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(Topic ID: 232727)

Help with Capacitor to Replace Battery on Gottlieb 80b

By ezatnova

5 years ago



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  • 8 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by ezatnova
  • Topic is favorited by 2 Pinsiders

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    Gottlieb_R7a (resized).jpg
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    #3 5 years ago
     
    INK

    Inkochnito

    Pinside member

    NL Piershil

    12y 91,650 3,169 12

    Quoted from slochar:

    Is the original battery a rechargeable one?

    It is.
    Without blocking diode will work perfectly.
    I had a Counterforce once with a cap on it and it held the memory for a year in storage.

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    #4 5 years ago
     
    INK

    Inkochnito

    Pinside member

    NL Piershil

    12y 91,650 3,169 12

    If I look at this clossely, I see you replaced R7 with a 2N4001 diode.
    Why did you do this?
    Now you do not get any voltage to the cap, thus it will not charge.
    Just put the R7 back in and you will be fine.

    Gottlieb_battery (resized).jpgGottlieb_battery (resized).jpg
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    #6 5 years ago
     
    INK

    Inkochnito

    Pinside member

    NL Piershil

    12y 91,650 3,169 12

    The black thing at the end of the white arrow is a diode 2N4001.
    This needs to be replaced by a resistor of 50 to 100 ohm to charge the capacitor.
    Otherwise it will not work.

    Gottlieb_R7a (resized).jpgGottlieb_R7a (resized).jpg

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