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Newbie Aurora 8022 owner -Help!

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  • #1

    Newbie Aurora 8022 owner -Help!

    Hi there
    I am a new Aurora 8022 owner - yes the LSI one - not much loved apparently. I always wanted a Hammond since I heard Whiter shade of pale as a kid.in London.
    Well I now own one thanks to an elderly neighbour - its not well . no vibrato - E and D making rasping noises and some preset voices not working.
    So I am looking for some help! I am an electronics engineer and know my way about circuits - this all seems so simple but.... I cannot get any information, schematics or how the circuit boards work together. I would also like to offer advice in return, if I can!

    I have done all the usual prechecks, cleaned all the connectors, and am hovering with an oscilloscope to dive in, but without the road map its a daunting task.

    So if anyone is willing to share info I would be so grateful

    Stay safe everyone
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  • #2
    I'm trying a slightly different strategy as there seems to be no info on the 8022.

    I would think Hammond evolved these models - so does anyone know other models that use the 'MDD generator two package system' ?

    I think this is where the missing and warbly notes are generated.

    The boards are marked 023 047240 and 023 048426
    It uses MOSTEK MK6008N I think as a divider chain

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