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Thread: Sammy "The Sands" Pachislo - Clicking and Flashing, Not Starting

  1. #1
    Tokie Owens JeremiahJackson's Avatar
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    Default Sammy "The Sands" Pachislo - Clicking and Flashing, Not Starting

    Good morning all. I hope this message finds you well.

    I recently scored a Sammy "The Sands" Slot on Marketplace for $20. What a deal!

    https://flic.kr/p/2nyrHHR

    When I got it, it was 100% flat. Nothing but the bulbs worked. Since then I recapped the power supply and the reel relay board.

    Now I can see displays flashing, but I can hear (what sounds like) all four relays clicking on and off at once, in sync with the flashing displays. Also, the small bulbs in the door are very dimly lit, getting about .5V. I assume this means that the motherboard is not getting the proper voltage it needs, so all it can do is reset and reset.


    My next thought is to replace all of the voltage regulators on the power supply. The two big ones that I can't find replacements for are:
    Sanken STR2005
    Sanken STR2012
    If anyone knows of a good replacement for those specific components, please let me know. I am not hugely experienced in picking replacement parts.

    Lastly, would anyone happen to have a wiring diagram for any of this? Or any other advice based on anything you see here? The motherboard is an Apex 701Z.

    Thank you for your time.

    https://flic.kr/p/2nyrNqX
    https://flic.kr/p/2nyjaDG
    Attached Images Attached Images

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  3. #2
    Gibisans - Japan West compirate's Avatar
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    Default Re: Sammy "The Sands" Pachislo - Clicking and Flashing, Not Starting

    Can't answer your questions, but I recognize the boat on the belly glass, it's the Delta Queen. No other riverboat has a single stack like that. I was on it when the astronauts landed on the moon!

    人生は恐れなければ、とても素晴らしいものなんだよ。
    人生に必要なもの。それは勇気と想像力、そして少しのお金だ。

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  5. #3
    Stuey - The RADministrator MrGneiss's Avatar
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    Default Re: Sammy "The Sands" Pachislo - Clicking and Flashing, Not Starting

    WELCOME!!!

    "Blowing smoke rings at the moon."

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    Chicken Fried Steak takethecastle57's Avatar
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    Default Re: Sammy "The Sands" Pachislo - Clicking and Flashing, Not Starting

    and biscuits
    When things don't go right the 1st time , Step back ,Take a break and come back renewed. RGS

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    Tokie Owens JeremiahJackson's Avatar
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    Default Re: Sammy "The Sands" Pachislo - Clicking and Flashing, Not Starting

    Just an update for anyone keeping track:

    At this point I've replaced almost everything in the power supply. I used a GND pad on the motherboard to determine which pin on the power supply the was GND. Now I can test the power supply, and it's delivering 5, 12, and 24V.

    The machine is no longer clicking and resetting, instead it just does nothing. The 24V bulbs on the door are all lit up, but barely so. Multimeter confirms that they're receiving 24V, so I wonder if it's pulsing on and off quickly or something.

    I am now following the circuit from the lights back through. I am really hoping I can find a faulty IC somewhere, since there'll be no reburning a ROM if that's the problem. There's a capacitor-powered RAM chip, and the cap is only giving it about 1.5V of the 5V it needs when the machine is off. I seriously hope that it isn't one of those situations where the whole machine is dead if it loses that information.

    Will update the post as I figure things out. If you have this machine and it works, I'd love to get in touch with you to check a couple things. Thanks.

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