• Midway Space Invaders faint sound

    From soderpalm@gmail.com@21:1/5 to All on Mon Jul 27 12:21:36 2020
    Hi group!

    I have a Midway Space Invaders that works like a charm except for one little detail...

    The "Invader hit" sound is veryvery faint. If I put my ear to the speaker I can hear the sound, but it in the mix with the other sounds it is too low to hear.

    So I guess it is some kind of amplifier problem and it must be in the specific "invader hit" section since all sounds mixes together in the end (I think).

    I have changed the 3900 at K4 and K5 (plus a few others) and the 7417 at F4 and the 4016 that seems to be involved.

    Does anyone have a little clue that could lead me to the right direction? Do you need more information? Please tell me if so.

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  • From =?UTF-8?Q?Mattias_S=C3=B6derpalm?=@21:1/5 to All on Tue Aug 4 06:49:14 2020
    Solved, it was a capacitor that was the problem.

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  • From Paul@21:1/5 to All on Mon Aug 10 23:23:00 2020
    On 8/4/2020 9:49 AM, Mattias Söderpalm wrote:
    Solved, it was a capacitor that was the problem.

    Which capacitor? Someone, someday could have the same issue. Resolution
    would be good :D

    Paul

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  • From =?UTF-8?Q?Mattias_S=C3=B6derpalm?=@21:1/5 to All on Tue Aug 11 00:29:33 2020
    Of course... stupid of me... :-)

    C19, just by K4, 0.47 MF Tantalum.

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