puro Moparformances's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    im not familiar with there being more then one version?? would love to see pics of yours..

    and of course

    Welcome to Pachitalk
    Never Doubt that a small group of thoughtful, .......... /........ If your not going to stand behind our troops
    ...committed people can change the world. ............. /.................Please, Please stand in front of them
    .....Indeed, it is the only thing that ever has............./
    .........................................Margaret Mead

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    Tokie Owens CarCynic's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Here is the link for the wiring diagram I was referencing :

    http://pachinkoman.com/attachments/F...racer_rev2.pdf

    My problem is where it says that the right and left play field switches close the tire.

    In the video, below, it clearly shows the green playfield switches opening the tire, and then advancing the lights.

    https://youtu.be/vNVOKDJ9VtU

    I am making my circuit work more like the video. A winning ball that activates the lower switch closes the tire.

    My circuit only activities one racetrack light at a time -- It's really just how the counter chip works, but I justify it by the fact that a racecar usually moves along the track, and does not stretch longer and longer.

    As in the video, after the 5th light, the tire closes again.

    Thanks for the replies, all, and pictures will follow shortly when I get in front of a real PC (using tablet now).

    Moparformances: Thanks for the info. If there is only one version, then I guess I know mine is from 1975.

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    Pachi Puro pachiwall's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Quote Originally Posted by CarCynic View Post

    My understanding is that there were different versions of this machine -- at least an "A" and "B"

    The long vertical ball chute is missing.

    I am currently running it from a 9V wall-wart. I am not building a power supply. I intend to continue to use the same 9 - 10 V external power supply.
    I have never seen a model A Circuit machine, that would be awesome!
    The long vertical chute is most likely the "ball dump"chute. Won't affect function...but make sure you never flip the ball dump lever, or all the balls in the top tray will spill everywhere.
    The power requirements for it is 10 volts for the lights. Don't matter ac or dc if using regular bulbs, dc if converting to LEDs. And 24 volts ac for the solenoid. Not sure where the 24 hooks up on Circuit. On my 3 star pachinko, there are 2pairs of screw terminals, one for lights, one for solenoid. On PowerFlash, one pair of screw terminals for lights, and a lamp cord hanging from the terminal block for 24 vac.
    Some pics would be great!

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    Pachi Puro Moparformances's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Quote Originally Posted by CarCynic View Post

    Moparformances: Thanks for the info. If there is only one version, then I guess I know mine is from 1975.
    sounds right
    Never Doubt that a small group of thoughtful, .......... /........ If your not going to stand behind our troops
    ...committed people can change the world. ............. /.................Please, Please stand in front of them
    .....Indeed, it is the only thing that ever has............./
    .........................................Margaret Mead

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    Tokie Owens CarCynic's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Attached are 3 images of my machine.

    Front view

    Rear View showing missing ball chute.

    Inside Rear View showing missing relay board, and power supply.

    I did not realize that the tire opening solenoid is 24 volts when I built my circuit.

    I guess I may be building/buying a custom power supply after all. :-/
    Attached Images Attached Images

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    Scowlin' Jean Hornigold hanabi's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Just popping a pic the right way up


    circuit right way round.jpg
    Angie ...
    Pachinkos, Pachislos, Coffee, Papercraft Ninja, Pinball

    I ran away with the Steampunk Circus!
    I was hiding in a room in my mind...
    You crush the lily in my soul...



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  17. #10
    Tokie Owens CarCynic's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Thanks. I guess Pachitalk doesn't do exif data.

    I made a first try with my sequencing circuit last evening.

    I had a few wires soldered incorrectly and one mistake on the board itself, so it had to come out again. I'll reinstall it again tonight and see if the tire part is actually playable.

    I know I took pictures of my circuit, but now I cannot find them.

    Pictures, and possibly a game play video to follow soon.

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  19. #11
    Pachi Puro mxfaiman's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    to Pachitalk!

    Quote Originally Posted by CarCynic View Post
    Thanks. I guess Pachitalk doesn't do exif data.
    You can attach odd files like that if you put them in a zip file.

    100 machines and counting...

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    Tokie Owens CarCynic's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Here is my "Circuit" board, installed for now:

    Attachment 83509

    It basically works, but it has 2 problems:

    1. Incorrect values for anti-bounce components. Lights do not advance as planned.

    2. I don't think it should work like in previously linked video. I modelled mine essentially per the video, so it is currently wrong.

    I now think the wiring diagram is correct. It is way too easy the way I currently have it wired.

    See also this video, which claims the machine is original:
    https://www.youtube.com/watch?v=NbEs1l2tFOE

    In this video, a winning ball in the top area (which triggers the lower switch) opens the tire and advances the light. Unfortunately, he does not show what the green switches do.

    Also, there do seem to be different versions. Mine only has one way around the "track". There are no lights (or graphic) for the section shown in the center of the tire (part covered when the tire is closed)



    DSC_0224_sm.jpg

    Compare this image with the graphic for sale on pachinkoplanet:
    http://pachinkoplanet.com/zencart/im...t_stickers.JPG

    The wiring diagram I linked to previously shows only 5 lights (none in parallel), and says "REV 2", so I think mine is a earlier version that some of the ones other people own.

    When I get the next chance to work on it, I will pull my board out again, and make it work like the wiring diagram says.
    Attached Images Attached Images

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  22. #13
    Tokie Owens CarCynic's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Sorry, all, I guess I just don't "get" attaching/embedding pictures in this forum. Strange that I can do it fine on other forums.

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    Fever Hunter MrAl's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Rev 2 is the correct version. I have more than one circuit and they are the same. Only one has the board I built. My lights and tire sequences are original and correct. I have PM'd you if you wish explanations or assistance.

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    Scowlin' Jean Hornigold hanabi's Avatar
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    Default Re: New to Restoring - 1970's Nishijin "Circuit"

    Quote Originally Posted by CarCynic View Post
    Sorry, all, I guess I just don't "get" attaching/embedding pictures in this forum. Strange that I can do it fine on other forums.

    I'm sorry you're having trouble, I think most members just click the 'paperclip' icon to upload and insert their pics inline (click 'go advanced' at the bottom of a post when you go to reply as the paperclip icon will then show to you)

    maybe this link may help explain much better than I can

    http://www.pachitalk.com/forums/gene...-pictures.html

    Angie ...
    Pachinkos, Pachislos, Coffee, Papercraft Ninja, Pinball

    I ran away with the Steampunk Circus!
    I was hiding in a room in my mind...
    You crush the lily in my soul...



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