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(Topic ID: 264377)

Bally - sterns mpu board

By Patrickr

4 years ago



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  • 10 posts
  • 4 Pinsiders participating
  • Latest reply 4 years ago by Patrickr
  • Topic is favorited by 1 Pinsider

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    #1 4 years ago
    OP
     
    ???

    Patrickr

    Inactive member

    US Munfordville, KY

    5y 16,900 64 17

    I’m working on my first SS. It a sterns galaxy. I’m trying to find out what is on the MPU board at C13 & C30.

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    #2 4 years ago
     
    ZAC

    zacaj

    RPC

    US Rochester, NY

    11y 158K 10,387 85 122 1

    Same MPU as Big Game, see its schematics here: https://www.ipdb.org/files/249/Stern_1980_Big_Game_Schematics_And_Wiring_Diagrams_Hi_resolution.pdf

    C13 is 0.01uF, C30 is 390pF

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    #3 4 years ago
     
    AMS

    barakandl

    nvram.weebly.com

    12y 132K 10,417

    c13 = 10nF (103)
    c30 = 390pF (391)

    All the capacitor values are in the Bally manual on the MPU component list

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    #4 4 years ago
     
    ZAC

    zacaj

    RPC

    US Rochester, NY

    11y 158K 10,387 85 122 1

    Quoted from barakandl:

    c13 = 10nF (103)
    c30 = 390pF (391)
    All the capacitor values are in the Bally manual on the MPU component list

    Are those always going to be consistent with MPU-200?

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    #5 4 years ago
     
    AMS

    barakandl

    nvram.weebly.com

    12y 132K 10,417

    Quoted from zacaj:

    Are those always going to be consistent with MPU-200?

    pretty sure all the capacitors and their designation numbers match mpu200 to bally -35. mpu200 just has an extra ram, some different types of logic chips, four more diodes. plus a handful of different and extra resistors

    wish stern would have made a component listing sheet like bally did. they probably did, just never put it in the manual.

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    #6 4 years ago
    OP
     
    ???

    Patrickr

    Inactive member

    US Munfordville, KY

    5y 16,900 64 17

    Is it these 2 at Marcos?

    EC9D9943-7EB2-44A5-9AEA-19DA81CFC2FD (resized).pngEC9D9943-7EB2-44A5-9AEA-19DA81CFC2FD (resized).pngF7C0FB82-3B7C-4625-9F99-ED289B847881 (resized).pngF7C0FB82-3B7C-4625-9F99-ED289B847881 (resized).png
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    #7 4 years ago
     
    ZAC

    zacaj

    RPC

    US Rochester, NY

    11y 158K 10,387 85 122 1

    That first pic is a resistor, not a capacitor. Second one looks ok

    1 week later
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    #8 4 years ago
    OP
     
    ???

    Patrickr

    Inactive member

    US Munfordville, KY

    5y 16,900 64 17

    Is this the right capacitor to replace the old one on the solenoid driver board?

    image (resized).jpgimage (resized).jpg
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    #9 4 years ago
     
    F X

    Coyote

    Pinside member

    9y 107K 8,987

    That'll work, yup. Slightly higher capacitance, but in this issue it won't bother anything.

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    #10 4 years ago
    OP
     
    ???

    Patrickr

    Inactive member

    US Munfordville, KY

    5y 16,900 64 17

    Thanks

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